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8. Daily Inspection and Maintenance
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FB-1HE, FB-2E (Outdoor 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
Waterproof seal
23
V-ring
24
Waterproof cover attachment bolts
25
Waterproof cover
26
Shock absorber
X
Details for X
26
-
Gap Inspection
(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) Remove the brake release [2] (2 locations) and remove the waterproof seal [22].
(5) 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.
(6) 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) Pull off the V-ring [23].
(5) Remove the brake release [2] (2 locations) and remove the waterproof seal [22].
(6) Remove the waterproof cover attachment bolts [24], and remove the waterproof cover [25].
(7) 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 [26].
(8) 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.
(9) Check the gap G, and readjust the shims if there is a large difference between it and the required value.
(10) Attach the waterproof cover [25] using the waterproof cover attachment bolts [24]. At this time align the cutout
area on the side of the waterproof cover [25] with the brake release bolt [5]. Attach the waterproof cover [25] so
that the gap (A) between its hole and the motor shaft [21] is nearly uniform.
(11) Clean the surface of the waterproof seal [22] to remove impurities.
(12) As shown in the construction diagram, install the waterproof seal [22] between the stationary core [1] and the
waterproof cover [25]. Then attach the brake release [2]. Insert the waterproof seal [22] with its arrow mark pointing toward the
load side. Align the hole in the waterproof seal [22] for the brake release bolt with the position of the release bolt [5]. Attach the
waterproof seal [22] so that its protrusion fits snuggly around the entire circumference of the groove for the stationary core [1]. (Be
careful that the waterproof seal [22] does not meander. Otherwise water could leak in.)
(13) Turn the power on and off to check brake action.
(14) Attach the V-ring [23]. Wipe off the lip and surface near the lip of the V-ring [23], lightly coat the the lip contact surface with
grease, and attach. Observe the attaching dimension (B
=
6mm).
(15) Attach the fan [15], shaft-retaining C-ring [14] and cover [13].
(16) 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
Ｂ
Ａ
Figure 8-25
