Hitachi DH 40MEY Service Manual page 15

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Lubrication points and types of lubricant

Specified grease (for rotary hammer drill)

• Fill 60 g of specified grease in the Crank Case [89] on the Connecting Rod Ass'y [39] side as shown in

Fig. 20.

• Fill 0.5 to 1.0 g of specified grease to the space between the metals on both sides of the Crank Case

[89] as shown in Fig. 21.

• Apply specified grease to the inner and outer diameter portions of the Cylinder [25], sliding portion of the

Striker [26], and O-ring [27] of the Striker [26] as shown in Fig. 22.

• Apply specified grease to the inner diameter portion of the Connecting Rod Ass'y [39], outer diameter

portion of the Piston [38], and O-ring [36] of the Piston [38] as shown in Fig. 23.

• Apply specified grease to the sliding portion of the Second Hammer [21] and O-ring (C) [20] of the

Second Hammer [21] as shown in Fig. 24.

• Apply specified grease to the Weight Shaft [93] and the inner periphery of the metal in the Crank Case

[89] before inserting the Weight Shaft [93] as shown in Fig. 25.

• Apply specified grease to the inner lips of Oil Seal (A) [117] and Oil Seal (B) [88], inner and outer

diameter portions of the Bevel Gear [34], Thrust Washer [35], inner periphery of the Clutch [32], inner

diameter portion of the metal in the Cylinder Case [13], inner lip of oil seal in the Cylinder Case [13],

Damper [23], Retainer Damper (B) [16], and inner and outer peripheral polished surfaces of the

Retainer Sleeve [19].

Hitachi Motor Grease No. 29

• Fill a total of 20 g of Hitachi Motor Grease No. 29 in the Crank Case [89] on the First Gear [128] side

and the Gear Cover [130] side.

• Apply Hitachi Motor Grease No. 29 to the Needle Bearing (M661) [129], pinion portion of the Rotor [134],

and the Bit Lock [18].

Fig. 19

• Specified grease (for rotary hammer drill)

CAUTION: Both the viscosity and consistency of this specified grease are optimized for the

Model DH 40MEY rotary hammer, in order to prolong its service life. Therefore,

applying ordinary grease used for conventional models (e.g. DH 40MRY) to the

Model DH 40MEY may dramatically shorten its service life.

500 g

Net weight

500 g

60 g

Code No.

335781

335782

-14-

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