How does this Hydraulic winch work then?

[Dave177]

Hi all,

Picked this hydraulic winch up last week and managed to get it inside today and take a look.

All of the other hydraulic winches that I have seen/used have a tow way motor and 2 hoses, however this one has three, any ideas how it would be setup?

 

It was to replace another I have for the front of the tractor, current setup goes in to the rear spool valves and in/out is controlled off of the levers in the cab and would like a similar setup with this one if possible?

 

Thanks

[Robert_S]

Ive never seen that either, A return to the tank? They are usually bigger though.

[woody paul]

The only hydraulic motors I now of with 3 Pipes are on hedge cutters but the 3rd pipe is a small blead back pipe.

[twistedhicap]

The only hydraulic motors I now of with 3 Pipes are on hedge cutters but the 3rd pipe is a small blead back pipe.

 

Seen lot like that on root crop machinery small leak back/ blead pipe

[difflock]

(i) It Looks like Poclain track motor turned into a winch.

(ii) I can only imagine the third top mounted pipe is indeed a bleed off pipe.

Connect the other two "paired" pipes to the spool connections and see what happens, it should obviously turn in either direction dependant on oil flow direction, place the open end of the presumed bleed off pipe in a 20 l jar just in case.

Hmmm?

Not perchance a hyd speed control function, acting on the swash plate angle, this should only need a single pipe, I imagine.

but, if indeed it is, the motor should still work, at I am guessing, its slowest speed:confused1:

Edited January 31, 2015 by difflock

[Agi-Smash]

Either case drain or a load sense line

[openspaceman]

(i) It Looks like Poclain track motor turned into a winch.

(ii) I can only imagine the third top mounted pipe is indeed a bleed off pipe.

Connect the other two "paired" pipes to the spool connections and see what happens, it should obviously turn in either direction dependant on oil flow direction, place the open end of the presumed bleed off pipe in a 20 l jar just in case.

Hmmm?

Not perchance a hyd speed control function, acting on the swash plate angle, this should only need a single pipe, I imagine.

but, if indeed it is, the motor should still work, at I am guessing, its slowest speed:confused1:

 

It looks like a bi directional swash plate piston pump to me. AFAIK all reversible motors have a separate drain because the drain (for leaks past the piston and possibly lubrication of the rotating swash plate) must be at lower pressure.

[Breezeblock]

2 on the ned are direction and the one on top is case drain

[Kevm]

Its a case drain so any leakage past the pistons comes out there and should go straight back to tank.

take the fittings out and have a look inside the ports to see how clean they are - I hate to see open pipes for all sorts of stuff to get in.

That angled piston motor should produce plenty of torque if it is good, if you get it connected up and can rig some sort of load on the drum then see how much oil is coming out of the drain, more than a couple of litres a min means the motor is worn out.

[Breezeblock]

if you don't have a return to tank line you can fit a tee check valve and return it thru one of the direction hoses