Question about Farmall IH Tractor 706, 756, 806, 856, 1206, ITIH32
Ensure that the port you use on the multi control valve is in the inlet port passage of the valve.
If your reservoir is lower than your pump, the pump will have to be primed. Try see into the reservoir if there is any flow of fluid when the pump is operating. One of the main causes of lack of pressure in a hydraulic system is a failed pressure relief valve. Check if there is a free flow out of the return port of the valve with the engine and pump running, there should only be a relief flow out of it - try fit the gauge to the inlet side of the valve and observe the pressure there. You can rule out the filter as a problem area.
I am not familiar with your specific hydraulic system but am conversant with much larger and more complex systems. Is it possible to isolate everything in the system bar the reservoir, the pump and the relief valve and a gauge? If you can and it builds up pressure, then you can start including systems until you are without pressure again and this will pinpoint your problem component. Alternatively, isolate systems one at a time (not the relief valve) and try locate your problem this way. I believe your system pressure should be 1600 psi.
Please come back to me with any findings or if you need more information.
Posted on Mar 11, 2011
On rear of mcv valve will be a plug that uses a5/8 wrench [only one that size] remove it completly start tractor (this is going to make a mess)see if oil sprays out of valve body if it does put plug back steering ta and brakes should work
Posted on Mar 18, 2014
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Posted on Jan 02, 2017
Tips for a great answer:
IMPORTANT: SHOULD YOUR TRANSMISSION REQUIRE REMOVAL FOR SERVICE OR REPLACEMENT, IT SHOULD BE PURGED AFTER REINSTALLATION BEFORE OPERATING THE TRACTOR.
Step 1- Place the rear of the mower safely onto jackstands on a level surface with engine off and parking brake set.
Step 2- Disengage transmission by placing freewheel control, located at the back of the frame, in the freewheeling position.
2a- Mowers with seperate pumps and wheel motors the freewheel is activated by turnign the bypass valves, one on each pump, two full turns.
The oil resevoir needs to be filled to the specifications listed in the owners manual before starting the purge procedure.
Step 3- Sitting in the operators seat(riders), start engine. After the engine is running, move throttle control to slow position. With motion control levers in neutral (N) position, slowly disengage clutch/brake pedal.
Step 4-Move motion control levers to full forward position and hold for five (5) seconds. Move levers to full reverse position and hold for five (5) seconds. Repeat this procedure three (3) times.
NOTE: During this procedure there may be some movement of the drive wheels, but they are not under load. The air is being removed from hydraulic drive system.
Step 5-Move motion control levers to neutral (N) position. Shutoff engine and set parking brake. Check and add oil as needed for units with an oil resevoir.
Step 6-Engage transmission by placing freewheel control into driving position, or by closing the bypass valves on the pumps.
Step 7-Sitting in the operators seat, start engine. After the engine is running, move throttle control to full speed. With motion control levers in neutral (N) position, slowly disengage clutch/brake pedal.
Step 8-Slowly move motion control levers forward, after the tractor moves approximately five (5) feet, slowly move motion control levers to reverse position.
After the mower moves approximately five (5) feet return the motion control levers to the neutral (N) position. Repeat this procedure with the motion control levers three (3) times.
Step 9-Your mower is now purged and now ready for normal operation.For further information or assistance, we recommend contacting your lo
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