Mitsubishi S4Q User Manual page 50

TIMING GEARS, CAMSHAFT AND OIL
PAN
Idler gear shaft puller
Figure 74 Replacing idler gear shaft
Measuring
points
Measuring
directions
Figure 75 Measuring cam lift
A
B
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3. Replacing idler gear shaft
To remove the shaft for replacement, use idler gear
shaft puller (MH061077).
NOTE
When installing a replacement shaft to the crankcase,
make sure the oil hole in the shaft points upward.
9.2.3 Camshaft
1. Checking lobe lift
To fine the lobe lift, use the procedure that follows:
1)
2)
3)
C
Lobe
lift
ENGLISH
ENGINE MAIN PARTS
Measure lobe height (A).
Measure base circle (B).
Subtract base circle (B) from lobe height (A).
The difference is lobe lift (C).
If the lobe lift is less than the service limit,
replace the camshaft.
Nominal
Item
Value
A=
+0.1
Inlet 46.916
– 0.3
valve [1.84709]
[lobe height]
A=
+0.1
Exhaust 45.944
– 0.3
valve [1.80882]
[lobe height]
Service Manual Mitsubishi SQ-Series diesel engines
Unit: mm [in.]
Assembly Service
Standard Limit
C= C=
6.684 6.184
[0.2631] [0.2435]
C= C=
7.344 6.844
[0.2891] [0.2694]
Version 08/2004