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DDG
DDG, Service Coordinator
Category: Heavy Equipment
Satisfied Customers: 104
Experience:  2 years Truck shop experience, 12 years of Bobcat Compact Equipment experience
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Bobcat: park brake..right track is locking when trying to drive

Customer Question

we have a T200 track bobcat. we just got park brake "fixed". now the brake on right track is locking when trying to drive. we disconected park brake toggle switch, changed control panel and switched around relay switches to no avail. any ideas?
Submitted: 3 years ago.
Category: Heavy Equipment
Expert:  DDG replied 3 years ago.

Both the left brake, and the right brake, are controlled by the same brake valve, so if only one is locking up, I suspect a problem with the brake in that motor.

 

Test the pressure on the line supplying that brake. There should be 400-420 psi at high idle.

 

Use a port-a-power to pressure test the brake in the motor to see if it is leaking. Pump it up to about 450 psi and it should hold pressure. If not, the brake piston is leaking.

 

 

 

Follow all Safety and Maintenance Procedures as illustrated in the Operation and Maintenance Manuals for your machine! Remember to click ACCEPT.

DDG, Service Coordinator
Category: Heavy Equipment
Satisfied Customers: 104
Experience: 2 years Truck shop experience, 12 years of Bobcat Compact Equipment experience
DDG and 6 other Heavy Equipment Specialists are ready to help you
Customer: replied 3 years ago.
the mechanic says it is not that problem. I would like to disconnect the park brake altogether as this problem started after it was fixed. can you tell me how to do this?
Expert:  DDG replied 3 years ago.

There is no way to bypass the brake system, and I wouldn't advise doing something as unsafe as that if there was.

 

Each motor has a park brake that is spring applied, and uses pressure to release. What were the pressure testing results for each motor brake?

 

Are you sure the problem is the brake, or is it a problem with the motor or the hydrostatic pump for that side? Tee a gauge in with the motor brake line. Is pressure always available to the brake while running the travel functions?

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