56
8. Daily Inspection and Maintenance
57
■
FB-1D (Outdoor Type)
Part Number
Part Name
1
Armature plate
2
Brake lining
3
Spacer
4
Gap adjusting shims
5
Attachment bolt
6
Fixed plate
7
Fan
8
V-ring
9
Fan set screw
10
Shaft-retaining C-ring
11
Boss
12
Leaf spring
13
Cover
14
Waterproof cover
15
Waterproof cover attachment bolts
16
Waterproof seal
17
Brake release bolt
18
Manual release protection spacer
19
Brake release
20
Spring
21
Electromagnetic coil
22
Stationary core
23
Bearing
24
Motor shaft
1
2
3
4
5
6
7
8
9
10
11
12 13 14 15 16 17 18 19 20
21 22
23
24
Ｇ
- Gap Inspection
(1) Remove the brake release bolt [17] and the manual release prevention spacer [18].
(2) Remove the cover [13].
(3) Loosen the fan set screw [9] and remove the fan [7].
(4) Remove the brake release [19]. (2 Places)
(5) Remove the waterproof seal [16].
(6) Insert a gap gauge between the stationary core [22] and the armature plate [1]
and measure the gap. Measure in 3 locations around the circumference.
(7) 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 [17] and the manual release prevention spacer [18].
(2) Remove the cover [13].
(3) Loosen the fan set screw [9] and remove the fan [7].
(4) Pull off the V-ring [8].
(5) Remove the brake release [19]. (2 Places)
(6) Remove the waterproof seal [16].
(7) Remove the waterproof cover attachment bolts [15], and remove the waterproof cover [14].
(8) Loosen the attachment bolts [5] and remove the spacers [3], gap adjustment shims [4], attachment bolts [5] and
fixed plate [6] as a set. When removing the attachment bolts only, make sure not to fall the gap adjustment shims [4].
(9) The gap adjustment shims [4] have a thickness of 0.2 – 0.25 mm. Reduce the number of shims according to the wear
conditions, then reassemble the spacers [3], gap adjustment shims [4], attachment bolts [5] and the fixed plate [6] as a set.
(10) Check the gap G, and readjust the shims if there is a large difference between the gap and the required value.
(11) Attach the waterproof cover [14] by using the attachment bolts [15]. Attach the waterproof cover [14] so that the gap (A) between
its hole and the motor shaft [24] is nearly the same.
(12) Clean the surface of the waterproof seal [16] to remove impurities.
(13) As shown in the construction diagram, install the waterproof seal [16] between the stationary core [22] and the waterproof cover
[14]. Then attach the brake release [19]. Insert the waterproof seal [16] with its arrow mark pointing toward the load side. Align the
hole in the waterproof seal [16] for the release bolt with the position of release bolt [17]. Attach the waterproof seal [16] so that its
protrusion fits snugly around the entire circumference of the stationary core’s groove [22]. Otherwise water could leak in.
(14) Turn the power on and off to check brake action.
(15) Attach the V-ring [8]. Wipe off the lip and surface near the lip of V-ring [8], lightly coat the lip surface with grease, and attach. Ob-
serve the attaching dimension (B=4.5mm).
(16) Attach the fan [7] and cover [13]. Use a fan set screw [9] coated with Three Bond TB2365 (Sumitomo part number EW445WW-01),
and tighten with a torque of 0.85 – 1.05N•m. Finally, attach the brake release bolt [17] and the manual release prevention spacer
[18].
Gap Value G (mm)
Required value
(original value)
Limit value
0.3 - 0.4
0.6
Ｂ
Ａ
Figure 8-19
