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TM5-4210-229-14&P
Table 5-1. Direct Support Troubleshooting Chart.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AUXILIARY EQUIPMENT
1.
HYDRAULIC RESCUE TOOL POWER UNIT FAILS TO START OR STARTS WITH DIFFICULTY
Step 1.
Check for closed fuel shutoff valve
Open valve by turning 1/4 turn counterclockwise.
Step 2.
Check for fuel in tank.
Fill tank with clean, fresh fuel.
Step 3.
Check if throttle lever not in choke position.
Position throttle lever to the left, past the detent position.
Step 4.
Check for obstructed fuel line.
Clean fuel screen and line. If necessary, remove and clean carburetor (paragraph 5-6).
Step 5.
Check for obstructed tank cap vent.
Open vent in fuel tank cap.
Step 6.
Check for water in fuel.
Dry tank. Clean carburetor and fuel lines. Dry spark plug points. Fill tank with clean, fresh fuel.
Step 7.
Check if engine is overchoked.
Close fuel shut-off and pull starter until engine starts. Reopen fuel shut-off for normal fuel flow.
Step 8.
Check for improper carburetor adjustment.
Adjust carburetor (paragraph 5-6).
Step 9.
Check for loose or defective magneto wiring.
Check magneto wiring for shorts or grounds; repair if necessary (paragraph 5-6).
Step 10. Check if spark plug is fouled.
Clean and regap spark plug (paragraph 5-6).
Step 11. Check for cracked spark plug porcelain.
Replace spark plug (paragraph 5-6).
Step 12. Check for no spark at plug.
Disconnect ignition cut off wire at the engine. Crank engine. If spark at spark plug, ignition switch, safety
switch or interlock switch is inoperative. If no spark, check magneto. Check wires for poor connections, cuts
or breaks (paragraph 5-6).
2.
HYDRAULIC RESCUE TOOL POWER UNIT MISSES UNDER LOAD
Step 1.
Check for fouled spark plug.
Clean and regap spark plug.
Step 2.
Check for cracked spark plug porcelain.
Replace spark plug.
Step 3.
Check for improper spark plug gap.
Regap spark plug (paragraph 5-6)
Step 4.
Check for improper carburetor adjustment.
Adjust carburetor (paragraph 5-6).
3.
HYDRAULIC RESCUE TOOL POWER UNIT LACKS POWER
Step 1.
Partially closed choke.
Open choke.
Step 2.
Improper carburetor adjustment.
Adjust carburetor (paragraph 5-6).
Step 3.
Lack of lubrication.
Fill crankcase to the proper level.
5-3
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