MF50 First problems, Power steering.
Posted November 24, 2010 - 04:18 PM
I noticed the other day on our virgin flight that the steering was very difficult. I checked the fluid today and it was at the full mark. I diceded to Play, I mean work the tractor, so out into the woods we go. I do a little clean up of a fallen hickory tree. After about 5 minutes my arms are give out from fighting the steering.
The steering wheel will turn fine for about a half turn then its both hands and my back doing the work. I also noticed that fluid was being forced out of the power steering resaviour. A gasket has been installed in the top of the res and there is a 5/16 bolt holding the top down. There is a filter in there but it looked ok.
So is my steering pump having problems or do I just need to bulk up?
Here are some pics of the pump.
Posted November 24, 2010 - 06:13 PM
Under "Loss of Power Assistance"
binding/worn/bent mechanical linkage
low pump pressure
faulty or improperly installed valve thrust bearing
valve thrust bearing nut not tightened correctly
sticking or binding spool valve
faulty valve plungers or springs
pump to valve hose lines reversed
wrong fluid in system
internal leak in valve
it mentions a check valve in the troubleshooting list, but I'm pretty sure the MH50 & MF50 didn't have those check valves. It's why they say not to turn the wheel when engine isn't running.
It warns against turning the steering without engine running (fluid loss)
I'd start by draining the system completely and refilling with ATF type A (as spec'd in the manual) Total capacity is 2/3 qts
I can't express how dangerous this system is without the right test equipment.
You're dealing with pressures in excess of 1000 lbs.
Please be careful.
The ones in Italics are where I'd start looking. Hoses are a visual. I will try to get decent pic of that page specifically.
It's at this point, I need a serial #... they used 2 different PS valves in those, pre #x, and post #x.
Edited by MH81, November 24, 2010 - 06:19 PM.
- NUTNDUN and coldone have said thanks
Posted November 24, 2010 - 06:43 PM