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AUXILIARY EQUIPMENT
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TM-5-4210-229-14P Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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RESCUE SAW ENGINE FAILS TO START OR STARTS WITH DIFFICULTY
TM5-4210-229-14&P Table 5-1.  Direct Support Troubleshooting Chart (Continued). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. HYDRAULIC RESCUE TOOL POWER UNIT LACKS POWER (Continued) Step 4. Fouled air cleaner. Clean air cleaner (paragraph 5-6). Step 5. Check if air power unit is primed. Tip power unit at a 45°  angle and pull the recoil starter several times without starting it. Step 6. Check if sequence valve is out of adjustment. Adjust sequencing valve( paragraph 5-6). 4. HYDRAULIC RESCUE POWER TOOL UNIT SURGES OR RUNS UNEVENLY Step 1. Check for clogged fuel tank cap vent hole. Open vent hole. Step 2. Check for sticking or binding governor parts. Clean and deburr governor parts. Step 3. Check for binding or sticking of carburetor throttle linkage, throttle shaft, or butterfly. Clean, lubricate, or adjust linkage and deburr throttle shaft or butterfly. Step 4. Check for intermittent spark at spark plug. Disconnect ignition cut-off wire at the engine.  If no spark, check wires for poor connections, cuts, or breaks. Step 5. Check for improper carburetor adjustment. Adjust carburetor (paragraph 5-6). Step 6. Check for dirty carburetor. Clean carburetor (paragraph 5-6). 5. HYDRAULIC RESCUE TOOL POWER UNIT OVERHEATS Step 1. Check for improper carburetor adjustment. Adjust carburetor (paragraph 5-6). Step 2. Check for obstructed air flow. Remove any obstructions from air passages in shrouds. Step 3. Check for clogged cooling fins. Clean cooling fins. Step 4. Check for excessive load on engine. Check operation of associated equipment. Step 5. Check for lack of lubrication. Fill crankcase to proper level. 6. HYDRAULIC RESCUE TOOL POWER UNIT USES EXCESSIVE AMOUNT OF OIL Step 1. Check if oil level is too high. To check level, turn dipstick cap tightly into receptacle for accurate level reading. Step 2. Check if oil filler cap is loose, or if gasket is damaged. Replace ring gasket under cap and tighten cap securely. 7. HYDRAULIC RESCUE TOOL POWER UNIT FAILS TO OPERATE THE TOOL AT ALL Step 1. Check if dump valve is in dump position. Switch dump valve to PRESSURE position. (The valve handle will point toward the hose.) Step 2. Check for lack of hydraulic fluid in the unit. Fill the unit with 1-1/2 gallons (5.7 liter) of hydraulic fluid (Appendix D, item 19) and then prime with the unit by tipping the power unit at a 45° angle and pull the recoil starter several times without starting it. 5-4

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