Jd 665 zero turn pulling to one side

[750JDLA421]

Have jd 665 zero turn 2013 great mower best cut I’ve ever had by far. Starting to pull harder on one side than the other. Tried to adjust the screws under handle no change the hydraulic pump wines when fluid is full drive belt doesn’t seem worn any ideas on wher to begin ?

 

[beenthere]

Hyd fluid full?

Time for filter and fluid change?

just guessing.

 

[seville009]

Make sure your tire pressures are up/equal.

 

[ROUSTABOUT]

It ain't one pulling more. It's one pulling less. I don't know if you have drive units or separate pump and drive. It it's a unit, time for a new unit.

I wouldn't go through JD, they didn't build that mower. Try to shop around. I love to beat the system.

 

[workinonit]

I've never heard of a JD 665 ZT mower. Anywho, there are adjustments on the sticks but that is usually just to get the sticks even when traveling in a straight line.

 

[beenthere]

There are two hydraulic pumps and drives.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/73115/referrer/navigation/pgId/2724888

 

[artfull dodger]

Try changing the belt before panic sets in. In 30 years of turning wrenches professionaly, I have seen lots of ZTR's with twin seperate hydros have this issue due to a worn belt and it always only really affects one side, not both It wont look worn to the naked eye when just looking under it. But the belts get glazed and stretched, which will cause the belt to slip some as it goes around the pump pulley. Make sure to use OEM belts from JD, JD uses a belts with unique cross sections that fit the pulleys, also unique to JD. Their way of making you pay the piper for parts. Go thru one of the online dealers for OEM JD parts. If that does not solve the problem, then you might have one hydro going south, but start with the belt.

 

[seville009]

Try changing the belt before panic sets in. In 30 years of turning wrenches professionaly, I have seen lots of ZTR's with twin seperate hydros have this issue due to a worn belt and it always only really affects one side, not both It wont look worn to the naked eye when just looking under it. But the belts get glazed and stretched, which will cause the belt to slip some as it goes around the pump pulley. Make sure to use OEM belts from JD, JD uses a belts with unique cross sections that fit the pulleys, also unique to JD. Their way of making you pay the piper for parts. Go thru one of the online dealers for OEM JD parts. If that does not solve the problem, then you might have one hydro going south, but start with the belt.

Good idea.

Probably a way to test the belts first is to swap them and see if the problem moves to the other side.

 

[artfull dodger]

When the belt is off, make sure the pulley is tight on the input shaft of the hydro unit. Seen a few come loose and it would work when cold, but once the pulley got hot, it would slightly spin on the input shaft as the splines were worn from being loose. It never made any noises like something was loose.

 

[Richard001]

Make sure to use OEM belts from JD, JD uses a belts with unique cross sections that fit the pulleys, also unique to JD. Their way of making you pay the piper for parts.

Hard to believe that the belt maker only makes belts for one customer. That would severely limit the manufacturer's profits.

There must be another source of the belts.

 

[MF243RedTop]

If you have a bad pump, it may be a hydro gear pump... They're a fairly simple rebuild.. price of new ones can be $$$ and aftermarket aren't reliable..

 

[artfull dodger]

Not really, Simplicity is the same way. For Simplicity its not the angle of the V in the shape of the belt, but the make up of the belt. They commonly had very twisting mule drives to the mower decks that put extra stress on the backbone of the belt internally. Run a standard or even a Kevlar belt from Rural King ect and it does not last. Run OEM Simplicity and lasts many seasons. Same for Ma Deere, between double V used on may of the ZTR mower decks(and some newer tractor decks), to the make up and shape of the belt. John Deere is SUPER protective of anything that deals with their machines, be it the lowly lawn tractor or the million doller combine. You can get away with non OEM belts on both, but the non OEM will not last as long and some are a total pain in the ass to change. I would rather spend the $$ on OEM vs be laying in the grass changing a broken or shredded belt. For some, down time is not a big deal. But to others it gets into how much $$ they made that day. Been wrenching on them professionaly for over 30 years, including at both a JD and a Simplicity dealership. Certified master tech till about 6 years ago when I went to work at the local auto factory for the pay/benefits package.