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 TM 55-1905-223-24-5
SECTION V. INTERMEDIATE GENERAL SUPPORT MAINTENANCE PROCEDURES
4-11. General. This section covers the general support maintenance procedures for the NT-855M bowthruster
diesel engine. Step-by-step procedures are provided, supported by illustration, as required.
MAINTENANCE OF BOWTHRUSTER ENGINE
4-12. Repair Cylinder Head Group.
This task covers:
a.
Disassembly
b.
Repair
c.
Assembly
INITIAL SETUP:
Tools
Equipment Condition
Tool kit, general mechanic's
Cylinder head removed
rail and marine diesel engines,
Adapter plate P/N 3376686
Drive Unit, counterbore P/N 3376855
Cutter plate P/N 3377235
Gauge block P/N 3376220
Torque wrench kit P/N 3377216
Combination wrench set 5120-01-046-4979
Valve spring compressor stand and plate,
P/N ST-1022, ST-1026
Valve seat insert tool kit P/N ST-257
Valve seat insert cutter P/N ST-662
Valve guide arbor P/N ST-663
Valve facing machine P/N 3376256
Valve guide reamer P/N ST-646
Valve head checking tool P/N 3375933
Valve seat grinder P/N ST-685
Valve guide mandrel P/N 3375282
Drill press 5130-00-293-1949
Dial bore gauge P/N 3376619
Head holding fixture P/N ST-583
Engine lifting fixture P/N 3822512
Injector sleeve holding tool P/N ST-1179
Hydrostatic tester P/N ST-1012
Tester adapter plate P/N ST-1013
Staking tool driver P/N ST-1122
Staking tool P/N ST-1124
1/2" Electric drill 4130-889-9002
Valve guide reamer P/N ST-1188
Machinists measuring tool kit
Change 1
4-5
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