765 / 1906
GEAR BOX
60
21.Loosen and remove outer nuts (12Nos.) on con-
nection adaptor housing to the rear half and take
out the adaptor along with selector heads.
22. After the shim selection at rear end front shim
selection has to be done (for counter and main
shaft) as per the procedure given below:
FRONT COVER SHIM SELECTION PROCE-
DURES
A. DRIVE SHAFT (SHIM SELECTION)
Calculate the shim values as illustrated below:
Measure the front cover depth along with the
gasket at the drive shaft end. Consider this as
“P”. Let this depth be 5.75 mm.
Measure the drive shaft bearing projection over
housing face. Consider this as “Q”. Let this pro-
jection be 5.50 mm.
Calculate the difference between “P” & “Q”. Let it
be “R”.
R = P – Q
R = 5.75 – 5.50 mm
R = 0.25 mm
Thickness of shim required to maintain the end
play of 0.07 to 0.1mm
= R – (0.1 Specified end play)
= 0.25 – 0.1 mm
= 0.15 mm
B. COUNTER SHAFT (SHIM SELECTION)
Calculate the shim values as illustrated below:
Measure the front cover depth along with the
gasket at the counter shaft end. Consider this as
“T”. Let this depth be 4.75 mm.