An experienced non-professional tracor mechanic disconnected and repaired the FEL on my B7200 HST (the FEL frame was bent). After reconnecting it and adding hydro fluid he says there is no hyd pressure to the loader and he has no idea what's wrong. The hyd pump is working (the tractor runs and drives fine). Any ideas?
Reconnected front end loader--no hydraulic pressure--why?
- Thread starter Orange Pete
- Start date
Welcome to OTT,
The pump that operates the remote hydraulics like the 3PH and FEL is different from the HST (hydrostatic transmission), it's driven directly off of the crankshaft of the engine.
But, as stated abive check that all the QDs are seated. Doe the engine lug down at all when you move the joystick? Does the 3PH work?
rbargeron
Well-known member
Lifetime Member
Equipment
L5450, L48, L3250, L345 never enough attachments
Check the hydraulic block - maybe the diverter valve was turned to shut off flow to the loader while it was removed
Thanks for the tips, folks.
Checked these things with the mechanic while looking at and running the tractor engine today:
The quick couplings are connected correctly. One is male, the other female. Both come apart and go together solidly and completely.
With the engine running and moving the joystick, taking off a coupling and jamming a screwdriver into the pump-side of the coupling (to open the coupler valve) produces no fluid. (Hyd system has been topped off with fluid.)
BTW, with FEL hoses connected, no change to engine speed when moving joystick. The 3PH doesn't work either.
The mechanic fixed the frame of the FEL, but he also did some metal heating and bending on the tractor brackets that hold the FEL--including one close to the hyd pump on the right lower side of the engine (driver's perspective). I was wondering how removing and reinstalling the FEL could affect the hyd pump and maybe that is it...hmmm.
We did not check the diverter valve on the hyd block as suggested by RBergeron--will do that next.
If that's not it we will try is to see if the hyd pump is getting drive power, and if it is, what else might be wrong with the pump.
Unless someone has another suggestion...
Many thanks,
Orange Pete
Checked these things with the mechanic while looking at and running the tractor engine today:
The quick couplings are connected correctly. One is male, the other female. Both come apart and go together solidly and completely.
With the engine running and moving the joystick, taking off a coupling and jamming a screwdriver into the pump-side of the coupling (to open the coupler valve) produces no fluid. (Hyd system has been topped off with fluid.)
BTW, with FEL hoses connected, no change to engine speed when moving joystick. The 3PH doesn't work either.
The mechanic fixed the frame of the FEL, but he also did some metal heating and bending on the tractor brackets that hold the FEL--including one close to the hyd pump on the right lower side of the engine (driver's perspective). I was wondering how removing and reinstalling the FEL could affect the hyd pump and maybe that is it...hmmm.
We did not check the diverter valve on the hyd block as suggested by RBergeron--will do that next.
If that's not it we will try is to see if the hyd pump is getting drive power, and if it is, what else might be wrong with the pump.
Unless someone has another suggestion...
Many thanks,
Orange Pete
An update: the pump shaft end is toast--was partially sheared from prior issues, and mech did not know about the diverter valve, which finished it off. I think I am looking at a replacement hyd pump, $470. Thanks for reading and the advice.
Thanks for reporting your findings,others may find this helpful.
Hope you can find a pump for a decent-er price.