Tires Should tires break loose before???

[bigshovel]

Okay, rookie here with less than 4 hours seat time and no previous expierence with a hydro trans. machine except mower. Yesterday I hooked a chain to a 4" ornamental eyesore of a tree on a mound in my front yard and to fixed drawbar on tractor. I put the tractor in low range 4wd and eased into attempting to pull this tree out, throttle at 2400 rpm and slowly eased onto hydro pedal. I would have thought "note: THOUGHT" that wheels would have spun before loss of power occured. Is this normal or do I have this all wrong. My little Husqvarna 15 horse gas mower seems to have more power on the pull side of the spectrum. After the tc21d would not pull tree out I turned around and pushed it over with fel with little effort. Also my rear yard is about a 15 degee hill once 914a mmm is engaged there is not enough power
to get up hill without engine lug. This is without cutting grass yet with grass I assume this machine will stall. Again my little Husqvarna doesn't bat an eyelash at this task. Am I missing something???

Brad

 

[Matt_Jr]

I think your tires should have spun before having the engine begin to stall. I have a BX24 That has no problem spinning the tires when pulling or pushing. I live on a mountain and have a fairly steep yard and cut my grass uphill without a blink-in low range. Rarely use high. Once started to plow in high, and quickly after bogging the engine put it in low. Not once bogged it in low. Is it possible you started comming off the seat to look behind you while pushing on the throttle. Been there and done that. Athough I like having a safety there I've thought about bypassing it once or twice.
Just looked up your tractor online. Try 2600 rpm (engine rpm rating).

 

[Treemonkey1000]

It sounds like it isn't really in a low gear. Sounds like it is in a high gear for some reason. Or if it is starving for fuel? Like the air cleaner is clogged?

 

[john_bud]

You should have been at PTO rpm. Then we would know it wasn't due to lack of fuel.

jb

 

[bigshovel]

2400 rpm is pto rpm on this machine. I was absolutely in low gear.

Brad

 

[Tig]

You mentioned that you have no experience with hydro trans, so I'll try to explain hydro operation. The hydro pedal does not work like a gas pedal because it's a transmission pedal. If you want pulling power go slow. If you press the pedal down too far it's like trying to pull in too high a gear. You will bog.
I hope I explained that well enough and I hope it helps.

 

[Treemonkey1000]

No black smoke or white smoke? I just have a hard time thinking that the tranny isn't hanging up or it's not breathing right

 

[bigshovel]

No black smoke. Machine idles and throttles as it should, however under any load gross power loss occurs.

Brad

 

[Treemonkey1000]

I would think that tractor if things were working right you would not even slow down pulling that shrub out. I pulled a 800 lb log out of the woods through brush and every thing with my tractor and didn't notice any difference.

 

[Matt_Jr]

I know this is a stupid question but I have to ask. Is the parking brake set?

 

[bigshovel]

Parking brake is not set.

 

[Matt_Jr]

Have you checked the hydro fluid? My Kubota was low on Hydro fluid and front axle fluid the day I brought it home from the dealer.

 

[bigshovel]

Matt,

That raises a good point. I bought this machine in late December, I had a loader installed in February, they may have not run enough fluid through system. I'll check tomorrow.

Brad

 

[Skyco]

If the tractor is new and only has 4 hours on it you might want to hold off awhile on loading it so heavily. While it should have more grunt than you describe it really isn't a good idea to work a new one so hard until it is broken in some...my biased opinion.

 

[Nasty135]

Brad, You "should" be able to let that thing idle in low with light hydro pedal & it should pull til it loses traction, That is not working anything hard...So with the info provided it appears you have an issue with the hydro:ie bypass pressure,fluid, filters, pump. Does it whine?? when load comes on...

I don't own a hydro so I'm not an expert, I'm sure someone else will have much better insight for your issue.... Good Luck

 

[Tig]

I had a similar problem last year. Throttle was a bit sluggish and I had very poor power. No smoke, white or black. Next thing I noticed was that I also had diesel fuel in my oil. I started the tractor cold and felt the exhaust runners as they warmed up. Two runners heated up quick the other did not heat up. I was running on 2 of 3 cylinders. My problem was a stuck ring. I would think a bad injector could cause the same symptom without the fuel in the oil.

 

[dqdave1]

Take it back to dealer and have them dyno it. You may want to replace fuel filter first, to make sure it is clean.

 

[john_bud]

2400 rpm is pto rpm on this machine. I was absolutely in low gear.

Brad

Oh!

Ok, on a hydro there is a pressure relief valve that keeps bad expensive things from happening. It sounds like it is set too loose.

Can also be low fluid that Matt said, especially if you had a loader added. 4 cylinders and hoses can take up 1/2 of the tractors original fluid, but I would expect only 2 ish gallons on your sized tractor.

Next there is often a mesh screen on a return line or to the pre-charge pump. Owners manual check time! See if it is clogged with stuff.

As it's a new machine, I'd just do the middle one and if that doesn't fix it call the dealer.

jb

 

[David Cockey]

....I put the tractor in low range 4wd and eased into attempting to pull this tree out, throttle at 2400 rpm and slowly eased onto hydro pedal.... Brad

Tig probably has it right. I suspect you have confused the hydro pedal with a "gas pedal". The hydro pedal is really the gear shift. Just ahead of neutral is lowest gear, all the way forward is highest gear, with a continuous range in between. Set the throttle (which by the way actually sets the speed on the engine governer, and is not directly connected to the throttle), and move the hydro pedal just until the tractor starts to move. And then maybe another tiny bit. That should put the hydrostatic transmission in the lowest gear. Pushing down on the pedal (which is the natural thing after driving cars and trucks) just shifts the tractor into a higher gear and the tractor will have less pulling capability though go faster. So when a hydro tractor starts to bog down what is needed is to let up on the pedal, not push down on it. For more power from the engine open the "throttle" further.

Experiment with the pedal before tearing into the transmission.

 

[bigshovel]

With the groups thought's taken in, it turns out I was 1 1/4 gallons low on hydro fluid. That made a big difference. As Matt jr said his was low on front axle fluid, mine is way over filled. Will that hurt anything? Thank's for all of your reply's.

Brad