Hitachi NEXT Series Service Manual page 49

4.19.2 Main motor removal for the Vtype.
① With hanging the motor by using a two motor eyebolts, remove the 8×M16-45 bolt for the gear casing and shaft seal
cover, and remove the 2×M16-60 for the motor and base plate
② Screw the 2×M16 stud bolt into the removal holes, and remove the shaft seal cover from the gear casing by using the
2×M16-80 bolt. 2×M16-80 bolt shall be tightened alternately.
③ When the shaft seal cover is removed from the gear casing, change the 2×M16-80 bolt to 2×M16 eyebolts. Hang the
motor by four motor eyebolts so that motor can keep the horizontal situation.
④ Move the motor for ODE side until bull gear can be seen.
⑤ Remove the motor. If you want to remove the motor for horizontal direction, lift the motor by crane so that shaft seal
cover does not hit the motor base.
Eyebolts
①
2×M16-60
2×M16-80 bolt
③
(Hang the motor by four motor eyebolts)
2×M16 eyebolts
⑤
8×M16-45 bolt
Gear Casing
Shaft Seal Cover
Gear casing
Shaft seal cover
Motor base
Confidential to Customer
55kW Motor Waight 441lbs (200 kg),
75kW Motor Waight 507 lbs (230 kg)
②
④
Bull gear
47
Gear Casing
2×M16 stud bolt
2×M16-80 bolt
Gear casing