SAFETY MEETING. Off Highway Trucks. Brakes. There are four separate controls used for braking Service Brake Retarder Secondary Brake Parking Brake. Dual Piston. Yellow- Secondary Parking Spring Applied /Oil Released Purple - Service/ Retarding Air Over Oil Applied.
Off Highway Trucks
Yellow- Secondary Parking
Spring Applied /Oil Released
Purple - Service/ Retarding
Air Over Oil Applied
When the air system is drained, the parking brake reset valve will not allow the parking brake to be released until the system is full of air and the operator manually has to push this yellow button down.
Start of shift
Service, Secondary and Park Brakes
Apply brake being tested, release park brake(unless it is under test), gradually increase engine speed to approximately 1200 rpm, truck should not move. Do not operate if it does and have necessary repairs made.
AND OIL IS COLD
AND OIL IS HOT
1. Start switch to on
2. Hoist to body down position
3. Hold brake release for 20 sec
4. If it does not go down, hold hoist in raise position for 15 seconds. Move hoist to lower, if it still does not go down, there is a problem!