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E N G L I S H
6.4 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.
Before proceeding with dismantling, empty the oil from the tool. Remove oil plug 42, oil seal washer 43, bleed screw 48 and
bleed screw washer 49 from the handle assembly and drain the oil into a suitable container.
Prior to dismantling the tool it is necessary to remove the nose assembly. For simple removal instructions see the nose
assemblies section, pages 10-13.
For total tool servicing we advise that you proceed with dismantling of sub-assemblies in the order shown below.
6.5 PNEUMATIC CYLINDER
Remove rubber base 2.
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Place tool, base uppermost in vice fitted with soft jaws.
Using a spanner*, unscrew end plug 3. Pneumatic piston 9 should move upward under spring 11 pressure (it may be
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necessary to exert hand pressure to pneumatic piston 9).
Remove 'O' ring 4.
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Withdraw pneumatic piston 9.
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Remove lip seal 8 and 'O' ring 36.
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Hold piston rod 10 in soft vice jaws to avoid scratching rod diameter.
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Separate piston rod 10 from pneumatic piston 9 by unscrewing piston rod fastening bolt 5 using a spanner*.
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Inspect air tube 12 for damage or distortion. (Air tube is screwed internally into handle and set in position with Loctite®
222) If it is necessary to remove air tube, the base of the air tube will require warming to a temperature of 100 °C to
soften the Loctite adhesive. The air tube 12 can then be unscrewed from the handle using an Allen key*.
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Check spring 11 is not distorted or damaged.
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Assembly is in reverse order to dismantling.
6.6 ROD GUIDE
With tool in upside down position in vice, unscrew rod guide 15 using a spanner* and T-bar*.
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Withdraw rod guide 15.
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Unscrew locknut 13 using an Allen key*, remove seal 14 and 'O' ring 98.
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Remove 'O' ring 16.
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Assembly is in reverse order to dismantling.
6.7 TRIGGER
With tool held in vice, remove pin 26 using a pin punch*.
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Remove trigger 25, pin 22, roller 23 and push wedge 24.
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Gently push on the head of trigger rod 20 and, remove together with 'O' rings 7 and 21, guide 19, lip seal 18 and plug
17.
Assembly is in reverse order to dismantling. Ensure lip of lip seal 18 is towards head of tool.
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*
Refers to items included in the 74200 service kit. For complete list see page 13.
Item numbers in bold refer to the General Assembly drawing and parts list (pages 18-19).
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