MOS-94P Multiple Launch Rocket System (MLRS) Repairer M142 HIMARS Download
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4. Remove the azimuth drive unit (M270A1). a. Remove brake from ADU and position out of the way for ADU removal. b. Remove pinion cover to base remove two draw bolts securing ADU to standoff adjuster. c. Loosen each jack bolt, using a crisscross pattern. d. Remove super bolts by hand and retain for installation. e. Ensure all cables and hydraulic lines are out of the way before removing the ADU. f. Remove the ADU. 5. Install replacement ADU. a. Remove the two adjusting nuts on the standoff adjuster of the ADU support bracket. b. Position the pinion gear high point to the rear of the ADU. c. Rotate the pinion gear to obtain alignment with azimuth gear bearing. d. Install jack bolts into super bolt body, and then install super bolts. e. Install washers on draw down bolts. f. Verify that the super bolts are free in the support bracket. g. Install draw down bolts by alternately torque the two draw down bolts in 1/4 increments. h. Tighten jack bolts on each of the four super bolts to finger tight. i. Re-torque each of the six jack bolts for each of the four super bolts to a final torque of 25.8 to 28.5 Nm (227 to 251 in lbs). j. Measure the distance between the adjusting nuts and the support bracket. (1) The measurement must be 10mm or less. (2) Tighten the adjusting nut against washer 1/6 turn (approximately 1 flat of the nut) past hand tight. 3-88 1 October 2014