11
12
SINGLE & DOUBLE GIRDER TOP-RUNNING BRIDGES
WITH INDIVIDUAL MOTOR DRIVEN
END TRUCKS
P/N: 11532620 REV. AA
September 2018
MAINTENANCE CONTINUED
9. Put the rubber bearing holder in touch with the brake cover.
10. Put the ball bearing in touch with the rubber bearing holder and
lock with the retaining ring.
11. Put the fan and screw the (2) screws of the clamp.
12. Put the fan cover and tighten with (4) M4 screws.
Fir Gearmotor
Motor
horsepower
KW
Normal
Air Gap
Maximum
Air Gap
Brake Mounting
Bolt Torque
0.75
0.55
0.3
0.4
Not Defined
1.0
0.75
0.4
0.5
Not Defined
1.5
1.2
0.4
0.5
Not Defined
2.0
1.5
0.4
0.5
Not Defined
3.0
2.2
0.4
0.5
Not Defined
5.0
3.6
-
-
-
BRAKE RECTIFIER REMOVAL AND REPLACEMENT
Rectifier is located inside the motor conduit box cover. To replace
follow these steps:
1. Disconnect and lock out power supply.
2. Unplug motor leads and open conduit box.
3. Remove rectifier and unplug wires.
4. Plug wires into replacement rectifier.
a. Connect brake leads to DC side of rectifier, terminals
marked
“+” & “–”.
b. Connect leads from the plug to the AC side, two terminals
marked “~”.
5. Re-assemble in reverse order disassembly.
6. Turn power onto crane and test for proper operation.
BRAKE REMOVAL AND REPLACEMENT
If brake air gap exceeds the maximum allowed, or is not functioning
properly, the brake may need to be replaced. Follow these
instructions.
1. Turn power off to crane and lock out
2. Unplug motor leads, open motor conduit box and disconnect
brake leads from rectifier
3. Remove brake cover
4. Remove retaining ring and fan (if applicable).
5. Remove (3) mounting bolts holding brake magnet body in place.
Pull brake leads from motor, remove magnet, brake coil and rotor.
6. Re-assemble in reverse order, and tighten mounting bolts to
specified torque.
7. Turn power back on to crane and test brakes for proper operation.
ELECTRICAL
1. Gearmotors
a. The bridge gearmotors are inverter duty. If gearmotor requires
any service or repairs, other than what is described in this
manual, the complete gearmotor must be replaced.
b. For hoist and trolley motors, consult the hoist and trolley
literature.
2. Bridge Control Panel.
a. All connections should be checked frequently for tightness.
3. Hoist and Trolley. Panel, brakes, limit switches, etc. Consult hoist
and trolley literature for maintenance and spare parts information.
CMK_12322 Yale Rotating Axle End Truck Parts 11532619-REV AD_mec.indd 12
10/16/18 2:07 PM
