Mitsubishi S4Q User Manual page 44

TIMING GEARS, CAMSHAFT AND OIL
PAN
Figure 59 Removing crankshaft pulley
Figure 60 Removing timing gear case
Figure 61 Measuring timing gear backlash
44 / 174
1.
Bolts
Make sure the bar will not come off when removing
(M12 x 1.25 mm)
the pulley.
[0.47 x 0.049 in.]
2.
The front plate is bolted inside the gear case. Do not
attempt to remove the plate with the case by tapping.
3.
Backlash between
crankshaft gear and
idler gear
Backlash between
idler gear and
camshaft gear
Backlash between
injection pump drive
gear and idler gear
ENGLISH
ENGINE MAIN PARTS
Removing crankshaft pulley
1) Install two bolts (M12 x 1.25 mm [0.47 x 0.049
in.]) to the rear end of the crankshaft and put a
bar between the bolts to hold the crankshaft,
as shown in the illustration.
2) Remove the pulley from the crankshaft.
CAUTION
Removing timing gear case
Remove the timing gear case with the oil pump
drive gear and idler gear from the crankcase. Pull
the case straight off the locating dowels.
CAUTION
Measuring timing gear backlash
Measure the backlash betw een the gears and
make a record of the measurements to be referred
to at the time of assembly. If the backlash exceeds
the service limit, replace the gears.
Assembly
Item
Standard
0.05 to 0.15
[0.0020 to 0.0059]
0.04 to 0.16
[0.0016 to 0.0063]
Service Manual Mitsubishi SQ-Series diesel engines
Unit: mm [in.]
Service
Limit
0.25
[0.0098]
Version 08/2004