Blue Giant BGL-22, Руководство пользователя

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9-3. Lift Cylinder (Telescopic)
9-3.1. Removal
1. With the lift truck wheels securely blocked, raise
the forks approximately three feet from floor and
position blocks or strong supports under inner
mast
2. Lower inner mast onto the support. Check that
arrangement is secure before proceeding.
3. Turn off the key switch (6, Figure 12-22 ) and dis-
connect the batteries.
WARNING: Before attempting any replacement,
make certain power is disconnected.
4. Remove screw (9, Figure 9-4 ), lock washer (10)
and flat washer (11).
5. Remove screw (28).
CAUTION: Hydraulic oil can damage parts. Wipe off
any oil immediately. Provide a container
under the line or fitting before discon-
necting.
6. Loosen hose (1, Figure 9-2 ) at the bottom of lift
cylinder and manually push the cylinder rod down
as far as possible. The chains will become slack
and need not be removed.
7. Disconnect the hose from the bottom of lift cylin-
der.
8. Lift chains clear of sheaves (13, Figure 9-4 ) and
lay them aside.
WARNING: Support lift cylinder before performing
the following steps to prevent cylinder
from falling.
9. Tilt lift cylinder (17) and ram head (14) forward
from their position in the truck.
10. Lift ram head from the cylinder.
11. Raise lift cylinder assembly up and out of truck.
9-3.2. Repair
CAUTION: To prevent damage, use proper pipe
clamp vise. The cylinder will be distorted
if the vise is tightened too much.
1. Secure the lift cylinder in a vise, clamping lightly
at the base of the cylinder.
2. Remove gland nut (7, Figure 9-5 ).
3. Remove wiper ring (8) and O-ring (9) from gland
nut (7).
4. Pull out piston rod (1).
5. Remove bushing (4) and bearing (5)
6. Remove piston (2) and O-ring (3) from rod (1).
7. Remove packing (11) and backup ring (10) from
piston (1).
8. Coat all parts with hydraulic oil ( Table 3-2 ).
9. Install packing (11) and backup ring (10) on piston
(1).
10. Install new O-ring (3) on rod (1).
11. Install piston (2) on rod (1).
12. Install bushing (4) and bearing (5)
13. Insert rod (1) in cylinder tube (6).
14. Install wiper ring (8) and O-ring (9) on gland nut
(7).
15. Install gland nut (7) in cylinder tube (1).
9-3.3. Installation
1. Position the cylinder on outer mast (18, Figure 9-
4 ).
2. With the cylinder tilted slightly forward, position
ram head (14) on top of cylinder (17). Then tilt the
cylinder back into position.
3. Lift up the lift chains and position them on
sheaves (13).
4. Using a suitable lifting device, lift the inner mast
and remove the supports.
5. Slowly lower the inner mast while lining up the lift
cylinder with positioner (12).
6. Secure the top of the cylinder with screw (9), lock
washer (10) and flat washer (11).
7. Secure the bottom of the cylinder with screw (28).
8. Reconnect the hose (1, Figure 9-2 ) to the bottom
of lift cylinder.
9. Adjust the chains according to paragraph 8-2.
10. Fill the hydraulic reservoir. Use hydraulic oil listed
in Table 3-2 .
11. Reconnect the batteries and turn on the keyswitch
(6, Figure 12-22 ).
12. Operate the lift and lower buttons to refill the
cylinder and lines with hydraulic oil.
13. Check level of hydraulic oil. If required, add
hydraulic oil to bring to proper level. Use hydraulic
oil listed in
Table 3-2 .
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