Backlash Adjustment [*2] - Honda BF135A Manual

17. BACKLASH ADJUSTMENT [*2]

a. FORWARD BEVEL GEAR BACKLASH
Backlash adjustment must be made after adjustment of each
gear shim (P. 14-77).
Install the parts except the water pump in the gear case (P. 14-
51, 56 and 73).
1) Hold the propeller shaft securely with the special tool as
shown, and tighten the puller bolt to the specified torque.
TOOLS:
Puller jaws
Puller bolt
TORQUE: 5 N . m (0.5 kgf . m, 3.6 lbf . ft)
Turn the vertical shaft five to ten turns clockwise to fit the
bevel gear bearing.
2) Attach the special tool to the vertical shaft as shown, and
adjust the dial indicator so its needle is at the line "2" of the
special tool (backlash indicator tool).
TOOLS:
Backlash indicator tool
Backlash indicator attachment
3) Turn the vertical shaft lightly right and left and record the
dial indicator reading.
Measure the backlash at the four points (by turning the
vertical shaft 90˚) in the same manner.
NOTICE
Do not turn the propeller shaft when turning the vertical
shaft.
4) Obtain the forward bevel gear backlash using the dial
indicator runout and the following formula.
Formula:
Dial indicator runout ÷ 0.86 = Backlash
Example:
When dial indicator runout is 0.195 mm (0.0077 in):
0.195 ÷ 0.86 = 0.23
Therefore, the backlash is 0.23 mm (0.009 in).
Standard value
5) If the backlash is too large, reduce the forward bevel gear
shim thickness and recheck the backlash.
If the backlash is too small, increase the forward bevel gear
shim thickness and recheck the backlash.
NOTICE
Use the special tool when 50 x 90 x 28 mm taper bearing
outer race is removed to adjust the backlash again (P. 14-
60).
14-85
07SPC-ZW0010Z
07SPC-ZW0011Z
07SPJ-ZW0030Z
07SPK-ZW10100
0.10 – 0.30 mm
(0.004 – 0.012 in)
[1]
PULLER BOLT
07SPC-ZW0011Z
[2]
PULLER JAWS
07SPC-ZW0010Z
[1]
BACKLASH
INDICATOR
ATTACHMENT
07SPK-ZW10100
90˚
90˚
90˚ 90˚
[3]
[4]
DIAL INDICATOR
VERTICAL
Adjust the dial indicator needle at
SHAFT
line "2" of the backlash indicator
tool.
[2]
BACKLASH
INDICATOR TOOL
07SPJ-ZW0030Z