-------------CHAPTER1
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Balancer Removal
Balancer
Gear
Backlash
1. Dial Indicator
2.
Backlash Check
1 . Remove the oil pan to expose the balan-
cer
and using a dial indicator gauge,
check
backlash between crankshaft gear
and
balancer drive gear, Figure 49. Posi-
tion the dial plunger to the face
of
one
of
the drive
gear
teeth, then rock the
gear
to
measure backlash. Readings should be
taken
at
90°
intervals around the drive
gear
to 0.002--0.012
in
(0.05--0.30mm). If
the specification is exceeded, install
new
balancer gears.
Disassembly
1. Extract the roll pins securing the shafts to
the housing and disassemble, Figure 50.
50
Inspection and repair
1 . Measure the outside diameter
of
shafts
~nd the inside diameter of the
gear
bush-
ings and establish if clearance is to speci-
fication. If exceeded, replace shaft
and / or
gear
assembly:
0.0002--0.008 in
(0.005-0.020mm).
2. Examine shafts and balancer
gear
teeth
for
wear
and damage
and
replace as nec-
essary. Ensure lubrication holes in the
shafts are free from obstruction upon
re-
assembly.
For crankshaft balancer
gear
repair and as-
sembly, refer to the crankshaft section.
Re-Assembly
1 . Position balancer gears and thrust wash-
ers in the housing, with timing
marks
aligned and facing the roll pin side
of
the
balancer. Install shafts from the opposite
side and secure with roll pins.
2.
Using a feeler gauge measure
end
float
of
assembled gears is to the specification:
0.008-0.020
in (0.20-0.51 mm).
3. Position a dial indicator gauge to the tooth
of
one
gear
and hold the other firmly.
Rocking the free gear, measure backlash
at
90°
intervals around the
gears
to
0.002--0.010 in (0.05--0.25mm).
Installation
A1-47A
D(i
Balancer Gears
1.
Roll Pin
3.
Thrust Washers
5.
Thrust Washers
2. Housing
4. Driven Gears
6. Shafts
27
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