SECTION 3 - BASE COMPONENTS
31215825
3-3
3.3 DRIVE/ELEVATION CUT-OUT SWITCH
INSTALLATION
3.4 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 sig
-
nificant damage in the tread area or side wall, require immedi
-
ate evaluation before replacing 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 AXLE. BE SURE TO USE ONLY THE LUG
NUTS MATCHED TO THE CONE ANGLE OF THE WHEEL.
Tighten the lug nuts to the proper torque to prevent wheels
from coming loose. Use a torque wrench to tighten the fasten
-
ers. 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-tighten
-
ing will result in breaking the lug nuts or permanently deform
-
ing 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 operation.
Figure 3-4. Drive/Elevation Switch Cut-Out Switch
Installation
1.
Mounting Screws (a)
2.
Proximity Switch (b)
3.
Switch Mounting Block
4.
Frame Mounting Holes
NOTE:
Elevate and block platform to gain access to switch.
(a) Apply Medium Strength Threadlocking Com
-
pound to mounting screw threads on final assembly.
Figure 3-5. Wheel Lug Nut Tightening Sequence
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage
2nd Stage
3rd Stage
20-30 ft lbs
(27 - 41) Nm)
65-80 ft lbs
(88 -108 Nm)
105 -120 ft lbs
(142 - 163 Nm)
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