When I worked for Eaton, we made steering valves for thwaites dumpers, on ours the front seal end was removable via a snap ring making a seal change an easy 3 minute job.My Thwaites 2 ton dumper has been leaking for a long time from the 'steering valve'. It's not the original valve but one I rescued from a 'Bank Mower' that I scrapped. Same fittings and mountings but the swept volume doesn't match the steering ram resulting in MANY turns from lock to lock - but heck it works. The leak is from the upper central shaft seal and i annoying rather than debilitating. Slowly but surerly oil leaks into the steering column itself and back out as the column isn't sealed to it's mounting flange.
The proper solution is to strip the unit and replace the seal but life is too short and I'm still hoping to find a proper ex Thwaites dumper steering valve!
So today stripped out the unit from it's mountings, made a few measurements, I fired up autocad, draw up a flange gasket, ported the DXF to my laser cutter, cut a gasket, dragged out an old tube of Blue Hylomar and stuck it all back together.
Early days but so far no leak - I'll wait for the oil to come out of the top of the steering column but I don't think the leak is on the pressure side so it should only fill up to the level in the hydraulic reservoir !
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Go to parts.jcb.com and put in the VIN number, you'll get the part number then. Invaluable I've found.When I can get through to the parts place to confirm the part number I'll order one up, but so far they're always on the phone
Not that at all. All the good stuff in rubber of olde isn’t allowed any more. Tom, runs a rubber molding company .Good customer of mine and a good mate is constantly on about the hassles with the supposedly same rubber compounds that he’s used for years being about as useful as a chocolate teapot. All down to what they have taken out ,but the compound designation stays the same..which it’s not.Steering rack gaitors are a service item every two years on my Caterham for the same reason - no idea where they are made, but wherever it is, they obviously don't consider the effects of UV . . .
Not kin funny in this heat
Hoping to get your stump ground tonight then?Had a week of spannering/maintenance with me and my mucker .
Today. SWMBO `s uj, trenchers oil change +service, stump grinderx2 oil change +filters +grease , chippers x2 blade change, oil change+ filters +grease and Ford Ranger clutch bleed+adjust + new rear light unit. Not kin funny in this heat
Bob
Hoping to get your stump ground tonight then?
Yes I have my JCB 3CX registered on the JCB parts site can find part numbers that way, but I also have the 'user' parts book (which has pictures but only drawing refs no part numbers) and the 'workshop' parts book that has the lot. Mind yuo I tend to buy parts from Simon Vicary rather than JCB itself.Go to parts.jcb.com and put in the VIN number, you'll get the part number then. Invaluable I've found.
Looks like a Danfoss, the other main manufacturers were Ognibene and Rexroth, who bought out out Hydraulik Nord after the wall came down.Not sure what make this one is - I'll see if I can read it's plate with a mirror but location isn't ideal for this !
Be very nice if the seal CAN be easily changed.
Glad I'm not the only one suffering.
It is 20 here already at 8.30am. I blame @Gragson as it is usually the chillier side of warm and I told him to bring a jumperA mild 31° with clear skies forecast today