Shimming (regular rotation model)
8-41
Calculated value (B) = 0.70 mm “a”
Pinion distance measurement (M) =
0.52 mm “b”
Pinion shim (T3) thickness adjustment
= 0.18 mm
The current shim thickness must be
increased by 0.18 mm.
b. Calculate the new pinion shim (T3)
thickness.
• Use up to 3 shims to obtain the required shim
thickness. However, if the pinion shim thick-
ness is 1.21 mm or more, 4 shims may be
used.
• If the calculated shim thickness cannot be
obtained with a combination of the available
shims, increase or decrease the pinion dis-
tance measurement by 0.01 mm.
Calculation formula:
New pinion shim (T3) thickness = Cur-
rent pinion shim thickness + Shim
thickness adjustment
Use the following formula when the
shim thickness adjustment value is
positive.
Current pinion shim thickness = 0.70
mm
Shim thickness adjustment = 0.18 mm
New pinion shim (T3) thickness = 0.70
mm + 0.18 mm = 0.88 mm
Use the following formula when the
shim thickness adjustment value is
negative.
Current pinion shim thickness = 0.70
mm
Shim thickness adjustment = –0.09
mm
New pinion shim (T3) thickness = 0.70
mm + (–0.09 mm) = 0.61 mm
6. Remove:
• Special service tool
7. Install:
• Determined pinion shim (T3)
Measuring the forward gear backlash
and reverse gear backlash
• Spray anti-rust lubricant on the gear and
bearings before installation. Do not apply
gear oil to the parts. Otherwise, correct mea-
surements cannot be obtained.
• Keep the parts free of foreign material, such
as dirt and lint.
• When measuring the forward gear or reverse
gear backlash, use the shims of the specified
thickness for the forward gear shim (T1) and
reverse gear shims (T2), and use the shims
of the selected thickness for the pinion shims
(T3).
A. Pinion distance measurement (M)
B. Calculated value (B)
0.71
0.55
0.51 0.52 0.53 0.54 0.55
0.56
+0.18
0.57
0.58
0.59
0.66
0.68
0.69
0.70
0.72
A
B
b
a
Available shim thicknesses
Pinion shims
0.10/0.12/0.15/0.18/0.30/0.40/
0.50 mm (F250NST, F250SB,
F300FST, F300SB)
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