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 TM 55-1905-217-12
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. EXCESSIVE VIBRATION IN PROPELLER SHAFT.
Step 1. Check for bent or broken propeller.
Replace propeller (para 3-20).
ALTERNATOR
1. ALTERNATOR FAILS TO CHARGE.
Step 1. Check alternator belt is loose.
Adjust alternator belt (para 3-11).
Step 2. Inspect charging circuits and battery connections.
Tighten connection to make good contact.
2. LOW UNSTEADY OR EXCESSIVE CHARGING RATE.
Step 1. Check alternator and regulator connections.
Tighten as required.
Step 2. Check if alternator belt is too loose.
Adjust belt to 1/2-inch slack (para 3-1l).
3. NOISY ALTERNATORl
Step 1. Check for defective or worn bet.
Replace belt.
Step 2. Check misaligned belt or pulley.
Correct alignment.
Step 3. Check for loose pulley.
Tighten pulley.
ELECTRIC STARTING SYSTEM
1. STARTER WILL NOT CRANK ENGINE.
Step 1. Test batteries.
Recharge batteries
HYDRAULIC STARTING SYSTEM
1. ENGINE DRIVEN PUMP FAILS TO RAISE PRESSURE.
Step 1. Check fluid level.
Add oil if necessary.
2. CRANKING SPEED TOO LOW.
Step ,1. Check system fluid too heavy.
Use fluid as specified.
Step 2. Check engine crankcase oil is too heavy.
Replace oil with proper viscosity grade. Refer to lubrication order.
3. HAND PUMP FAILS TO CHARGE SYSTEM.
Step ,1. Check manual relief valve if open.
Close relief valve
Step 2. Check fluid level.
Add oil if necessary.
STEERING SYSTEM
1. STEERING WHEEL DIFFICULT TO TURN.
Step '1. Check if both ball valves at pump discharge are open (Hulle 8500 thru 8519).
Close one ball valve.
2. STEERING IS SLOW.
Step ,1. Inspect ball valve (Hull No. 8500 thru 8519) at pump discharge.
One valve must be closed, the other open.
3. WHEEL WILL NOT TURN.
Step 1. Check rudders if Jammed or fouled.
Remove physical obstruction.
Step 2. Check one or more ball valves at cylinders are closed.
Open ball valves at cylinders (in Lazarette).
3-9
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