Druid's 'Drema's Druidfab Attachments !!

**#421** » 00:07:12, 26-09-2016

right then fellas ........

well it did pee down night of the 17th ....

but the ground was not the greatest anyway, Sunday morning, so didn't get to do anything .....

plus, ..... I hadn't been feeling the greatest either, since head butting yon Hill ...

Was gonna have to have my shit together Monday morning though ... promised the neighbour I'd go lift some bits for him.

Gave him my old gas compound, when I cleared the yard out ... better than skipping it, for what it was ultimately worth in the bin and he's finally gotten around to putting some pads in for it, to stand it on, last week.

Going to create a traccy/machinery shed with it and a few extra poles and roof sheets ..

So was hoping the 'Drema behaved itself ....... and his field wasn't too wet !!

well I had my shit together ... pity the 'Drema hadn't followed suit, !!

More to follow on that subject .... a n other investigation session was going to be required!!

A few pix for yer's in the meantime, from Monday 19th.

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run in was soft, shall we say ..... well softer than usual ... could certainly see where I'd been..

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But TBH, firmer than I'd expected it to be after the Saturday & Sunday night's deluges

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the two local builder lads he'd had come and do the pads and return today to assist in erecting it, were good boys, fairplay ....

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the fact that I'd made this originally, damned near 17 years ago helped too!! :grin:

Plus I'd been careful taking it down when I cleared my yard ... went back together a treat. :thumme:

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just the lid left to go back on .....

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which was on, welded and cleared up by 5 o'clock ... Not bad for a 1 o'clock start :grin:

He's gonna put a pole 'goal post' 4 m, in front of it, a few purlins from that to the compound, then sheet the whole lot ..... will give him a 7m wide and 8m deep traccy/implement shed, for next to sod all ... other than the cladding and the builder boys couple of days ... bit of cladding to the sides .... job done !! :thummar:

Oh and the doors'll be swung out to form the sides between the pole goal-post and it, once they're clad

The 'Drema'd been fine for an hour that morning, getting ready to go down next door, to stand the old compound ....
squared a few things out the way, VA-r off, straight/big forks on and the 3 ft Geith hung on 'em .... (never forget Massa Yoda's words - a great guy on the UK forum ..... go nowhere without a bucket to hand ... never know when you might need it to get you out the shit)..... extra chains, slings, welder, etc. onboard and set off ..... only to have the bloody drive fade out .. stop, go, fade ..... FFS

Switched her over from digging mode to travel (isolates all exc. functions) and seemed 'better', so set off again .... got there and switched back to exc. mode ...... OK 95% of the time, but still losing it occassionally.

With my new found 'insights' into 'the system's intricacies' and knowing a little more of what to listen for ..... I was 99% willing to bet me right nut (I'd already bet the left one on Martyn's wire-wound resistors earlier in the week on another thread on the UK forum) :grin:

that it's an LS system blockage .....
pump was not loading the motor at all .. :???:

fades out as LS pressure drops off and then, until you release whatever motion you're using and dump the residual LS pressure in the MVB, presumably behind the blockage, to allow it to shift, then 'go again', .. there's now't and no load on the pump, as it's been down-stroked, by the lack of LS pressure to upstroke it!!

" bloody clever these pumps are "

Hopefully, I was going to be a step closer to finding it ..... :vissla:

First job the next morning ...... LS line off at the pump, drain the main valve block with it, get it off and blow the bugger out, then get the union out of the MVB and hopefully find two orifices in the union :vissla:

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I reckoned two of 'em had to be in this hex nipple ... third might be in the end of the LS line at the pump ..... it was a queer looking male end on the line :???:

Had it out Tuesday and another masterful piece of Rexroth engineering it is too. :cool:

this is what I had out of it, with a back blow of 150 PSI air.....

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before stripping it ....

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0.6mm followed by 1.2 mm all housed in an M10 assembly with a 3 mm exit throttle.
all the LSs feed the pump's upstroke circuit through this unit.

I also had a damned good 'fish about' in the port it lives in with a fine probe ....... and had a rubber crumb out ........ which I promptly dropped, 'fore I could get a pic :aaargh:

.... wasn't much, maybe a mil an' a half max.!! :vissla:

I'd also blown the LS line from the LS port/throttle assembly to pump's LS port at X through with the air line ..... obviously disconnected both ends, into a catch .....

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and got sod all other than Plantohyd in the catch. :vissla:

needless to say it was all surgically clean when it went back together. :thummar:

this fiddly shit takes some time, especially jammed in the bowels of the old girl, being ultra careful not to lose/have anything unforeseen escape!!!! :uupps:

Anyway ............. :vissla:

Got it all back together and ran her up .... left her warm up for five whilst I crawled all over looking for leaks/drips/etc. :???:

.... now't !! :grin:

so .... gave it a go ..... picked her up from park, wrapped her up and swung her round so's I could get under her/at the arse end, to clean up all the oil in the 'pit', under the MV block :uupps:

.... carefully as I'd left her running to warm up. :vissla:

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Things were better but a little erratic to start, :???:

which I put down to the copious amount of air I'd introduced into the LS circuit by completely draining it and those throttles weren't exactly huge to deal with it, even with all the pressure in the system. :vissla:

Stuck a bucket on her and worked her 'light' to start with ..... getting better !! :smile:

to the point that I had to give her something to challenge her ..... enter some dirt and a few boulders ... :grin:

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dug well, ripped this out ... no sweat ...... :thummar:

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and slung it about, with ease. :grin:

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pretty fair lump and was ripping beds off the top, as per 'normal' :thumme:

I'd say ..... very cautiously ..... the beast was back!!

Travel was also now, as was, harsh/sharp, aggressive even ..... as she was !! :thumme:

Remained to be seen how things were the following morning ..... hopefully it'd be dry enough to get her up the ramp and do a 'bit more damage' to a few more boulders and 'shite' !! :thumme:

She really felt like the m/c I've gotten used to these last 2+ years and handled roughly would leap about as she always has. Handled smoothly ... some tool !! :cool:

If she ddi it again ........ I knew the first place to look next time!!!!
I'll be surprised if it doesn't .... where there's a crumb ......... there's probably more ..... having said that ..... :vissla:

the amount I had out of the old return filter, wasn't huge and the amount I had out of the new return, a few weeks ago was minimal really. :vissla:

We would see !!!!!!!

Again a case of Watch this space !!!!!

as Vinny Jones'd say (another well known welsh man) ......"It's been ............ emotional"

I've learnt a hell of a lot .... could've done without the OMG moments and stress of it all and would've been even better if she'd decided to have a wobbly on the patch, instead of elsewhere.... after I'd finished doing what I was about at the time. :vissla:

Ground up there was still :sad:

Was going to give her a further work out and if she behaved, then go see what could be done to finish the original job

....... it was gonna be messy though :uupps:

....... 'less I could find summat a bit harder to stand on, under the sludge/cheesecake topping :aaargh:

a few pebbles from the day's ripping sessions

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once I'd gotten it on the bucket ... it took some doing anything with ...and keep both axles on the floor !!

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It was a toss up which was the heavier :uupps:

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**#422** » 00:57:53, 26-09-2016

So...... Friday morning ..... I was ......in the shit ...... :uupps:

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can see now why many lads don't like legs :vissla:

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oh for a set of floaties .. :sad:

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Looked reasonable in the half light when I'd finished and gotten back out .... :vissla:

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The cold light of day might prove otherwise !!!!!
just had to cover me 'exit' tracks, square up the verge a bit ..... oh and clean up a bit from the twins !!!!!! :uupps:

Dug like a Trojan .... all from virtually one stand ... good ol' VA-r :thumme:

..... would've been some serious effort and mess, with out the capability it gives .... I can really see why folk spend BIG bucks with/for/on 'the competitions' offerings !!!!!!
Got to build me a long toed tilty grader though!! :grin:

was barely light when I went past it Saturday morning, on me way out and dark by the time I got back !! A n other day in Ross on my mate's garage project

If it was passable you'll get to see it :vissla:

Saturday's ride ..... :vissla:

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Dash 4, 1500kg Kub .... can't say I'd rush out an' buy one ... sort of did the job, but real skittish, and leapt about like a cat with a bee on its nose !!

Should be called a mini scraper, not a mini-digger :aaargh:

.... get hold of anything and it needed bolting down to the planet :aaargh:

...... but 'spose I am a bit spoilt in the stability stakes, usually. :grin:

And I didn't add anything to the custom paint job on the arse!! Animals!!! :aaargh:

well thank **** I got my bum in on the tank site Friday ..... :vissla:

Rain was biblical again here yesterday evening/night .... the lake's back !!!! :uupps:

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good job I'd got the ditches re-dug up there .. it'd have been everywhere otherwise !! :uupps:

Had a look at it this morning ... cold light of day, etc. ..... not too bad :vissla:

... couple of bits could've been a bit flatter, but was running out of light rapid, Friday. :sad:

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the rectangular 'bed' on the left is a ton of 20mm to dust, in a pit, for a base for the tanks ..... sand bed to go on top of that.

Neighbour on the dog an' bone (phone) first thing this morning wanting to know if I was up for shifting the sand in there and digging the pipe trench !! :uupps:

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reverse dug the bulk of the trench for the pipe routing :vissla:

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all ready for a full day re-positioning the tanks and re-routing all the pipework next week :thummar:

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then it pee-ed down !! :aaargh:

........ for half an hour :huh:

.... gathered up me gear and headed back down to the patch .... 'Drema behaving well :grin:

links to several more ..... for them as is interested !!....
http://s1275.photobucket.com/user/v8dru ... AND-page=1
http://s1275.photobucket.com/user/v8dru ... AND-page=1

Had an hour, after a bite to eat, tidying up some of the boulder collection from the other day :vissla:

.... stuck the Cranab on and put a few of the smaller ones away in the heap, :thumme:

then .......

'twere time for a challenge :uupps:

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Cranab was not having any of it :sad:

..... could get an end at a time up, so put some timbers under 'em and dropped the grab off in favour of the forks :smile:

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....... for the 'little un' .... t'other one's gonna get a set of chains and the VA-r dropped off for max. cap. .... it's bloody heavy !! :uupps:

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Then find a home for 'em, tomorrow ..... if it's dry. :thummar:

so ..... It would appear that the LS circuit's throttle orifices were to blame for the issues ..... or at least something giving them grief was !!
would be nice to think that this is the end of the episode ..... but sod's law being what it is ..... where there's one crumb ..... :aaargh:

It will be my first 'port of call' next time though :vissla:

I have learnt a hell of a lot though and due in great part to Jac, et al's inputs in here and a few of the guys on the Uk forum too, for which I am eternally grateful ... Jac's highlighting of the orifices was without doubt, pretty crucial to finding this issue. :cool:

Just hope she behaves ....... for a while at least :thummar:

Just goes to show .... no matter how big Goliath is ...... doesn't take a lot to stop 'em dead in their tracks :aaargh:

It's real nice to get in her and have that 'raw power' back at my finger tips !! :cool:

Perhaps now I can get on with finishing the flail's mount and see if that's going to be a successful att. for her.

'Sposed to pee down again tomorrow though :aaargh:

**#423** » 16:41:18, 26-09-2016

Well done! Nice to hear it seems to be working good now! :thummar:

**#424** » 20:13:35, 26-09-2016

Jac skrev:Well done! Nice to hear it seems to be working good now!

Thanks Jac :bira:

.... and thank you for all your help :shake_hands:

..... " a problem shared is a problem halved " :grin:

or in this case cured :thummar:

.... hopefully :vissla:

I have, as I said previously, learnt a hell of a lot :vissla:

.... quite a lot of it, as a result of your input :thummar:

You are a star :rock_on:

**#425** » 00:56:34, 07-10-2016

I'm back ..... been off line for a few days ..... 'the boss' dragged me off to her boy's place in Plymouth, for a long weekend. ...... Different !! :vissla:

........ but before we could go ..... :huh:

Tuesday, last week .. bit of time prepping the new tank with some fittings and sorting out gear for an onslaught on the Wednesday (and Thursday) sorting out the tanks' new home and plumbing !!

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Transferred half the contents from one original to the new one once in spot, before having to let go the other half to get it out and cleaned out, ready to relocate it ...... :thumme:

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before doing the same again with the third one and to allow the first one to refill, as that's our only storage for our place.........
was a bit of a juggling act, through the day ....... :smile:

and I was like a greased eel in and out of the tanks cleaning out years of settlement and installing new ports/plugging old, defunct ones!!
I'm the only one here with narrow enough hips to wriggle into the apertures.

Jeez did I need a shower by the end of the day !!! :uupps:

Eventually ended up with all three in their new homes ....... :thumme:

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and filling happily, with the new lines roughly positioned, ready for a more permanent positioning job the next day :vissla:

Interestingly ..... although the original two are marked up 1520 ltrs..... they're 3" shorter and 4" smaller diameter than the new one, which is also marked up at 1520 ltrs ?????? Figure that one out !!? :???:

anyway ..... by late afternoon Thursday we had them somewhere near how we wanted them and needed to let them fill for fine tuning on levels, etc. :grin:

I had a few hours tidying stuff away on the patch and managed to re-locate the BIG lump of a rock, onto the top of t'other big lumper, with the forks ..... just .... :uupps:

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and had everything as I wanted it, to leave unattended for a few days. :thumme:

Pam's daughter was going to come up from the village and take care of the mogs, a few times a day and spend time here too, so not 'unoccupied' as such .... plus the neighbours'd keep a weather eye too. :vissla:

Checked the tank situation, at dusk and all filling well ..... found one leak, where we'd pulled a line securing it and sorted that, otherwise all looked good. :thumme:

Friday morning, getting ready to head out and the neighbour who I'd been doing it with, is on the horn, to say we had a leak ...... went through what I'd found the night before, asked if it was that and he says ...."Nope" .... :sad:

We were gonna have to relocate the overflow level as we'd been about an inch too ambitious with it and it was pissing out the lids ..... which was annoying!! :aaargh:

So ....... overalls on, gear together and go sort it ...... plus fine tune the outlet (for now) to the barn while we are at it, as that didn't want to play either and no water in there for the nags !! :vissla:

He says to me when we'd just about sorted it all ... "what time you off to Plymouth? This evening or the morning? "

"Soon as I get these overalls off" was the reply !!
"Oh ... you may be in trouble then !!"
"Possibly, if not probably!!" ........................ an' I was !!!! :grin:

sorted though and didn't have to worry about it whilst gone! :grin:

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still a little 'refining' to do here and there, but think we have it 'cracked'. :thumme:

Before anyone chimes in about exposed plumbing ..... it's the way it's always been here ...... it's a continuous flow and never freezes .... even in the -14C we had here for two weeks in 2010 .... as long as it flows it stays liquid ........ and at a gallon a minute ....... it's running well !! :thummar:

Just got to get up there and finish tidying off the earthworks, etc., at the front edge .... it was going to be a job in the morning, Yesterday 'praps!! :vissla:

**#426** » 10:42:57, 07-10-2016

As usual, good telling and good viewing this thread!! :buga:

Watching this space! :thummar:

**#427** » 01:59:12, 08-10-2016

well "the morning" didn't quite pan out as planned :vissla:

.... had to go into town !! :sad:

Got back lunch time and Pam said the neighbour'd been up, to see if I was up for standing up his pole goal post as he'd gotten it together. :vissla:

'Trolled down his place for a shufty and sure enough he was ready for a lift. :thumme:

Ground was a tad soft going in ...... :uupps:

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... and was glad I'd taken a bucket or two with me (just in case, as Rob keeps reminding me on the UK forum

), but didn't need 'em ultimately. :smile:

Stood it up and maneouvred it into the holes, but could not see WTF I couldn't get it lined up each side :???:

....... 'til I measured it !! :idee3:

A foot too long !! :aaargh:

So back on the deck and Chris gave it a bit of a trim ... :grin:

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In fairness to him, measuring it up on his own, over the weekend ..... with a 3m tape probably wasn't an easy task :screwy:

...... as it's 7m wide !!!!! LOL :grin:

an easier proposition with a 10m tape !! :thummar:

Dropped the forks off in favour of some chains, for a bit more flexibility (and security)

and stood it up again .... :smile:

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...... lot better fit this time :grin:

... width wise!! :thumme:

Had to have it back up in the air once more :vissla:

..... to take 6" off the bottom of the one leg and 3" off the centre one :sad:

.... no way was I gonna leave it 6" out of level :huh:

... looked terrible from the cab .. and no better from the floor !!!!! :aaargh:

Don't often see me blade down, but the ol' ground was a tad soft under that F/O/S wheel on a reach !! :vissla:

Gates were handy bracing for keeping the poles 'put', while the concrete went in and off. :thumme:

He'd originally planned to use 'em as part of the front sides, but tells me today :vissla:

that (after I'd suggested it) :smile:

.. he'll put some purlins/clad rails in, instead and retain the facility to have the rear half as secure storage, using the lockable gates. :vissla:

Would certainly been a waste of a good pair of gates and a secure compound, otherwise!! :grin:

All stable and solidly fixed, I grabbed me pallet of buckets and headed home, :thumme:

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... trying to make minimal 'tracks' on me way out :smile:

.... managed to stay in the ones I'd made, on the way in, most of the way!! :vissla:

Wednesday's tidy up got a few hours devoted to it yesterday instead, but was hard going :aaargh:

.... ground is still as sticky as **** :aaargh:

.... was either trying to shake it out the bucket ... or off it :vissla:

.... not an easy proposition getting any sort of finish with the claggy shite !!!!!! :aaargh:

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t'other end of the pipe .... needed a damned good clean out and would've gone further, :vissla:

but damned near got stuck as it was :uupps:

.... soft or what !!! :uupps:

Job for a MUCH drier week ..... MUCH!!

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Not really happy with it, :sad:

but not a lot of choice :sad:

.... need some drier stuff to get any sort of decent finish and nothing there to 'win' to achieve that with !! :vissla:

The blue pipe is the over-flow and usually just runs to the stream bed,

but can be connected to the long run down through all the jungle undergrowth to the neighbour's orchard :smile:

...... "waste not, want not" :thummar:

I know I can better this ....... with some less sloppy/claggy shite to work with :aaargh:

it's just going to have to wait!! :vissla:

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Job for a n other day! :vissla:

**#428** » 02:13:21, 08-10-2016

Now then ..... brain picking time again . :grin:

First Q.
can anyone give me a definitive working pressure for a hydraulic QH circuit? :???:

The Miller on the 'Drema has been plumbed into the 'Delta' pressure circuit on her. This accoding to Jac is apparently the pressure which the pump first generates on start up & subsequent running and 'balances' the control spring in the main pumps, which downstrokes the pump when there is no load sensed in the LS circuit. :thumme:

The Miller has never let go of anything I've thrown at it .... and it has had some sort of weights exerted on the clamp by my 'BIG' forks, as they're held by the Miller's clamp. :uupps:

.... so 50 bar appears to be adequate ...... :vissla:

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The 'Delta' pressure never varies !! :thummar:

second Q
is this normal practice for plumbing in a QH circuit .... i.e. using the 'Delta' circuit? :???:

I understand from jac that 'Delta' circuit pressure is more normally around 25-30 bar and the 'Drema's pressure is quite a high one. :???:

Therefore ..... the QH valve's RV may well be set at 50 bar or possibly even as little as 25-30 bar in order to maintain a flow and not dead end that circuit at full stroke of the hitches cylinder, either open or closed. :???:

Guessing however that it's set at 50 bar, or the delta pressure on the gauge'd be well down as the Miller's QH valve's RV would be dumping it lower, if set below 50 bar? :vissla:

Now then ..... the reason for the Q.s is ....... :smile:

after fitting the Hill's QH valve into the VA-r's system, I feel there is a distinct deterioration in it's performance and deffo a poorer holding capacity on the grab, when fitted & plumbed in. :???:

To recap/refresh memories on the VA-r's 'nuances' ......

it's fed by my proportional rotate pedal - one way only and all directional control is achieved by the three Cetop3 valves in its guts, :thumme:

which are fed by a one way proportional P to T circuit ..... at 160 bar (the factory set, rotate circuit's working pressure - going to ask them if I can up this at all??) :grin:

The Hill's QH valve is tee-ed into this P to T circuit and every time the VA-r's circuits are pressurised it (the QH valve) gets 'topped up' with pressure, in parallel with whatever circuit in the VA-r is activated. :thummar:

....... are you with me so far? :grin:

Now..... I'm of the opinion .... [and going to have to get the gauge into the QH valve's supply circuit to test it] ..... that the Hill's QH valve's RV is dumping the majority of the 160 bar pressure it's getting fed, at whatever relief pressure it's set at :sad:

(hence the gauge required to establish this)

.... not so much of an issue with the tilt/rotate circuits of the VA-r (although it wasn't too fussed on spinning that BIG rock around the other day) ...... but ..... connect a grab/clamshell to the Aux outlets .... which are also fed by the same P to T circuit and it's a BIG issue especially if the Hill's QH valve is set real low (like 25-30 bar) :uupps:

Having given this much thought, I have two alternatives, as far as I can see. :vissla:

1
up the pressure at which the Hill's QH RV dumps ..... if it's possible, :???:

to 160 bar and if the hitch'll stand that sort of continuous working pressure? - should do, I'd have thought? :???:

or

2

do what I was originally trying very hard to avoid :aaargh:

and lay in a n other separate circuit completely, to the Hill's QH valve, from the 'Delta' circuit, :vissla:

in parallel with the Miller's circuit and set the Hill's QH valve's RV to dump at 50 bar too :vissla:

..... again, if possible.

A gauge installed in its circuit will soon tell me if it's possible or whether it's already at 50 bar? :thumme:

If, as I understand, a more normal 'Delta' circuit's pressure is closer to 25-30 bar, I will have to see if the RV in the Hill's QH valve will actually screw down to 50 bar???? :vissla:

hence the first Q above !! ........ anyone have any idea of a QH working pressure and whether the use of a 'Delta' circuit is the norm to power a QH valve's circuit??? :???:

Mick, who I had the Hill from, will have taken this valve off his Komie when I had it/he replaced it with the new Geith valve, that arrived with his tilt hitch, but whether he'll remember how it was plumbed, is something I'll have to ask him? :vissla:

Thoughts/comments, gentlemen please?? :vissla:

**#429** » 08:57:04, 08-10-2016

I haven't hade the time to "embrace" all of the previous discussions concerning the drema hydraulics......so I may be way of.... :klia:

...but...
LS hydraulics, as far as I know, uses:
One system pressure ( and that's the most you'll get out of it as pressure goes, with out changing the factory settings of the pump regulator)
One Stand by pressure ( when its "idling" .....I guess that's what You v measured to 50 bars ?... or is the machine servo controlled, so its the servo pressure, that used to secure the attachments´, You v measured ? .... :klia:

)

And by activating the LS -feed ( to sens the pressure needed for the function ) you get a rice, from any where near the standby- to the system -pressure, as neaded for the moment ......

...the "delta-pressure" is what makes this rice happen .....with in the regulator. (I don't think you can find that pressure out on the boom... :klia:

)

When you attaches "non-LS" hydraulics to a LS-system, you usually needs to "trick" the pump regulator to rise the pressure..... and that's where T-junctions with chokes ect comes in....

But as I sad to start with, this may be out of context sins I'm in no way up to speed on how Your machines inner workings.

**#430** » 10:04:32, 10-10-2016

V8Druid skrev:First Q
can anyone give me a definitive working pressure for a hydraulic QH circuit?

nixs or mathiast probably knows this. I would think the cylinder is springloaded as well but I don't know

V8Druid skrev:second Q
is this normal practice for plumbing in a QH circuit .... i.e. using the 'Delta' circuit?

again, I'm not sure. other people on the forum knows a lot more about this.

Maybe I'm overexplaining now but...there is really no such thing as a "deltaP circuit". DeltaP is a pressure difference between the load pressure (measured on the load side of the main valve) and the pump pressure (measured right on the pump). At idle the the load pressure should be zero and the pressure measured at the pump (called standby pressure) will then roughly correspond to deltaP. Typically the standby pressure will be a bit higher than actual deltaP with load. In some earlier post the standby pressure was found to be 50 bar (I think) even though your hydraulic schematic states 22 bar.

Assuming it's 50 bar:
If your load pressure is zero then pump pressure will be 50 bar (this is directly measureable with a simple pressure gauge and is called "standby pressure")
- if your load pressure is 75 bar then pump pressure will be 125 bar (two pressure gauges are required to get the 50 bar deltaP when operating the machine with a load. or some fancy electronic device)
- if your load pressure is 150 bar then pump pressure will be 200 bar
and so on

I assume the QH is just connected to the pump pressure. If you marked in the schematic where it is connected it would help and a picture to top it off it would be nice.

**#431** » 12:17:51, 10-10-2016

There are new things to be learned every day!!! :hurra:

**#432** » 00:58:07, 12-10-2016

Jac skrev:
V8Druid skrev:First Q
can anyone give me a definitive working pressure for a hydraulic QH circuit?

nixs or mathiast probably knows this. I would think the cylinder is springloaded as well but I don't know

V8Druid skrev:second Q
is this normal practice for plumbing in a QH circuit .... i.e. using the 'Delta' circuit?

again, I'm not sure. other people on the forum knows a lot more about this.

Maybe I'm overexplaining now but...there is really no such thing as a "deltaP circuit". DeltaP is a pressure difference between the load pressure (measured on the load side of the main valve) and the pump pressure (measured right on the pump). At idle the the load pressure should be zero and the pressure measured at the pump (called standby pressure) will then roughly correspond to deltaP. Typically the standby pressure will be a bit higher than actual deltaP with load. In some earlier post the standby pressure was found to be 50 bar (I think) even though your hydraulic schematic states 22 bar.

Assuming it's 50 bar:
If your load pressure is zero then pump pressure will be 50 bar (this is directly measureable with a simple pressure gauge and is called "standby pressure")
- if your load pressure is 75 bar then pump pressure will be 125 bar (two pressure gauges are required to get the 50 bar deltaP when operating the machine with a load. or some fancy electronic device)
- if your load pressure is 150 bar then pump pressure will be 200 bar
and so on

I assume the QH is just connected to the pump pressure. If you marked in the schematic where it is connected it would help and a picture to top it off it would be nice.

Connection to the 'Delta' port Jac :vissla:

main port test point is to the right of the 'Delta' port, which has a tee, with the Stauf fitted in it. :thumme:

Clock reads 50 bar and never waivers

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You can see the P line to the Miller's QH valve coming out the tee in the 'Delta' port to the left .. spiral wrapped hose

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I'll get a schematic marked up for you tomorrow ..... :vissla:

...... if I can work out where to mark it :vissla:

it's the port next to M1 below ....... which unfortunately isn't labeled :sad:

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**#433** » 01:31:03, 12-10-2016

Saturday didn't quite go as planned ..... least not the way I'd planned, anyway and 'twas easier to comply with 'the boss's' ideas for the day, than get the ear ache!! :vissla:

So it was gonna be a morning job with the clock and test ports!! :huh:

Got the rest of the tree's remnants lopped, split and in the baskets .... :vissla:

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.....well most of it anyway ..... need to find a home for this lot too ..... :vissla:

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then go get some more, from Pam's farmer cousins who've offered a load or two ..... and you never look a gift horse in the mouth ! :grin:

This morning's 'challenge' was finish off the decking's non slip treatment .... as it'd dried out very nicely ...... :cool:

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Blackfriars (the makers) supposed coverage was a bit of a joke and a second tin had been required ..... 23 sq. M my arse!! ..... reckon I got about 10 or 11 out the first tin !! :aaargh:

........ anyway, done and it's damned good stuff :thummar:

..... have used it before, years ago, on a deck at Pam's old place and it lasted very well, so won't be doing it again any time soon. :grin:

Grass was next on the agenda/executive decisions list :vissla:

.... been waiting for it to be dry enough to 'exercise the dog' (the Great Dane) on the side of the drive for best part of two weeks :sad:

...... with the resultant growth being 'extensive' !! :uupps:

Anyway, that was after I'd had 'the boss's little Mountfield (mower) to bits, to see why it was no longer 'self-propelled' :sad:

.... belt knackered and amazingly didn't have anything suitable!! Close but not quite !! :vissla:

So ended up shoving that damned thing around the smaller bits, :sad:

'fore stretching the 'dog's' legs !! :thummar:

Dane performed faultlessly :thumme:

.... those new herring bone pattern tyres make such a difference to traction :hurra:

...... 'til I'd finished .............. and it threw it's blade belt !! :aaargh:

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having chewed the crap out of it first ! ..... :eek:

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Fortunately ....... it'd arrived with a new one, :smile:

that the previous owner had had the foresight to buy :cool:

....... and pass on !! :thummar:

problem solved ...... :grin:

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.... but not before I'd made damned sure I had a record of its numbers !! :vissla:

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Must get a n other spare ...... and two for the lil' 'un ........ they always give up the ghost on a Sunday !!!!!! :aaargh:

Bought two new, identical belts Sunday night for 18 quid so should be good for some time now. :thumme:

Changing 'em is a doddle too :smile:

..... unlike the Countax :aaargh:

Can see why these mowers are so sought after ..... and expensive, new !! :vissla:

On less trying terrain it's a pleasure to use. :cool:

got in her yesterday morning, to move her over for a re-fueling session and came nose to nose with a stowaway ...... :eek:

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'bout inch and a half (4 cm) across !!!!! :eek:

After evicting said hitch hiker, she got 'an infusion' of 'cherry', :thumme:

before ......

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picking up my 4 footer, which'd been full of quite decent (for here) :smile:

soil,

for the last couple of weeks, to empty it into the Thwaites and use it for tidying the verge, up by the tanks.

It's bugging me every time I go past it !!! :sad:

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The top hat bushes and 50mm pins got a bit of exercise to help with the task. :smile:

looks a big old bucket under the VA-r !! :uupps:

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.... which it is, at 0.85 cube! :vissla:

Spent the rest of the day tidying up, up top .. dry enough to get on there ATM. :cool:

Won a bit more decent soil, after shifting a few pallet-loads of stone off the top of it and re-locating them to somewhere a bit more accessible from 'the hard', :thumme:

before sticking the 'decent' soil in the dumper, with the 4ft's bucketful, which got dropped off, beside the drive this morning. :vissla:

Treatment/Clara day today and all she wanted, all day, was 'Grandad' to carry her about, so not a lot done, :vissla:

after she arrived. :grin:

Pam is well miffed :sad:

that she's yet to learn to say 'Granny', :smile:

but is well capable of yelling Grandad, loudly and repeatedly, 'til she gets the attention she wants !! :grin:

Walking well too ... :cool:

at 11 months, so at least I don't have to lug her about all the time .... :vissla:

just as well ... the ol' bod' was complaining a bit today, as it often does, when in need of a top up on me 'hamster juice'!!! :vissla:

Clara started to crawl about 2+ months ago :thumme:

.... gave it a go for a couple of days, :smile:

then must've thought 'sod this', :vissla:

stood up and hasn't looked back :grin:

I've never had kids of my own, so it's all new to me :vissla:

..... she's such a little monkey though!! :grin:

Her Christening will be shortly and just been scanning a pic for Pam :vissla:

...... of Clara's mum's christening outfit :smile:

Clara Mk I ...... her mum 29 years ago :uupps:

**#434** » 09:04:09, 12-10-2016

V8Druid skrev:Connection to the 'Delta' port Jac

The word delta still means pressure difference, not a single pressure. :vissla:

V8Druid skrev:main port test point is to the right of the 'Delta' port, which has a tee, with the Stauf fitted in it.
Clock reads 50 bar and never waivers

I think both these ports measures the same thing, the main pump pressure. Edit: I think it's port G on the schematic.
50 bar is what you get at idle (standby pressure). If you lift the boom I think the pressure will go up.

**#435** » 15:05:33, 16-10-2016

..... summat different Thursday!!

Have a fence down the side of our original driveway ....... which I'd happily relocate to the wood shed !! :vissla:

..... makes no odds to us, whether it's there or not, but the neighbour seems to like it there, :smile:

to screen his yard a bit, even though there's a block wall there and a 7ft drop into his place! :uupps:

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Wind saw off a few posts earlier in the year and he's been mythering to 'give me a hand' to fix it for months :sad:

.... he'd probably be horrified to know I'd rather rip the damned thing out.

It's a rapidly rotting piece of crap, that needs regular painting/coating and I'd rather see the back of it !! :vissla:

Anyway, we'd agreed last week, to do it Thursday and he'd gotten a panel off, by the time I'd had me brekky and gotten my head into 'doing' mode. :smile:

Said knackered posts are/were set in concrete pockets and I'd had the breaker pack out and fired up, over the weekend.
So hauled it out the box with it's business end, pipes, load of other tools, slung it under the 'Drema's hook, having selected a suitable bucket to clear of some of the back fill and trundled it all down to the old drive. :vissla:

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Sod wheeling that more than a few yards .... it's bloody heavy and awkward!! :thumme:

Now although he's seen the potential/capability of her over the last few weeks/months, I don't think he quite had the grasp that a few bits of concrete were'nt gonna be any match for a 2ft bucket, suitably attached at the business end of the old girl !! :grin:

Cleared the back fill off the tops of 'em all ..... :vissla:

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then ..... 'accidentally' gave one a 'tug' and out it popped !! ... "shall we give the others a try?"

Five minutes later ....... :thummar:

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..... three lumps in't dumper and three post holes 'dug' !!! :cool:

So ..... time to put it back up ..... "How about assembling it all on the floor Chris, then just pick the bugger back into spot, trim the posts, once sussed .... job done" :grin:

"You think that's do-able?" :???:

"Hell yeh .... with a bit of thought and cunning" :thummar:

twenty minutes later ........ :grin:

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Sussed the trimming required on the posts, picked it back out, waved 'charlie' .. the chainsaw, at 'em and back in !! :smile:

Propped/braced upright and slotted two bags of post mix into each of the holes ..... time for a coffee !! :thummar:

Tidied up what had come out .... :vissla:

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...... gonna need some more fill as it's now looking a damned sight better than it did and is all up level, :smile:

instead of the 'gully' it was !! :vissla:

Not bothered about the bottoms of the boards ... should be in the wood shed anyway !! :grin:

Life is so much easier with a VA-r !! :thummar:

tidied up and put everything away ..... looked like it was going to rain !!! :sad:

So stuck the 5 footer on and shot off up the drive to the tanks. :vissla:

I wanted to sort the pile of decent-(ish) soil I'd dropped there, to tidy up with, before it got as wet as what was already there!! :uupps:

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Much happier druid now :grin:

..... was really bugging me :aaargh:

..... Pam has given it the seal of approval and even suggested seeding it !!! ....... Phew !! :thummar:

Could've done with a bit more s(p)oil really, but will do for now ... 'less I can win a bit more soon, from my dig !! :vissla:

The 'banky' bit is just too bloody wet to do anything more with, :sad:

'til it dries out .... a lot !!!!! :thumme:

Like trying to shape up Plasticine !! :aaargh:

One last thing for now ...... reckon we are in for an 'interesting winter' !! :???:

Going on the amount of berries about ATM ..... does not look good!!! :vissla:

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Never seen so many on this plant :uupps: