Big Joe J1-192, Руководство по ремонту и запасным частям

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BL-J1-192-0315 - 11-19-2019 8-1
SECTION 8
HYDRAULIC SYSTEM SERVICING
8-1. LINES AND FITTINGS
WARNING: When the platform is raised, pressure
exists in the hydraulic system lines and
fittings. To ensure release of pressure,
platform must be fully lowered and the
batteries disconnected before perform-
ing any maintenance on the hydraulic
system.
NOTE: Leaking hydraulic fittings may be remedied by
simply tightening fittings. If this does not rem-
edy the leak, the fittings or line must be
replaced.
1. Fully lower the platform.
2. Engage the emergency power disconnect switch
and turn off key switch.
3. Remove the compartment cover as described in
paragraph
4-2.
CAUTION: Hydraulic oil can damage parts. Wipe off
any oil immediately. Provide a container
under the line or fitting before discon-
necting.
4. Three Stage Mast vehicles : Refer to Figure 8-1
and Figure 8-3 and remove leaking line or fitting
and replace it with a new line or fitting.
5. Check level of hydraulic oil. If required, add
hydraulic oil to bring to proper level. Use hydraulic
oil listed in
Table 2-2 .
6. Disengage the emergency power disconnect
switch and turn on key switch.
7. Operate the lift and lower buttons to refill the
cylinder and lines with hydraulic oil.
8. Check level of hydraulic oil. If required, add
hydraulic oil to bring to proper level. Use hydraulic
oil listed in
Table 2-2 .
9. Install the compartment cover as described in
paragraph
4-2.
8-2. HYDRAULIC PUMP, MOTOR, AND RESER-
VOIR ASSY
The hydraulic pump/motor assembly can be disas-
sembled and repaired. However, a defective pump,
valve or motor requires replacement of that compo-
nent.
WARNING: When the platform is raised, pressure
exists in the hydraulic system lines and
fittings. To ensure release of pressure,
platform must be fully lowered and the
batteries disconnected before perform-
ing any maintenance on the hydraulic
system.
8-2.1. Removal
1. Fully lower the platform.
2. Engage the emergency power disconnect switch
and turn off key switch.
3. Remove the compartment cover as described in
paragraph
4-2.
4. Tag and disconnect electrical leads from motor
and solenoid of pump/motor assembly.
NOTE: The reservoir and tube will be filled with
hydraulic oil. Place a container under the
pump assembly to catch any hydraulic oil.
5. Disconnect hose from pump/motor assembly.
6. While supporting pump/motor assembly, remove
four screws, four lock washers and four flat wash-
ers.
7. Remove the pump/motor assembly.
8-2.2. Disassembly and Reassembly
1. Remove the hydraulic pump/motor assembly as
described in paragraph
8-2.1.
2. Refer to Figure 11-8 for disassembly and reas-
sembly.