Avdel 74201 Betriebsanleitung Seite 36

M a i n t e n a n c e
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
The employer is responsible for ensuring that tool maintenance instructions are given to the appropriate personnel.
The operator should not be involved in maintenance or repair of the tool unless properly trained.
The air line 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 35, Oil Seal Washer 36, Bleed Screw 10 and Oil
Seal Bleed Washer 9 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 8-9.
To o l S e r v i c i n g
For total tool servicing we advise that you proceed with dismantling of sub-assemblies in the order shown below.
P n e u m a t i c C y l i n d e r
•
Remove Rubber Base 74.
•
Place tool, base uppermost in vice fitted with soft jaws.
•
Using a spanner*, unscrew Base Casing 75. Pneumatic Piston 68 should move upward under Spring 65 pressure (it may be
necessary to exert hand pressure to Pneumatic Piston 68).
•
Remove 'O' Ring 71.
•
Withdraw Pneumatic Piston 68.
•
Remove Lip Seal 69 and 'O' Rings 78 and 28.
•
Hold Pneumatic Piston Rod 66 in soft vice jaws to avoid scratching rod diameter.
•
Separate Pneumatic Piston Rod 66 from Pneumatic Piston 68 by unscrewing piston rod fastening Bolt 76 using a spanner*.
•
Inspect Air Supply Tube 79 for damage or distortion. (Air tube is screwed internally into handle and set in position with Loctite
If it is 100% necessary to remove air tube, the base of the air tube will require warming to a temperature of 100ºC to soften the
®
Loctite adhesive. The Air Supply Tube 79 can then be unscrewed from the handle using an Allen key*.
•
Check Spring 65 is not distorted or damaged.
•
Replace any damaged seals and springs.
•
Assembly is in reverse order to dismantling.
•
To replace Piston Rods 67: they are screwed and locked with Loctite
necessary to warm up the base of the piston rod to 100ºC to soften Loctite
R o d G u i d e
•
With tool in upside down position in vice, unscrew Rod Guide 62 using a spanner* and T-bar*.
•
Withdraw Rod Guide 62.
•
Unscrew Adaptor Nut 64 using an Allen key*, remove Lip Seal 63 and 'O' Ring 61.
•
Remove 'O' Ring 60.
•
Replace any damaged seals.
•
Assembly is in reverse order to dismantling.
Tr i g g e r
•
With tool held in vice, remove Pivot Pin 38 using a pin punch*.
•
Remove Trigger 40, Roller Pin 42, Roller 41 and Push Wedge 39.
•
Gently push on the head of Trigger Rod 43 and remove together with 'O' Rings 48 and 44, Guide 45, Lip Seal 46 and Valve
Locking Plug 47.
•
Assembly is in reverse order to dismantling. Ensure lip of Lip Seal 46 is towards head of tool.
S w i v e l A i r I n l e t ( 7 4 2 0 0 - 1 2 7 0 0 )
•
Remove Flexible Rubber Cover 88.
•
Using flat spanner remove Air Supply Assembly 115 and Bridge Washer 95.
•
Unscrew Sleeve 70.
•
Using circlip pliers remove Circlip 97 and Sintered Filter 98.
•
Assemble in reverse order of dismantling.
* Refers to items included in the 74200 Service Kit. For complete list see page 11.
Item numbers in bold refer to the General Assembly drawing and Parts List (pages 14-15).
12
I M P O R T A N T
Safety Instructions appear on page 4.
® 222 into Base Casing 75. To remove them it may be
®
55M grease before assembling.
® 222. The piston rods can be then removed with a vice.
®
222)