Big Joe PDBB-20-T12, Operation, Maintenance, Repair Parts List

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901357 9-1
SECTION 9
HYDRAULIC SYSTEM SERVICING
9-1. RELIEVING SYSTEM PRESSURE.
WARNING: Hydraulic system pressure must be
relieved before removing hydraulic sys-
tem components. Use the following pro-
cedure to relieve system pressure:
1. Fully lower the platform.
2. Obtain a suitable container to catch any oil that
may escape when opening a line.
3. Open the low pressure line at any convenient
connection near the component that is to be
repaired or replaced.
9-2. FLOW CONTROL VALVE REPLACEMENT.
NOTE: Figure 9-1 show the relationship of all compo-
nents in the hydraulic system. Refer to these
figures for the following procedure.
1. With the lift truck wheels securely blocked and
with the brake set, raise platform approximately
three feet from floor. Position blocks or strong
supports under the inner mast (on telescopic
model) or under lift carriage (on non telescopic
model) while hydraulic system is under repair.
2. Lower inner mast or lift carriage onto supports.
Check that the arrangement is secure before pro-
ceeding.
3. Disconnect battery.
Figure 9-1 Hydraulic System
R6194