OZ Lifting Products Premium Chain Hoist OM - Manual (Page 12)

Exception
Brakes require more than audible and visual inspection. Check daily by operating the product with and
without a load, stopping at various positions to ensure safe operation.
Dimensions of Brake Disc for Chain Block:
Outer Dia. Inner Dia. Thickness Thickness for replacement
0.5t 48.5 (mm) 25.5 (mm) 3 (mm) 2.7 (mm)
1t 65.5 (mm) 38.5 (mm) 3 (mm) 2.7 (mm)
1.5t/2t/3t 74 (mm) 41.5 (mm) 3 (mm) 2.7 (mm)
5t/10t/20t 85 (mm) 45.3 (mm) 3 (mm) 2.7 (mm)
TABLE 1 - INSPECTION CHART
In chart, F indicates Frequent Inspection, P indicates Periodic Inspection
Note: Following disassembly of the hoist during inspection, a load test is required by ANSI/ASME
B30.21 and should be done before the product is put back into operation.
pg.12
LOCATION CHECK FOR F P
Braking mechanism Slipping under load •
Hard to release •
Brake parts: Brake Discs Glazing •
Oil contamination •
Pawl: Ratchet Excessive wear •
Pawl: Spring Corrosion: stretch •
Hook Chemical damage •
Operation •
Deformation •
Cracks (dye penetrant, magnetic
particle, or other suitable detection
method)
•
Hook retaining members Not tight or secure
(Pins, Bolts, Nuts)
Not tight, secure or damaged •
Hook Latch Damaged; does not close •
Suspension Members (Sheaves, Hand-wheels, Chain attachments,
Suspension bolts or pins)
Excessive wear •
Cracks • •
Gears Distortion •
Broken or worn teeth •
Cracks •
Inadequate lubrication •
Load Block: Suspension housing Distortion • •
Crack • •
Trolley: Supporting structure Possible inability to continue
supporting loads or damaged
•
Bolts, Nuts, Rivets Not tight or secure •
WARNING Labels Removed or illegible •
Hoist Lever Bent, cracked •
Proper operation Unusual sounds •
IMPORTANT
Any deficiency found on this inspection chart should be corrected before the hoist is put back into service.