Bobcat T110 - Hydrostatic Pump/Motor issue?

[runnerb03]

I purchased a used Bobcat T110 used a few years back, only had 700 + hours on it. Talking to the Bobcat dealer had been in for service not that long before I had bought it. From the get go the left side was always weaker than the right, it didn't want to move as freely and you could hear that side strain but it didn't hamper what I was doing since I wasn't pushing it hard. Recently I was pushing brush and the drive belt broke. I replaced it with a new one and the Bobcat started up fine. I increased the throttle to start moving and everything seemed normal/engine was normal. As soon as I pushed manual joysticks forward to drive the engine started sounding like it was straining pretty bad. My knee jerk reaction was to pull the throttle back and kill the engine so nothing would get damaged. Do the brains on this forum think there was something else that killed the drive belt? Could there a more serious hydraulic issue or something else? Please lend me some knowledge, thank you.

 

[runnerb03]

UPDATE - I tried starting it today and the engine is struggling from the get-go. Do y'all think it could be a hydrostatic pump killing the engine?

 

[Bswwood]

UPDATE - I tried starting it today and the engine is struggling from the get-go. Do y'all think it could be a hydrostatic pump killing the engine?

You could have a pump issue, couple things to check you said you have manual steering, are they centered or do they try to drive against the brakes when you start it? Is it possible that your auxiliary hydraulics are trying to operate? Do you have power bobtach? You can also remove your drive belt start the engine and see how the engine runs without the pumps attached.

 

[runnerb03]

You could have a pump issue, couple things to check you said you have manual steering, are they centered or do they try to drive against the brakes when you start it? Is it possible that your auxiliary hydraulics are trying to operate? Do you have power bobtach? You can also remove your drive belt start the engine and see how the engine runs without the pumps attached.

The sticks feel about where they usually are. I am not sure how to check if the auxillary hydraulics are trying to operate. There isn't anything hooked up to it other than a bucket. The machine does not have a power bob-tach. I do wonder if like my generator if you run the engine with zero load it can get damaged. It would be a good experiment to see if it is the engine that is the problem. I am still leaning towards the hydrostatic pump being the culprit. Again the first symptom was broken drive belt. After replacing it the engine started straining when the right joystick was pushed. The last starting attempt the engine sounded strained and just died. Unfortunately the schematics are kinda beefy, I wouldn't be able to easily figure if it was the left/right/gear pump that is directly tied to the engine that is killing things. Or what. I also checked to see if any codes were posted, looks like nothing is detected. On a side note the Bobcat is currently dead in the woods and has been seeing some rain. I noticed under the engine there is a little bit of standing water. Does anyone know if there is some sort of drain hole for this thing?

 

[Bswwood]

The sticks feel about where they usually are. I am not sure how to check if the auxillary hydraulics are trying to operate. There isn't anything hooked up to it other than a bucket. The machine does not have a power bob-tach. I do wonder if like my generator if you run the engine with zero load it can get damaged. It would be a good experiment to see if it is the engine that is the problem. I am still leaning towards the hydrostatic pump being the culprit. Again the first symptom was broken drive belt. After replacing it the engine started straining when the right joystick was pushed. The last starting attempt the engine sounded strained and just died. Unfortunately the schematics are kinda beefy, I wouldn't be able to easily figure if it was the left/right/gear pump that is directly tied to the engine that is killing things. Or what. I also checked to see if any codes were posted, looks like nothing is detected. On a side note the Bobcat is currently dead in the woods and has been seeing some rain. I noticed under the engine there is a little bit of standing water. Does anyone know if there is some sort of drain hole for this thing?

At this point it sounds like you're driving against the brakes when you're trying to start it, if the steering is not centered on the pintle shaft then the motors will try to turn and drive against the brakes, try to move your steering one way or the other while trying to start it and see if you can get it to move around and turn your brakes off. If you get to that point let go of your sticks and see if it tries to drive by itself.

 

[Bswwood]

At this point it sounds like you're driving against the brakes when you're trying to start it, if the steering is not centered on the pintle shaft then the motors will try to turn and drive against the brakes, try to move your steering one way or the other while trying to start it and see if you can get it to move around and turn your brakes off. If you get to that point let go of your sticks and see if it tries to drive by itself.

And also earlier I mentioned removing your belt, I was talking about your main hydraulic drive belt and see if the engine starts and runs without any issues