Blue Giant BGN-40, Руководство пользователя

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SECTION 9
HYDRAULIC SYSTEM SERVICING
9-1. LINES AND FITTINGS
WARNING:
When forks are raised, pressure exists in
the hydraulic system lines and fittings.
To ensure release of pressure, forks
must be fully lowered and the batteries
disconnected before performing 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. Lower forks fully.
2. Turn off the key switch (1, Figure 12-24 ) and dis-
connect the batteries.
3. Remove the compartment covers as described in
paragraph
5-3.
CAUTION:
Hydraulic oil can damage parts. Wipe off
any oil immediately. Provide a container
under the line or fitting before discon-
necting.
4.
Telescopic T rucks
: Refer to Figure 9-1 , Figure
12-17 or Figure 12-18 and remove leaking line or
fitting and replace it with a new line or fitting.
TRIMAST Trucks
: Refer to Figure 9-1 , Figure 12-
19 or Figure 12-20 and remove leaking line or fit-
ting 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 3-2 .
6. Reconnect the batteries and turn on the keyswitch
(1,
Figure 12-24 ).
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 3-2 .
9. Install the compartment covers as described in
paragraph
5-3.
9-2. HYDRAULIC PUMP, M OTOR, AND RE SER-
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 forks are raised, pressure exists in
the hydraulic system lines and fittings.
To ensure release of pressure, forks
must be fully lowered and the batteries
disconnected before performing any
maintenance on the hydraulic system.
9-2.1. Removal
1. Lower forks fully.
2. Turn off the key switch (1, Figure 12-24 ) and dis-
connect the batteries.
3. Remove the compartment covers as described in
paragraph
5-3.
4. Tag and disconnect electrical leads from motor
and solenoid of pump/motor assembly (1,
Figure
9-1 ).
NOTE:
The reservoir and hose will be filled with
hydraulic oil. Place a container under the
pump assembly to catch any hydraulic oil.
5. Disconnect hose (10) from pump/motor assembly
(1).
6. While supporting pump/motor assembly (1),
remove four screws (2) and four lock washers (3).
7. Remove the pump/motor assembly (1).
9-2.2. Disassembly and Reassembly
1. Remove the hydraulic pump/motor assembly as
described in paragraph
9-2.1.
2. Refer to Figure 12-16 for disassembly and reas-
sembly.
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