DE08TS Diesel Engines Maintenance
Rocker arm assembly
1. Disassembly
a. Disassemble the snap rings that are located at
both ends of rocker arm shaft by a plier.
b. Disassemble in the order of washer, rocker arm
bracket, rocker arm spring, rocker arm.
2. Inspection of rocker arm assembly
a. Rocker arm shaft
• Rocker arm shaft run-out
Place the rocker arm shaft on two V blocks and
inspect the shaft for bend using a dial gauge.
If the amount of this run-out is small, press the shaft
with a bench press to correct the run-out Replace the
shaft if the measured value exceeds the limit.
• Rocker arm shaft diameter
With an outside micrometer, measure the rocker arm
shaft diameter at the point where the rocker arms
have been installed. Replace the rocker arm if the
amount of wear is beyond the specified limit.
b. Rocker arm
• Visual check
Visually check the face of the rocker arm in contact
with the valve stem end for scores and step wear. If
the wear is small, correct it with an oil stone or grind-
ing paper of fine grain size. Rocker arm with a con-
siderable amount of step wear should be replaced.
• Rocker arm bushing diameter
Measure the inside diameter of the rocker arm bush-
ing with an inside micrometer or vernier calipers, and
compare the measured values with the rocker arm
shaft diameter. If the clearance exceeds the limit,
replace either bushing or shaft, whichever worn
more.
EA9M3014
EDM2037I
EA8M3008
41
Limit 0.2 mm
Standard Limit
N
23.978 ~
N
23.959
mm
N
23.75
mm
Standard Limit
0.020 ~ 0.093
mm
0.3 mm or less
To Next Page
Loading...
Need help?
General
