TM 9-2320-272-24-2
4-12. CYLINDER HEAD REPLACEMENT
THIS TASK COVERS:
b. Installation
a. Removal
INITIAL SETUP:
APPLICABLE MODELS
EQUIPMENT CONDITION
M939/A1
SPECIAL TOOLS
Fuel crossover connectors and valve crossheads
Head holding fixture (Appendix E, Item 7)
Cleaning brush (Appendix E, Item 28)
l Engine fuel supply and return tubes removed
TOOLS
(para. 3-17).
General mechanic's tool kit (Appendix E, Item 1)
GENERAL SAFETY INSTRUCTIONS
Torque wrench (Appendix E, Item 145)
l Compressed air source will not exceed 30 psi
MATERIALS/PARTS
(207 kPa).
Cylinder head gasket (Appendix D, Item 94)
l Eyeshields must be worn when cleaning with
compressed air.
REFERENCES (TM)
TM 9-2320-272-24P
NOTE
All three cylinder heads are replaced the same way. Only one is
covered in this paragraph.
1. Following "outside-in" loosening sequence, remove twelve screws (2) and washers (3) from cylinder
head (4).
NOTE
l Assistant will help with step 2.
l Tag cylinder head for installation.
2. Remove cylinder head (4) from cylinder block (1) by lifting straight up.
3. Remove cylinder head gasket (5) from cylinder block (1). Discard cylinder head gasket (5) and clean
gasket remains from mating surfaces.
4-120