jd 350

chuck 350 jd · Post by **chuck 350 jd** » Sun Apr 19, 2015 7:16 pm

Subject:jd 350Hi everyone
I have a jd 350
It turns fine in reverse. But will not turn going forward.
It pushes good to.
Clutch works good an brakes are good. Like I said it will not turn going foward.
Could someone tell me whats wrong please.
Could someone please tell me the year of my 350
T4F3D
047779T
Thanks for any help

Post by **Lavoy** » Sun Apr 19, 2015 8:34 pm

Well, the clutches don't work good or it would steer. I would guess steering clutch adjustment or repair is needed.
Lavoy

jtrichard · Post by **jtrichard** » Sun Apr 19, 2015 9:07 pm

Welcome to the nut house lets start..... If you sink the blade in the ground to a point that the Dozer stops moving (but does not die) are the tracks both spinning? if YES then Both clutches are holding ... if not than one or both are slipping.... .IF you pull back on BOTH levers at the same time does the tractor stop moving forward? .. if you pass both steps then your brakes are out of adjustment OR have oil on them.....

chuck 350 jd · Post by **chuck 350 jd** » Mon Apr 20, 2015 8:58 am

Thanks I will let you know

Stan Disbrow · Post by **Stan Disbrow** » Mon Apr 20, 2015 12:44 pm

Hi,

The way they work, is the power out of the transmission heads to a ring and pinion gearset. Where they differ from everything else, is No Differential. Full power out both left and right sides always.

From there, power goes to a clutch pack. This for each side. Once thru the clutch pack, to another pinion gear, then to a bull gear, then out to the sprocket.

The steering lever first disengages the clutch pack, cutting drive power to that side. Then, and this is timed mechanically inside the upper part of the final drive housing, the lever applies a brake band wrapped around the outside of the clutch pack housing (looks like a drum).

The first thing that may be wrong is the clutch pack may be rusted together. The pack is a series of interspaced fiber and steel discs. Rust on the steels from sitting too long has too much friction. This might work free.

The second thing is either water or oil will swell up the fiber discs. This cannot work free from running it.

The third thing is something broken in the linkage between the lever and the throwout bearing. Like maybe a bearing in little pieces, or a busted pressure plate finger.

I have seen where the clutch releases, and the brake won't work and folks think it that side is still under power when it is actually freewheeling. The tests JT mentions are meant to help figure these possibilities out.

Other things could be wrong, but those usually lead to no power on a track and a continual slow turning towards the side with no drive as the track drags the ground somewhat.

Stan

Tigerhaze · Post by **Tigerhaze** » Mon Apr 20, 2015 1:54 pm

chuck 350 jd wrote: Could someone please tell me the year of my 350
T4F3D
047779T
Thanks for any help

It should be a 1967 Straight 350 (between S/N 42485 AND 64992)

chuck 350 jd · Post by **chuck 350 jd** » Fri Apr 24, 2015 3:53 pm

jd 350Ok did your test. It will turn fine in reverse. But will not turn going forward. If you pull both levers back it will cost like going down hill. But when you hit the foot brake it will stop. It doesn't die when you push up against a stump.
It seems like everything is fine except for turning going forward.
Thanks for any help

jtrichard · Post by **jtrichard** » Fri Apr 24, 2015 4:24 pm

you said it dont die when pushing stump or something that wont move but are the tracks spinning?....if you pull both levers back on flat ground it should NOT move

chuck 350 jd · Post by **chuck 350 jd** » Fri Apr 24, 2015 5:11 pm

I was on a hill when I pulled both levers an it started coasting and I hit the foot brake and it stopped. Im not sure if I would have pulled harder on both levers if it would have stopped it . An yes both tracks were spinning when I was trying to push the stump over It works great all the way around. Except for turning going forward.
Thanks

chuck 350 jd · Post by **chuck 350 jd** » Fri Apr 24, 2015 5:24 pm

I ordered a manual. Waiting for it to get here. so I can learn how to adjust the clutches and the brakes.
But with it turning good in reverse. just thought it should turn good going forward to.

jtrichard · Post by **jtrichard** » Fri Apr 24, 2015 5:32 pm

hopefully adjustment and not oil on bands

Stan Disbrow · Post by **Stan Disbrow** » Fri Apr 24, 2015 5:50 pm

Hi,

The foot brake applies the same brake bands as the steering levers. Only both at once. It has more motion than the levers do.

The steering lever brake adjustment is a tad too loose fom the sound of it.

The force from the drum direction is pulling the band tighter when in reverse, so a proper adjustment ought to straighten it out.

Stan

chuck 350 jd · Post by **chuck 350 jd** » Fri Apr 24, 2015 5:58 pm

Thanks for your help. This site is great.

jtrichard · Post by **jtrichard** » Fri Apr 24, 2015 8:05 pm

OOPS i missed the part where you said it does stop with the foot brake... sounds like linkage adjustment as STAN said

Blidzy · Post by **Blidzy** » Tue Apr 28, 2015 8:44 pm

I have a 350 also and was having the exact same problem. It seemed to steer some better after adjusting and steered fairly well when pushing a big load or going up a steep hill. Didn't steer well at all down hill. Steered like crazy in reverse. Had an old drunk wonder by one day while i was trying to work. He told me he had worked heavy equipment his whole life. He said after awhile "that don't steer worth a damn in forward, does it?" I was shocked and answered that it didn't. He told me my tracks were to loose, adjusted the tracks and it steers fine now. Thank goodness for old drunks.

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