Lull 6K Service Manual - Manual (Page 584)

Brakes
9-10 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
The following service brake removal procedure refers to Fig. 9-6.
1. Follow preparation procedures as outlined in Section 3 and in
Section 5 of this manual.
2. With the engine off, connect a 0–600 psi gauge to the test port located
behind the cab step.
3. Pump the brake repeatedly until the gauge reads 0 psi.
4. Loosen and remove Phillips truss head screw (Item 7), flatwashers
(Items 5 and 6), lockwasher (Item 4), and hex nut (Item 3) that secure
cab front cover (Item 1) to cab step.
5. Loosen and remove remaining three (3) Phillips truss head screws
(Item 2) and cab front cover.
6. Slowly loosen hydraulic hoses (Items 8 and 9) from elbows (Items 16
and 17). Tag hoses and fittings. Disconnect hoses and drain remaining
oil into appropriate container.
7. Slowly loosen swivel tee (Item 13) from elbow (Item 14) connected to
the brake valve. Disconnect tee and drain remaining oil into
appropriate container.
8. Loosen and remove three (3) each capscrews (Item 15), nuts
(Item 11), and lockwashers (Item 12) that secure the service brake and
valve assembly to floor of cab.
9. Remove service brake and valve assembly (Item 10) from the machine
and take it to a suitable location for further disassembly.
10. Note position of, tag, and remove three (3) elbows (Items 14, 16,
and 17) from service brake and valve assembly. Clean with solvent and
dry with compressed air.