Seal Inspection And Replacement; Bearing Adjustment - JLG T500J Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE
2. Press a section of the widest end of the bearing into the
outer edge of the grease pile closest to the thumb forc-
ing grease into the interior of the bearing.
3. Repeat this while rotating the bearing from roller to
roller.
4. Continue this process until the entire bearing is com-
pletely filled with grease.
5. Before installing, apply a light coat of grease on the
bearing cup.
Thickener Type..................................................... Lithium Complex
Dropping Point ...................................... 419° F (215°C) Minimum
Consistency .........................................................................NLGI No. 2
Additives ............................EP, Corrosion & Oxidation Inhibitors
Viscosity Index............................................................... 80 Minimum
Approved Sources:
Mobil Oil ....................................... Mobilgrease HP, Mobilith AW2
Exxon/Standard ..................................................................Ronex MP
Kendall Refining Co. ...................................................Kendall L-427
Ashland Oil Co.................................. Valvoline Multipurpose GM
76 Lubricants ............................................................76 Multiplex EP
Citgo Petroleum...................................................... Lithoplex MP#2
Mystik .................................................. Mystik JT-6 Hi Temp Grease
Pennzoil ...........................Premium Wheel Bearing Grease 707L

Seal Inspection and Replacement

Whenever the hub is removed, inspect the seal to assure it is
not nicked or torn and is still capable of properly sealing the
bearing cavity. If there is any question of condition, replace the
seal.
To replace the seal:
3-16
1. Pry the seal out of the hub with a screwdriver. Never
drive the seal out with the inner bearing as you may
damage the bearing.
2. Apply a sealant, such as PERMATEX, to the outside of the
new seal.
NOTE: Permatex sealant should not be used on rubber encased
seals.
3. Tap the new seal into place using a clean wooden block.

Bearing Adjustment

If the hub has been removed or bearing adjustment is
required, the following adjustment procedure must be fol-
lowed:
1. Rotate the hub assembly slowly while tightening the
spindle nut to approximately 50 ft.lbs. (68 Nm).
2. Loosen the spindle nut to remove the torque. DO NOT
ROTATE THE HUB.
3. Finger tighten the spindle nut until just snug.
4. Back the spindle nut out slightly until the first castella-
tion lines up with the cotter key hole and insert the cot-
ter pin.
5. Bend over the cotter pin legs to secure the nut.
NOTE: The nut should be free to move with the only restraint
being the cotter pin.
3121200