Hitachi WR 25SE Service Manual page 7

Hide thumbs Also See for WR 25SE:

Perform reassembly by reversing the disassembly procedure. However, special attention should be given

to the following items.

1. Reassembly of the power supply unit and its vicinity

(1) Perform wiring according to the connecting diagram on page 9 when replacing the Switch [38] or Stator

Controller (C) Set [33] with new one.

(2) Connect the internal wires of Stator Controller (C) Set [33] to the Switch [38] paying attention to the

colors of the internal wires. Then secure them with the four Screws M3.5 x 5 [39].

(3) Be careful not to get the internal wires caught in the power supply unit.

Fig. 7 • Reassembly of the power supply unit and its vicinity

Internal wire (black)

Internal wire (yellow)

2. Reassembly of the impact mechanism

(1) Mount Hammer Washer (C) [16], Hammer Spring (C) [17], Spring Sheet (C) [18], and Spindle (C) [20]

in this order into Hammer (C) [14], which contains the thirty-five Steel Balls D4.76 [15].

(2) Match the peak of the cam groove of Spindle (C) [20] with the steel ball insertion groove of Hammer

compress Hammer Spring (C) [17] until it contacts Spindle (C) [20], and then hold it there.

(3) Put the two Steel Balls D10.3 [13] in the steel ball insertion groove. Check that the Steel Balls D10.3

[13] are in the cam groove, and then release the hand press.

(4) Mount the Idle Gear Set (2 pcs.) [21] and the two Needle Rollers [19] on Spindle (C) [20].

3. Reassembly of the main body

(1) Secure the stator to Housing (C) [34] with the two Screws D5 x 70 [32] and insert controller ass'y (A)

into the lower portion of the stator.

(2) Mount Rotor Ass'y (C) [30], Fan Guide (C) [28], and Inner Cover (C) [27] to Housing (C) [34].

NOTE: Be careful of the direction of Fan Guide (C) [28].

(3) Mount Metal (A) [25] and Packing (C) [26] to Inner Cover (C) [27].

NOTE: Be careful of the direction of Packing (C) [26].

(4) Mount Washer (A) [24] and Ring Gear (C) [23] to the impact mechanism assembled in the above step

2 and mount it to Inner Cover (C) [27].

NOTE: Mount Ring Gear (C) [23] with its protrusion toward the hammer case.

Reassembly

View from B

Internal wire (green)

Internal wire (blue)

[39]

-6-

[38]