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 TM 55-1905-223-24-5
Table 1-1. Equipment Data - CONT
Characteristics
Reference Data
EXHAUST SYSTEM
Maximum allowable back pressure imposed
by piping and silencer
3 in Hg (75 mm Hg)
Exhaust pipe size (normally acceptable
inside diameter)
5 in (127 mm)
FUEL SYSTEM
Engine idle speed
650 to 750 rpm
Maximum allowable restriction to pump:
With clean filter
4 in Hg (100 mm Hg)
With dirty filter
8 in Hg (200 mm Hg)
Maximum allowable fuel return line
restriction:
2.5 in Hg (63 mm Hg)
With check valves and/or overhead tanks
6.5 in Hg (165 mm Hg)
Fuel Check Valve between Fuel Filter and Fuel Pump
Minimum Opening Pressure
0.3 psi (2.1 kPa)
Fuel Check Valve between Fuel Pump and Cylinder Head
Opening Pressure
3 to- 8 psi (21 to 55 kPa)
Fuel Check Valve in Fuel Drain Line
Opening Pressure
1/4 to 1/2 psi (13 to 25 mm Hg)
Derate Engine Fuel Rate for
Hot Weather
1% per 10above 100 (2% per 11 above 380C)
F
C
Shutoff Valve Solenoid Coil Resistance
24 Volts (DC)
28-32 ohms
NOTE
The number of plates within a given battery size determines reserve capacity.
Reserve capacity determines the length of time sustained cranking can occur.
ELECTRICAL SYSTEM
Maximum allowable resistance of starting circuit
With 24-volt starter
0.002 ohms
Minimum cranking speed without starting aid
150 rpm
1-7
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