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I have a zero turn 50 inch with a 20 horse motor hydraulics…

Customer Question
I have a zero...

I have a zero turn 50 inch with a 20 horse motor hydraulics are jerky and weak any suggestions where to start

Mechanic's Assistant: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?

Not a fuel issue a hydraulic issue

Mechanic's Assistant: Do you plan on doing the work yourself?

Yes

Mechanic's Assistant: Anything else we should know to help you best?

I have a steep grades in my yard on flat ground it does fine sharp turns and climbing hills it get weak and jerky and some cases cases stalls out

Submitted: 11 months ago.Category: Small Engine
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Answered in 31 minutes by:
7/30/2017
Technician: Curtis B., Technician replied 11 months ago
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 31,405
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

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Technician: Curtis B., Technician replied 11 months ago

Have you rplaced the drive belt from engine to the two transmissions? If it slips on grades , it will give jerky hydraulics, and with it working on flat ground, belt is a possibility.

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Customer reply replied 11 months ago
I have
Technician: Curtis B., Technician replied 11 months ago

Belt is tight? And yo say it is not oil level problem?

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Customer reply replied 11 months ago
Oil level is okay
Technician: Curtis B., Technician replied 11 months ago

oK> I will opt out, and maybe someone else will have better idea! Sorry.

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Technician: Donald, Small Engine Technician replied 11 months ago
Donald
Donald, Small Engine Technician
Category: Small Engine
Satisfied Customers: 2,501
Experience: I have 25+ years of experience repairing 2 & 4 cycle engines
Verified

Hello, my name is***** you are still in need of assistance, please let me know. I will be happy to work with you.

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Technician: Donald, Small Engine Technician replied 11 months ago

I will need the model numbers for your mower, and the brand of your mower. With this information, I can pull up a diagram of your hydraulic components.

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Technician: Donald, Small Engine Technician replied 11 months ago

Check to see if you have any obvious signs of leaks in your hydraulic system. Is the jerkiness on only one side of your mower, or on both sides? We can continue from here. Thanks!

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Customer reply replied 11 months ago
It is a Simplicty model champion zt 20h 50" b&s smi dom part#2690451 It seems to be more on the left side with the jerks and weaker but the right side in a hard pole will also jerk and his week will stall out before it spins out
Technician: Donald, Small Engine Technician replied 11 months ago

Thanks for your response. When you say "stalls out", are you referring to your engine stalling out?

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Customer reply replied 11 months ago
No hydraulics stall out it won't spin tires & the motor is not lugging at all
Technician: Donald, Small Engine Technician replied 11 months ago

Your system have a left and right side pump, and a left and right side wheel motor. If you are not noticing an oil leak on either of these four components, and your drive belt is tight enough, you may have trapped air inside your system.

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Customer reply replied 11 months ago
Okay how do I get it out
Technician: Donald, Small Engine Technician replied 11 months ago

There is a procedure call the Purging Procedure that you will need to perform, to remove the air from your system, if any is present.

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Customer reply replied 11 months ago
Can you explain how to do it
Technician: Donald, Small Engine Technician replied 11 months ago

Please click on the link below. It relates to purging your system.

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Technician: Donald, Small Engine Technician replied 11 months ago

Do you have a way to lift both rear wheel off of the ground?

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Technician: Donald, Small Engine Technician replied 11 months ago

Ok ...

You stated earlier that your fluid is at correct level.

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Technician: Donald, Small Engine Technician replied 11 months ago

Are you familiar with putting your hydro pumps in the bypass/roll position?

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Customer reply replied 11 months ago
i do
Customer reply replied 11 months ago
Can you tell me what oil it takes in hydraulics for this machine
Technician: Donald, Small Engine Technician replied 11 months ago

Most systems with Hyro-Gear Pumps, usually use 20W50 motor oil. There should be a sticker on your oil reservoir that gives the specific oil to use.

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