TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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(39) TM 9-2815 -202-34 NOTE When measuring clearances between rotor lobes, 1/2-inch wide feeler gages are recommended. When measuring clearances of more than 0.005 inch, laminated feeler gages made up of 0.002, 0.003 or 0.005-inch feeler stock are recommended. Rotor to rotor measurement should be taken one inch from each end and at center of blower. Measure clearance between trailing edge of right hand helix rotor and left hand helix rotor, (CC) clearance, from both inlet and outlet sides. Clearance must be 0.004 to 0.008 inch. (40) Measure clearance between leading edge of right hand helix rotor and trailing edge of left hand helix rotor, (C) clearance. Minimum clearance is 0.010 inch. 4-245