UPPERSTRUCTURE / Control Valve Assemble Housing 1. Install O-rings (4) (16 used), (5) (12 used) and (6) (3 used) to the mounting surface for housing (2). CAUTION: Housings (1, 2) weight: 150 kg (330 lb) 2. Install housing (1) to housing (2) with socket bolts (3) (9 used). : 206 to 216 N m (21 to 22 kgf m, 152 to159 lbf ft) : 14 mm W2-5-61