Rocker Arm Installation - Linhai HY740STL 2018 Service Manual

CHAPTER 3 ENGINE
M750L SERVICE MANUAL 18.0
ROCKER ARMS AND ROCKER ARM SHAFTS
INSPECTION
1. Inspect:
⚫Cam lobe contact surface 
⚫Adjuster surface 
Wear/Pitting/Scratches/Blue/Non-rotation
discoloration→Replace.
Inspection steps:
⚫Inspect the two contact areas on the rocker
arms for signs of unusual wear.
⚫Rocker arm shaft hole.
⚫Cam-lobe contact surface.
Excessive wear → Replace.
⚫Inspect the surface condition of the rocker arm
shafts.
Pitting/scratches/blue discoloration → Replace
or check lubrication.
⚫Measure the inside diameter A of the rocker arm
holes.
Out of specification → Replace.
Inside diameter (rocker arm ):
14.000- 14.018 mm
< Limit: 14.05 mm >
⚫Measure the outside diameter B of the rocker
arm shafts.
Out of specification → Replace.
Outside diameter(rocker arm shaft):
13.981- 13.991 mm
< Limit: 13.94 mm >

ROCKER ARM INSTALLATION

6. Lubricate:
⚫Molybdenum disulfide oil onto the rocker arm
and rocker arm shaft.
7. Install:
⚫Rocker Arm (exhaust)
CHAPTER 3 ENGINE PAGE 3- 28