Mast Assembly Lifting; Mast Section #1 Set On Blockings - JLG TOUCAN 10E Service And Maintenance Manual

WHEN MAST SECTIONS ASSEMBLY IS LIFTED, MAST CYLINDER
WILL NORMALLY EXTEND. IF NOT, PUSH THE CYLINDER BAR-
REL DOWN (TO EXTEND THE CYLINDER) TO RETURN THE
STUDS OF THE BARREL BOTTOM END TO THEIR SUPPORT ON
BASE PLATE.
14. Plug mast cylinder port (3/8"BSPP). This is to pre-
vent the cylinder from retracting suddenly when the
anchor pin on mast section #2 will be removed.
15. Remove one cotter pin from mast cylinder anchor
pin. Using a suitable drift, drive the pin out. Tie the
cylinder to mast section #1 with a rope and protect
the chrome surface of the rod.
16. Carefully lift the mast sections assembly until the
roller pins at the bottom of mast section #2 are
accessible. REMOVE THE ROLLER PIN LOCKNUTS
and slightly unscrew roller pins to allow clearance.
Lift the mast sections assembly as shown following.
Figure 5-6. Mast Assembly Lifting
17. Carefully place the mast sections assembly vertically
on a flat and level surface near the chassis
18. Tag, disconnect and remove the drive orientation
switch.
19. Remove the cylinder from mast section #1 using a
suitable sling attached to the barrel. Move the cylin-
der to a clean area.
20. Using a suitable
attached to both lifting rings of mast section #1, lift
and place the unit on blocks of a minimum height of
300mm (12") and capable of supporting the weight
of the work platform. Position the blocks in such a
way that the swing bearing attach screws remain
accessible and that the machine is stable on blocks.
21. Keep lifting equipment attached to both lifting rings
and draw all slack from slings/chains.
22. Remove bearing teeth covers to gain access to the
heads of the screws securing the bearing to the
chassis. Remove and discard the 24 nuts and hard-
31210090
overhead lifting equipment
SECTION 5 - TURNTABLE AND VERTICAL MAST
ened washers securing the swing bearing outer race
to the chassis. Carefully lift mast section #1 assem-
bly and set it as shown following.
Figure 5-7. Mast Section #1 Set on Blockings
23. Remove and discard the hardware securing the
bearing to the base plate. Use suitable lifting equip-
ment to remove the bearing. Remove and discard
the 24 hex. head screws from the bearing outer
race.
24. Clean and inspect pinion teeth for damage or exces-
sive wear. Replace swing motor if necessary. Clean
bearing seating surfaces on the chassis and on the
turntable base plate. Free threaded holes of turnta-
ble base plate from dirt, oil or foreign material.
Installation
SINCE THE SWING BEARING IS THE ONLY STRUCTURAL LINK
BETWEEN THE CHASSIS AND TURNTABLE, USE A GENUINE JLG
PART IS HIGHLY RECOMMENDED.
1. Install swing motor assembly if removed.
2. Rotate the inner race of the new bearing in such a
way that the maximum eccentricity point (marked by
a green spot on 3 teeth) matches with the pinion of
the swing motor and that the area of the inner race
where a hole is missing (ball loading plug area)
aligns with the area where a hole is missing on the
turntable base plate. See Figure below:
Figure 5-8. Bearing Alignment
– JLG Lift – 5-3