8. Daily Inspection and Maintenance
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51
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FB-5E, FB-8E (Indoor Type)
Part Number
Part Name
1
Stationary core
2
Brake release
3
Seal washer
4
Manual release protection spacer
5
Brake release bolt
6
Stud bolt
7
Adjusting washer
8
Spring washer
9
Gap adjusting nut
10
Brake lining
11
Leaf spring
12
Boss
13
Shaft-retaining C-ring
14
Cover
15
Shaft-retaining C-ring
16
Fan
17
Fixed plate
18
Armature plate
19
Spring
20
Electromagnetic coil
21
Ball bearings
22
Motor shaft
- Gap Inspection
(1) Remove the brake release bolt [5] and the manual release prevention spacer [4].
(2) Remove the cover [14].
(3) Insert a gap gauge between the stationary core [1] and the armature plate [18]
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
(1) Remove the brake release bolt [5] and the manual release prevention spacer [4].
(2) Remove the cover [14].
(3) Insert a gap gauge between the stationary core [1] and the armature plate [18] and rotate to the right the gap adjusting nuts [9] that
are attached to ends of the stud bolts [6]. If large adjustments to the gap are not possible, decrease the number of adjusting washers
[7]. There are 3 gap adjusting nuts [9]. Adjust these in turn so that 3 positions on the circumference are uniformly at the required gap.
(4) Turn the power on and off to check brake action.
(5) Attach the cover [14].
(6) Finally, attach the brake release bolt [5] and the manual release prevention spacer [4].
Gap Value G (mm)
Required value
(original value)
Limit value
0.35 - 0.45
1.0
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15 16 17 18 19 20 21
Ｇ
22
Figure 8-9
