JLG 510AJ Service Manual - Manual (Page 43)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-1
SECTION 3. CHASSIS AND TURNTABLE
3.1 TIRES & WHEELS
Tire Inflation
The air pressure for pneumatic tires must be equal to the air
pressure that is stenciled on the side of the JLG product or rim
decal for safe and proper operational characteristics.
Tire Damage
For pneumatic tires, JLG Industries, Inc. recommends when
any cut, rip, or tear is discovered that exposes sidewall or tread
area cords, remove the JLG product from service immediately.
Arrangements must be made for replacement of tire or tire
assembly.
For polyurethane foam filled tires, JLG Industries, Inc. recom-
mends when any of the following are discovered, remove the
JLG product from service immediately. Arrangements must be
made for replacement of the tire or tire assembly.
• a smooth, even cut through the cord plies which
exceeds 3 inches (7.5 cm) in total length
• any tears or rips (ragged edges) in the cord plies
which exceeds 1 inch (2.5 cm) in any direction
• any punctures which exceed 1 inch in diameter
• any damage to the bead area cords of the tire
If a tire is damaged but is within the above noted criteria, the
tire must be inspected on a daily basis to ensure the damage
has not propagated beyond the allowable criteria.
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
• Approved for the application by the tire manufacturer
(including inflation pressure and maximum tire load)
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 all tires are inflated to pressure recommended by JLG.
Due to size variations between tire brands, both tires on the
same axle should be the same.
Wheel Replacement
Rims installed on each product model have been designed for
stability requirements which consist of track width, tire pres-
sure, and load capacity. Size changes such as rim width, center
piece location, larger or smaller diameter, etc., without written
factory recommendations, may result in an unsafe condition
regarding stability.
Wheel Installation
WHEEL NUTS MUST BE INSTALLED AND MAINTAINED AT
THE PROPER TORQUE TO PREVENT LOOSE WHEELS, BRO-
KEN STUDS, AND POSSIBLE DANGEROUS SEPARATION OF
WHEEL FROM AXLE. USE ONLY NUTS MATCHED TO WHEEL
CONE ANGLE.
Tighten lug nuts to proper torque to prevent wheels from
coming loose. If you do not have a torque wrench, tighten fas-
teners with a lug wrench, then immediately have a service
garage or dealer tighten lug nuts to proper torque. Over-tight-
ening will result in breaking studs or permanently deforming
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 stages. Following recommended
sequence, tighten nuts per wheel torque chart.
3. Torque wheel nuts after first 50 hours of operation and
after each wheel removal. Check torque every 3 months
or 150 hours of operation.
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
40 ft-lb (55 Nm) 100 ft-lb (130 Nm) 170 ft-lb (255 Nm)