JLG 10MSP Service Manual - Manual (Page 36)

SECTION 3 - BASE COMPONENTS
3-4 – JLG Lift – 3121228
3.3 DRIVE AND CASTER WHEELS
Tire Wear and Damage
Inspect tires periodically for wear or damage. Tires with
worn edges or distorted profiles require replacement.
Tires with significant damage in the tread area or side wall,
require immediate evaluation before placing the machine
into service.
Wheel and Tire Replacement
Replacement wheels must have the same diameter and
profile as the original. Replacement tires must be the
same size and rating as the tire being replaced.
Wheel Installation
It is extremely important to apply and maintain proper
wheel mounting torque.
WHEEL LUG NUTS MUST BE INSTALLED AND MAINTAINED AT
THE PROPER TORQUE TO PREVENT LOOSE WHEELS, BROKEN
LUG NUTS, AND POSSIBLE SEPARATION OF WHEEL FROM THE
HUB. BE SURE TO USE ONLY THE LUG NUTS MATCHED TO THE
CONE ANGLE OF THE WHEEL.
Tighten the lug nuts to the proper torque (see Table 3-1) to
prevent wheels from coming loose. Use a torque wrench
to tighten the fasteners. If you do not have a torque
wrench, tighten the fasteners with a lug wrench, then
immediately have a service garage or dealer tighten the
lug nuts to the proper torque. Over-tightening will result in
breaking the lug nuts or permanently deforming the
mounting holes in the wheels. The proper procedure for
attaching wheels is as follows:
1. Start all lug nuts by hand to prevent cross threading.
DO NOT use a lubricant on threads or nuts.
2. Tighten lug nuts in the following sequence.
3. The tightening of the lug nuts should be done in
stages. Following the recommended sequence,
tighten lug nuts per wheel torque.
4. Wheel lug nuts should be torqued after the first 50
hours of operation and after each wheel removal.
Check torque every 3 months or 150 hours of opera-
tion.
(Front) Caster Wheel - Installation
Figure 3-2. Wheel Lug Nut Tightening Sequence
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
20-30 ft lbs
(28 - 42 Nm)
65-80 ft lbs
(91 - 112 Nm)
105 -120 ft lbs
(142 - 163 Nm)
Front Caster Wheel Installation
1. Snap Ring
2. Upper Bearing (a)
3. Lower Bearing (a)
4. Spindle Shaft Seal 5. Spindle/Axle Assy.
6. Caster Wheel (b)
7. Snap Ring (c)
NOTE: Base is shown cutaway for illustrative purposes only.
(a) If replacing bearing, pack bearing completely full of
grease before assembling, use (JLG P/N-3020029 -
Mobil SHC 460 Synthetic or equivalent), tap in evenly
until seated.
(b) Coat the axle shaft with Loctite Moly Paste lubricant
before assembling wheel. Wheel axle bearings are
maintenance free. (Original spoke wheel mounts same)
(c) After installing the wheel and just before installing
the Snap Ring, wipe the end of the axle clean and coat
the end of the axle with Clear Varnish.