Milwaukee 9568 - Manual (Page 15)

INSPECTION AND MAINTENANCE CHECK LIST
ELECTRIC POWERED OVERHEAD CHAIN HOIST
Type of Hoist ______________________________________________________ Capacity (Tons) ____________________________________________
Location _________________________________________________________ Original Installation Date _____________________________________
Manufacturer______________________________________________________ Manufacturer’s Serial No. ____________________________________
Item Frequency of Inspection Possible Deficiencies OK Action
Frequent Periodic
Required
Daily Monthly 1-12 Mo.
Operating Controls * * * Any deficiency causing improper operation
Limit Switches
* * * 1. Any deficiency causing improper operation
2. Pitting or deterioration
Brake Mechanism
* * * 1. Slippage or excessive drift
2. Glazing, contamination or excessive wear
Hooks
* * * Excessive throat opening 15% bent or twisted more than 10
degrees, damaged hook latch, wear, chemical damage,
worn hook bearing. To find cracks, (use dye penetrant,
magnetic or other suitable detection methods)
Suspension Lug (if used)
* * * Cracks, excessive wear or other damage which may impair
the strength of the lug. To find cracks, (use dye penetrant,
magnetic particle or other suitable detection methods)
Chain
* * * Inadequate lubrication, excessive wear or stretch, cracked,
damaged or twisted links, corrosion or foreign substance
Hook and Suspension
* Cracks, bending, stripped threads
Lug Connections
Pins, Bearings, Bushings
* Excessive wear, corrosion, cracks, distortion
Shafts, Couplings
Nuts, Bolts, Rivets * Looseness, stripped and damaged threads, corrosion
Sheaves
* Distortion, cracks, and excessive wear.
Build-up of foreign substances
Housings, Load Block
* Cracks, distortion. Excessive wear, internal build-up of
foreign substances
Wiring and Terminals * Fraying, defective insulation
Hoist Reversing
Contactor, other Electrical
* Loose connections, burned or pitted contacts
Apparatus
Supporting Structure Damage or wear which restricts ability to support
and Trolley (if used) * imposed loads
Nameplates, Decals,
* Missing, damaged or illegible
Warning Labels
NOTE: Refer to Maintenance and Inspection Sections of the Hoist-Maintenance Manual for further details.
FREQUENCY OF INSPECTION
Frequent — Indicates items requiring inspection daily to monthly. Daily inspections may be performed by the operator if properly designated.
Periodic — Indicates items requiring inspection monthly to yearly. Inspections to be performed by or under the direction of a properly designated period. The exact
period of inspection will depend on frequency and type of usage. Determination of this period will be based on the user’s experience. It is recommended
that the user begin with a monthly inspection and extend the periods to quarterly, semi-annually or annually based on user’s monthly experience.
Figure 10A — Recommended Inspection and Maintenance Check List
NOTE: This inspection and maintenance check list is in accordance with our interpretation of the requirements of the Safety
Standard for Overhead Hoists ASME B30.16. It is, however, the ultimate responsibility of the employer/user to interpret and
adhere to the applicable requirements of this safety standard.
14
Milwaukee Electric Tool Corporation
13135 West Lisbon Road
Brookfield, Wisconsin 53005
TEL: (800) 729-3878
1. Brake needs adjustment 1. See BRAKE ADJUSTMENT, page 9.
2. Broken shading coil on brake frame 2. Replace shading coil or complete brake frame assembly.
Motor brake “buzz” (anytime hoist is running)
TROUBLE SHOOTING (Continued)
1. Brake needs adjustment 1. See BRAKE ADJUSTMENT, page 9.
2. Low voltage 2. Check voltage at the hoist reversing contactor while the hoist is lifting a load. Voltage should be no less than 90% of
the voltage specified. 115 volt hoists are particularly subject to voltage drop problems due to their high current draw.
Conversion to 230 volt operation is suggested in extreme cases.
Motor brake noise or chatter (while starting hoist)