8. Daily Inspection and Maintenance
46
47
- Gap Inspection
(1) Remove the brake release bolt [4] and the manual release prevention spacer [3].
(2) Remove the cover [13].
(3) Insert a gap gauge between the stationary core [1] and the armature plate [16]
and measure the gap. Measure in 3 locations around the circumference.
(4) Adjustment is required if the gap value is near the limit.
(You cannot adjust the thickness of the gap adjustment shims to about 0.2 to 0.25 or less.)
- Gap Adjustment
(1) Remove the brake release bolt [4] and the manual release prevention spacer [3].
(2) Remove the cover [13].
(3) Remove the fan set screw [12] and remove the fan [14].
(4) Loosen the attachment bolts [7] and remove the spacers [5], gap adjustment shims [6], attachment bolts [7] and fixed plate [15] as a
set. When removing the attachment bolts [7] make certain not to omit the gap adjustment shims [6].
(5) The gap adjustment shims [6] have a thickness of 0.2 - 0.25 mm. Reduce the number of shims according to the wear conditions, then
reassemble the spacers [5], gap adjustment shims [6], attachment bolts [7] and the fixed plate [15] as a set.
(6) Check the gap G, and readjust the shims if there is a large difference between the gap and the required value.
(7) Turn the power on and off to check brake action.
(8) Attach the fan [14], fan set screw [12] and cover [13]. Use a fan set screw [12] coated with Three Bond TB2365 (Sumitomo part num-
ber EW445WW-01), and tighten with a torque of 0.85 - 1.05 N·m. Finally, attach the brake release bolt [4] and the manual release
prevention spacer [3].
Gap Value G (mm)
Required value
(original value)
Limit value
0.3 - 0.4
0.6
■
FB-1D (Indoor Type)
Part Number
Part Name
1
Stationary core
2
Brake release
3
Manual release protection spacer
4
Brake release bolt
5
Spacer
6
Gap adjusting shims
7
Attachment bolt
8
Brake lining
9
Leaf spring
10
Boss
11
Shaft-retaining C-ring
12
Fan set screw
13
Cover
14
Fan
15
Fixed plate
16
Armature plate
17
Spring
18
Electromagnetic coil
19
Bearing
20
Motor shaft
3
11
4
10 9
7
8
13
14 15 16 17 18 19 20
12
5
6
1
2
Ｇ
Figure 8-5
