Have a Deere 318 hydro tractor will not move seems rear is locked.Cant push with valves in. When running will not move

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Customer: Have a Deere 318 hydro tractor will not move seems rear is locked.Cant push with valves in. When running will not move but whines.Steering works as does the rear hydro cylinder.
Answered by curtis b in 5 mins 6 years ago
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curtis b
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75,202 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Did it quit under use? If you raise both rear wheels and turn one, does the other turn in opposite direction? If it does, axles and rear end are good.

Customer
No tractor was given to me not running.Yes wheels turn in oposite direction if raised but locked on thr ground.Got it running but just wines when you move the lever.
Customer
The power steering works as does the rear cylinder when its running.

So brakes are not locked, and rear end and axles check out, and hydrostat seem to work, but unit will not roll.??

Customer
Right,push valves in does nothing.Running they pop back up but no motion.

Mowers hould have freewheel lever to pull and let mower roll,does it do anything?

Customer
just two valves with lever on top of pump .Push them in does nothing.Is there another one somewhere I am missing?

I don't find any other lever listed in the parts list or my basic manual. It may not have anything else. That makes it seem like the hydrostat is not sending the power to the rear axle. But that doesn't explain why it won't roll.

Customer
I know got me stumped.The kid I got it from basicly dragged it with a car wonder if something got damaged.

It looks to me like the hydrostat needs to be separated from the rear end. The mating gear between the two may be broken.

Customer
Is that gear replaceable? Looks like 4 bolts to seperate the pump .Do I need to remove hydraulic lines?

Gear is replaceable, if it turns out to be broken. As for lines, if they are not in the way, you can leave them.

Customer
What else could be wrong? Worth taking the pump off to see.can I get any kind of manual with parts diagrams?

Deere has online parts books. Here is link, all you need to do is input model and pick the 318 mower model. Before your done, I Expect you will have transmission and rear end out of the mower.

Customer
have to get it since I cant move it at all stuck where it is.Got it for basicaly free though and want to get the front blade for it to plow snow.Worth the effort I think though.Got it running good changed points and condensor.Have mower deck also.

oK> Let me know.

Customer
Thank you at least I have some direction to go now tomorrow I will attempt to seperate the pump.
Customer
Got hydro pump out today.Rear moves freely now but output shaft on pump doesnt move gears are fine.

!! Back in town. Did you get the pump shaft out?

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