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8. Daily Inspection and Maintenance
8-9 Changing the Brake Lining and Inner Disc
If the following conditions occur ask the nearest authorized service station to exchange the brake linings and inner discs with new
ones.
(1) FB Brakes (excluding FB-01A1, FB-02A1, FB-05A1), ESB-250, ESB-250-2
When the thickness of brake lining (FB brake) or inner disc (ESB-250) reaches the use limit thickness in Table 8-18
(2) FB-01A1, FB-02A1, FB-05A1
When after gap adjustment the brake gap still reaches the limit (see P47, P58)
Table 8-18 Brake Lining, Inner Disc Dimensions
Brake type
Brake lining
Inner disc
Dimension drawing
Original thickness Usable thickness limit
t
0
(mm) t
1
(mm) t
0
(mm) t
1
(mm)
FB-01A1, FB-02A1,
FB-05A1
7.0
−
−
−
FB-1D 6.0
FB-1E 8.8 7.8
FB-1HE, FB-2E 9.0 8.0
FB-3E, FB-4E 10.4 8.4
FB-5E, FB-8E 10 6.0
FB-10E, FB-15E 11 7.0
FB-20, FB-30 16 12
ESB-250
ESB-250-2
6.0 1.5 3.6 0.3
- Brake torque may not be at the prescribed level during initial operation. In such case, turn motor and brake power on and o under
the lightest possible load, to rub the brake lining and the inner disc friction surfaces.
- When changing the brake lining and the inner disc, change the boss and leaf springs (for FB-5E – FB-15E, FB-20, FB-30, include the
gap adjusting nuts) as a set.
- After 2 million or more cycles of operation, (for FB-30, ESB-250 1 million cycles or more), or after 10 years or more have passed since
shipment from the factory, inspect to check whether continued operation is possible, even if the lining or the inner disc is not at the
usable thickness limit.
- Check the following items concerning the condition of each mechanical part.
Are the material of linings split or chipped?
Is there any peeling or gap between the material of lining and the disc?
Does the spline unit of the brake lining and the inner disc exhibit any cracking, chipping, or stepped wear?
Is there any stepped wear on the surfaces around the stud bolts or armature plate?
- Change the brake lining and the inner disc, even if it has not reached the usable thickness limit, if 10 or more years have elapsed since
the manufacturing date and the brake is used outdoors or in a high-humidity environment, or if it is stored or rested for a long
period of time.
8-10 Changing the V-Ring and Waterproof Seal (Outdoor Type)
V-rings and waterproof seals degrade over the years, losing their waterproong abilities. As a guideline contact the nearest authorized
service station every 3 years. If the sliding surfaces of oil seals or V-rings show signs of wear or corrosion, replace them with new ones.
Sliding surfaces are made of carbon steel, so rain water, condensation and other factors could cause rust to form and spread. Because
this could lead to oil seal damage, take on-going rust prevention measures.
t0
1 t
t0
0
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