UPPERSTRUCTURE / Pump Device Disassemble Pump Device CAUTION: The pump assembly weight: 290 kg (640 lb) 1. Remove plug (63). Drain oil from pump casing (55). 2. Remove the regulators (2 used) in pumps 1, 2 from pump casing (55). NOTE: As for removal and disassembly of the regulator, refer to the regulator section on W2-4-39. The structures of pumps 1, 2 are identical. Put the marks on the regulator in pumps 1,2 in order not to confuse. 3. Remove the gear pump (pilot pump) from booster cover (7). NOTE: As for removal and disassembly of the gear pump, refer to the gear pump section on W2-4-59. 4. Remove socket bolts (8) (5 used). Remove booster cover (7) from valve cover (1). : 6 mm 5.
Remove socket bolts (11) (2 used). Remove cover (10) from valve cover (1). : 8 mm CAUTION: Valve Cover (1) weight: 60 kg (130 lb) 6. Install eyebolt (M12, pitch 1.75 mm) to the bolt hole on valve cover (1). Hoist and hold the eyebolt. 7. Remove socket bolts (4) (1 used), (12) (2 used) and (13) (9 used) from valve cover (1). Tap and remove valve cover (1) from pump casing (55) by using a plastic hammer. : 17 mm W2-4-17