Inspection of the Pulleys

TASK 20-24-12-200-003-A
Inspection of the Pulleys

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
Pulley Wear Patterns
Run-out Measurement Method of the Pulley

3. Job Set-up
Subtask 20-24-12-869-052-A

A. Not Applicable

4. Procedure
Subtask 20-24-12-210-052-A

A. Inspection of the Pulleys

Pulley Wear Patterns

(1) Do a check of the pulley condition for:
(a) Cracked edges
(b) Signs of unusual wear at the bottom of the groove
(c) Cracked hub
(d) Blisters
(e) Too much play in the bearings or the loose bearings
(2) Do an inspection of the pulleys during the operation cycle.
(a) Make sure that there are no hard points when the pulleys turn.
(b) Make sure that the cable does not skid on the pulleys.
(c) Make sure that the eccentricity agrees with the values shown in this table:

PULLEY MINOR DIAMETER	MAX. ECCENTRICITY AT TOP OF GROOVE	MAX. ECCENTRICITY AT BOTTOM OF GROOVE
Less than or equal to 30 mm (1.181 in.)	0.30 mm (0.012 in.)	0.15 mm (0.006 in.)
From 30 mm (1.181 in.) to less than 80 mm (3.150 in.)	0.40 mm (0.016 in.)	0.20 mm (0.008 in.)
More than or equal to 80 mm (3.150 in.)	0.50 mm (0.020 in.)	0.20 mm (0.008 in.)

(3) Do an inspection of the pulleys after the run-out.

Run-out Measurement Method of the Pulley

(a) For each turn of the pulley, make sure that the sideways run-out is not more than:

0.25 mm (0.0098 in.) for pulleys with a diameter less than 80 mm (3.150 in.)
0.30 mm (0.012 in.) for pulleys with a diameter of 80 mm (3.150 in.) or more.

[Rev.10 from 2021] 2026.04.01 04:23:27 UTC