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TM 9-2320-386-24-1-2
0309 00
ROCKER ARM ASSEMBLY AND PUSHROD MAINTENANCE (Contd)
CLEANING AND INSPECTION
WARNING
Volatile mineral spirits burn easily and fumes can explode.
Do not smoke or allow open flame nearby when using mineral
spirits. Failure to do so may cause injury to personnel.
1.
Clean all rocker arm assembly parts in mineral spirits.
2.
Inspect shaft (8), shaft support assembly (9), and rocker arms (4), (5), and (7) for bends, scrapes,
scratches, cracks, grooves, and pits. Replace part(s) if damaged.
3.
Measure outside diameter of shaft (8) with 0-1-in. micrometer. Outside diameter should be 0.9742-
0.9750 in. (24.745-24.765 mm). Replace shaft support assembly (9) if outside diameter of shaft (8) is
not within limits.
4.
Measure inside diameter of bearings (6) for rocker arms (4), (5), and (7) with telescope gauge and 0-1-in.
micrometer. Inside diameter should be 0.9775-0.9759 in. (21.829-24.788 mm). Replace bearing (6) if
inside diameter is not within limits (task c.).
5.
Inspect fuel injector pushrod (10) and valve pushrods (11) for wear, straightness, and cracks. Replace if
damaged.
DISASSEMBLY
Remove bearing (6) from rocker arms (4), (5), and (7).
ASSEMBLY
1.
Apply lubricating oil to shaft (8), shaft support assembly (9), bearing (6), and bore of rocker
arms (4), (5), and (7).
2.
Align oil port in bearing (6) with oil port in each rocker arm (4), (5), and (7) and install bearing (6)
in each rocker arm (4), (5), and (7).
INSTALLATION
1.
Install setscrew (2) and jamnut (1) on each rocker arm (4), (5), and (7).
2.
Install rocker arms (7), (5), and (4) and shaft support (3) on shaft support assembly (9).
CAUTION
Ensure each pushrod engages a button in rocker arm. Failure to
install rocker arms correctly may result in damage to equipment.
3.
Install fuel injector pushrod (10) and valve pushrods (11) into cylinder head (15).
4.
Install rocker arm assembly (14) and anchor (12) on cylinder head (15) with four screws (13).
Tighten screws (13) 13-23 lb-ft (18-31 Nm).
ADJUSTMENT
1.
Perform intake and exhaust valve clearance adjustment (WP 0311 00).
2.
Perform fuel timing adjustment (WP 0322 00).
3.
Perform fuel setting adjustment (WP 0323 00).
0309 00-4

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