TM 5-4930-218-14
Section Ill. TROUBLESHOOTING
actions. If you experience a malfunction which is not
3-6. General
listed or is not corrected by listed corrective actions,
a. This section contains troubleshooting in-
notify your supervisor.
formation for locating and correcting most of the
operating troubles which may develop in the
lubricating and servicing unit. Each malfunction for
Troubleshooting
an individual component, unit, or system is followed
Refer to table 3-2 for troubleshooting which is
by a list of tests or inspections which will help you to
allocated to operator/crew maintenance levels.
determine probable causes and corrective actions to
take. Perform the tests/inspect ions and corrective ac-
tions in the order listed.
NOTE
b. This manual cannot list all malfunctions that
Before you use this table, be sure you have performed
may occur, nor all tests or inspections and corrective
all applicable operating checks.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. ENGINE FAILS TO TURN OVER WHEN STARTING BUTTON IS DEPRESSED.
Check to see if electrolyte level in battery cells is above the top of the plates TM 9-2610-200-20).
step 1.
WARNING
Do not smoke or use an open flame in the vicinity when servicing the bat-
tery.
Batteries
generate
gas,
which
is
highly
explosive.
If electrolyte level is below top of plates, add distilled water until electrolyte level is 1/2 inch above separators.
Step 2. Inspect for loose, corroded or broken battery cables.
Clean corroded cables. Tighten loose connections at battery, ground, and starter. If cables are broken, notify organizational
maintenance.
2. ENGINE TURNS OVER BUT FAILS TO START.
Step 1. Check to be sure oil pressure bypasa switch was firmly pressed.
Attempt to start engine, pressing switch firmly.
Check for insufficiently choked carburetor, especially when engine in cold.
Step 2.
Pull out choke.
Step 3.
Check for empty fuel tank.
WARNING
Do not fill fuel tank while engine is running.
Refill empty fuel tank.
Step 4. Check for water or dirt in fuel filter bowl.
Drain fuel tank and lines (para 3-3b). Refill with fresh fuel.
Check for flooded carburetor, especially if engine is hot.
Step 5.
Turn over engine with choke open (choke control handle pushed in) and throttle open (throttle control handle pulled out).
8. ENGINE STARTS BUT THEN STOPS.
Step 1. Check that oil pressure bypass switch is held long enough to insure starting.
Hold switch until oil pressure exceeds 20 psi.
Step 2. Check for insufficient fuel supply.
Refill empty fuel tank.
Step 3. Check fuel filter bowl for contaminated fuel.
Drain fuel tank and lines (para 3-9b). Refill with fresh fuel.
Step 4. Check for pulled out choke.
Push in choke control as engine warms.
Step 6. Check for tripped oil pressure safety switch.
If switch has been tripped, check oil level. If low, fill to proper level with recommended oil (TM 5-2805-203-14). If oil level is
not low, report trouble to organisational maintenance.
4. ENGINE RUNS BUT CONTINUALLY MISFIRES.
Step 1. Check for water in fuel.
Drain fuel tank and lines (para 3-9b). Refill with fresh fuel.
Step 2. Check for clogged fuel strainer.
Service fuel strainer (para 3-9a). Replace strainer element.
