Yale HOISTS SHAW-BOX YKA Operation & Service Manual page 105

7 Inspection and maintenance
07.2020
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. 30), mark
the fastening screws (8).
Hoist motor type
4HS3
4HS5
4HS7
4HS8
4HSA
Tab. 30
Check the brake data against the rating plate on the hoist motor!
Hoist brake S max.
[in]
NM38730 0.024
NM40940 0.031
NM40951 0.031
NM40980 0.035
NM40980 0.035
a Tightening torque (8)
[in] [lb ft]
f
1 7
1 16
1.2 16
1.2 16
1.2 16
105