TM-5-4310-389-14
Table 3-2. Unit Troubleshooting Procedures (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (Contd)
22.
Engine oil consumption excessive (Contd).
Step 4. Check to see if oil metering screw for rocker arm lubrication is incorrectly set. Adjust oil
metering screw. Notify Direct Support Maintenance.
Step 5. Check engine oil breather. Clean or replace.
23.
Engine smokes white.
Step 1. Check to see if engine is below start limit temperature or cold start procedure has been
unobserved. Observe ambient condition.
Step 2. Check to see if cold start aid is defective. Notify Direct Support Maintenance. Repair or
replace.
Step 3. Check stop lever position when starting. Possible defective run solenoid.
Step 4. Check air in fuel system. Bleed air from fuel system.
24.
Engine smokes blue.
Step 1. Check to see if the engine is excessively inclined. Ensure that engine is not inclined over 15
degrees.
Step 2. Check to see if oil level is too high. Drain to proper level.
Step 3. Check to see the engine is run mainly at low load. Operate engine at rated rpm.
Step 4. Check to see if oil metering screw for rocker arm lubrication is incorrectly set. Adjust oil
metering screw. Notify Direct Support Maintenance.
25.
Engine smokes black.
Step 1. Check to see if air cleaner is contaminated. Clean air cleaner.
Step 2. Check to see if exhaust back pressure is excessive. Clear cooling system of contamination.
Refer to Direct Support Maintenance.
Step 3. Check fuel return lines for clogging or crimping. Clean, replace as necessary.
Step 4. Check valve and decompressor clearance. Adjust if necessary.
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