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Table 8-2 Motor Brush Dimensions
"B" Dimension (inch)
Capacity (KG)
Discard
500 to 1000
0,24
Table 8-3 Top hook & bottom hook dimensions
Nominal "D" Dimension (inch)
Capacity
Hook
(KG)
Standard
Discard
Bottom
1,54
1,70
500 to
1000
Top
1,54
1,70
*These values are nominal since the dimension is not controlled to a tolerance. The "D" dimension
should be measured when the hook is new, this becomes a reference measurement. Subsequent
measurements are compared to this reference to make determinations about hook deformation/
stretch.
Table 8-4 Chain Wear Dimensions
"G" Dimension (inch)
Capacity (KG)
Standard
500 tot
3,78
1000
*Chain wear will occur in the section of chain that passes thru the sheave..
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B
D
F
C
"F" Dimension (inch)
"C" Dimension (inch)
Standard
Discard
Standard
Discard
0,94
0,85
0,75
0,68
0,94
0,85
0,75
0,68
E
"E" Dimension Wear Limit (inch)
Discard
Standard
Discard
3,96
0,25
0,22
Inspection Classification:
The inspection procedure for hoist in regular service is divided into two general classifications based
upon the intervals at which inspection should be performed. The intervals in turn are dependant upon
the nature of the critical components of the hoist and the degree of their exposure to wear, deterioration
or malfunction. The two general classifications are designated as Frequent and Periodic, with respective
intervals between inspections as defined below.
Initial Inspection: Prior to initial use, all new, altered or modified hoist shall be inspected
by a designated person to ensure compliance with the applicable provisions of this
manual.
Frequent inspections
1.
Normal Service – Monthly
2.
Heavy Service – Weekly to Monthly
3.
Severe Service – Daily to Weekly
4.
Special or Infrequent Service – As recommended by a qualified person before and after each
occurrence.
Periodic inpsections
1.
Normal Service – Yearly
2.
Heavy Service – Semi-Annually
3.
Severe Service – Quarterly
4.
Special or Infrequent Service – As recommended by a qualified person before the first occurrence
Frequent inspection
Inspections should be made on a Frequent basis in accordance with Table 8-5, "Frequent Inspection."
Included in these Frequent Inspections are observations made during operation for any defects or
damage that might appear between Periodic Inspections. Frequent Inspections shall be made by a
designated person to ensure that the hoist is maintained in safe working condition.
Table 8-5 Frequent inspection
1. Check all functional operating mechanisms for maladjustment and unusual sounds.
2. Check the operation of the limit switch and associated components.
3. Check the hoist braking system for proper operation.
4. Check the hooks in accordance with ANSI/ASME B30.10.
5. Check the hook latch operation.
6. Check the Load Chain in accordance with Section 8B
7. Check the Load Chain reeving.
Occasionally used hoist
Hoists that are infrequently used shall be inspected as follows before placing the hoist in service:
1.
Hoist idle more than one month, less than one year: Inspect per Frequent Inspection.
2.
Hoist idle more than one year: Inspect per Periodic Inspection.
Inspection reports
1.
A long-range chain inspection program should be established and should include records of an
examination of the chains that are removed from service. To create a relationship between visual
observation and actual condition of the chain.
2.
Dated inspection reports and records should be maintained for the hoist Periodic Inspection
intervals. These records should be stored where they are available to personnel involved with the
inspection, maintenance or operation of the hoist.
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