JLG 4394RT Service Manual - Manual (Page 51)

SECTION 3 - CHASSIS & SCISSOR ARMS
3121133 – JLG Sizzor – 3-15
8. Heat upper ring with roller cage of double Tapered
Roller Bearing (11) to approximately 189.5°F/70°C
and mount onto Spindle (34). Allow cooling time of
approximately 15 minutes before continuing assem-
bly.
9. De-grease threads of Spindle (34) and Shaft Nut (4).
Then evenly apply coat of Loctite 270 to Shaft Nut
(4) threads.
10. Rotate the supporitng ring repeatedly in one direc-
tion only when setting the tapered roller bearing.
a. Tighten Shaft Nut (4) by using an adequate
device with a tightening torque of 627 lb-ft (850
Nm).
b. The Loctite setting time equals 24 hours at ambi-
ent temperature of 68°F/20°C.
11. After proper bearing setting is completed, hammer
ball with suitable punch, 1.1 - 1.3mm into the spindle
thread. Retain ball in position with expanding plug.
12. Insert a new greased O-Ring (16) into the o-ring
groove of the Supporting Ring (6).