Isuzu C240 - Page 41

TCM sop MANUAL
V Important Operations
4 Timing Gear Case
After the timing gear case removal, measure the timing
gear backlash.
Timing Gear Backlash Measurement
1) Set a dial indicator to the timing gear to be
measured.
Hold both the gear to be checked and the adjoining
gear stationary.
2) Move the gear tooth side to side in the backlash.
Take the indicator reading of the backlash.
Timing Gear Backlash (TIR) mm (in)
Standard Limit
0.10 - 0.17 (0.004 - 0,007) 0.30 (0.012)
TIR = Total Indicator Reading
If the measured value exceeds the specified limit, the
gear must be replaced.
Idler Gear End Play Measurement
Insert a feeler gauge between the idler gear and the
thrust collar to measure the gap and determine the idler
gear end play.
If the measured value exceeds the specified limit, the
thrust collar must be replaced.
Idler Gear End Play mm (in)
Standard Limit
0.07 (0.003) 0.2 (0,008)
4 Injection Pump with Driver Gear
® (In-Line Type)
The injection pump can be removed after the idler gear
removal.
1) Remove the injection pump fixing bolt @ and ®.
2) Pull the injection pump out free from the engine
front plate.
Pump drive gear
10)
[Engine front plate: