TM 5-3895-346-14
ENGINE TUNEUP
ENGINE OVERHAUL
TABLE 3 (1977 Engines)
Engine
4-53N
(a) Injectors
C40
C45
C50
(a) Maximum Rated Speed
2800
(a) Minimum Rated Speed
2800 (C40)
2400 (C45)
2500 (C50)
Gear Train Timing
Adv.
Injector Timing
1.470 inches
Timing Gage
J 24236
Throttle
(e)
Yield Link
Yes
Setting
0.454 inch
Liner Port Height
0.840 inch
Compression Ratio
21:1
Blower Drive Ratio
2.487:1
Governor Type
Limiting Speed
Thermostat
170-180 (77-82 )
F
C
Nominal Opening Temperature
(a) Not to exceed injector size and maximum operating speed that has been established. No-load speed will
vary with injector size and governor type.
(e) Large fill hole (0.250 inch dia.) 0.016-inch discharge orifice. Use a minimum idle speed at 500 rpm on all
engines.
415
