Woods-powr-grip N4950AIR User Manual download pdf (Page 13)

Rev 2.0/12-12 11 N4950/HV11FAIR: #35105

TESTING SCHEDULE

Perform these tests when placing the hand cup in service

initially

and

each time following a repair

or modification

. Test all features and functions of the hand cup (see OPERATING FEATURES,

OPERATION and MAINTENANCE). Correct any deficiency and retest before using the hand cup.

Note: See MAINTENANCE topics to follow for additional directions about inspecting and testing

specific hand cup components.

MAINTENANCE SCHEDULE

Unless specified elsewhere in this

INSTRUCTIONS

manual, the hand cup does not require

maintenance on a routine basis. Instead, maintenance must be performed whenever a

deficiency is indicated by routine inspections or tests. Any maintenance warranted must be

performed before resuming normal operation of the hand cup.

VACUUM PAD MAINTENANCE

Friction Coefficient

The friction coefficient represents the hand cup's ability to resist load slippage when the load is

oriented in any position except horizontal. If the contact surface of either the load or the

vacuum pad is not clean, dry and in good condition, slippage is more likely to occur.

The Maximum Load Capacity of this hand cup is based on a friction coefficient of 1. However, a

vacuum pad's ability to maintain this friction coefficient is reduced by factors such as

contamination, wear, age and exposure to sunlight, as well as the condition of the load's contact

surface (see INTENDED USE: LOAD CHARACTERISTICS). A pad that has surface contamination must

be thoroughly cleaned (see Cleaning discussion to follow). Over time, the rubber in a pad may

experience hardening or leaching of chemicals, resulting in stiffness or surface glaze. A pad that

exhibits wear, stiffness or glaze must be replaced.

In addition, every pad should be replaced on a regular basis, preferably after no more than 2

years, to ensure that the friction coefficient is not compromised. If necessary, contact your

dealer or Wood's Powr-Grip for more information.

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Woods-powr-grip N4950AIR User Manual Page 13