General Boards > Technical Support
Pac Brake not moving
Gerald Farris:
There are several lubrication points on a Pac Brake cylinder and linkage that might help your problem. Be sure to use synthetic oil because of the heat. Pac Brake sells their own oil or you can use an equilivent engine oil.
Gerald
Joel Ashley:
HiLarLee-
Your model may be enough unlike mine that the specifics I gave aren't germaine to your rig. You should really use your wiring diagram book if you have it, as mine has a page specifically dedicated to the exhaust brake wiring. If it is still legible and intact, you will also find useful the 12v electric component legend that is hopefully still glued to the inside of the electrical bay door. The relays in the book and on the legend sheet are designated by the letter "K".
But from what you said, and given the fairly clean and solid connections in the bay, I'd spend my first efforts on the mechanical parts rather than the electrical. If the linkage is free and operational, then maybe check the solenoid ground. The dash lamp I mentioned has its own ground, so as long as current could flow in the wire (my #204) that it splices to, it would light up even if the solenoid the wire goes to had a weak ground or other issue. I'm not sure what kind of solenoid it is, but in my day I've seen even the veritable old "Ford" type of solenoids give up internally (corroded, burned points), so reckon that's possible in your case too. As noted above, however, that wouldn't be my first bet.
Larry and Heidi Lee:
Hi Joel and all, I ordered a 05 Monterey wiring diagram from Beaver for $55.00 and to my dismay it is incomplete in many areas and does not have the e-brake circuit. I agree with you my problem is most likely mechanical and will let you know. Why does it have to be in the 100's this wekend? :o Why can't I live in Bend Oregon? :P
ps: I hear you loud and clear about $15 solenoid failures in general. The ignition solenoid failed in my coach last year and I lost all power while coming off a freeway off ramp! I went with a solid state electronic solenoid replacement.
Larry and Heidi Lee:
Geez Joel thats an awful nice offer from you. I would be really grateful if you can send what you have to: llee@tigertechinc.com
I checked the inside door of my electrical compartment but I find no schematic.
Larry and Heidi Lee:
I located the Pac brake air solenoid buried towards the front of the small engine access cover in front of the rear bedroom wardrobe closet. Following the airline it was hanging by a couple nylon zip ties. I was pleasently surprised to find I could disassemble the solenoid and found some corrosion on the plunger shaft. I cleaned it up with a little WD-40 and now it works as it should. Finally I have exhaust brakes! I made a bracket and relocated the entire assembly so it is easily accessible. I also pulled all the wheels and drums (I recommend two people for this) off and found the rear drums had heat cracks so I picked up two brand new drums at a local NAPA for $220!!! :) Brake shoes were 90%. Oil and fuel filter changes, new 6V batteries (Costco $70 each) and I'm ready to go again.
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