M923A2 (M939A2) parking brake lever issue

[Alexsha]

After reading through the -23 manuals for parking brake adjustment, I'm still a bit confused with an issue I'm having. My parking brake lever correctly engages the brakes when pulled up. When I push it down, it disengages the brakes, but will not stay down parallel to the cab floor. It springs back up 30* or so. It does not re-engage the brakes, but by the diagrams in the manuals, it should stay down on the floor. I'm thinking the spring is caught or rusted, but I can't quite tell without taking it apart. I thought I'd check here before tearing into it.

tl;dr ?

Brake lever no go down all the way. Fix?

 

[porkysplace]

Have you lubricated the linkages ?

 

[98G]

Cable adjustment. Loosening the cable will get it closer to the floor. Tightening the cable will have it up higher.

Someone else may have more to add.

 

[Coffey1]

It may not be engaging spring brake but the drum brake on drive line may be dragging.

 

[Alexsha]

I'm not feeling any drag or brake smell over the norm. At 90* up the brake is securely engaged. When I drop it, the light/buzzer turns off and the lever is "loose" but it just sits at 30*. Any further down and it springs back up.

What's the best way to make sure its not dragging? Either a -TM # or some pointers would be great.

 

[Coffey1]

Scotch the wheels leave all brakes off clime under truck check tension on drive line brake.
See if it will move any should be some slack.

 

[Alexsha]

Scotch the wheels leave all brakes off clime under truck check tension on drive line brake.
See if it will move any should be some slack.

I had to look up 'scotch the wheels' lol

Will do in the a.m.

 

[Coffey1]

I can't spell worth a dang so found another word.
Don't want the ABC cops writing me a ticket lol.