gmcbop

3 point works good, very powerful lift, the power steering and loader are weak. Any ideas? I haven't got the manual yet.

gmcbop

Update: got the service manual and got an idea to adjust the pressure relief valve on the loader controls by adding a shim to compress the spring further than the adjustment screw would let it. I adjusted it all the way last year and there was no noticable difference. I left it alone after that because it lifted what I needed. It seems to have worked as now the down pressure will lift the front end at idle. I'll give it a real test later tonite. Someday I will get a gage on it to fine tune and see if the pump is within spec.. Next I will try to tackle the hydrostatic steering.

gmcbop

Removed steering pump, measured and compared with specs. The body vs. gear width difference was .002 over tolerance. Lapped the body. The gears and bearing diameters were slightly worn but I didn't worry about them. Replaced the O-rings on the pressure relief and reassembled. The steering worked much better but not great so I added a shim to the relief spring, about .050. That was too much, when I was at full turn the steering wheel would snap back. Finally just added about .025 and it works excellent now. I can turn the wheels with the tractor stopped with no effort and at the end of the steering wheel rotation it just stops without any snapping and I can sense the relief valve is working.

bladerunner3

What part of the pump body did you lap to reduce the clearance? I have a 310 that I would like to try this with on the main pump.