I HAVE A 1993 THOR AMBASSADOR THE PARKING BREAK FAILS TO ENGAGE WHAT WOULD CAUSE THAT? IT ROLLS WHEN ON A SLANT HAVE TO PUT BLOCKS TO KEEP IT FROM ROLLING.
Make (other): THOR
Engine: CHEVY 454
Hello , my name is JoeIf the park brake does not hold , the cable may need adjustment , or the brake shoes inside the park brake drum may need some attention. The park brake assembly is located at the tail end of the transmission where the driveshaft connects.If the auto-park actuator cylinder does not move the cable at all , then there is an issue with the hydraulic portion of the system.-Joe
The hydralic system? What should a repair cost (approximately) if either of these problems are the reason?
A cable adjustment along with replacement and adjustment of the park brake shoes could run about 2-4 hours labor , assuming no other complications arise. A set of park brake shoes and hardware could be around $75.00.The auto park brake system integrates the power steering system and the brake booster - sometimes called the hydro-boost. Hydraulic fluid flow and pressure are directed to an actuator cylinder under the coach to release the park brake. This hydraulic system can be difficult to troubleshoot and repair due to its complexity , and very few technicians understand it's operation.I would first make sure the shoes , cable , and linkage are adjusted properly. -Joe
Associates Degree in Automotive Technology , 18+ years as RV and Commercial Bus Technician