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E N G L I S H
6. MAINTENANCE
Every 500,000 cycles the tool should be completely dismantled and components replaced where worn, damaged or when
recommended. All 'O' rings and seals should be replaced with new ones and lubricated with Molykote 55M grease before
assembling.
WARNING: Read Safety Instructions on page 4 to 6.
WARNING: The employer is responsible for ensuring that tool maintenance instructions are given to the
appropriate personnel.
WARNING: The operator should not be involved in maintenance or repair of the tool unless properly trained.
WARNING: The tool shall be examined regularly for damage and malfunction.
The airline must be disconnected before any servicing or dismantling is attempted unless specifically instructed otherwise.
It is recommended that any dismantling operation be carried out in clean conditions.
Prior to dismantling the tool it is necessary to remove the nose assembly. For simple removal instructions see the nose
assemblies section, pages 11.
For total tool servicing, we advise that you proceed with dismantling of sub-assemblies in the order shown below.
6.1 TRIGGER UNIT
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Remove the pin 38 and extract the trigger unit 39-40-41-42.
6.2 VERTICAL TRIGGER UNIT (FROM 43 TO 48)
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To remove this unit it is necessary to disassemble the PNEMATIC PISTON ASSY.
6.3 PNEUMATIC PISTON UNIT
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Unscrew the oil drain screw 35 and bleed the oil.
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Place the tool in an upside-down position in a vice. Take care to use soft jaws so not to damage the body 37.
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Unscrew the 2 nuts 73 (key 10 mm), extract the end plug lock 75 and pay attention to piston 68 which could violently
eject due to spring 65.
Unscrew the rod guide 62 by means of a 25 mm barrel wrench. In this condition the vertical trigger unit (from 43 to 48)
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can be extracted by pressing the rod 43.
If necessary, separate stem 66 from piston 68, but remember that these two parts for the reassembling must be joint
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applying LOCTITE 222 sealing onto the thread of bolt 76.
6.4 HYDRAULIC PISTON UNIT
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Unscrew the outer casing 4, the coupling sleeve 5 and the piston connection 6. Unscrew the 2 screws 33 an d extract
protect ion 21. Unscrew lock screw 26 and move the pipe 27 inside the cylinder 19.
Detach piston 7 from the piston-rod-punch unit. For this purpose insert the 20 mm wrench behind piston 7 and the 32
•
mm wrench in head 18, then unscrew. Unscrew the screws 17 and extract limit stop 16 and spring 15, then pull out the
hydraulic piston.
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To replace the lip seal 83 remove the Seeger circlip ring 12.
6.5 PISTON-ROD-PUNCH UNIT
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Place the pneumatic cylinder at the respective circumference sparing into the vise.
Draw off the spring 25.
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Unscrew the head 18 with a 32 mm wrench.
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In this way the parts 24, 23, 22 can be extracted.
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CAUTION: Priming is ALWAYS necessary after the tool has been dismantled and prior to operating.
Item numbers in bold refer to the General Assembly drawing and parts list (pages 16-17).
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