Hydro sticking and hard to push forward tc45d

[02tc45d]

I know this is an old issue, but i think this is more than lubrication and spring tension problems. When I push the forward pedal it feels like it's sticking or locking on something.
Any input?
Thank's

 

[jinman]

With the tractor shut off, look up under the right side of the operator's platform and watch the mechanism work while pressing the forward pedal all the way forward. Release the pedal and see if returns quickly to neutral or if you have to help it return. If it returns to neutral fairly quickly, it may be that you need a little more tension on your return spring. If it is slow or sticks, it could be one of three things:

1. Lubrication - Make sure all grease fittings are greased, etc
2. Pedal return damper - This mechanism is hard to see, but it fits over behind your cruise control magnet and it could cause the problem you are having.
3. Cruise control electromagnet out of adjustment and dragging.

Your dealer should be able to fix this problem for you, but if you feel you want to try and fix it, here's an attachment that may help you. The damper is number 11 and the magnet is number 15.

Also, if you load your tractor down at low rpm, the pedals may not return. This is just a function of the way the transmission works. Keep your engine rpm up around 2000 and you should not have this problem when the engine is working under load.

 

[02tc45d]

Went out adjusted the spring tension and put alot of wd40 on the roller, started it up and looked at the hydro cooler. Yep, you guessed it leaking so i didn't get to test it out. But I had previously checked with the engine shut off and the spring came back pretty quick. Going to Mcmaster tommorrow to see if they have a cooler.

 

[kbm3]

I too have this problem on my 1520......if it is indeed the magnet, or the damper, do they need to be replaced, or is there a fix for them? I have also been plagued with creeping when in the neutral position...have adjusted this many times, and it seems to come back every time....very annoying!

 

[jinman]

</font><font color="blue" class="small">( Went out adjusted the spring tension and put alot of wd40 on the roller, started it up and looked at the hydro cooler. Yep, you guessed it leaking so i didn't get to test it out. )</font>

OUCH! /forums/images/graemlins/shocked.gif

I guess I don't know how lucky I've been to never have a problem with my hydro cooler cracking/leaking. Those guys in the shop are pretty good at McMaster. The shop stays pretty dirty, but they seem to always be helpful and they might have some suggestions on both the cooler and your pedal problems. If the damper or cruise magnet is the problem, they should be able to fix it.

I'm over 850 hr on my '01 TC45D and everything still works great. My wife has just recently started mowing with mine and loves the hydro and cruise almost as much as she likes the power steering. /forums/images/graemlins/smile.gif

 

[jinman]

</font><font color="blue" class="small">(
I too have this problem on my 1520......if it is indeed the magnet, or the damper, do they need to be replaced, or is there a fix for them? I have also been plagued with creeping when in the neutral position...have adjusted this many times, and it seems to come back every time....very annoying! )</font>

I don't know how close your 1520 is to our tractors, but on ours the damper can be disconnected at one end and checked for smooth operation fairly easily. Also the cruise magnet's air gap can be checked easily.

I think a lot of people (me included) tend to operate the tractors at low rpm (around 1500) and that is not a "happy" rpm for the NH hydrostatic transmissions. They function much better up around 2000 rpm. If you operate a lot at low rpm, you might want to get a bigger pedal return spring. That's the "fix" that NH has done on the newer tractors.

 

[mikim]

<font color="blue"> My wife has just recently started mowing with mine </font> ...oh-h-h... /forums/images/graemlins/frown.gif /forums/images/graemlins/frown.gif..I just flashed on Kathy & Bernice driving off on our tractors leaving us standing there leaning on shovels..... /forums/images/graemlins/blush.gif....I think I'm gonna be sick... /forums/images/graemlins/tongue.gif /forums/images/graemlins/wink.gif

 

[jinman]

</font><font color="blue" class="small">( <font color="blue"> My wife has just recently started mowing with mine </font> ...oh-h-h... /forums/images/graemlins/frown.gif /forums/images/graemlins/frown.gif..I just flashed on Kathy & Bernice driving off on our tractors leaving us standing there leaning on shovels..... /forums/images/graemlins/blush.gif....I think I'm gonna be sick... /forums/images/graemlins/tongue.gif /forums/images/graemlins/wink.gif )</font>

Yeah, I'm gonna complain about her taking my seat time... right after the weather cools down to the mid-80s and we get enough rain to settle the dust. /forums/images/graemlins/wink.gif /forums/images/graemlins/grin.gif

 

[jcollins]

Straight From NH Service on Operating HST's below full RPMS!
Just for informational purposes!

This concern is typically more noticeable when running below full throttle. This is due to the reduction in charge pressure, allowing the swash plate to not back off. It then places an extra load on the external pedal return spring to return the HST to neutral. By design, the HST system is not meant to be worked at less than full throttle, where maximum efficiency and control is evident. In practice, HST's are in fact operated at less than full throttle, to reduce noise primarily, but the ability to return to neutral is adversely affected.

 

[jinman]

Thanks, Jason. That confirms what I thought was true through my own experience and experimentation. /forums/images/graemlins/cool.gif