TM-9-2815-225-34-P

ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2005
TM-9-2815-225-34-P

  TM-9-2815-225-34-P - Page 40 of 736

TM 9-2815-225-34&P
0004 00
0004 00-4
ENGINE TROUBLESHOOTING (Contd)
Table 1. Engine Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. ENGINE KNOCKS
a. Check for broken piston.
b. Check for broken injector cup.
c. Check for incorrect valve
adjustment.
d. Check for incorrect injector
adjustment.
e. Check for loose connecting rod
capscrews.
f. Check for worn connecting rod
bearings.
g. Check for loose main bearing
capscrews.
h. Check for worn main bearings.
i. Check for excessive crankshaft
end clearance.
j. Check for worn crankshaft.
k. Check for worn piston pins.
l. Check for broken piston.
m.Check for incorrect injection
timing.
a. Replace piston (WP 0018 00).
b. Repair injector (WP 0032 00).
c. Adjust valves (WP 0043 00).
d. Adjust injectors (WP 0043 00).
e. Tighten connecting rod capscrews
to proper torque and check
bearings (WP 0042 00).
f. Replace connecting rod bearings
(WP 0012 00 and WP 0042 00).
g. Torque main bearing capscrews
(WP 0042 00).
h. Replace main bearings
(WP 0042 00).
i. Check crankshaft end clearance
(WP 0042 00).
j. Replace crankshaft and install
new bearings (WP 0042 00).
k. Replace worn piston pins and
bushings or replace rods
(WP 0018 00).
l. Replace piston (WP 0018 00).
m.Adjust injector system timing
(WP 0041 00).
10. EXCESSIVE
FUEL CONSUMPTION
a. Check for incorrect valve and
injector adjustment.
b. Check for excessive fuel pressure.
c. Check for restricted fuel drain.
d. Check for defective injector(s).
e. Check for leaking cylinder head
gasket(s).
f. Check for incorrect injection
timing.
a. Adjust valves and injectors
(WP 0043 00).
b. Test and calibrate fuel pump
(WP 0044 00).
c. Repair fuel crossover tubes
(WP 0010 00).
d. Replace defective injector(s)
(WP 0011 00).
e. Replace cylinder head gasket(s)
(WP 0011 00).
f. Adjust injector system timing
(WP 0043 00).


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