Screw Locking Agent Tb1401 - Hitachi H 65SD2 Technical Data And Service Manual

(4) Mounting of Oil Seal (A) [25]
When mounting Oil Seal (A) [25] on the Piston [27], ensure
that the lip portion of the oil seal is directed toward the rear
surface of the piston, as illustrated in Fig. 18. Prior to
reassembly, thoroughly coat Oil Seal (A) [25] and O-Ring
(A) [22] with grease (Grease for Impact Drill, Part No.
980927 or 981840 or 308471 is recommended), and
carefully ensure they are not damaged.
(5) Reassembly of the Retainer [1] section
Before reassembly, apply grease (Doubrex #251 Part No. 980757) to the sliding portion between the Retainer
[1] and the Retainer Damper [3] of the Front Cover [5], and Lever Pin [2]. Mount the two Retainer Dampers
[3] to the Front Cover [5] and then mount the Retainer [1]. Insert the Lever Pin [2] into the 17.5 mm dia. hole
of the Retainer [1] facing the recessed portion of the Lever Pin [2] to the hexagonal hole of the Front Cover
[5]. At this time, align the 6.5 mm dia. hole of the Retainer [1] with the 7 mm dia. hole of the Lever Pin [2].
Drive the Roll Pin D6 x 55 [8] into the 6.5 mm dia. hole of the Retainer [1] approximately 5 mm under the end
surface of the Retainer [1] (Fig. 19).
Retainer Damper [3] (2 pcs.)
Recessed portion

9-3. Screw Locking Agent TB1401

(1) Prior to reassembly, all M5, M6 hexagon socket hd. bolts and machine screws must be coated with screw
locking agent TB1401.
(2) The following parts must be replaced with new Hitachi genuine parts if they are loosened once.
Front cover fixing bolts:
Cylinder case fixing bolts:
Fixing bolt on the Connecting Rod Ass'y [28]: M8 x 16 [31]
CAUTION: If fastening bolts come loose from vibration, it could cause serious damage to the machine.
Ensure without fail that TB1401 screw locking agent is applied as directed above prior to
reassembly. Before applying the TB1401, carefully clean any grease or other foreign matter
from the male and female threads with gasoline, thinner or similar cleaning solvents.
6.5 mm dia. hole
7 mm dia. hole
Retainer [1]
Lever Pin [2]
Roll Pin D6 x 55 [8]
(2 pcs.)
Fig. 19
M8 x 30 [4]
M8 x 35 [23]
--- 15 ---
Oil Seal (A) [25]
O-Ring(A) [22]
Fig. 18
Front Cover [5]
17.5 mm dia. hole
Lip
Piston [27]