Backlash Inspection/Gear Tooth Contact Pattern Check - Honda NSA700A DN-1 2009 Service Manual

FINAL DRIVE
BACKLASH INSPECTION/GEAR
TOOTH CONTACT PATTERN CHECK
NOTE:
Perform the backlash inspection and contact pattern
check wnenever you replace the final shaft, output
shaft, bearings, bearing holder and gear case. The
extension lines from the gear engagement surfaces
should intersect at one point.
BACKLASH INSPECTION
Set the output gear case in a vise w ith soft jaws.
Hold the output shaft with special tools.
TOOLS:
Shaft holder
Holder handle
Set a horizontal type dial Indicator on the final shaft
splines.
Turn the final shaft back and forth to read backlash.
STANDARD:
SERVICE LIMIT: 0.40 mm (0.016 in)
Remove the dial indicator and special tools. Turn
the final shaft 120° and measure backlash. Repeat
this procedure once more.
Compare the difference of the three measurements.
Backlash difference between measurements
SERVICE LIMIT: 0.10 mm (0.004 in)
IT the difference in measurements exceeds the ser­
vice limit, it indicates that the bearing is not
installed squarely or the case is deformed
Inspect the bearings and case.
If the backlash is excessive, replace the final shaft
shim with a thinner one.
If the backlash is too small, replace the final shaft
with
s h im
Backlash is changed by about 0.06 - 0.07 mm (0.002
- 0.003 in) when shim thickness is changed b / 0.10 mm
(0.004 in).
FINAL SHAFT SHIMS:
0.30 mm (0.012 in)
0.35 mm (0.014 in)
0.40 mm (0.016 in)
0.45 mm (0.018 in)
0.50 mm (0.020 in)
0.55 mm (0.022 in)
0.60 mm (0.024 in)
0.65 mm (0.026 in)
0.70 mm (0.028 in)
0.75 mm (0.030 in)
14-28
07PAB-0010100
(Not available in U.S.A.)
07PAB-0010400
(Not available in U.S.A.)
0.08 - 0.23 mm (0.003 - 0 009 in)
a th ic k e r o n e .
SHAFT HOLDER
FINAL SHAFT
OUTPUT SHAFT
FINAL SHAFT SHIM
POINT OF
INTERSECTION
FINAL SHAFT