Lull 6K Service Manual - Manual (Page 614)

Brakes
9-40 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Note: With the park brake cylinder (Item 5) fully extended and the brake cam
(Item 15) raised 1/16–1/8” from its lowest possible position, it should be
possible to insert the clevis pin (Item 10) directly into the clevis (Item 8) and
through the bell crank (Item 11).
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. Install new cotter pin (Item 9) on clevis pin.
8. Tighten jam nut (Item 6) to ensure that lockwasher (Item 7) is secured
to clevis.
9. Reconnect hydraulic brake hose (Item 3) to elbow and torque hose
swivel nut to 235–265 in-lbs.
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 following procedure refers to Fig. 9-22.
1. Install elbow (Item 3) on new park brake cylinder (Item 6). Position
elbow as shown in Fig. 9-22. For final tightening, turn elbow 1.5–3
turns past finger tight.
2. Install park brake cylinder on brake cylinder mount (Item 1) using the
clevis pin (Item 4) and new cotter pin (Item 5).
3. Install clevis (Item 10), lockwasher (Item 11), and jam nut (Item 12) on
new park brake cylinder.
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).
4. Make any necessary adjustments in the position of the clevis on the
cylinder rod to meet the guidelines described in the above note.
5. Install new cotter pin (Item 8) on clevis pin.
6. Tighten jam nut (Item 12) to ensure that lockwasher (Item 11) is
secured to clevis.
7. Reconnect hydraulic brake hose (Item 2) to elbow and torque swivel
nut to 235–265 in-lbs.
8. Install park brake pressure switch (Item 13) on service brake.
9. Reconnect wiring harness (Item 14) to park brake pressure switch.
Adjustment, Park Brake
CAUTION: To avoid possible injury, be sure to park the vehicle on a level
surface, lower the boom to the ground, shut off the engine,
make sure the park brake is released, and
block the wheels
before servicing the park brake.