13.14 Wheel Changing
WARNING. Serious accidents, including fatalities, have
been caused by unsafe practices during wheel/tyre
changing and when inflating tyres.
When using jacks to lift or support the machine:
a) Use a jack with sufficient lifting capacity and
extension range for lifting the machine. Refer to
Table 6 for jack specifications;
b) Use the jacking point identified in the figure 13;
c) Position axle stands to give additional support;
d) Apply the handbrake and position chocks against
the wheels to prevent movement.
e) Where possible carry out the work on firm level
ground
Tyre/wheel repair and replacement should only be carried
out by competent staff. If in doubt seek help from
professional service personnel.
If it is necessary to remove a wheel, place a jack
underneath the axle beam, loosen the wheel nuts and
raise the machine. Place an axle stand underneath the
machine, remove wheel nuts completely and remove the
wheel. Refit the wheel and tighten the wheel nuts to the
torque in 13.15.
Table 6. Jack requirements
Figure 13. Jacking point.
13.15 Wheel Nuts
Table 7. Wheel nut torques.
Check the wheel nuts are tight:
Before using a new machine.
After it is used for the first time.
After it is used fully loaded for the first time
After the first month
Every 6 months or after 500 hours use.
The recommended wheel nut torque is listed in table 7.
Always cross tighten the wheel nuts.
NOTE: Once the nuts are allowed to work loose, it may
be impossible to keep them tight and new nuts and studs
will be required. In extreme cases, damage to the wheel
rims and hubs may result.
NOTE: Always use a torque wrench to reach the correct
torque setting. Do not use an impulse wrench to
complete tightening because it can cause excessive
tightening of the wheel nuts which can cause deformation
of the wheel or failure of the wheel studs.
13.16 Tyre Pressures
WARNING: Check tyre pressures regularly, inflate
to the pressures shown in the following table when
the tyre is cold. Incorrect inflation can be dangerous.
Table 8. Tyre pressures.
25
Tyre Size Tomahawk 7100, 7150, 8100,
8150, 8500 & 8555
Pressure bar (psi)
10.0/75-15.3 2.0 ( 29 )
11.5/80-15.3 1.2 ( 17 )
12.5/80-15.3 1.2 ( 17 )
7.50 - 16.0 (14PR) 5.8 ( 84 )
Tyre Size Tomahawk 9500 & 1010
Pressure bar (psi)
305/55 R22.5 7 (100)
385/55 R22.5 5.8 ( 84 )
Model
Thread
Stud
Grade
Conical
Nuts
Torque
Nm (lb.ft)
Nut &
Spherical
Washer
Torque
Nm (lb.ft)
7100 M18 x 1.5 10.9 360 (265) 360 (265)
8100 M18 x 1.5 10.9 360 (265) 360 (265)
8500 M18 x 1.5 10.9 360 (265) 360 (265)
9500 M18 x 1.5 10.9 360 (265) 360 (265)
1010 M18 x 1.5 10.9 360 (265) 360 (265)
Jacking point
Model
Minimum
Lifting
Capacity
(kg)
Tyres
Height Range
Required (mm)
7100
7150
8100
8150
8500
8555
3000
10.0/75-15.3 320 - 400
11.5/80-15.3 360 - 440
12.5/80-15.3 380 - 460
18 x 7-8 340 - 420
9500 355/50 R22.5 390 - 470
1010 385/55 R22.5 420 - 500
5000
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