5554
8. Daily Inspection and Maintenance
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FB-30 (Indoor Type)
Code Part Name
1 Roller
2 Brake release bolt
3 Rubber packing
4
Manual release prevention
spacer
5 Seal washer
6 Stationary core
7 Electromagnetic coil
8 Stud bolt
9 Brake lining
10 Adjusting washer
11 Spring washer
12 Gap adjusting nut
13 Boss
14 Shaft-retaining C-ring
15 Fan
16 Cover
17 Fan set screw
18 Leaf spring
19 Fixed plate
20 Armature plate
21 Spring
22 Nut
23 Tap-end stud
24 Ball bearings
25 Release lever
26 Bearing cover
27 Motor shaft
28 Grommet
- Gap Inspection
(1) Remove the grommet [28] and cover [16].
(2) Insert a gap gauge between the stationary core [6] and the armature plate [12],
and measure the gap. Measure in 3 locations around the circumference.
(3) Adjustment is required if the gap value is near the limit.
- Gap Adjustment
(1) Remove the grommet [28] and cover [16].
(2) Insert a gap gauge between the stationary core [6] and the armature plate [20] and rotate to the right the gap adjusting nuts [12]
that are attached to ends of the stud bolts [8]. If large adjustments to the gap are not possible, decrease the number of adjust-
ing washers [10]. There are 3 gap adjusting nuts [12]. Adjust these in turn so that 3 positions on the circumference are uniformly
at the required gap.
(3) Turn the power on and o to check brake action.
(4) Attach the cover [16] and grommet [28].
Gap value G (mm)
Required value
(original value)
Limit value
0.6 – 0.7 1.5
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15 18 19 20 21 22 2316 17 25 27 24 26
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Figure 8-16
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