46
During release
During operation
Brake release bolt
Brake release bolt
Spacer
Fig.43
Fig.44
Type of brake
FB–01A1
FB–02A1
FB–05A1
Gap G (mm)
Specification (lnitial value)
Limit
0.2–0.35
0.5
FB–1D
FB–2D
0.3–0.4
0.4–0.5
0.4–0.5
0.6
FB–3D
0.7
FB–5B
FB–8B
FB–10B1
FB–15B1
1.0
1.2
0.05–0.25
0.15–0.25
MB–003
MB–005
SB–004
0.35
0.4
9–2)
Manual Release Operation of Brake (FB-1D–15B1, FB-01A1–05A1 are
options.)
To manually release the brake without turning on the power, operate the brake release
device as follows:
(1) Remove the brake release bolts arranged diagonal to each other, and remove the
spacer. Then screw in the bolts with a hexagon wrench, and the brake will be
released. Be careful not to turn the brake release bolts excessively. (Check to see if
the brake is released, while turning the brake release bolts.) (See Fig.43.)
(2) To return to the original state after releasing the bolts, re-install the spacer, which was
removed in step (1), to the original position for safety. (See Fig.44.)
9–3) Gap Inspection
When the brake is used for a long time, the brake lining becomes abraded and the brake
cannot be released. Periodically check the gap G as follows :
(1) Remove the cover.
(2) Insert the feeler gauge between the stationary and armature cores to measure the
gap. When the gap is near the limit shown in Table 12, adjustment is necessary.
Measure three points along the circumference. (Gap of MB-003, 005 can not be
adjusted. The minimum thickness of the gap adjusting shim for FB-1D–3D is
0.2–0.25mm.)
Table 12 Brake Gap
9. Brake Maintenance
