TM 55-1930-209-14&P-213-12. Drum clutch adjustmenta.General. As clutch friction blocks wear, adjust five clutch adjusting screws (Fig. 3-8) so that just enoughclearance is maintained to clear blocks from drum.b.AdjustmentCAUTIONIf proper clearance is not maintained, heat and scoring of clutch drum may occur.(1)Apply air pressure of at least 90 psi to air chamber.(2)Rotate clutch drum so that adjusting screw #1 in Fig. 3-8 is at position "x" and adjust to .020 in.Figure 3-8. Drum Clutch Adjustments.3-17
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