ENGINE TESTING -714670553

TM 5-2420-224-34

OVERVIEW

This section illustrates and describes procedures for testing the engine assembly.

ENGINE TESTING

This task covers:

a. Testing

INITIAL SETUP

Tools and Special Equipment:

General Safety Instructions (Cont):

Shop Equipment, SC 4910-95-CL-A31

WARNING

Tool Kit, SC 5180-90-CL-N26

Dynamometer

Fuel vapors are toxic. Avoid

prolonged

exposure

References:

breathing of fumes. Work in

AR 750-22

well-ventilated area. Failure

LO 5-2420-224-12

to do so could result in injury

TM 5-2420-224-10

to personnel.

TM 5-2420-224-20

Fuel and oil are slippery and

General Safety Instructions:

can cause falls. To avoid

injury, wipe up spilled fuel or

WARNING

oil with rags.

Diesel fuel is flammable. Do

not perform this procedure

near fire, flame, or sparks.

Injury or death to personnel

could result.

TESTING

Install engine on dynamometer and check engine oil level on dipstick. Add oil as required per LO 5-

2420-224-12.

Prior to starting engine, adjust valve clearance per TM 5-2420-224-20 and adjust fuel injection pump

timing (page 3-50). Refer to TM 5-2420-224-10 for engine specifications.

Prime fuel system per TM 5-224-2420-10, Chapter 3, para 3-5, steps b thru h.

Start engine and check for ease of starting.

Run engine at low idle (700-750 rpm) for 5 minutes. Adjust idle speed as required by turning adjusting

screw on end of governor. Accelerate engine and check governed speed (2800 rpm). Check all gages

for proper operation; inspect for leaks. Reduce engine speed to idle.

Increase engine speed to 1700 rpm and run for 5 minutes. Output torque should indicate 232 lb-ft

(314 N.m).

Increase engine speed to 2800 rpm and run for 5 minutes. Output horsepower should indicate 110 hp

(81 kW).

13-78 Change 1