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9-2. Reassembly
Reassembly can be accomplished by following the disassembly procedure in reverse. However, special attention
should be given to the following items.
(1) Application of lubricant
Apply special grease (for hammer and hammer drill) to the O-ring (1AP-20)
[28]
and O-ring (B)
[30]
for the
Hammer Holder
[29]
, Damper (A)
[31]
, O-ring (C)
[32]
, O-ring (I.D. 16)
[36]
for the Striker
[35]
, outer
circumference of the Striker
[35]
, inner and outer circumference of the Piston Pin
[40]
, outer circumference of
the Piston
[37]
, Reciprocating Bearing
[51]
, Reciprocating Bearing
[51]
rotary shaft of the Second Shaft
[47]
,
clutch claw of the Cylinder
[22]
, inner circumference of the metal of the Inner Cover Ass'y
[39]
, Second
Hammer
[27]
, and the lip portion of the Oil Seal
[12]
. Fill 45 g of the special grease in the gear cover and 5 g
in the inner cover groove. Apply Molub Alloy No. 777-1 grease to the outer circumference of the Clutch
[50]
groove and the pin portion of the Change Lever
[20]
. Apply Hitachi Motor Grease No. 29 to the O-ring (S-18)
[19]
for the Steel Ball D7.0
[21]
and the Change Lever
[20]
.
* Application of Hitachi Motor Grease No. 29 makes it easy to mount the Spacer
[45]
.
(2) Mounting the Cylinder
[22]
Mount the Second Hammer
[27]
, O-ring (1AP-20)
[28]
, Hammer Holder
[29]
, O-ring (B)
[30]
, Damper (A)
[31]
,
new O-ring (C)
[32]
and Damper Holder
[33]
in the Cylinder
[22]
. Push the new Stopper Ring
[34]
into the
Cylinder
[22]
then push in the hole side of stopper ring jig (A) (J-341) on it as shown in Fig. 13. Push the
upper end surface of stopper ring jig (A) (J-341) with a hand press to fit the Stopper Ring
[34]
in the groove of
the inside diameter portion of the Cylinder
[22]
. Check that the Stopper Ring
[34]
is securely fitted in the
groove of the inside diameter portion of the Cylinder
[22]
viewing from the 5-mm diameter hole (2 pcs.) on the
Cylinder
[22]
.
(3) Mounting the Change Lever
[20]
Push the Pushing Button
[17]
deeply in the hole of the Change Lever
[20]
. Position the Change Lever
[20]
on
the Gear Cover
[10]
as shown in Fig. 14 and push it in firmly. Adjust the Change Lever
[20]
to the position
"Ro Hammering" ( mark) or "Rotation Only" ( mark).
Damper (A)
[31]
Stopper Ring
[34]
Damper Holder
[33]
5-mm diameter hole (2 pcs.)
O-ring (C)
[32]
O-ring (B)
[30]
O-ring (1AP-20)
[28]
Second Hammer
[27]
Hammer Holder
[29]
Fig. 13
Stopper ring jig (A) (J-341)
Hand press
