Hitachi DH 24PD3 Technical Data And Service Manual page 31

(6) Press-fitting the first gear
Press-fit the First Gear [62] aligning with the shaft end surface of the Second Shaft [57]. After press-fitting the
First Gear [62], check that the inside ring of the Reciprocating Bearing [61] turns smoothly.
(7) Reassembly of the oil seal
Prior to reassembly, apply grease to the inner circumference of the Oil Seal [12]. However, do not apply
grease to its outer circumference. Also, when press-fitting the Oil Seal [12], ensure that it is straight and level.
(8) Reassembly of the internal pressure adjustment mechanism
Push Felt Packing (A) [51], Valve [52] and Felt Packing (B) [53] in the Inner Cover Ass'y [40] as far as they
will go in this order.
Felt Packing (A) [51]
Valve [52]
Felt Packing (B) [53]
Fig. 23
Inner Cover Ass'y [40]
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