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Discussion Forum

Re: JCB 3C MK2 shuttle Pressure

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Author  [Modern View]

06-26-2012 00:16:05

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There were two models of the old shape JCB that that had shuttle shift,the early one was know as a TC,it had a manual transmission that had a high and low range,the shift levers were on top of the gearbox in the centre of the cab floor,the torque and shuttle pump was mounted on the back of the power steering pump on the right side of the engine,with that setup having the pump remote from the shuttle any place it could draw air it would so check that none of the lines have got damaged or are loose,check the suction strainer,the other model known as a Power Train had a Borg Warner shuttle,that is a self contained unit,the pump is internal and the shuttle has to be removed to access it,look under the machine,if you can see a propshaft between the axle and gearbox you got a Power Train,if you got a solid housing,axle and transmission all one piece you got a TC,both were good old workhorses.


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Bob in Mi.

06-26-2012 10:11:47

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 Re: JCB 3C MK2 shuttle Pressure in reply to AJ., 06-26-2012 00:16:05  

Good to hear from you, I believe I have talked with you before of this matter.

This tractor has the pump on the side of the engine and also operates the power steering. 4 speed gear box, no high-low.

The idea of it getting air into the system sounds like the problem, but have gone over this several times before and nothing. There are areas that are very hard to get to, loader, tractor frame, etc. but I will go over it again.

There are times that after having presure it will push air and oil out the vent which is between your legs at floor level.

I got my service manual and they spoke of Directional valve possibly the problem, not sure of that. When ever I start the tractor gear shift in neutral and shuttle lever in neutral.

I do have stupid question as no one seems to know, oil level on dipstick on full, when at temp, running, in neutral with pressure, or when cold not running?

Thanks, Bob.

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