MF 65 Hydraulic Pump Rebuid

[Jeff Ziegler]

Time to rebuild the pump. I now I have to drain the transmission with the rear most plug and pop off the seat cover.

But does the PTO shaft have to be removed? Should I replace the PTO shaft seal at the same time? Or are the couplers on both sides of the pump that just have to be moved to one side?
 

[DavidP, South Wales]

Hi Jeff,
You will need to remove the PTO shaft so that the pump can be moved rearwards to disengage the front coupler and then lifted out rear-end first.
It would be a good time to replace the seal.
DavidP, South Wales
 

[Jeff Ziegler]

Does the main drive shaft come out? Or will the pump fit by it side ways?
 

[DavidP, South Wales]

Hi Jeff,
Yes, it will be necessary to remove the splitpin from the sheartube and move the tube forwards onto the shaft. Then move the shaft rearwards to disengage and remove it. When refitting choose a splitpin hole that gives the least end-float but no load.
DavidP
 

[Ray UK]

All good advice re removing the pump.

David - just out of interest have you ever seen on of these shear tubes actually break? I worked for an MF dealer here in East Kent for 6 years, in that time I removed many of them for various reasons but as far as I can remember they were all in one piece.
Ray.
 

[DavidP, South Wales]

Hello Ray,
In my 40 years of MF experience I would have to say that I haven't actually seen one break either. I have had several where the splitpins have worn away, dropped out and disengaged though.
It is there as a safety device but in saying that it only shows what the tube and transmission is capable of withstanding.
You might have heard of the book Inside Massey Ferguson written by ex-MF Service Dept and Technical Author David Walker. Out of curiosity I will send him an email for his experience in this and post back.
DavidP, South Wales
 

[Jeff Ziegler]

I got S.40843 installed but am unable to tighten the bolts and still have the shaft turn freely? The piston blocks will rock so I am pretty sure it is the brass blocks are binding. Is this normal and I should let the engine fix it? Or do I need to send it back? The middle fork moves just fine.

Does Sparex have a help line?
 

[WellWorn]

David P, in only 8 years of owning a MF65, I can say that I have seen a drive coupling broken. To do it, you put a novice clutch user on the seat, have it in low reverse with the A4-203 at about 900 RPM, and while she is afraid to let off the brakes (both of them) on a very slight grade (that levels off within 10') she then pops the clutch.

The good news is that it offered the opportunity to get into the 65 to do some other much needed work, like rebuilding the hydraulics. The other good news is that she later greatly improved clutch techique on our other red tractor: the lil' old worn out (not enough power to destroy itself) SA.