MIDDLE GEAR
5-114
IP
• Tighten the middle driven pinion gear bearing
housing bolts carefully, one thread turn at a
time only. Push in the middle driven pinion gear
bearing housing and then tighten the bolts to
specification.
• Clearance between the crankcase and the
middle driven pinion gear bearing housing
should be approximately 2 mm (0.08 in), when
measured with a thickness gauge “1”.
4. Hold the middle drive pinion gear.
5. Turn:
• Universal joint yoke
IP
While carefully tightening the middle driven pin-
ion gear bearing housing bolts in stages and in a
crisscross pattern, turn the universal joint yoke
back and forth until the dial gauge reads 0.05–
0.10 mm (0.002–0.004 in).
6. Measure:
• Crankcase-to-middle-driven-pinion gear-
bearing-housing clearance
(with a thickness gauge)
7. Select:
• Middle driven pinion gear shim(s) “1”
▼▼▼▼ ▼ ▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼▼▼▼
a. Shims are only available in 0.05 mm incre-
ments, therefore round off to the hundredth’s
digit of the calculated thickness and select
the appropriate shim with the following chart.
b. For example, the clearance between the
crankcase and the middle driven pinion gear
bearing housing is 0.46 mm. Therefore, the
chart instructs you to round off the 6 to 5.
Thus, you should use one 0.15 mm and one
0.30 mm shim.
Shims are supplied in the following thickness-
es.
▲▲▲▲ ▲ ▲▲▲▲▲▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
8. Loosen:
• Middle driven pinion gear bearing housing
bolts
9. Install:
• Middle driven pinion gear shim(s)
10.Tighten:
• Middle driven pinion gear bearing housing
bolts
11.Measure:
• Middle gear backlash
Out of specification → Refer to “MEASUR-
ING THE MIDDLE GEAR BACKLASH” on
page 5-113.
EAS25930
ALIGNING THE MIDDLE GEAR
IP
Aligning the middle gear is necessary when any
of the following parts are replaced:
• Crankcase
• Middle drive pinion gear
• Middle driven pinion gear
• Middle driven pinion gear bearing housing
1. Select:
• Middle drive pinion gear shim(s) “1”
• Middle driven pinion gear shim(s) “2”
1
1
Hundredth Rounded value
0, 1, 2 0
3, 4, 5, 6, 7 5
8, 9 10
Middle driven gear shim
Thickness (mm)
0.10 0.15 0.20 0.30 0.40 0.50
T
R
.
.
Middle driven pinion gear bearing
housing bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
LOCTITE®
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