1998 P30 Chassis Auto Park Brake HELP!

[prayers1]

I have a 1998 Georgetown 34ft Motorhome on a Chevy P30 Chassis.
The Auto Park Brake is not holding the coach. If I put it in Park, it will still roll.

When ever I put it into Park or Drive, I can hear it cycling, but it doesn't hold back the Coach when in Park.

On a slight decline of decline the Coach will roll.

NEED HELP!!

How do I diagnosis this problem?

[Sbryant]

I had this prob. Under the coach there is a hydraulic reservoir. If it is empty fill it with any hydraulic fluid. Mine became empty because the oil pressure valve was leaking. You can buy a new one at any Chevy dealership.

[prayers1]

Thank you for the reply.
The reservoir is full. Any other ideals?

[Sbryant]

It works on 12 volt electricity - check to see if it is getting power to it - it may be a blown fuse or a tripped circuit breaker - I don't where they are. If there is no power to it, you could run another power wire to it.

[prayers1]

My version is hydraulic, off of the power steering pump.
When ever I put the Coach in gear or Park I can hear the Pump cycle. I can also pull the knob and here it cycle. The Reservoir is full and I found no leaks.

Problem- Coach rolls in Park

I did the RGS Test,
In Park, Knob pushed in - auto park lite stays on.
Put in gear, lite goes off. (Can hear pump cycle a few sec on goes off).
Put back in gear and hear something engaging.
Put in gear, apply brakes, pull knob - lite goes on and hear something engaging, push knob in and hear the pump cycling.

Could it be the Auto Park Brake drum needs adjusting. Doesn't seem so with 44000 miles, but maybe?
How do I adjust them and which way to turn the adjuster??

Any other thoughts on what to do to diagnosis this problem.

[VinceU]

Originally Posted by prayers1

My version is hydraulic, off of the power steering pump.
When ever I put the Coach in gear or Park I can hear the Pump cycle. I can also pull the knob and here it cycle. The Reservoir is full and I found no leaks.

Problem- Coach rolls in Park

I did the RGS Test,
In Park, Knob pushed in - auto park lite stays on.
Put in gear, lite goes off. (Can hear pump cycle a few sec on goes off).
Put back in gear and hear something engaging.
Put in gear, apply brakes, pull knob - lite goes on and hear something engaging, push knob in and hear the pump cycling.

Could it be the Auto Park Brake drum needs adjusting. Doesn't seem so with 44000 miles, but maybe?
How do I adjust them and which way to turn the adjuster??

Any other thoughts on what to do to diagnosis this problem.

I drove away 2X with that same setup. Smoked the brake, had to be renewed.

[Sbryant]

I had to adjust my brake, it had worn down. You just have to adjust it in one direction to see if that's the right way. If not, adjust the other way. If you can wiggle the drum side to side, it needs adjusting. It would help to raise one rear wheel off the ground with the jacks.