Lull 6K Service Manual - Manual (Page 616)

Brakes
9-42 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Models with Vertical Cylinder Mount
644B-37 (S/N 384–)
644B-42 (S/N 120–)
844C-42 (S/N 282–)
1044C-42 (S/N 107–)
1044C-54 (S/N 103–)
6K-37 (S/N 212–)
6K-42 (S/N 106–)
8K-42 (S/N 163–164, 166–)
10K-42 (S/N 107–)
10K-54 (S/N 101–) The park brake cylinder used on models with a vertical cylinder mount
require only an adjustment to the position of the clevis and jam nut (see
Fig. 9-22). As the brake shoes wear, the position of these two items will
need to move closer to the end of the threaded portion of the cylinder rod.
1. Follow preparation procedures as outlined in Section 3 and in
Section 5 of this manual.
2. Block the wheels and make sure the park brake is released.
3. Install a brake pressure diagnostic port test gauge to the hose into the
brake diagnostic port.
4. While watching test gauge, press brake pedal numerous times until
pressure gauge reads 0 psi. Remove test gauge and cap diagnostic
port.
5. Remove cotter pin (Item 8) from clevis pin (Item 9). While holding the
brake cam (Item 7) up, remove clevis pin from clevis (Item 10).
Note: With the park brake cylinder (Item 6) fully extended and the brake cam
(Item 7) raised 1/16–1/8” from its lowest possible position, it should be
possible to insert the clevis pin (Item 9) directly into the clevis (Item 10).
6. Make any necessary adjustments in the position of the clevis on the
cylinder rod to meet the guidelines described in the above note.
7. Insert clevis pin in clevis and install cotter pin in clevis pin.
Drum Brake Repair/Replacement
Refer to ZF (Zahnradfabrik Passau) repair and maintenance manual for
drum brake replacement procedures.