TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 577 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-473 STEERING SYSTEM Do not loosen slotted nut to install cotter pin. Loosening the nut may result in damage to the equipment. To check for proper operation of ball joints: (i) Chock rear wheels front and back. (ii) Raise front wheels about two inches off the ground and support on a jack stand. (a)Lower ball joints. (iii) Mark a line across the head of the top bolt holding the steering arm cover. Make sure the mark is parallel to the lower control arm. (iv) Put a prybar between the cover control arm and geared hub. (v) Set a 6-inch ruler upright between the lower control arm and the marked screw. (vi) Push down the prybar to try to move the hub. (vii) Measure movement in the hub assembly. If movement is more than 1/8 inch (3 mm), replace lower ball joint (refer to para. 6-27). (b) Upper ball joints. (viii) Grasp top of tire and attempt to move it in and out. (ix) Measure any movement at top outer edge of tire. Replace upper ball joints if tire movement is 3/8 inch (10 mm) or more (refer to para. 6-26). Check for looseness in idler arm and pitman arm, refer to (para. 8-18 and 8-14). For replacing center link refer to (para. 8-15). For replacing tie rods refer to (para. 8-17). For adjusting the drivebelt tension, refer to (para. 3-82, all except M1123 and "A2" vehicles), and replacing the pulley, refer to (para 8-24). CAUTION M1123 and "A2" CONFIGURATION