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TM 5-4320-305-24
4-6. REPAIR CYLINDER HEAD ASSEMBLY AND ROCKER ARMS (Continued)
CLEANING/INSPECTION:
WARNING
Death or serious injury could occur if diesel fuel oil is not handled carefully. Use
in a well-ventilated area away from open flame, arcing equipment, ignition
sources, heaters, or excessive heat. Always store fuel in proper, marked
containers. DO NOT SMOKE.
Death or serious injury could occur if compressed air is directed against the skin.
Do not use compressed air for cleaning or drying unless the pressure is/has been
reduced to 30 psi (2.11 kgcm2) or less. When working with compressed air always
use chip guards, eye protection, and other personal protective equipment.
1
Mount cylinder head (1) on cylinder head clamping stand No. 120900 and clamping plate No. 120910. Clean with a
clean cloth dampened with diesel fuel oil. Use wire brush where necessary. Dry with compressed air.
2
Inspect cylinder head (1) for cracks, rust, corrosion, and excessive heat damage. Inspect for accumulated carbon
around injector spray tips (2). Replace cylinder head if it is damaged.
3
Check that cylinder head seat (3) is smooth and flat. If not, use a depth gage (4) to measure distance from the
cylinder head bottom (5) to cylinder head seat (3) or sealing surface. If the cylinder head bottom-to-cylinder head
seat distance is between 0.2283 inch (5.8 mm) and 0.2480 inch (6.3 mm), the cylinder head seat can be smoothed
and flattened by remachining. If distance is not within the specified limits, replace cylinder head (1).
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