Hydraulic pump on PTO shaft problem

petegoud · Feb 22, 2009

I have a hydraulic pump which is driven off my PTO shaft to power my backhoe. I seem to have a recurring problem with the 3/4" shaft going into the PTO adaptor from the pump. It keeps loosening up, causing the pump to fall away from the PTO shaft. The two are held together with a keeper shaft and set screw. Does anyone have a solution to keeping these attached? Other than welding them together. This has happened about ten times, it's getting a little frustrating. Thanks, Doug

john_bud · Feb 22, 2009

Drill a small hole where the set screw goes in so it can go in deeper. Then use loctite on the screw.

jb

RickB · Feb 23, 2009

john_bud said:
Drill a small hole where the set screw goes in so it can go in deeper. Then use loctite on the screw.

jb

Also consider a second set screw 90 degrees from the original.

DanD78 · Feb 23, 2009

Use a long set screw and put a jam nut on the outside to clamp down on the outer sleve and put another 90 deg. away like suggested. Or cross drill and put a long bolt through both couplers. Be aware of the posibility of getting loose clothes cought on the screws sticking out.

Dan

petegoud · Feb 23, 2009

Thanks for the replies. Since the original set screw tightens on the keeper, I think I'll drill and tap a second hole where RickB and JB suggest. Then drill a small indentation in the shaft for the set screw to actually set in thereby preventing the shaft and sleeve from separating, and use some Loctite this time.