TM-9-2320-280-20-1

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 1 OF 3

JANUARY 1996

TM-9-2320-280-20-1 - Page 272 of 888

TM 9-2320-280-20-1

REFERENCE INFORMATION

ENGINE LUBRICATION

1. Start Test 10, Engine RPM.

2. Crank or start the engine. Displayed

reading is RPM. Cranking RPM

should be approximately 200. Idle

RPM should be 625-675.

Incorrect oil level and type can cause pres-

sure problems, leaks, excessive blowby, and

other problems.

Change 2

2-189

Remove sending unit, refer to (para. 4-25).

ENGINE RPM

STE/ICE-R TEST 10

1. Connect BLUE Transducer in place

of oil pressure sending unit. Dial test

50 (0-1000 psi). Perform offset test.

2. Dial test 01, interleave with RPM.

Dial test 50.

3. Start engine and observe display.

VTM will display RPM’s, then PSI.

ENGINE RPM

INTERLEAVE WITH 0-1000 PSI PRESSURE

Inspect the oil cooler, oil cooler supply

return lines, CDR valve hoses, oil pan, and

oil filter. Test CDR valve, (para. 3-9). See

the location on parts page to find these

parts.

ENGINE RPM

APPROXIMATE OIL PRESSURE

STOP

0 PSI

6.2L IDLE (650 ± 25)

10-15 PSI

6.5L IDLE (700 ± 25)

10-15 PSI

6.5L DETUNED

IDLE (700 ± 25)

10-15 PSI

2000

40-50 PSI

OIL PRESSURE CHART