Hitachi DH 40MR, Техническое и сервисное руководство

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Fig. 23
(4) Reassembly of the slip clutch
Press-fit the Bevel Pinion [50] into the Collar [51] and the Ball Bearing 6002DDCMPS2L [53] then insert it into
the Washer [54] and Washer (A) [55]. Mount the Feather Key 3 x 3 x 8 [44] to the Bevel Pinion [50] then
press-fit into the Gear Holder [56]. Mount the Second Gear [59] around the outer circumference of the Gear
Holder [56]. Before mounting, apply Hitachi Motor Grease No. 29 to the inner circumference of the Second
Gear [59]. Insert the ten Needles [58] being careful not to incline them, then push in ten Springs (C) [57] as
shown in Fig. 23. Fill the slots and the through holes of the Gear Holder [56] with Hitachi Motor Grease No.
29. Press-fit the Bevel Pinion [50] into the Spacer [60] and the Ball Bearing 629VVC2PS2L [61].
Collar [51]
Needle [58]
Bevel Pinion [50]
Washer (A) [55]
Bevel Pinion
[50]
Spring (C) [57]
Slot of gear
holder
Ball Bearing
6002DDCMPS2L [53]
Gear Holder [56]
Washer [54]
Gear Holder [56]
Ball Bearing
629VVC2PS2L [61]
Spacer [60]
Second Gear [59]
Feather Key
3 x 3 x 8 [44]
Cross section A - A
(5) Carbon brush inspection
The motor employs Carbon Brushes [91] which are
consumable parts. When they become worn to or
near "wear limit" (7 mm), it could result in motor
trouble. Replace the Carbon Brushes [91] with new
ones which are numbered "73" as shown in Fig. 24.
In addition, always keep Carbon Brushes [91] clean
and ensure that they slide freely within the brush
holders.
Wear limit
No. of carbon brush
("73" means the last
two digits of the code
number.)
73
17 mm
7 mm
(6) Application of lubricant
Apply special grease (for hammer and rotary hammer) to the inner circumference of the Connecting Rod [34],
the O-rings [30] of the Striker [29] and the Piston [32], the sliding portion of the Second Hammer [19], the Oil
Seal [10], Oil Seal (A) [52], Oil Seal (B) [48], the Damper [21] and inner and outer circumferences of the
Bevel Gear [35]. Fill 50 g of the special grease in the Cylinder Crank Case [49] on the Connecting Rod [34]
side and 20 g in the Cylinder Crank Case [49] on the Clutch [31] side. Apply Hitachi Motor Grease No. 29 to
the Needle Bearing (M661) [65], the pinion portion of the Armature [82] and the Needle Roller D8 x 20 [16].
Fill 30 g of the Hitachi Motor Grease No. 29 in the Cylinder Crank Case [49] on the First Gear [64] side and
the Gear Cover [66] side.
Fig. 24