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Old 06-14-2011, 09:14 PM
shellsingleton shellsingleton is offline
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Join Date: Jun 2011
Location: Lafayette, LA
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Help diagnosing between pump or wheel motor on Ferris 3100Z?

I have a Ferris IS3100Z that's about 3 years old, 134.1 hours on it.
Has the Kawasaki 37HP motor, 61" cut. Has never seen commercial use.
Today, my left rear wheel stopped pulling. I was in the middle of cutting my yard, about 4 acres, nothing out of the ordinary for the mower.

Things I noticed:
No noticeable leaks from the hydraulic system, (hose fittings, pumps or motors). The fluid level wasn't low either.

When I push the left lever full forward, I can feel a quick taptaptap being transmitted through the lever, no strange sounds though.

When I look in the reservoir at idle, with both levers in neutral position, both pumps have return flow, but the left pump is putting out about twice the volume.

IR gun said the fluid was about 180*F a few minutes afterward, temp was taken in the reservoir. Fluid was dark, which surprised me, and made me feel stupid. The manual says to change the fluid at 250 hours but obviously mine needs it sooner than that. Had I popped the lid on it, rather than just reading the level through the opaque reservoir, I probably could have saved myself a few hours trouble and several hundred dollars.

The belts look fine. The bypass was tightened. The spindle key is not sheared.

I've pulled the wheel motor already, but I'd like to know for sure that it's the problem before I throw down $700 for a new one. If there is any other info you need, or tests you'd like me to perform, let me know. I can reinstall the motor if need be.

Thank you for your time and help,
Shell
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Old 06-14-2011, 09:35 PM
rwaters rwaters is offline
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the only way to be truly certain is to hook up a flow gage to it and see the results. Otherwise any advice is shooting in the dark and hoping to hit the bullseye. I suggest asking your dealer to see if they can help you.
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Old 06-14-2011, 09:39 PM
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weapons of grass destruction weapons of grass destruction is offline
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Location: Palm Bay FL
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Quote:
Originally Posted by rwaters View Post
the only way to be truly certain is to hook up a flow gage to it and see the results. Otherwise any advice is shooting in the dark and hoping to hit the bullseye. I suggest asking your dealer to see if they can help you.
Yes take to your local guy.
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Old 06-14-2011, 09:48 PM
shellsingleton shellsingleton is offline
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Location: Lafayette, LA
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How much should the pump be putting out?
I've got JIC fittings and gauges I can use to verify line pressure from the pump.
I don't feel like paying for labor when it's something I can do myself.
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Old 06-15-2011, 06:39 AM
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weapons of grass destruction weapons of grass destruction is offline
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Location: Palm Bay FL
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Quote:
Originally Posted by shellsingleton View Post
How much should the pump be putting out?
I've got JIC fittings and gauges I can use to verify line pressure from the pump.
I don't feel like paying for labor when it's something I can do myself.
I would move this thread to the mechanic & repair forum.
Ther are some good mower mechanics on there.
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