Yale HOISTS SHAW-BOX YKA Operation & Service Manual page 102

7 Inspection and maintenance
102
Slide a new brake rotor (11), identical to the previous rotor, onto the hub (12) and
check the clearance.
NOTICE Danger of damage
– If increased clearance is present in the gearing between the brake rotor (11) and
hub (12), remove the hub (12) from the motor shaft and replace it. Be sure to
consult the production factory before removing the hub (12).
Replace the brake pressure springs (see section Replacing the pressure springs).
Check the O-ring of the coil carrier for damage and replace if necessary.
Clean coil carrier.
Assemble in reverse order.
– Steps 14 to 19 are omitted.
– Make sure that the inspection bore for the air gap measurement matches with the
opening in the fan cover. Secure the stud bolts (6) with thread locker.
– After tightening the fastening screws (8) (for tightening torque see Tab. 29), mark
the fastening screws (8).
Hoist motor type
4H33-MF10MB-200
4H42-MF10MC-200
4H62-MF11MA-200
4H71-MF11MB-200
4H72-MF13Z-200
4H73-MF13ZB-200
4H81-MF13ZC-200
4H82-MF13X-200
Tab. 29
Check the brake data against the rating plate on the hoist motor!
Hoist brake S max.
[in]
NM38720 0.024
NM38730 0.024
NM38740 0.031
NM38740 0.031
NM38741 0.031
NM38753 0.035
NM38753 0.035
NM38781 0.035
a Tightening torque (8)
[in] [lb ft]
f
1 7
1 7
1 16
1 16
1.2 16
1.2 16
1.2 16
1.2 16
07.2020