Hitachi CM 4ST, Technical Data And Service Manual

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Ball Bearing
629VVC2PS2L [43]
Washer (A) [45]
Dust Seal [8]
Ball Bearing
608VVC2PS2L [9]
Fig. 5
4. Disassembly of the armature
(Fig. 4)
(1) Use a wooden or plastic hammer to gently
tap on the end surface of the Housing
Ass’y
[16] , in order to loosen and remove
the Armature [47] .
(2) Use a bearing puller to extract the Pinion
[42] and Ball Bearing 629VVC2PS2L [43] ,
and then remove Washer (A) [45] and the
Woodruff Key 2.5 x 8 [46] .
(3) Finally, use the bearing puller to extract
the Ball Bearing 608VVC2PS2L [9] , and
then remove the Dust Seal [8] .
Reassembly can be conducted by reversing the disassembly procedures. However, special attention
should be given to the following items.
(1) Ensure that the Rubber Ring [44] is properly inserted into the bearing chamber of the Gear Cover [41] .
During reassembly, be very careful not to damage the Rubber Ring [44] .
(2) When only replacing the Ball Bearing 629VVC2PS2L [43] and Ball Bearing 608VVC2PS2L [9] , be very
careful to ensure that Washer (A) [45] and the Dust Seal [8] are reassembled in the proper direction, as
shown in Fig. 5.
• Insert 5 g of grease (Nippeco SEP-3A, Code No.930035 recommended) into the gear chamber of the
Gear Cover [41] .
• Grease the teeth of the Pinion [42] and the gear of the Spindle And Gear Set [39] (by using a brush).
• Liberally apply grease (Nippeco SEP-3A, Code No.930035 recommended) to the inner and outer
surfaces of the Rubber Ring [44] and O-Ring [34] .
• Tapping Screw (W/Flange) D4 x 20 (Black) [18] ----------------------2.0 ± 0.5 N•m (20 ± 5 kgf•cm)
• Hex. Hd. Tapping Screw D5 x 65 [3] -------------------------------------3.4 ± 0.5 N•m (35 ± 5 kgf•cm)
• Machine Screw (W/Washers) M5 x 25 [20]----------------------------- 3.4 ± 0.7 N•m (35 ± 7 kgf•cm)
• Seal Lock Screw (W/Sp. Washer) M5 x 25 [48] -----------------------3.9 ± 1.0 N•m (40 ± 10 kgf•cm)
• Machine Screw M3.5 (Switch [14] ) --------------------------------------0.6 ± 0.2 N•m (6 ± 1.5 kgf•cm)
Reassembly
Application of lubricant
Screw Tightening Torques
Ball Bearing 608VVC2PS2L [9]
Dust Seal [8]
Armature [47]
Woodruff Key 2.5 x 8 [46]
Washer (A) [45]
Rubber Ring [44]
Ball Bearing 629VVC2PS2L [43]
Pinion [42]
Fig. 4