JLG 80HX_HX+6_HXER ANSI Service Manual - Manual (Page 77)

SECTION 3 - CHASSIS & TURNTABLE
3120271 – JLG Lift – 3-39
18. Use suitable lifting equipment to carefully position
the turntable assembly above the machine frame.
19. Carefully lower the turntable onto the swing bearing,
ensuring that the turntable and bearing align as
noted in step 9 above.
IF COMPRESSED AIR OR ELECTRICALLY OPERATED IMPACT
WRENCH IS USED FOR TIGHTENING THE BEARING ATTACH-
MENT BOLTS, THE TORQUE SETTING ACCURACY OF THE TOOL
SHOULD BE CHECKED PRIOR TO USE.
20. Spray a light coat of Safety Solvent 13 to the new
bearing bolts. Then apply a light coating of Loctite
#271 to the new bearing bolts, and install the bolts,
washers and nuts through the turntable and inner
race of the bearing.
21. Following the Torque Sequence diagram shown in
Figure 3-15., torque the bolts to the values listed
under Swing Bearing Torque Values.
22. Remove the lifting equipment.
23. Install the rotary coupling retaining yoke, apply a
light coating of Loctite Sealant #TL277-41 to the
attaching bolts and secure the yoke to the rotary
coupling with the bolts and lockwasher.
24. Connect the hydraulic lines to the rotary coupling as
tagged prior to removal.
25. At the ground control station, use the boom lift con-
trol to lower the boom to the stowed position.
26. Using all applicable safety precautions, activate the
hydraulic system and functionally check the swing
system for proper and safe operation.
Swing Bearing Torque Values
Prior to April, 1986.
1. Outer Race
5/8" Bolts - 170 ft. lbs. (235 NM) wet, 220 ft. lbs. (304
NM) dry.
7/8" Bolts - 460 ft. lbs. (636 NM) wet, 600 ft. lbs. (830
NM) dry.
2. Inner Race
5/8" Bolts - 170 ft. lbs. (235 NM) wet, 220 ft. lbs. (304
NM) dry.
7/8" Bolts - 460 ft. lbs. (636 NM) wet, 600 ft. lbs. (830
NM) dry.
3. Swing Bearing Torquing Sequence, see Figure
2-21.
April, 1986 to Present.
1. Outer Race - 170 ft. lbs. (235 NM) wet, 220 ft. lbs.
(304 NM) dry.
2. Inner Race - 170 ft. lbs. (235 NM) wet, 220 ft. lbs.
(304 NM) dry.
3. Swing Bearing Torquing Sequence, see Figure
2-21.
RETORQUE THE INNER AND OUTER SWING BEARING BOLTS
AFTER FIRST 200 HOURS OF OPERATION, AND EVERY 500
HOURS THEREAFTER.