6-71
E
LOWR
SHIMMING (COUNTER ROTATION MODELS)
(FOR USA AND CANADA)
SELECTING THE PINION SHIMS
6
NOTE:
Find the shim thickness (T3) by selecting
shims until the specified measurement (M)
is obtained with the special tool.
6740
1. Measure:
• Specified measurement (M)
Out of specified value (M0)
→
Adjust.
Measuring steps
(1) Calculate the specified value (M0).
NOTE:
“P” is the deviation of the lower case
dimension from standard. It is stamped on
the trim tab mounting surface of the lower
case in 0.01-mm units. If the “P” mark is
missing or unreadable, assume a “P” value
of “0”, and check the backlash when the
unit is assembled.
Example:
If “P” is “+5”, then
M0 = 1.00 + (+5)/100 mm
= 1.00 + 0.05 mm
= 1.05 mm
If “P” is “–3”, then
M0 = 1.00 + (–3)/100 mm
= 1.00 – 0.03 mm
= 0.97 mm
Specified value (M0) =
1.00 + P/100 mm
M
6750
6A20
F+5
R-1
P+2
