Hi all. I have an old Yale GLC050DENUAE083 S/N A823N02021T. I recently had the engine out to fix some broken motor mounts. I drained and changed all fluids while I was at it.
After reassembly, on the test run, everything worked great. Shortly after, steering became stiff, but would operate as normal if I applied slight pressure to the 4th lever (accessory not attached). After using it for a bit, the steering returned to normal. Now, it is stiff again. The other hydraulics work as they always have, pretty slow unless you rev the engine.
I have the service manual, but it is lacking (used to the Army -10, -20 manuals). It tells you to check the pressure on the inlet of the control block and that there is a test port there, but it does not show the port. I assumed that it was the smaller plug and tried testing, but never got a pressure reading unless I activated the 4th lever.
Can somebody tell me what I am doing wrong and where I can get a better manual (including the parts manual)? Thanks in advance.