Lull 6K Service Manual - Manual (Page 589)

Brakes
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 9-15
11. Install the brake pedal (Item 1) onto the actuator base (Item 5) by
pushing the pedal mounting pin (Item 6) through the U-clamps (Item 4)
until centered in the actuator base (Item 5).
12. Tighten the four (4) ¼" nuts (Item 2) on the U-clamps. Adjust the
deadband setscrew (Item 3) out so that it doesn’t contact the flange
head capscrew (Item 7).
13. Connect a 0–600 psi gauge to the brake test port located behind the
cab step.
14. Start the engine and record the maximum brake output pressure with
the brake pedal fully depressed. If the pressure is outside the range of
330–375 psi, adjust the flange head capscrew (Item 7). This can be
accomplished by turning the capscrew into the piston (Item 12) to
decrease the pressure or out to increase the pressure.
15. Repeat Step 1 through Step 6.
16. Record the number of turns it takes to remove the flange head
capscrew from the piston. Apply blue thread sealant the threads of the
capscrew, being careful not to get the thread sealant anywhere on the
piston sealing area. Turn the flange head capscrew in the recorded
number of turns.
17. Install and secure the piston guide (Item 9) into the body (Item 18).
18. Install rubber boot (Item 8) onto body. Apply a quality adhesive sealant
to the boot and the head of the flange bolt.
19. Repeat Step 11 and Step 12.
20. Adjust the deadband setscrew until it contacts the flange head
capscrew (Item 7).
21. Place a 0.010” shim between the actuator base (Item 5) and the pedal
return stop.
22. Connect a 0-600 psi gauge to the brake test port behind the cab step.
Start the engine.
23. Adjust the deadband setscrew just until the regulated output pressure
starts to rise, back out the setscrew 1/8 turn, and lock the setscrew
with the jam nut.
24. Remove the 0.010” shim and the 0–600 psi gauge.
25. (Ref. Fig. 9-9) Install the cab front panel as follows:
a. Secure the cab front cover (Item 1) to the front of the cab with three
(3) flatwashers (Item 4) and Phillips truss head screws (Item 5)
b. Secure the cab front cover to the cab step with a flatwasher
(Item 2) and Phillips truss head screw (Item 3).
c. Tighten screws until snug.