Hydraulics Not Working

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mikey999
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Joined: Sun Aug 28, 2011 10:14 pm
Location: Dorset
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Hydraulics Not Working

Post by mikey999 » Sun Sep 04, 2011 11:59 am

Here are a few common problems you may find with your Hydraulics.

Firstly, the Hydraulics WILL NOT work unless the PTO is engaged (Press the clutch, then push the lever, to the rear of your left foot, mounted on a round inspection plate, backwards as far as it will go, then release the clutch, and your PTO should be spinning).

Secondly, if you are going to remove the top cover, and/or hydraulics pump, the order is as follows.
1) Drain oil (3 drain plugs underneath) or drop front tractor wheels by about 15 inches, so less oil needs to be drained. (In this case, only drain from the plug on the hydraulic pump.)
2)Remove both Inspection Covers, and PTO shaft.
3)VERY IMPORTANT-Disconnect the Control valve from the hand control fork.
4)Push control valve fully into the pump, as far as it goes. Remove bolts securing pump in place.
5)When removing pump, pull it slightly to the rear, so it avoids fouling the PTO bearing support.
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6)Remove all bolts securing top cover, and pin that connects spring to the tractor casting. (Do not remove the 4 bolts at the centre towards the front as these hold the lift cylinder in place.
7)Remove control lever assembly.
8)Lift off top cover. (Careful as it is fairly heavy.)
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If you have no lift, firstly check that any external hydraulic outlets aren't losing pressure.
Things you can check:
Relief valve hasn't worn to allow oil to escape. (Petrols relief valve is in the pump; Diesels is in the top cover).
There is enough oil in the hydraulic housing.
The lift cylinders rings aren't too worn, cylinder too scored, or O-ring/ gasket failed.
Lift pipe to top cover isn't cracked.
Pump body & pistons aren't too scored/damaged, & O-rings/ gaskets haven't failed.
Quadrant lever, and draft spring aren't out of adjustment (see instructions below).


Cheers,
Mikey

1954 TEF w/ Banana Loader, & 3 Furrow Plough
1975 Land Rover Series 3
1966 Ford Mustang
Albion 5A Binder

mikey999
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Posts: 213
Joined: Sun Aug 28, 2011 10:14 pm
Location: Dorset
England

Adjusting Control Lever, and Draft Spring

Post by mikey999 » Sun Sep 04, 2011 12:00 pm

If the spring has not been adjusted, and feels tight, then skip straight to adjusting the lever assy. If not, follow these instructions first.

Control Spring Adjustment
1)Mount and raise an implement.
2)With a Feeler Gauge, check for end play. (Desired figure is .020" )
3)If there is more or less play, lower implement, remove top link, and screw yoke in or out by half a turn.
4)Repeat until 0.020" end play is achieved.

Control Lever Adjustment
1) Mount and raise an implement.
2)Slacken the four bolts securing the quadrant to the lift cover. (The holes are elongated.)
3) Set control stop at EXACTLY 2 1/4 inches from the rearmost setting of control lever (measured
between forward edge of control lever and stop).
4) Move the lever forward until the implement begins to lower.
5) It will probably be necessary to prise the quadrant assembly gently to and fro until the implement only starts lowering when the stop is reached.
6) Re-tighten bolts.


No definition of which "implement" is to be used, but, weight-wise, i'd think the Fergy 2-furrow plough would be a good benchmark.
Cheers,
Mikey

1954 TEF w/ Banana Loader, & 3 Furrow Plough
1975 Land Rover Series 3
1966 Ford Mustang
Albion 5A Binder

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