Jet L90 - Inspection and Maintenance; Frequent Inspections; Periodic Inspections

INSPECTION AND MAINTENANCE
Prior to initial use, all new, modified, and repaired hoists shall be inspected in accordance with Table 2. Thereafter, inspections
shall be conducted at intervals shown in Table 1; and items to be inspected are indicated in Table 2 by F (Frequent) or P
(Periodic).
Frequent Inspections - Visual inspection by the oeprator or other authorized person. This inspection includes listening for
unusual sounds while the hoist is operated that may indicate deficiencies.
Periodic Inspections - Audible-visual inspection as for Frequent Inspections, with some disassembly to allow a more detailed
inspection if external conditions indicate the need.
Exception: Brakes require more than audible-visual inspection. Check daily by operating hoist with and without load, stopping at
various positions to test holding power and amount of drift, if any occurs. TO ADJUST BRAKE (Refer to Figure 1):
1. Fully tighten nut to position A.
2. Slack off nut from position A to position B and insert cotter key.
TABLE 1 - FREQUENCY OF INSPECTION
SERVICE FREQUENT (F)
INSPECTION
PERIODIC (P)
INSPECTION
Normal Monthly Annually
Heavy Weekly to Monthly Semi-Annually
Severe Daily to Weekly Quarterly
TABLE 2 - INSPECTION CHART
In chart, F indicates Frequent Inspection, P indicates Periodic Inspection
LOCATION CHECK FOR F P LOCATION CHECK FOR F P
Braking mechanism Slipping under load T Hook Retaining
Members
(Pins, Bolts, Nuts)
Not tight or secure T
Hard to release T
Brake Parts Hook Latch Damaged; does not close T
Brake Discs Glazing T Suspension Members
(Sheaves,hand-wheels, chain
attachments, suspension bolts or
pins)
Excessive wear T
Oil contamination T Cracks TT
Pawl; Ratchet Excessive wear T Gears Distortion T
Pawl Spring Corrosion; stretch T Broken or worn teeth T
Hooks Chemical damage T Cracks T
Deformation T Inadequate lubrication T
5% in excess of normal throat
opening
T Load Block; Suspension
Housing
Distortion TT
10E twist from plane of unbent hook T Cracks TT
Cracks (dye penetrant, magnetic
particle, or other suitable detection
method)
T Trolley; Supporting Structure Possible inability to
continue supporting
imposed loads
T
Bolts, Nuts, Rivets Not tight or secure T
WARNING Label Removed or illegible T
Refer to ASME B30.16 for additional information on inspection, test, and maintenance.
3