Section XXXIII. REPAIR AND REBUILD STANDARDS

C2, TM 9-2815-213-34

Thereafter, check oil level of the engine, with the

culating tank from the fuel supply tank.

dipstick every two (2) hours during run-in test. Maintain

This make-up fuel passes through the

oil level at "H" mark on the dipstick.

flowmeter and is the fuel rate of the

(5) Check engine coolant as follows:

engine registered in pounds per hour.

(a) After engine is started, add coolant as

Fuel rate is 120 pounds per hour.

required to completely fill cooling system and replace

entrapped air.

(b) The ideal water temperature is 175

throttle and check manifold pressure with Pressure

degrees Fahrenheit for best engine performance. It

Gage. It should be 202 to 218 pounds.

(d) Refer to Section XIX Fuel Pump for fuel

should ] exceed 190 degrees Fahrenheit during

operation.

pump governor adjustments.

(e) Inspect all fuel lines and connections for

load operation. Heat stored in the iron masses will boil

leaks and security of mounting.

cooling water in the jackets if air and water circulation

(f) Inspect lubricating oil connections for

cease while engine is still hot. Allow engine to idle for a

leaks. Check oil cooler for security of mounting and in-

few minutes before shutting down.

let/outlet connections for leaks.

(6) Check fuel pressures as follows.

(g) After run-in has been completed, load

(a) Check fuel manifold pressure with f

applications should be minimal for the first 50 hours of

system pressure gage (4, fig. B-29) as shown figure 3-

operation. This gives new parts a chance to "wear- in"

99.

Accelerate from idle to full throttle a record

without undue stress and strain.

maximum pressure recorded on gage; it should be 202

to 218 pounds.

3-173. Performance Curve

(b) Check fuel rate with fuel flow rate check

gage (2, fig. B-24) as shown in figure 3-100.1 gage's

Figure 3-101 is an engine performance curve. Solid

flow tank is placed between the engine and t fuel supply

lines represent maximum ratings at 500 feet altitude

tank. Fuel return line(s) and the f pump suction line are

29.38 inches mercury and 85 degrees Fahrenheit

then attached to the circulating tank.

ambient air temperature. The dotted lines indicate

standard sea level conditions. These curves indicate

NOTE

engine performance with fuel system, water pump,

As the engine burns fuel, the float valve

lubricating oil pump and air cleaner. It does not include

allows make-up fuel to flow into the cir-

battery charging generator,

compressor,

fan and

optional equipment.

Section XXXIII. REPAIR AND REBUILD STANDARDS

proved for further service. An asterisk in the "Wear

3-174. General

Limits" column indicates that the part or parts should be

The repair and rebuild standards give maximum

replaced when worn beyond the limits given in the "New

minimum, and key clearances of new or rebuilt pa Wear

Dimensions" column. All dimensions are given in inches.

limits are given, which indicate the point which a part or

parts may be worn, in order to receive maximum service

before replacement. Normally, parts which have not

3-175. Cylinder Block

been worn beyond the dimensions shown in "Wear

(para 3-4)

Limits" column will be

3-62