JLG E300 Service Manual - Manual (Page 83)

SECTION 3 - CHASSIS & TURNTABLE
3121253 – JLG Lift – 3-49
11. Install the worm cap (21) using proper shims (28) to
achieve 0.000 to 0.001" (0.000 to 0.025 mm) end
play. Apply LocTite 242 to end of 1/2-13 x 1.25"
grade 5 bolts (5) and LocTite #515 sealant to shims.
Torque the bolts to 75 lbs-ft (101.5 Nm).
12. Place the pinion/gear assembly into the housing so
the gear teeth mesh with the worm gear teeth. The
worm or gear set may have to be turned by hand to
achieve this.
13. Apply LocTite #515 to surfaces of the housing
where the cap assembly will touch. This includes the
vertical surfaces.
14. Place the gear cap assembly and shims set aside in
step 6, over the pinion assembly.
15. Apply LocTite 242 to the end of eight 5/16" 12 point
screws (3) and torque to 20 ft.lbs. (27 Nm).
16. Install 4 small screws (29) through the cover plate
(20) and into the housing (18). Tighten the screws
taking care not the twist the screws off.
17. Install the seal (8) in the worm cap at the hex end of
the worm.
18. Install the slew ring (14) using two 1/4" bolts (12)
and washers (13). Adjust backlash with the pinion to
0.008/0.012" (0.203/0.304 mm) and torque bolts to
10 ft.lbs. (13.5 Nm).
19. Fill the unit with SHC 007 grease (available as
SW007GK) and grease the pinion bearing (15) thru
the fitting (9) with Mobil SHC 460 grease.
3.9 SWING BEARING
Turntable Bearing Mounting Bolt Condition
Check
NOTE: This check is designed to replace the existing bear-
ing bolt torque checks on JLG Lifts in service. This
check must be performed after the first 50 hours of
machine operation and every 600 hours of machine
operation thereafter. If during this check any bolts
are found to be missing or loose, replace missing or
loose bolts with new bolts and torque to the value
specified in the torque chart, after lubricating the bolt
threads with threadlocker JLG P/N 0100019. After
replacing and retorquing bolt or bolts recheck all
existing bolts for looseness.
1. Check the frame to bearing bolts as follows:
a. On a firm level surface, elevate the fully retracted
boom to full elevation.
b. At the position indicated on Figure 3-24., Swing
Bearing Tolerance Boom Placement try and
insert the 0.0015” feeler gauge between the bolt
head and hardened washer at the arrow indi-
cated position.
c. Assure that the 0.0015” feeler gauge will not
penetrate under the bolt head to the bolt shank.
d. Swing the turntable 90 degrees, and check
some selected bolts at the new position.
e. Continue rotating the turntable at 90 degrees
intervals until a sampling of bolts have been
checked in all quadrants.
2. Check the turntable to bearing bolts as follows:
a. On a firm level surface, elevate the fully retracted
boom to full elevation.
b. At the positions indicated on Figure 3-24., Swing
Bearing Tolerance Boom Placement try and
insert the 0.0015” feeler gauge between the bolt
head and hardened washer at the arrow indi-
cated position.