Owner's manual

136

Model 644E Rev. 8/03

General Maintenance

4. Turn the ignition switch to the ON position (with the engine not running),

release the park brake (park brake switch OFF).

5. Pressurize the park brake with the pressurizing unit. Pump pressure into

the park brake system. DO NOT exceed 650 psi (45 bar). Close the pump

needle valve on the pressurizing unit.

6. Working through the level plug hole (1), carefully use a screwdriver to

spread the brake disks apart.

IMPORTANT! DO NOT damage the surfaces of the brake disks when spreading the

brake disks.

7. Using a feeler gauge, check the gap (2) between the brake disks (3). If the

gap is greater than .167" (4,25 mm), replace the brake disks.

NOTE: If the brake disks are worn beyond .167" (4,25 mm), the brake disk must be

replaced on both sides of the axle at the same time.

8. Repeat step 6 and step 7 for the other side of the axle.

9. Continue with step 6 of “B. Axle Oil Change” on page 134.

CAUTION: DO NOT exceed 650 psi (45 bar) when pressurizing

the park brake. Applying too much pressure may damage the brake

seals.

MT2850