Hitachi SB 75 - Page 3

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(5) Removing the gear
24
, pinion
27
, and drive pulley
assembly
22
z#
After removing the belt cover and the V-belt, loosen the
gear cover clamping screws (M4
+
Hd. FT-screws (3pcs.))
30
; then, remove the gear cover
29
together with the
pinion
27
and pulley (B)
33
.
z#
Remove the D10 C-Type retaining ring
26
and then remove
the gear
24
.
z#
Remove the 3 x 3 x 8 key
25
and the washer (B)
23
; then,
remove the drive pulley assembly
22
.
z#
To remove the pinion
27
, first remove the pulley (B)
33
;
then remove the gear cover
29
.
(6) Removing the housing
1
z#
Remove the sanding belt, belt tightener assembly
44
, belt
cover
35
, and V-belt
34
z#
Loosen the M4
+
Hd. FT-screws
43
(2pcs.); then remove the
plate
67
and shoe cushion
66
.
z#
Loosen the M4
+
tapping screw
36
(4pcs.) by inserting a
long plus (+) driver through the hole on the bottom of the body
20
; then remove the housing
1
.
2-2. Reassembling
Perform reassembling by following disassembling procedures in re-
verse order. The gear cover should be filled with Hitachi Motor
Grease No. 29 and the felt on the body and the idle pulley should be
impregnated with Turbine Oil No. 90 as lubricant. Exercise utmost
care in keeping the housing and the handle cover free from Turbine
Oil No. 90 while reassembling.
2-3. After disassembly and repair, measure the, insulation resistance
and conduct a dielectric strength test.