Mast Section #1 Set On Blockings; Bearing Alignment T10E/T26E; Bearing Alignment T8E/T20E - JLG TOUCAN 8E Service And Maintenance Manual

SECTION 5 - TURNTABLE AND VERTICAL MAST
19. Carefully place the mast sections assembly vertically
on a flat and level surface near the chassis
20. Tag, disconnect and remove the drive orientation
switch.
21. Remove the cylinder from mast section #1 using a
suitable sling attached to the barrel. Move the cylin-
der to a clean area.
22. 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.
23. Keep lifting equipment attached to both lifting rings
and draw all slack from slings/chains.
24. 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-
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 5-8. Mast Section #1 Set on Blockings
25. 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.
26. 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
5-4
overhead lifting equipment
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 5-9. Bearing Alignment T10E/T26E
Figure 5-10. Bearing Alignment T8E/T20E
JLG INDUSTRIES RECOMMEND THAT ALL REMOVED BEARING
NUTS, BOLTS AND HARDENED WASHER TO BE DISCARDED
AND REPLACED WITH NEW PARTS. SINCE THE SWING BEARING
IS THE ONLY STRUCTURAL LINK BETWEEN THE CHASSIS AND
TURNTABLE, IT IS IMPERATIVE THAT REPLACEMENT HARD-
WARE MEETS JLG SPECIFICATIONS. USE OF GENUINE JLG
HARDWARE IS HIGHLY RECOMMENDED.
3. Insert the 24 new hex. head screws M12-90 into the
outer bearing race mounting holes prior to install the
bearing on the turntable base plate.
4. Place bearing onto the turntable base plate with the
maximum eccentricity point aligned with the pinion.
Loosely install new M12x90 hex. head cap screws
and locknuts through inner race of bearing and turn-
table base plate. Apply a light coating of Loc-
tite®270 to the new M12x70 hex. head cap screws
and loosely install screws through inner race of
bearing.
5. Insert a feeler gauge of 0.20 mm (0.008 in) between
the bearing and the pinion teeth as shown below to
– JLG Lift – 31210090