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TM 9-2320-386-24-1-2
0358 00
VALVE SEAT MAINTENANCE (Contd)
NOTE
All valve seats are replaced the same. This procedure covers one pair.
REMOVAL
Press valve seats (2) from cylinder head (1).
CLEANING AND INSPECTION
.WARNING.
Skysol-100 mixture is combustible. Use mechanical ventilation whenever
product is used in a confined space, is heated above ambient
temperatures, or is agitated. DO NOT use or store near heat, sparks,
flame, or other ignition sources. Keep container sealed when not in use.
Contact with Skysol-100 may cause skin irritation. Use chemical resistant
gloves. In case of skin contact, remove any contaminated clothing and
wash skin thoroughly with soap and water. Wash contaminated clothing
before reuse. Eye contact may cause irritation, tearing, or blurring of
vision. Use face shield or goggles when eye contact may occur. In case of
eye contact, flush eyes with large amounts of water for at least fifteen
(15) minutes or until irritation subsides. Inhalation may cause irritation
to upper respiratory passages. DO NOT have food or drink in the vicinity.
1. Clean valve seats (2) with Skysol-100 and dry with lint-free cloth.
2. Clean and polish valve seats (2) with cloth.
3. Using bevel protractor, inspect valve seats (2) for proper angle.
a. Intake valve seat 29 - 31.
b. Exhaust valve seat 44 - 46.
c. If valve seat does not conform, perform valve seat grinding task.
INSTALLATION
NOTE
Valve seats for intake and exhaust valves are different. Use the
appropriate valve seat when performing installation.
Press valve seats (2) on cylinder head (1).
GRINDING
CAUTION
Ensure valve seat grinder is in alignment before work begins. Grinding
valve seats with tooling out of alignment will result in damage to
equipment.
Grinder wheels are easily damaged. Working with damaged grinder
wheels may result in damage to equipment. Inspect grinder wheels before
grinding valve seats.
NOTE
Valves and valve seats that are correctly machined do not require the use
of a lapping compound to make an air tight seal.
1. Grind valve seat (2) to proper angle (cleaning and inspection task, step 3).
2. Perform cleaning and inspection task.
3. Install valves (WP 0355 00).
0358 00-2

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