avdel AV 50 73435-02000 Manual De Instrucciones página 38

Servicing the Tool

Remove Rod Seal 25 and Wiper Seal 22, from the internal grooves on the Seal Gland 17, and discard. When
removing the seals, take care not to damage the surface of the Front Seal Gland with the screwdriver.

Remove the Front Bearing Ring 24 and check the part for wear or damage. Discard if necessary.

Remove the placing tool from the vice and empty the hydraulic oil from the front of the tool and then re-clamp
the tool in the vice as before. Remove the spare *Quick Coupler – Female from the Quick Coupler - Male 10.
 Connect the spare *Quick Coupler - Male to the Quick Coupler - Female 11 on the Hydraulic Hose – Return 18.
This will release any pressure from the return side of the Piston 1 and ease the removal of the Piston.

Place the *Piston Extraction Sleeve inside the bore of the *Piston Extraction Rod and then screw the assembly
into the centre of the *Piston Extractor.

Place the complete *Piston Extractor Tool assembly over the shaft of Piston 2 and screw the *Piston Extractor
fully into the font of the Body 2. Screw the *Piston Extraction Rod into the *Piston Extractor until it stops
against the front face of the Piston. Screw the Collet Adapter 40 on to the Piston 1 until the front face is flush
with the end of the Piston. Align the hole in the Collet Adapter with the slot in the end of the Piston and then
insert Locking Pin 41. Refer to the illustration below for the correct assembly of the *Piston Extraction Tools.
Piston Extractor
Piston Extraction

Using a 55 mm spanner, unscrew the *Piston Extraction Rod from the *Piston Extractor - this will slowly pull
the Piston 1 from the bore of the Body 2. Continue to unscrew the *Piston Extraction Rod until the Piston is
pulled to stop against the front face of the *Piston Extractor. Lift and remove the *Piston Extraction Tools
together with the Piston from the front of the Body.
 Remove the Pin 41 and Collet Adapter 40 from the Piston 1, enabling the Piston to be removed from the Piston
Extraction Tools.

Remove the Valve Rod 16 from the Piston 1 and check the part for wear or damage. Replace if necessary.
 Remove the placing tool from the vice and empty the hydraulic oil from the tool. Remove the spare *Quick
Coupler – Male from the Quick Coupler - Female 11.

The Piston Seal 26 is a 2-piece seal consisting of an external sealing ring and an inner o-ring. Using a small
knife, cut through the external sealing ring and remove from the external groove on the Piston 1. Then using a
small flat screwdriver remove the inner o-ring from the Piston, and discard. When removing the seals, take care
not to damage the surface of the Piston.
 Do not remove Set Screw 42 from the Body 2.
All numbers in bold refer to the General Assembly and Parts List on pages 16, 17 and 18.
* Service Kit on page 10
12
Rod
Piston Extraction
Sleeve