1990s model 4630

[Sean in PA]

According to the parts drawings, those lines that go down below the engine mounted hydraulic pump are lines for the trans and hydraulic coolers.

 

[Destroked 450]

The steel lines below the engine mounted hyd pump on the left side are the hydrostatic steering line
Top 2 are from pump to orbital motor and return
Bottom 2 go to the steering cylinder
Transmission and hydraulic cooler lines are on the right side of the tractor

 

[Rob VA]

You are correct destroked 450. I think I got these filters figured out ..300 $. Later …just the outer air filter was 100 bucks . .. off subject but question for ya. I can put it in reverse let off the clutch and as I move backwards I feel like somethings trying to stop it .. but if I put both shifters in neutral and let off the brake it will roll back freely. Don’t make since to me any suggestions???

 

[Destroked 450]

Post o photo of the data tag under the hood, also could you post a couple photos of the complete tractor from the sides
Does it act like it wants to stop going forward or only in reverse

 

[Rob VA]

only in reverse

 

[Rob VA]

This is all I have right now

 

[Destroked 450]

Model code tells me would I wanted to make sure of, it is the 8x2 transmission, these transmissions rarely give problems
Tractor was built May 20, 1991, I thought the sheet metal change was later than that, but looks like I was wrong
Not sure why the issue is only occurring in reverse but look under the right foot board to see if both brake pedal return springs are in place, the springs should connect to the pedals to a bracket on the bottom of the foot board
Your left brake pedal is lower than the ride one, it should never be like that unless the brake lock is in use, in the photo yours is not but the pedal is lower. The springs hold the pedals up against a stop on the bottom of the foot board, your left pedal lower indicates the left spring is missing or stretched out allowing the pedal to drop, the weight of the pedals alone will cause the brake disc to drag

 

[Destroked 450]

A simple test is lift the pedals while reversing and see if the issue goes away

 

[Sean in PA]

I don't know if it would apply to that tractor model, but years ago a friend had a garden tractor that would bind up when going in reverse. His turned out too be something had broke in the differential lock that would jam things up when the transmission tried to drive the rear axle in reverse, but put it in neutral and it would roll backwards easily.

 

[Rob VA]

Ye I checked the springs they are there prolly wore but when I have it reverse I raised up ion the pedals to make sure they are up .no diff Right pedal has about 2 travel before it grabs left pedel has no travel. And both adjustment rods look the same on each side like no adjustment has previously been made

 

[sotxbill]

Ye I checked the springs they are there prolly wore but when I have it reverse I raised up ion the pedals to make sure they are up .no diff Right pedal has about 2 travel before it grabs left pedel has no travel. And both adjustment rods look the same on each side like no adjustment has previously been made

Should have 1 1/5 inches of play in each pedal when adjusted correctly. Left pedal too tight?????? When adjusted correctly both pedals should stop in same place, for safety reasons. So when you make a panic stop, you dont want one side to lock up early and spin the tractor left or right. Many of tractor were spun off a trailer ramp, while backing off, due to one pedal locking before the other. Had an uncle who went into the creek twice due to the right pedal locking... while working along the creek.. but it was a 9n...with split side pedals.

 

[Destroked 450]

If the springs are ok I’m not sure why the pedal are uneven, but you answered the issue
Properly brake pedal adjustment is 1 1/2-2” of pedal travel, if the left pedal has no travel the left brake is dragging
The pedals come up against a stop under the foot board, either something is bent causing the right pedal to be to high or something is jammed up holding the left pedal down
If you can’t find whats causing the uneven pedals loosen up the left brake to get some free travel and see if the issue goes away