PA A42R-316-360, Instruction Book

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ATEX HYDROKINETIC ROTATING CLEANING HEADS
SAFETY NOTE
SN01 Rev. 00 Date 22/04/2020 Pag. 10 of 10
3.7.3 EXTRAORDINARY MAINTENANCE AND REPAIR
Please check the internal parts every 300 / 400 hours of work in order to verify any premature wear of the parts.
Replacement of the dynamic seals is recommended:

A42R-316: pos. 23 and 32

A42R-316-360°: pos. 3 and 16

MI42-316: pos. 21 and 36

A80RA: pos. 5 and 19

MI63A: pos. 3 and 23
Verify that the slide surfaces of the seals are in good conditions: replace the parts if worn out. Check also bearings,
bushings and gears: replace if damaged.
Use only original “PA” spare parts.
Lubricate only with silicone grease (14.6552.00) and do not use mineral grease or oil otherwise internal parts will be
subject to rupture.
If exposed to freezing temperatures, make sure that the cleaning head is completely emptied after use in order to
prevent the freeze.
For all details regarding assembly and disassembly of the cleaning head, please see the Maintenance Manual.
3.7.4 INHIBITION AND RE-INSTALLATION OF THE HEAD
For a working order inspection of the apparatus or for maintenance/replacement, the removal of the head from the
application is permitted only when the apparatus is not under pressure and in the absence of a potential explosive
atmosphere.
Before reusing or reutilizing the head after washes, general maintenance or any other necessary operation, follow the
warnings as seen on paragraph 3.1.1. of this safety note
After reinstalling the device, and before placing the equipment under pressure, verify the correct tightness between
the connections and apparatus and its efficiency.
3.7.5 REPLACEMENT OF PARTS & SPARES
It is necessary to replace the head and/or its components when, upon the user’s discretion, the safety functions are
not guaranteed during working. The replacement of head parts with others not identical to those original cannot
guarantee the design conditions established by P.A. S.p.A.
3.8 PREVENTION & REPRESSIVE ACTIONS (PRECAUTIONS)
The user must use suitable measures to eliminate a/o reduce potential explosive atmospheres externally to the head
applying the Directive 99/92/EC.
The user must pertain to what established in order to:

Avoid, however possible, the formation of explosive atmospheres (concentration-classification limits of the
areas);

Choose qualified control systems;

Avoid the creation of lively trigger sources (prevention).