BODY (UPPERSTRUCTURE) / Pump Device Removal IMPORTANT: Pay attention to the removal and installation of O-ring between regulator (6) and main pump (8). 4. Remove regulator (6) from main pump (8). CAUTION: Pump device weight: ZW220: 83 kg (185 lb) ZW250: 107 kg (240 lb) 1. Remove the reducer (with the bleeder valve attached) at the regulator part of the pump device. Install the plug (with eyebolt attached). Attach a nylon sling onto eyebolt. Hoist the pump device. Place the pump device onto a wooden block of approximately 100 square mm (3.9 square in) with the regulator facing upward. NOTE: Pull the regulator obliquely upward when it floats up. Refer to W2-6-8. : 41 mm W4GB-02-04-001 2.
Remove socket bolts (2) (2 used), spring washers (3) (2 used) and washers (4) (2 used) from pilot pump (1). Remove pilot pump (1) and O-ring (5) from main pump (8). : 8 mm 3. Remove socket bolts (7) (4 used) from regulator (6). : 8 mm W2-6-9