Brake System Air Removal
1800 YRM 1247
Brake System Air Removal There are two commonly used methods to remove air from the brake system. The preferred method is using a pressure bleed system. The other method is by applying pressure using the brake pedal. NOTE: Two people are required for the two procedures below to properly bleed the brake system.
E879, F879) equipped with a Standard Powershift (2-speed) transmission • GLP/GDP60VX, GLP/GDP70VX (GP/GLP/ GDP135VX, GP/GLP/GDP155VX) (C878, D878, E878) equipped with a Standard Powershift (2-speed) transmission See Figure 35.
USING PRESSURE BLEED SYSTEM WARNING On lift trucks with wet brake and dry brake drive axles, only use Dexron III brake oil in the master cylinder. NOTE: Adjust the service brakes before the air is removed from the brake system. 1. Fill the brake oil reservoir with Dexron III brake oil from a sealed container. 2. Place one end of a rubber hose on the bleeder screw of each wheel cylinder for lift trucks equipped with dry brakes or on the bleeder screws located on the drive axle for lift trucks equipped with wet brakes. Place the other end of rubber hose into a clear container of Dexron III brake oil. 3. Connect a pressure bleeder to the brake oil reservoir. NOTE: While applying air pressure to the pressure bleeder, check the level of the brake oil in the reservoir for the master cylinder. Make sure to maintain the brake oil at the correct level to avoid forcing more air into the brake system. 4. Apply 103.5 kPa (15 psi) of air pressure to the pressure bleeder, forcing oil through the lines until all air is removed from the system. Close the bleeder screws.
1. CAP 2. BLEED PORT FITTING 3. CONTROL VALVE
4. INCHING ACTUATOR 5. TRANSMISSION
Figure 35. Bleeding The Transmission 7. Check the level of the brake oil in the reservoir for the master cylinder. Fill the brake oil reservoir to the correct level.
USING BRAKE PEDAL PRESSURE Lift Truck Models with Master Cylinder WARNING
5. Loosen the bleeder screw, at the wheel cylinder for lift trucks equipped with dry brakes or on the drive axle for lift trucks equipped with wet brakes, one turn so that the air can be removed from the brake system.
On lift trucks with wet brake and dry brake drive axles, only use Dexron III brake oil in the master cylinder.
6. Loosen the bleed port fitting on the inching actuator and allow oil to run out until it is air free for lift truck models: • GLC/GDC60VX, GLC/GDC70VX (GC/GLC/ GDC135VX, GC/GLC/GDC155VX) (C879, D879,
1. Fill the brake oil reservoir with Dexron III brake oil from a sealed container.
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NOTE: Adjust the service brakes before the air is removed from the brake system.