Lull 6K Service Manual - Manual (Page 609)

Brakes
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 9-35
f. Clean all remaining parts with appropriate solvent and dry with
compressed air. Inspect and replace any damaged parts.
Note: It may not be necessary to separate control knob (Item 1) and
lockwasher (Item 2) from valve spool (Item 4). Disassemble only if they
are damaged or extremely contaminated.
Note: The valve spool (Item 4) and valve housing (Item 7) are not sold
separately. If these parts are damaged, it will necessary to replace the
entire park brake valve assembly.
g. Install new O-rings (Items 6 and 8) and backup rings (Items 5 and
9) into valve housing in order shown in Fig. 9-20. Lubricate O-rings
and backup rings before installing them.
h. Install new snap ring (Item 3) into slot on valve spool near control
knob.
i. Install valve spool assembly (Items 1–4) into valve housing
(Item 7).
j. Install remaining snap ring (Item 10) into slot near end of valve
spool.
Valve Installation, Park Brake
The following installation procedure refers to Fig. 9-19.
1. Reconnect elbow (Item 5), check valve (Item 12), and connector
(Item 13) to assembled park brake valve (Item 4). For final tightening,
torque the check valve and connector to 46–50 ft-lbs and the elbow to
40–44 ft-lbs.
2. Install the park brake valve assembly (Item 4) on the instrument panel
(Item 3) using two (2) each capscrews (Item 1) and lockwashers
(Item 2). For final tightening, torque the capscrews to 156 in-lbs.
3. Reconnect the hydraulic hoses (Items 6, 11, and 14) to elbow (Item 5),
check valve (Item 12), and connector (Item 13). For final tightening,
torque hydraulic hose swivel nuts to 235–265 in-lbs.