JLG T500J, Service And Maintenance Manual

Page: 55 / 306

SECTION 3 - CHASSIS & TURNTABLE
3121200 3-19
Tire Replacement
JLG recommends a replacement tire be the same size, ply and
brand as originally installed on the machine. Please refer to the
JLG Parts Manual for the part number of the approved tires for
a particular machine model. If not using a JLG approved
replacement tire, we recommend that replacement tires have
the following characteristics:
• Equal or greater ply/load rating and size of original
• Tire tread contact width equal or greater than original
• Wheel diameter, width, and offset dimensions equal to the
original
Unless specifically approved by JLG Industries Inc. do not
replace a foam filled or ballast filled tire assembly with a pneu-
matic tire. When selecting and installing a replacement tire,
ensure that all tires are inflated to the pressure recommended
by JLG. Due to size variations between tire brands, both tires
on the same axle should be the same.
Wheel Replacement
Replacement wheels must have the same diameter, width, and
profile as the original. Replacement tires must be the same
size, ply rating, and load range as the tire being replaced. Refer
to the Vehicle Identification plate on the chassis for wheel and
tire specifications.
Wheel Installation
It is extremely important to apply and maintain proper wheel
mounting torque.
WHEEL NUTS MUST BE INSTALLED AND MAINTAINED AT THE PROPER TORQUE
TO PREVENT LOOSE WHEELS, BROKEN STUDS, AND POSSIBLE DANGEROUS
SEPARATION OF WHEEL FROM THE AXLE. BE SURE TO USE ONLY THE NUTS
MATCHED TO THE CONE ANGLE OF THE WHEEL.
Tighten the lug nuts to the proper torque for the axle size on
your trailer, 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 break-
ing the studs or permanently deforming the mounting stud
holes in the wheels. The proper procedure for attaching
wheels is as follows:
1. Start all nuts by hand to prevent cross threading. DO
NOT use a lubricant on threads or nuts.
2. Tighten nuts in the following sequence:
3. The tightening of the nuts should be done in stages. Fol-
lowing the recommended sequence, tighten nuts per
wheel torque chart.
4. Wheel nuts should be torqued before first road use and
after each wheel removal. Check and torque after the
first 10 miles, 25 miles, and again at 50 miles. Check peri-
odically thereafter.
Lug Nuts (Bolts)
Lug nuts are prone to loosen right after a wheel is mounted to
a hub. When driving on a remounted wheel, check to see if the
lug nuts are tight after the first 10, 25 and 50 miles of driving
and before each tow thereafter.
CHECK LUG NUTS FOR TIGHTNESS ON A NEW TRAILER OR WHEN WHEEL(S)
HAVE BEEN REMOUNTED AFTER THE FIRST 10, 25 AND 50 MILES OF DRIVING.


METAL CREEP BETWEEN THE WHEEL RIM AND LUG NUTS WILL RESULT IN A
WHEEL COMING OFF, LEADING TO DEATH OR SERIOUS INJURY. TIGHTEN LUG
NUTS BEFORE EACH TOW.
Table 3-3. Wheel Torque Chart - ANSI, ANSI Export, CSA, Aus
TORQUE SEQUENCE - Ft Lbs (Nm)
1st Stage 2nd Stage 3rd Stage
20-25
(25-35)
50-60
(70-80)
90-120
(122-163)
Table 3-4. Wheel Torque Chart - CE
TORQUE SEQUENCE - Ft Lbs (Nm)
1st Stage 2nd Stage 3rd Stage
50
(70)
125
(170)
221
(300)