TM 5-3805-248-23-1
ENGINE, EXHAUST AND COOLING SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0009 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
Engine Misfires or Runs
6.
Check valve clearance.
1. Adjust valve clearance (WP 0265 00).
Rough - Continued.
2. Go to Test 7.
7.
Check for worn, bent or broken push
1. Replace push rod(s) (WP 0265 00).
rod (WP 0265 00).
2. If push rods are OK, go to Test 8.
8.
Check fuel injection timing (WP 0274
1. Adjust timing (WP 0274 00).
00).
2. Go to Test 9.
9.
Check fuel pressure at fuel injector
1. If fuel pressure is below 30 psi (207
housing inlet. Pressure must be at least
kPa), replace primary fuel filter (WP
30 psi (207 kPa).
2. If fuel pressure is STILL below 30 psi
(207 kPa), replace fuel transfer pump
(WP 0275 00).
3. If pressure is OK, go to Test 10.
10. Perform cylinder balance test (WP
1. If fuel pressure at suspect cylinder fuel
injection nozzle appears to be equal to
pressure at all other fuel injection
nozzles, replace fuel injection pump as
necessary (WP 0273 00).
2. If pressures are not equal, remove
blockage from nozzle-to-pump fuel line
or replace nozzle for suspect cylinder
(WP 0272 00).
3. Go to Test 11.
11. Remove cylinder head and inspect
Replace damaged components as
cylinder walls, pistons, valves and
necessary. Refer to appropriate work
valve lifters (WP 0259 00).
package.
6.
Engine Starts but Fails to
Keep Running.
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.
1.
Check air cleaner for air restriction.
1. Clean air inlet and service air cleaner
filter elements (WP 0031 00).
2. If no restriction is found, go to Test 2.
