tc45d will not move forward

[tc45larson]

I was mowing with my TC45D when it stopped moving. I had backed down a hill and it would not go up. It will move ever so slowly in reverse but will not go forward. It is a hydro drive transmission. Any chance this could be a cheap or easy fix?

 

[barbqranch]

Is it still at full RPMs? If the engine is barely running, it sounds like a fuel filter.

 

[tc45larson]

Yes. It was at full RPM's and was running very well. Had been mowing for about 2 hours prior to this happening. I had been backing down steep hill and was trying to get back up.

 

[jinman]

Have you checked your hydraulic fluid level? Do all other hydraulic functions work with full power? FEL? 3PH? If they are failing also, it could be a clogged main hyd filter that is starving the HST pump. It might also be a loose rubber boot on the inlet side of the pump (under the right operator's platform) that sometimes lets the system draw air mixed with fluid.

If fluid is at the right level and it is exclusively the HST operation, it could be a clogged HST filter on the left side in front of the operator's platform or a crimped HST cooler hose. This is the easier/cheaper problems. Otherwise, it might be a faulty charge pump that provides fluid to the HST or an internal HST problem. These are expensive problems.

Finally, you need to look at the bracket where your HST pedal mechanism enters your transmission housing. It's behind that big "B" shaped plate as shown in the photo below. This photo is taken from the top with the platform lifted and clearly shows the bracket. Mine is painted silver after I repaired it. You will be looking up from the bottom (with tractor not running) and you may have to move some stuff to examine the bracket. If this bracket is broken or slipping, it could be that the pedal movement is not making the input shaft to the transmission swashplate turn as it should. This is also pretty major, but not as much as splitting your tractor to work on the HST.

 

[camo308]

So, I have a TC40DA with a hydro trans. It has been acting up a bit kind of like the TC45 in this thread. It works well to start but after using it for awhile it acts like it's slipping. I tried to climb a hill and it only made it about half way then the engine RPM started dropping and the forward movement stalled. I didn't have any load on it or in the bucket. I backed down and drove it on level ground with full forward speed without a problem. It has also done a similar thing when I was using the loader moving some dirt. The forward pedal seems to stick down and when you remove your foot it returns to neutral slowly.

 

[jinman]

So, I have a TC40DA with a hydro trans. It has been acting up a bit kind of like the TC45 in this thread. It works well to start but after using it for awhile it acts like it's slipping. I tried to climb a hill and it only made it about half way then the engine RPM started dropping and the forward movement stalled. I didn't have any load on it or in the bucket. I backed down and drove it on level ground with full forward speed without a problem. It has also done a similar thing when I was using the loader moving some dirt. The forward pedal seems to stick down and when you remove your foot it returns to neutral slowly.

What range were you in and how much of a hill? I never climb any hill of consequence without being in low range. Normally low/rabbit will pull most hills. If you are in high/turtle, small hills aren't a problem, but soon you will find you are getting HST bypass/stall, which is the pressure relief inside the transmission lifting.

As far as the pedals sticking down, this is normally an example of having too low engine rpm. Keep your rpm around 2000 or higher. What happens is your rpm drops and the HST charge pump does not supply enough fluid to operate the swashplate, so it tends to stay where it is placed rather than returning to neutral. You also might improve this by lubing the roller that follows the "B" plate or adjusting the pedal return spring under the right-side platform.

 

[gould37]

I have also had several problems with this area of the tractor. I have a tc40 that will not go up slight inclines or push anything with the bucket. It seems like an issue with a seal in the transmisson. I also had the coupler between the motor and transmission strip out and cause the tractor not to move foward or reverse. If you look under the tractor and take out the front driveshaft, you can see the coupler between the motor and the transmission. The coupler joins the output shaft of the engine the the input shaft of the transmission. If the engine output shaft spins and the input shaft on the transmission does not, the coupler is stripped. To repair this, you will have to split the tractor. Be very careful when checking this and make sure you are out of gear, wheels are blocked and the brake is on. Or if you have someone to help you, spin the motor by hand and watch the shaft. Not very easy to see up in there....GOOD LUCK!!!

 

[jinman]

I have also had several problems with this area of the tractor. I have a tc40 that will not go up slight inclines or push anything with the bucket. It seems like an issue with a seal in the transmisson.

The transmission has two relief valves: 1 for forward, 1 for reverse. These valves are set to open at 5000 psi. Your dealer can run a pressure test on your transmission and determine if either relief valve is failing. There is an access panel beneath your operator station rubber pad to get to the transmission pressure test ports (shown with red arrow in the picture below). Just down and in front of the ports is a round hole where the relief valve actually is installed. The photo is with my operator platform lifted, so you'll not have a clear picture on your tractor, but at least you'll know where/what to talk about to the dealer.

 

[camo308]

Thanks, I have been running between 1500 and 1700 RPM and everything seems to be doing ok until I hit the hill problem. I'll bump it up and see if that works.

 

[Carykong]

Camo---You are running your bush hog at "full RPMs". Yet, In your following post our are running your tractor at "1500 to 1700 rpm." I think your throddle setting is way too low for just about anything. I operate my TC 35 at 2000rpm for any FEL operation and 2400rpm for hogging.