TM 5-3825-225-14&P
1-18. RATING DETAILS.
a.
Maximum Gross Rated Output .............................................................................55 bhp at 4000 rpm
b.
Maximum Gross Torque Output ................................................... 83 lb.-ft. (112.5 Nm) at 2200 rpm
1-19. ENGINE WEIGHTS (DRY).
NOTE
Approximate dry weight of a bare engine Includes fuel injection equipment, pressed steel oil
sump, alternator, and water pump; it does not Include starter motor, air cleaner, fan, flywheel or
flywheel housing.
a.
Bare Engine ................................................................................................................330 lb (150 kg)
b.
Engine (with All Accessories) ...................................................................................... 450 lb (204 kg)
1-20. DE-RATING FOR ALTITUDE.
a.
Engines operating in rarefied atmospheres, due to altitude, should be de-rated.
b.
Table 1-2 is a general guide, which may be applied on a percentage basis, where specific figures for a
particular engine rating are not available.
Table 1-2. Engine De-rating Specifications.
Altitude
Maximum Fuel Delivery De-rating*
0-2000 ft. (0-610 m)
no change
2000-4000 ft. (610-1220 m)
6%
4000-6000 ft. (1220-1830 m)
12%
6000-8000 ft. (1830-2440 m)
18%
8000-10000 ft. (2440-3050 m)
24%
10000-12000 ft. (3050-3660 m)
30%
* Measured at setting speed given in pump setting code.
1-21. RECOMMENDED TORQUE TENSIONS.
The following torque values apply with the components lightly oiled before assembly.
a.
Cylinder Head Nuts** ............................................................................................ 60 lb.-ft. (81 Nm)
b.
Connecting Rod Setscrews ................................................................................... 42 lb.-ft. (57 Nm)
c.
Main Bearing Setscrews*** ..................................................................................85 lb.-ft. (115 Nm)
d.
Flywheel Setscrews . ..............................................................................................60 lb.-ft. (81 Nm)
e.
Idler Gear Hub Setscrews...................................................................................... 32 lb.-ft. (43 Nm)
f:
Crankshaft Pulley Setscrews ............................................................................. 150 lb.-ft. (203 Nm)
1-4
