8. Daily Inspection and Maintenance
66
67
4
16
1
2
14
Gap adjusting bar
2
1
14
Gap Adjusting Bar Dimension
14.7±0.1mm
150m
m
3.5m
m
- Gap Inspection
(1) Remove the outdoor cover [25] and the cover [8].
(2) Loosen the fan set screw [10] and remove the fan [7].
(3) Pull off the V-ring [23] and remove the brake cover [22].
(4) Insert a gap gauge between the field [4] and the armature [12] and measure the gap. Measure in 4 locations around the circumfer-
ence.
(5) Adjustment is required if the gap value is near the limit.
- Gap Adjustment
(1) Manually release the brake with following the procedure on P70.
(2) Loosen the stopper [16] on the periphery of the center ring [1], and remove. This will free the gap adjusting screws [2].
(See Figure 8-29)
(3) Insert a gap adjustment bar (An angle plate should be prepared by customer. See Figure 8-31) into the groove of adjustment screw
(2) between the outer disk (14) and the center ring (1)
Rotating the gap adjusting bar to the left as seen from the field [4] side, will narrow the gap. (See Figure 8-30)
(4) Six attachment bolts [3] and lock bolts [11] alternately pass through the space between the outer disc [14] and the center ring [1].
Rotating the gap adjustment bar will make the bar touch these bolts. There are 8 equally distributed holes for gap adjusting screws
[2]. Adjust the gap G to the required value by repeating (3) each time the gap adjusting bar contacts a bolt.
(5) Select the point where hole and screw hole are closest to the required gap and attach the stopper [16] there.
(6) After returning the manual brake release to its original state, turn power on and off to check brake action.
(7) Attach the brake cover [22], V-ring [23], fan [7], fan set screw [10], cover [8] and outdoor cover [25]. At this time coat the fan set screw
[10] with Three Bond TB2365.
Figure 8-29
Figure 8-30
Figure 8-31
Gap Value G (mm)
Required value
(original value)
Limit value
0.7
2.0
