Page 1021 - Workshop Manual - Aumark (BJ1051)

33-3
Transmission axle-transmission axle assembly
On-vehicle inspection

1. Inspect the vibration of transmission system
(a). Inspect the dynamic balance of the front wheels and adjust if necessary (Refer to “chapter 23
wheels and tires-wheels and tire assembly, adjustment”)
(b). Inspect the dynamic balance of the rear wheels and adjust if necessary (Refer to “chapter 23
wheels and tires-wheels and tire assembly, adjustment”)
(c). Carry out driving test, inspect whether the transmission system vibrates during the driving.
2. Inspect the dynamic balance of transmission axle
(a). Rotate the rear wheels and make the transmission axle rotate, measure the radial run-out of the
front, middle and rear parts of the transmission axle.
Standard value: 0.5 mm
Limit value: 0.6 mm
• If the radial run-outs of the front and middle parts are beyond the limit value, replace with a
new transmission axle.
• If the radial run-outs of the front and middle parts are within the limit range, but the radial
run-out of the rear part is beyond the limit value, mark the high point of the rear end and go
on the next step.
• If the radial run-outs of all the parts are within the limit range, go on the next step.
(b). Rotate the transmission axle and the main reducing gear relatively for 1/2 revolution. (Refer to
“chapter 05 transmission axle-transmission axle assembly, replacement”)
• If rotate them for 1/4 revolution, the inspection and adjustment can be carried out more
accurately.
(c). Inspect the radial run-out of the rear part of the transmission axle.
• If the radial run-out of the rear part is beyond the limit value, mark the high point and go on
the next step.
• If the radial run-out of the rear part is within the limit range, inspect whether the 33
transmission system vibrates during the driving test. If it vibrates, mark the high point and
go on the next step.
(d). Compare the 2 high points marked in the
steps above.
• If the two points are very near and
their distance is within 20 mm, replace
with a new transmission axle.

• If the two high points are at two
opposite sides of the transmission axle,
it means that the flange of the main
reducing gear is the principal cause of
the vibration.

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