Idler Gear And Idler Gear Shaft - Isuzu A-4BG1 Workshop Manual

ENGINE ASSEMBLY II 4-S
t
.
l!El :
Rocker Arm Shaft and Rocker Arm Clearance
1. Use a vernier caliper to measure the rocker arm
bushing inside diameter.
mm (in)
F----- I
Standard Limit
I
I
-Rocker Arm Bushing
19.01-I 9.03
19.05
Inside Diameter
(0.749-0.750)
(0.751)
2. Measure the rocker arm shaft outside diameter.
Replace either the rocker arm or the rocker arm shaft
if the clearance exceeds the specified limit.
mm (in)
I
Standard
I
Limit
I
L +
Rocker Arm Bushing
and Rocker Arm
0.01-0.05 02
Shaft Clearance
(0.0004-0.0020) (O.Oi79)
J
3. Check that the rocker arm oil port is free of obstruc-
tions.
If necessary, use compressed air to clean the rocker
arm oil port.
IDLER GEAR AND IDLER GEAR SHAFT
1. Use a micrometer to measure the idler gear shaft
outside diameter.
If measured diameter exceeds specified limit,
replace the idler gear shaft.
mm (in)
I ~
Standard Limit
Idler Gear Shaft
Outside Diameter
44.945-44.975 44.9
(1.7694771)
(1.768)