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8. Daily Inspection and Maintenance
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FB-1HE, FB-2E (Indoor Type)
Code
Part Name
1
Stationary core
2
Brake release
3
Seal washer
4
Manual release prevention
spacer
5
Brake release bolt
6
Spacer
7
Gap adjusting shims
8
Attachment bolt
9
Brake lining
10
Leaf spring
11
Boss
12
Shaft-retaining C-ring
13
Cover
14
Shaft-retaining C-ring
15
Fan
16
Fixed plate
17
Armature plate
18
Spring
19
Electromagnetic coil
20
Ball bearings
21
Motor shaft
22
Shock absorber
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Gap Inspection
(1)
Remove the brake release bolt [5] and the manual release prevention spacer [4].
(2)
Remove the cover [13].
(3)
Insert a gap gauge between the stationary core [1] and the armature plate [17]
and measure the gap. Measure in 3 locations around the circumference.
(4)
Adjustment is required if the gap value is near the limit.
(Gap adjustment shim thickness is approximately 0.35 – 0.45 mm. Adjustment cannot be made at a lower value.)
-
Gap Adjustment
(1)
Remove the brake release bolt [5] and the manual release prevention spacer [4].
(2)
Remove the cover [13].
(3)
Remove the shaft-retaining C-ring [14], and remove the fan [15].
(4)
Loosen the attachment bolts [8] and remove the spacers [6], gap adjustment shims [7], attachment bolts [8] and fixed plate [16]
as a set. When removing the attachment bolts [8] make certain not to omit the gap adjustment shims [7] or the shock absorber
[22].
(5)
The gap adjustment shims [7] have a thickness of 0.35 – 0.45 mm. Reduce the number of shims according to the wear conditions,
then reassemble the spacers [6], gap adjustment shims [7], attachment bolts [8] and the fixed plate [16] 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 [15], shaft-retaining C-ring [14] and cover [13].
(9)
Finally, attach the brake release bolt [5] and the manual release prevention spacer [4].
Gap value G (mm)
Required value
(original value)
Limit value
0.25 – 0.35
0.75
1
2
3
4
5
6
7
8
9
10
11
12
Ｇ
13
14
15
16
17
18
19
20
21
X
Details for X
22
Figure 8-11
