TM 5-3805-281-24-2
Cylinder Head and Valves
3. Inspect rocker arm shaft (A) for severe scratching,
scoring, or excessive wear at points of rocker arm
contact. Measure rocker arm and shaft. Compare with
specifications given below
Rocker Arm Assembly--Specification
I.D. ................................................................................. 19.07--19.10 mm
(0.7507--0.7520 in.)
Shaft O.D....................................................................... 19.01--19.05 mm
(0.7484--0.7500 in.)
NOTE: Wear could indicate weak valve springs, bent
Rocker Arm Parts
push rods, or loose rocker arm shaft clamps.
4. Check rocker arm adjusting nut (C) and screw (B) for
damage. Visually inspect rocker arm for hairline cracks.
Replace if necessary.
IMPORTANT: Be sure all oil holes in rocker arm shaft
are clean and open.
5. Clean all rocker arm parts with clean solvent. Dry with
compressed air.
RG,RG34710,1075
1923OCT972/3
6. Check for cups or concave wear (A) on ends of rocker
arms where they contact wear caps.
7. Examine spacer springs on shaft between rocker arms.
Be sure they are strong enough to exert a positive
pressure on rocker arms.
NOTE: If the rocker arm has been damaged by a valve
failure, replace it and the push rods when
replacing valves.
8. Roll rocker arm shaft and push rods on a flat surface
to check for bends or distortion. Replace parts as
Rocker Arm Wear Area
necessary.
RG,RG34710,1075
1923OCT973/3
11-107