OM3024.1 8/00 Operation - Section 3 Operating Instructions Page 3-5 AFTER ENGINE HAS STARTED c. Reduce engine speed to low idle, move re- tarder lever to Off position (lever up). Service brake lamp should turn off. Place range selec- tor in the N position. After the engine has been started, operate at ap- proximately 1000 rpm, until coolant temperature gauge is indicating “normal” (green) range. Become thoroughly familiar with steering, braking, and emergency controls. Parking Brake 4. Check operation of the parking brake: a. Press the parking brake switch (3, Figure 3-1) to the ON (applied) position. Verify red parking brake ON lamp (5) in left pod illuminates. b.
Move the transmission range selector (2, Fig- ure 3-2) to any position other than N ; verify the central warning lamp (6) on the left pod flashes. c. Move transmission range selector to the 5 position and gradually increase engine speed to 1640 rpm. Truck must not move. If truck moves, notify maintenance person- nel to adjust parking brake. DO NOT oper- ate truck until parking brake is fully operational. d. Reduce engine speed to low idle. Place selec- tor lever in N position. During the following safety checks, if actuation or release of any steering , brake or emergency con- trol circuit does not appear normal, shut engine down immediately and notify maintenance person- nel.
Do not operate truck until circuit in question is fully operational. Be certain area around truck is clear before test- ing. Steering 1. Test the truck steering in extreme right and left directions. If the steering system is not operating properly, shut engine down immediately. Deter- mine the steering system problem and have re- pairs made before resuming operation. Service Brake 2. With the truck on flat ground, check for normal operation of the service (foot) brake: a. Depress foot brake pedal (1, Figure 3-1). Verify amber service brake lamp (4) in left pod illumi- nates. b. Move transmission range selector (2, Figure 3-2) to the 5 position and gradually increase engine speed to 1560 rpm.
Truck must not move. c. Reduce engine speed to low idle, release serv- ice brake and place range selector in the N position. Verify service brake lamp is off. Retarder 3. With the truck on flat ground, check retarder operation: a. Move the retarder lever (2, Figure 3-1) to maximum retard position (lever down. Verify amber service brake lamp (4) in left pod illumi- nates. b. Move transmission range selector to the 5 position and gradually increase engine speed to 1560 rpm. Truck must not move. FIGURE 3-1. BRAKE SYSTEMS CONTROLS 1. Service Brake 2. Retarder Lever 3. Auxiliary Brake Switch 4. Service Brake Lamp 5. Parking Brake Lamp 6. Central Warning Lamp