Manual hydraulic pump rebuild

[BuiltMFG]

Anybody done this yet? Mine seems to be leaking on it's own and has never worked.

 

[brianhk91]

I rebuilt mine about 2 years ago due to leakage around the pump shaft, but it still pumped fine until it ran out of fluid. Being yours doesn't pump it could be as simple as cleaning it up since the ball bearing check valves have to be clean to seal. All I did was replace o rings using a generic buna-n o ring kit. The pump is an SPX power packer. I attached a diagram that I found helpful.
View attachment 744418

 

[Ronmar]

I rebuilt mine about 2 years ago due to leakage around the pump shaft, but it still pumped fine until it ran out of fluid. Being yours doesn't pump it could be as simple as cleaning it up since the ball bearing check valves have to be clean to seal. All I did was replace o rings using a generic buna-n o ring kit. The pump is an SPX power packer. I attached a diagram that I found helpful.
View attachment 744418

when I tried to look at your attachment, I got an "invalid attachment specified" fault...

 

[Keith_J]

Look for corrosion on the piston. The chrome plating is thin and soft. And it traps corrosive rain water, salt and trash.

 

[brianhk91]

Newbie mistake here....I tried to attach a pdf earlier (no can do). I converted the document to a JPG but it lost the text that labels the parts in the process. Thanks Ronmar for letting me know the attachment failed. You can google "Installation and Service Manual Hydraulic Cab Tilt System" and it will get you the whole document. Some details can be different between military and the commercial system like reservoir size, operating pressure, and etc,
In

 

[BuiltMFG]

Link to full document, thanks for the intel brianhj91