SECTION XIII. BRAKE PROBLEMS-2 1/2-TON and 5-Ton Trucks
1. You can get somebody killed if you use a nut and bolt instead of a clevis pin at the truck's master cylinder. The nut
vibrates off a standard bolt and then you have no brakes.
2. All M44-, M39-, and M809-series trucks have the right pin listed in their -20P TM's. It's easier to find and use the
clevis pin than to explain after an accident why you used a substitute.
3. That litle piece of cork that goes on the rear wheel drums of these trucks may not look important, but it is. If the inner
oil seal leaks, it keeps oil from washing grease out of the wheel bearings. Without grease, the bearings burn up. The oil
will get on the brake drum, the lining and the brake shoes.
4. Oil and brakes don't mix. The brakes will go out and the driver could get a fatal surprise if he has to stop in a hurry
All because of a small piece of very important cork.