The Craftmans Shop > New from Old
It's BIG, Yellow and digs holes! JCB 3CX Project 8 is joining the Tractor Shed
awemawson:
Carrying on with the 'sort all those little jobs' theme on the JCB I today fitted the near side hose guard. When I got the machine the original (JCB Yellow) hose guard was very mangled and I've not been able to source a replacement. It's bent from a sheet of 2.0 mm yellow HDPE sheet - and I couldn't even find a source of the sheet unless I bought a metric ton of the stuff, so I bought black. The black sheet has been kicking about my workshop while I remained in hope of either finding the real thing or yellow sheet.
But no - so yesterday it got cut to size. I had heated up, ironed out the mangling in the original, and plastic welded it with a soldering iron to be able to get a decent pattern, but the plastic welding isn't strong enough to bend it to use it.
Now before fitting it I decided to steam clean all the plumbing behind and about it - not only makes the fitting job more pleasant but helps enormously in tracking any further hydraulic leaks.
So that's one more job off the list. The ram for the offside front bucket crowd function has a small weep so at some time soon I need to pull it apart and replace the seals. Fairly straightforward job apart from the sizes involved - cylinder cap nut for instance is 65 mm AF and on at a huge torque so that will be fun. I made a 65 mm 'flogging spanner' the other day on the CNC Plasma Table in preparation.
awemawson:
When I made up the excavator bucket crowd hose the other day I blindly copied what was there - except that it had 'hose wrap protector' on it to save it from chaffing. Well I had some wrap on order and it arrived today.
It's a bit of a b****r to fit to already installed hoses but possible, so that was this mornings little job. I'd just finished BOTH ram hoses realising that the other one had no wrap when I realised that the hose that I hadn't changed had a much nicer routing. It had straight 1/2" BSP female fittings on both ends whereas the one I removed had a 90 degree bend on one end making it stick out like a sore elbow !
Then it dawned on me - someone in the past had burst a hose and just used what was to hand that 'sort of' fitted' Time to make up another hose with straight fittings on both ends. It lays so much nicer in the guides and doesn't stick out like the last one !
awemawson:
JCB's are well known for 'marking their territory' so it is no surprise having fixed the bigger oil leaks smaller ones are becoming apparent !
I noticed today that one of the 'hdyra clamps' has a small weep. These four short stubby hydraulic cylinders clamp the 'back actor' to the 'rear rail'. Relaxing them allows the entire back actor to be 'side shifted' and in operation they are pumped up locking everything together.
The individual bits are available, but I notice that the upper pair look quite different from the lower ones, one of which has the leak. I am minded to replace them all to get to a known starting point - a full kit is available and although not exactly cheap won't break the bank - especially as I have other bits to order that will share the carriage charges.
awemawson:
I have Hydra-Clamps and Rod cylinder seals on order but not yet arrived, so I decided to tick off one more 'get round to it one day' jobs on the JCB.
The cab doors were both originally equipped with 'door stays' allowing the door to be fixed a few inches open to get a bit more ventilation while working. Near side was present but off side has gone missing. Just an 8" length of 1/4" bar screwed into a ball joint at the tethered end, and a special button fitting that engages with the door lock at the other. Zero dealer stock and anyway listed at £24 plus VAT - so make one !
6 mm ball joint ordered on eBay (£2.99) - 1/4" bar from stock as was a bar end to make the button. Simple turning and threading job had the bits ready before the ebay delivery - which was today.
I glass blasted the parts and cold blued them with 'Perma Blue' and I was impressed with the finish it gave me - not used it before - I've had it on the shelf for a while having bought it on impulse !
All bits Loctited this morning and I've just fitted them - seem to work OK and indistinguishable from the originals :clap:
In the 'parked' state the stay sits on a little clip holding it out of the way - clip was missing - also unobtainable - so I 3D printed one.
awemawson:
My long awaited parts order has arrived so work can commence.
a/ Correct flanged bolt for Thermosat housing
b/ Four Hydra Clamp seals, bolts, nuts & Lock Washers
c/ Four hydraulic cylinder seal sets to cure a few weeps
So first do the trivial flange bolt replacement - original had had to be removed with a bolt extractor and I'd temporarily substituted a normal bolt - job done.
Then paying attention to the hydro-clamps I find what appears to be a custom made extra bracket spanning between the bottom two massive bolts - can't find it on any parts listing - it'll have to come off to replace the hydro-clamps but I can't really see what it's intended purpose was - need to ask a few questions.
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