TM 5-3825-270-23&P
FIELD MAINTENANCE
ENGINE KNOCK
INITIAL SETUP:
References (cont.)
Tools and Special Tools
Fuel/Water Separator And Filter Head
Tool Kit, General Mechanic's: Automotive
Replacement (WP 0176)
(WP 0225, Table 1, Item 12)
Field Level Preventive Maintenance Checks And
Services (PMCS) (WP 0069)
References
Water Distributor Operator Manual (TM
Engine Oil Pressure Testing (WP 0122)
5-3825-270-10)
Engine Module Replacement (WP 0128)
Engine Oil Service (WP 0124)
Engine Valve Cover And Gasket Replacement
Equipment Condition
Engine OFF. (TM 5-3825-270-10)
Fuel Tank Drain/Fill (WP 0174)
TROUBLESHOOTING PROCEDURE
ENGINE KNOCK
STEP 1
Does engine have appropriate level of engine oil?
Check engine oil level. (WP 0069)
CONDITION/INDICATION
Does engine have appropriate level of engine oil?
DECISION
No - Fill or drain engine to appropriate level with engine oil. (WP 0069) Verify problem is solved. (Step 5 - Does
engine knock?)
Yes - Go to step 2. (Step 2 - Does fuel exhibit excessive amount of water?)
STEP 2
Does fuel exhibit excessive amount of water?
1.
Drain fuel/water separator and retain for inspection. (WP 0069)
2.
Inspect fuel sample for excessive water.
CONDITION/INDICATION
Does fuel exhibit excessive amount of water?
DECISION
No - Go to step 3. (Step 3 - Does engine pass engine oil pressure test?)
Yes - Drain, purge, and refill fuel system with good fuel. (WP 0174) Verify problem is solved. (Step 5 - Does
engine knock?)
STEP 3
Does engine pass engine oil pressure test?
Perform engine oil pressure test. (WP 0122)
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