Ram Head Removal; Lubrication Of Mast - Big Joe PDBB-20-T12 Operation, Maintenance, Repair Parts List

WARNING: Before disconnecting any hydraulic line,
be sure the system is not under pres-
sure.
8. Disconnect hose assembly from bottom of lift cyl-
inder. Disconnect overflow tubing from top of lift
cylinder (10).
9. Lift chains clear of ram head (9) and lay them
aside.
10. Remove screw (23), lock washer (22), plain
washer (21) and spacer (20) from underside of
cylinder.
WARNING: Support lift cylinder before performing
the following steps to prevent cylinder
from falling.
11. Tilt the lift cylinder (10) and ram head (9) forward
from their position in the lift truck.
12. Lift ram head from lift cylinder.
13. Raise lift cylinder assembly up and out of truck.
NOTE: Disassembly of lift cylinder is covered in
TION 9.
14. Reinstall lift cylinder in reverse order of removal.
15. Adjust chain according to paragraph

8-6. RAM HEAD REMOVAL.

WARNING: Make certain power is disconnected
before attempting to remove ram head.
901357
1. With the lift truck wheels securely blocked and
with brake set, raise platform approximately three
feet from floor and position blocks or strong sup-
ports under inner mast (4,
2. Lower inner mast onto support. Check that
arrangement is secure before proceeding.
3. Disconnect battery.
4. Remove two cap screws (7), two lock washers
(8), one cap screw (6) and one lock washer (5)
that join the top of the inner mast (4) to the ram
head (9).
5. Open the emergency lowering valve and, at the
same time, manually push the ram down as far as
possible. The chains will become slack and need
not be removed.
6. Close the emergency lowering valve.
7. Lift chains clear of ram head (9) and lay them
aside.
8. Lift ram head (25) from lift cylinder (24).
SEC-

8-7. LUBRICATION OF MAST.

Fully lower platform, then apply a (Lithium base) gen-
eral purpose grease, using a lubrication gun, to the fol-
lowing components:
8-3.
1. Grease fittings on platform rollers (3,
2. Grease fittings on ram head (9).
Using a brush, apply the same Lithium base general
purpose lubricant to the full length of the mast channel
where the rollers ride. Upon completion, operate the
mast to allow lubricant to spread evenly.
Figure 8-1).
Figure 8-1).
8-3