14-41
9. BACKLASH ADJUSTMENT [*1]
a. FORWARD BEVEL GEAR BACKLASH
Backlash adjustment must be made after adjustment of each
gear shim (P. 14-35).
Install the parts except the water pump in the gear case (P. 14-
12, 17 and 31).
1) Hold the propeller shaft securely with the special tool as
shown, and tighten the puller bolt to the specified torque.
TOOLS:
Puller jaws
07SPC-ZW0010Z
Puller bolt
07SPC-ZW0011Z
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
07SPJ-ZW0030Z
Backlash indicator attachment
07SPK-ZW10100
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.
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).
NOTICE
[1]
PULLER BOLT
07SPC-ZW0011Z
[1]
BACKLASH
INDICATOR
ATTACHMENT
07SPK-ZW10100
[2]
BACKLASH
INDICATOR TOOL
07SPJ-ZW0030Z
[2]
PULLER JAWS
07SPC-ZW0010Z
[3]
DIAL INDICATOR
Adjust the dial indicator needle at
line “2” of the backlash indicator
tool.
90˚
90˚
90˚
[4]
VERTICAL
SHAFT
90˚
Standard value
0.10 – 0.30 mm
(0.004 – 0.012 in)
5) If the backlash is too large, increase the forward bevel gear
shim thickness and recheck the backlash.
If the backlash it too small, reduce the forward bevel gear
shim thickness and recheck the backlash.
Use the special tool when 50 x 90 x 28 mm taper bearing
outer race is removed to adjust the backlash again (P. 14-
28).
NOTICE