Lull 6K Service Manual - Manual (Page 604)

Brakes
9-30 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Park Brake Pressure Switch
Removal
Models with Control Manifold Hydraulics
6K-37 (S/N 101–317)
6K-42 (S/N 101–119)
8K-42 (S/N 101–220)
10K-42 (S/N 101–106)
10K-54 (S/N 101–103)
644B-37 (S/N 101–590, 592–666)
644B-42 (S/N 101–207)
844C-42 (S/N 101–621)
1044C-42 (S/N 101–116)
1044C-54 (S/N 101–154)
Fig. 9-17: Park Brake Pressure Switch - Models with Control Manifold
Hydraulics
(Ref. Fig. 9-17) For models with control manifold hydraulics, the park brake
pressure switch is located on the center, rear portion of the valve plate.
This switch is normally closed and is set to open at 100 psi.
1. Follow preparation procedures as outlined in Section 3 and in
Section 5 of this manual.
CAUTION: To avoid potential injury, be sure to park the vehicle on a level
surface, lower the boom to the ground, shut off the engine,
and
block the wheels before servicing the park brake.
2. Release the park brake.
3. Tag and disconnect the wiring harness connectors (Item 1) from the
connectors on the brake pressure switch (Item 2).
# Description
1 Wiring Harness Connector
2 Park Brake Pressure Switch
3 Reducer Bushing
4 Adapter
# Description
5 Hydraulic Hose to Brake Cylinder
6 Swivel Branch Tee
7 Hydraulic Hose to Brake Valve
1
V
1
074
2
3
4
5
6
7