TM 5-3805-248-23-1
ENGINE, EXHAUST AND COOLING SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0009 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
15. Black or Gray Exhaust
Smoke During Normal
Operation.
WARNING
DO NOT perform fuel system checks, inspections or maintenance while smok-
ing or near fire, flames or sparks. Fuel may ignite, causing damage to machine
and injury or death to personnel.
Hot oil or metal parts can cause severe burns. Wear insulated gloves, long
sleeves and eye protection when working with heated parts. Failure to follow
this warning may cause injury.
1.
Check air cleaner for air restriction
1. Clean air inlet and service air cleaner
filter elements (WP 0031 00).
2. If no restriction found, go to Test 2.
2.
Check for fuel in engine lubricating
1. Replace defective fuel injection nozzles
oil. If fuel is present, perform cylinder
(WP 0272 00).
balance test (WP 0029 00).
2. Drain engine lubricating oil, install new
oil filter and refill crankcase (WP 0022
3. If fuel is not present, go to Test 3.
3.
Check turbocharger for proper
1. Replace turbocharger if damaged (WP
operation.
0276 00).
2. If turbocharger is OK, go to Test 4.
4.
Check fuel injection timing (WP 0274
Adjust timing (WP 0274 00).
00).
16. White or Blue Exhaust
Smoke.
WARNING
DO NOT perform fuel system checks, inspections or maintenance while smok-
ing or near fire, flames or sparks. Fuel may ignite, causing damage to machine
and injury or death to personnel.
Hot oil or metal parts can cause severe burns. Wear insulated gloves, long
sleeves and eye protection when working with heated parts. Failure to follow
this warning may cause injury.
1.
Check for coolant in engine oil.
1. If coolant is present, replace cylinder
head gasket (WP 0259 00).
2. If no coolant in engine oil, go to Test 2.
