Blue Giant BGL-33, Owner'S Manual

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9-4.2. 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 (3, Figure 9-7 ).
3. Remove wiper (1) and O-ring (2) from gland nut
(3).
4. Pull out piston rod (4).
5. Remove packing (7), ring (6) and backup ring (5)
from piston rod (4).
6. Coat all parts with hydraulic oil ( Table 3-2 ).
7. Install backup ring (5), ring (6) and packing (7) on
piston rod (4).
8. Insert rod (4) in cylinder tube (8).
9. Install O-ring (2) and wiper (1) on gland nut (3).
10. Install gland nut (3) in cylinder tube (8).
9-4.3. Installation
1. Position cylinder (9, Figure 9-6 ) on inner mast
(20) and secure with two screws (2), two lock
washers (3) and two flat washers (17).
2. Reconnect the tube (3, Figure 9-5 ) to the bottom
of the cylinder.
3. Position ram head (8, Figure 9-6 ) and bracket (7)
and on cylinder (9) and secure with screw (16),
lock washer (3), and washer (17).
4. Position lift chains over sheave, (14) and secure
lift chain to the anchor at cylinder (9) with clevis
pin and cotter pin.
5. Adjust the chains according to paragraph 8-2.
6. Fill the hydraulic reservoir. Use hydraulic oil listed
in Table 3-2 .
7. Reconnect the batteries and turn on the keyswitch
(5, Figure 12-22 ).
8. Operate the lift and lower buttons to refill the
cylinder and lines with hydraulic oil.
9. Check level of hydraulic oil. If required, add
hydraulic oil to bring to proper level. Use hydraulic
oil listed in Table 3-2 .
Figure 9-7 Free Lift Cylinder (Three Stage Mast)
R7233
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