SECTION 3 - CHASSIS & SCISSOR ARMS
3-32
3121788
Tire Wear and Damage
The tire and rim assemblies installed on machines have
been approved by the tire manufacturer for applications
in which those products are intended to be used. The tire
and rims installed on each product model have been
designed for stability requirements, which consist of track
width, tire compound, and load capacity. Tire changes
such as rim width, centerpiece location, larger or smaller
diameter, tire compound, etc., without written manufac-
turers approval, could result in an unsafe condition
regarding stability.
The tires and rims installed on machines are to be
inspected daily as part of the daily walk-around inspec-
tion. JLG requires that the daily walk-around inspection be
performed at each operator change during a shift and at
each shift change.
Wheel and Tire Replacement
JLG recommends that any replacement tire be the same
size and brand as originally installed on the machine or
offered by JLG as an approved replacement. Please refer to
the JLG Parts Manual for the part number of the approved
tires for a particular machine model.
If any of the following is discovered during tire inspection,
measures must be taken to remove the JLG product from
service immediately. Arrangements must be made for
replacement of the tire(s) or tire assembly(s). Both tires/
wheels on the same axle must be replaced:
•
If the overall diameter of the tire is less than one of the
following:
406 x 127 Tire – 15.55 in. (395 mm) minimum
•
If any uneven wear is discovered.
A tire with significant damage in the tread area or
sidewall requires immediate evaluation before plac-
ing the machine into service. If a cut, tear, chunk, or
other discrepancy exceeds any one or more of the
following dimensions, the tire must be replaced:
3.0 in. (76 mm) long
0.75 in. (19 mm) wide
0.75 in. (19 mm) deep
•
If the metal wheel is visible at any point through the
tread area of the tire.
•
If more than one discrepancy exists in any quadrant of
the wheel (within 90 degrees of one another).
Wheel Installation
It is extremely important to apply and maintain proper
wheel mounting torque.
WHEEL SLOTTED NUTS MUST BE INSTALLED AND MAINTAINED AT THE
PROPER TORQUE TO PREVENT LOOSE WHEELS, A BROKEN NUT, AND
POSSIBLE SEPARATION OF WHEEL FROM THE AXLE.
Tighten the slotted nuts to the proper torque to prevent
wheels from coming loose. Use a torque wrench to tighten
the slotted nuts. The proper procedure for attaching
wheels is as follows:
1.
If not already installed, install shaft key (5)
to
shaft and align with wheel keyway, install wheel
and hub (3) onto tapered shaft (4).
2.
Start slotted nut (1)
by hand to prevent cross
threading. DO NOT use a lubricant on threads or
nut.
3.
Torque the slotted nut to 150 ft. lb. (203 Nm).
4.
Install cotter pin (2), if hole in slots do not align
with cotter pin hole on the tapered shaft, con-
tinue to turn nut clockwise to align nut with
hole. Do not loosen to align hole.
Figure 3-27. Wheel Installation
1.
Slotted Nut
2.
Cotter Pin
3.
Wheel and Hub Assembly
4.
Tapered Shaft
5.
Shaft Key
1
Go to
Discount-Equipment.com
to
order your
parts
