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Help! Bolens 1477 hydro

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IHaveTooManyTractors

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Discussion starter · #1 ·
Hello all. I need your help!

I bought a barn find 1477 a while ago and finally got time to play around with it.

Runs great but wont go up hill very well, slows down and engine starts to bog down. Funny enough reverse works awesome up hill no slowing down or bogging. Forwards is the problem.

I changed trans oil and filter with no improvement.

Can anyone think of what might be the problem? Im willing to have tranny rebuilt but I dont know if thats even possible :-(. My other bolens are hi lo 6 speeds this is my first hydro.

Thanks!
 
#2 ·
Did you check to see if the brake is dragging when
going forward but when in reverse the brake is free.
 
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Discussion starter · #8 ·
Ok so I brought the tractor down to the guy and he played around with it. Came to the conclusion that I need a new pump; he thinks the forwards gear is worn. So I asked him what he could do and he made some phone calls. All he could find was a guy that would sell me a whole 1477 with a supposedly good pump for 500 bucks. Im not buying another tractor lol my house is overflowing right now. He said I may have a chance of finding a shop that would rebuild mine but it may get pricey.

Has anyone here had this done before? If the price is worth it id rather have my pump rebuild since this tractor is in such good shape. The guy was impressed with it and was hinting that he'd buy it off my but I need the **** thing for plowing snow.

Any guidance would be appreciated!
 
#9 ·
IHaveTooManyTractors said:
Ok so I brought the tractor down to the guy and he played around with it. Came to the conclusion that I need a new pump; he thinks the forwards gear is worn. So I asked him what he could do and he made some phone calls. All he could find was a guy that would sell me a whole 1477 with a supposedly good pump for 500 bucks. Im not buying another tractor lol my house is overflowing right now. He said I may have a chance of finding a shop that would rebuild mine but it may get pricey.

Has anyone here had this done before? If the price is worth it id rather have my pump rebuild since this tractor is in such good shape. The guy was impressed with it and was hinting that he'd buy it off my but I need the **** thing for plowing snow.

Any guidance would be appreciated!
Click to expand...


Would you be willing to pull the pump?
 
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#10 ·
did your man verify the pump pressure to come to that diagnosis? what was the evidence indicating the pump was bad? if it was mine- I would remove the fender pan and observe the linkage to verify proper movement- if I recall some of the linkage on these had a roll pin at the hydro shaft- I have seen these wear resulting to lack of rotation- also- don`t forget that the further you depress that hydro pedal- the less power you have- more speed equals less power- did you try to go uphill slowly? or fast?-check first if their is slop in the linkage- i.e. the linkage at the hydro shaft rotates before the shaft itself
 
Discussion starter · #11 ·
Yes I am willing to pull the pump although im hoping to find some helpful online info ontop of all the diagrams etc I got with the tractor. I figure id have to if I take it somewhere to get rebuilt. He called me a lil bit after I got home and gave me a number to Hydrolic Solutions in Waynesburg Pa.

As far as the linkage and adjustments everything is fine. If you get on the tractor and roll your foot back on the pedal reverse instantly engages and has full strength and speed on any hill etc. If you push ahead the tractor slowly starts moving and will reach about 3/4 speed but as I said if you go up hill the engine bogs down and movement will eventually stop. My dad actually held the tractor back on a medium hill and was alarmed :-(

I used my 5x10 utility trailer to take it to that guy today and the tractor moaned going up the ramp :-(
 
#12 ·
just my two cents- you need to remove the fender -get it jacked up- rear wheels off ground- and observe very closely- the hydro shaft at bracket/linkage as you slowly move the treadel pedal-to determine if that hydro shaft is rotating properly-your not going to see that with the fender on- I am guessing you won`t get that thing fixed for less than a grand
 
#13 ·
The guy you took your tractor did not know anything about your Eaton 12 hydro, there is no forward gear to wear out, it is a hydro. You can check your pump pressure yourself by using the hyd. lift till the relief valve sounds off that means your pump is working OK. If you e-mail this guy you can get your hydro fixed, go to mrdadsr@aol.com my two cents
 
#14 ·
If the engine is loading up in forward and reverse works correctly, and it's not a brake issue, try the final drive.

Pull the hydro and rig up a hand crank to the input shaft of the final drive. Block the rear wheels and try to crank it both directions. If it climbs a 2x4 easily in reverse and harder in forward, there's a problem with the gears inside. The reduction ratio is between 30:1 & 60:1. Each turn of the crank will move the tractor between 1.2" (60:1) and 2.4" (30:1).

I have a hard time with the concept that a hydro will load up in only one direction due to internal hydro issues. The pump has the same rotation in both travel directions. Only the flow and motor sections reverse and all internal bearing loads are the same in both directions.
 
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Discussion starter · #15 ·
Ok I def had the fenders off many times after this whole issue started. Pushing the pedal in either direction equates to the pin on the side of the tranny, which is connected to the pedal by a rod with adjustment nuts on it, moving fully until the lil niple reaches the end of travel in the notch on the sliding plate when in drive. The only thing I havent done is remove the nut on that pin and try adjusting it so that it moves more either way from the slot and nipple. Im sorry if thats confusing but everything moves and stops according to the notch on that plate that matches up with the nipple when you shift from park to drive. Should I try isolating that pin from it and adjust it till it makes a difference?

Secondly the cylinder below the tractor moves appropriately and yes when you reach its limit the relief valve yells loudly.

Lastly I promise you that reverse works better and faster than even my dads toro wheelhorse loader and huskvarna hydros but forwards is horrible and the engine bogs badly. It seems like the hydro fluid has nowhere to go and builds up pressure stressing the pump and engine.

Writing this reply actually makes me want to try adjusting that pin. I know for sure somebody took that tractor completely apart and painted it. Whose to say he put the linkage back on that travel pin and set it too far back? The thing flies in reverse :-/

What do you guys think? This thing looks like it never had a full day of work, the teeth on the steering rack are brand new.
 
#16 ·
I just do not think you have a hydrostat pump issue here. you have good reverse and good lift cylinder pressure- did you jack it up and free- wheel the wheels? the eaton 12 pump is on an eccentric ring design- and if it pumps in one direction it should in both-if you are looking at the linkage part that has that notch you need to look directly at the hydro control shaft going directly into the hydro- that shaft probably only rotates 10 degrees from center both ways-not clear when you mention adjusting the pin-
 
Discussion starter · #18 ·
Yes i am going to adjust that shaft coming from the hydro slightly away from reverse and place the linkage back on and try it out. Thats the last thing I can think of since I know for sure the linkage was taken off when it was painted.

I will report my results as soon as I get them :)
 
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BOLENSBOY60
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