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8. Daily Inspection and Maintenance
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FB-5E, FB-8E (Indoor Type)
Code Part Name
1 Stationary core
2 Brake release
3 Seal washer
4
Manual release prevention
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 o 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
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Figure 8-13
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