R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist TMU Motorized Trolley - Manual (Page 19)

LM TMU I&M MANUAL/EN/06.15.2009
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Copyright © (2009) R&M Materials Handling, Inc. All rights reserved.
3.8 Adjustment of Compact Brake Air Gap
y Disconnect power and lockout disconnecting means on the crane/hoist.
y Disconnect the power cable plug from the hoist.
y Remove brake and motor leads from enclosure.
y Remove the brake cover.
y Push the brake disk and measure the air gap between the adjustment nut and aluminum ring. The air
gap must be 0.008 – 0.012 inches [0.2 - 0.3 mm]. Turn the adjustment nut, to adjust the air gap.
y Add the brake cover, install brake and motor leads, and connect the power supply plug to motor.
3.9 Removal and Inspection of the Brake
3.9.1 Compact Brake
y Disconnect power and lockout disconnecting means on the crane/hoist.
y Disconnect the power cable plug from the hoist.
y Remove the brake cover.
y Unscrew and remove the adjustment nut.
y Remove the brake parts. If the thickness of the friction disc is less than 0.197” [5 mm], replace brake
discs and friction disc.
y Re-assemble in the reverse order.
y Adjust the brake air gap.
3.9.2 D.C. Disc Brake
Figure 8. D.C. Disc Brake and Parts List
y Disconnect power and lockout disconnecting means on the crane/hoist.
y Disconnect the power cable plug from the hoist.
y Remove the brake cover.
y Unscrew the mounting screws.
y Remove the brake. If the thickness of the friction disc is less than 0.23” [5.8 mm], replace brake discs
and friction disc.
y Re-assemble in the reverse order.
y Recommended tightening torque for mounting screws is 1.8 lb-ft [2.5 Nm]
)
Note: The air gap on the D.C. Brake is not adjustable.
2. Brake cover
3. Mounting screws
4. Friction disc
S. Thickness of friction disc
Data below is for NM38710NR#, 2
Nm brake type and torque size