UPPERSTRUCTURE / Control Valve Disassemble Housing CAUTION: Housings (1, 2) weight: 150 kg (330 lb) 1. Remove socket bolts (3) (9 used). Remove O-rings (4) (16 used), (5) (12 used) and (6) (3 used) from housing (1 or 2). : 14 mm 2. Separate housing (1) and housing (2). W2-5-59