TM10-3930-660-20 18-19. MLRS ATTACHMENT -  REPLACE  (Cont’d) 5. REMOVE MLRS ATTACHMENT (11) FROM BOOM. a. Remove locknut (25), capscrew (26), pivot pin (27), and two spacer rings (28) securing attachment (11) to boom. Discard locknut (25). Spacer rings (28) are used as required and may not be present on all vehicles. b. c. Start engine and carefully move vehicle rearward to separate attachment (11) from boom. Stop engine. Place attachment (11) on suitable supports and remove lifting device. INSTALLATION MLRS  attachment  weighs  approximately 2500 lbs. when all components, including forks, remain installed. 1. ATTACH MLRS ATTACHMENT (11) TO BOOM. a.   Attach lifting device to attachment (11) and raise attachment (11) to height required to align mounting holes of attachment (11) with holes in boom. CAUTION Be certain that metal caps are installed on fittings (15) at front of boom as instructed in step 3C of removal. Failure to do so could result in personal injury caused by pressurized hydraulic oil spraying out of open fittings  (15)  when  engine  is  started. 18-77