Measuring The Middle Gear Backlash; Adjusting The Middle Gear Backlash - Yamaha VMAX 2009 Service Manual

2
L LLL L LLL L L LLL L
2. Check:
• Universal joint operation
Rough operation → Replace the universal
joint or bearing.
TIP
Lift the universal joint "1" and make sure that it
falls freely when released.
EAS25880
MEASURING THE MIDDLE GEAR
BACKLASH
1. Remove:
• Universal joint (middle gear side)
• Middle gear side cover
2. Measure:
• Middle gear backlash
Out of specification → Refer to "ADJUSTING
THE MIDDLE GEAR BACKLASH" on page
5-113.
Middle gear backlash
0.05–0.10 mm (0.002–0.004 in)
M MMM M MMM M M MMM M
a. Hold the middle drive pinion gear "1" with the
middle gear backlash tool "2".
TIP
Finger tighten the middle gear backlash tool
bolts.
Middle gear backlash tool
90890-04080
L LLL L L LLL L L LLL L
1
M MMM M M MMM M M MMM M
b. Make sure the dial gauge plunger contacts
the measuring point on the centerline of the
yoke bearing hole as shown.
1
LLL
2
c. While gently turning the universal joint yoke
back and forth, measure the middle gear
backlash.
TIP
Measure the middle gear backlash at four posi-
tions. Rotate the universal joint yoke 90° each
time and observe the reading on the dial gauge.
L LLL L LLL L
EAS25900

ADJUSTING THE MIDDLE GEAR BACKLASH

1. Loosen:
• Middle driven pinion gear bearing housing
bolts
2. Remove:
• Middle driven pinion gear shim(s)
3. Tighten:
• Middle driven pinion gear bearing housing
bolts
ECA2S31049
NOTICE
Do not overtighten the middle driven pinion
gear bearing housing bolts or you may ob-
tain too little middle gear backlash and dam-
age the middle gears. If the bolts are
overtightened, loosen them until the crank-
MMM
case-to-middle-driven-pinion gear-bearing-
housing clearance is within specification, as
stated below. Then, repeat all of the previous
steps.
5-113
MIDDLE GEAR
L LLL L L LLL L L LLL L
Middle driven pinion gear bearing
housing bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
L LLL L LLL