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BLOWER HUB LOCKING MECHANISM - TM-5-3895-374-24-1_573
IMPORTANT - TM-5-3895-374-24-1_575

TM-5-3895-374-24-1 Paving Machine Bituminous Material: Crawler Mounted Diesel Engine Driven Manual
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TM 5-3895-374-24-1 GP255FH There are three setscrews, positioned 120apart, that are used to secure the impeller to the shaft by means of the blower hub locking mechanism. One of the three setscrews is located over the key. The procedure below should be followed closely to properly secure the impeller: 1. Remove the three hex socket head setscrews and liberally apply Locktite 271. 2. Replace the setscrews loosely and slide the impeller back and forth on the shaft until the impeller is positioned at the midpoint of its travel range. 3. Snug either setscrew that is not over the key. Then snug the second setscrew that is not over the key. 4. Snug the setscrew that is over the key. 5. Torque the two setscrews not over the key to 516 inch pounds. 6. Torque the setscrew over the key to 400 inch pounds. IMPORTANT BEFORE STARTING THE BLOWER FOR THE FIRST TIME, the impeller should be rotated to  be  sure  there  are  no  restrictions  to  its  free  turning.    OPERATE  THE  BLOWER  FOR    15 MINUTES,  then recheck the setscrews. AFTER ONE WEEK OF OPERATION, recheck the setscrews and retorque if necessary. Thereafter, periodically check the setscrews. 3. Motor Removal/Replacement If it should become necessary to remove and replace the motor on a Hauck Turbo Blower, follow the appropriate procedures given below. FOR DIRECT DRIVE MODELS ONLY: CAUTION Ensure that electrical power cannot be accidentally applied to the motor during disassembly. A. Loosen the three setscrews at the rear of the Impeller hub. B. Remove the four nuts and bolts which fasten the motor to the blower base. (page 3-546)







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