avdel AV 30 Manual De Instrucciones página 37

Servicing the Tool

Screw the *Piston Bullet - Front on to the front of the Piston 1.

Place the Body 2 nose up on a bench. Then using a soft mallet, tap the Piston 1 towards the rear of the Body
and out the back end, taking care not to damage the bore within the Body.

Note that when removing the Piston 1, oil on the pull side of the Piston will leak from the front and rear of the
Body 2.
 When removing the Piston 1, the Front Seal Gland 15 may be retained on the Piston shaft. If this is the case,
unscrew the *Piston Bullet - Front and pull the Front Seal Gland off of the Piston.
 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.

If the Front Seal Gland 15 is still retained in the Body 2. Place the Body nose up on a bench and then push the
Front Seal Gland from the front until it is free from the recess within Body. The Front Seal Gland can then be
removed from the back end of the Body. Take care not to damage the bore within the Body when doing so.

Using a small flat screwdriver remove O-Ring 23 and Spiral Back-up Ring 34, from the external groove on the
Front Seal Gland 15, and discard. When removing the seals, take care not to damage the surface of the Front
Seal Gland with the screwdriver.

Remove Rod Seal 25 and Wiper Seal 22, from the internal grooves on the Front Seal Gland 15, 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.

Using a small flat screwdriver, remove O-Ring 21 from the Body 2 and discard.

Remove the spare *Quick Coupler - Female from the Quick Coupler – Male 10 on the Hydraulic Hose – Pull 19.
 Do not remove Set Screw 42 from the Body 2.
Assemble in reverse order to dismantling noting the following points:

Clean all components before assembling.

To aid assembly of seals apply a light coating of Molykote
and the assembly tools.

Slide O-Ring 23 over the Front Seal Gland 15 and into the external groove. Insert the Spiral Back-up Ring 34 in
the same groove, in front of the installed O-Ring. Refer to the General Assembly and Parts List for the correct
orientation of the O-Ring and Spiral Back-up Ring.

Press the Front Bearing Ring 24 into the internal recess within the Front Seal Gland 15 and then install Rod
Seal 25 behind the Front Bearing Ring. Install the Wiper Seal 22 in the front recess of the Front Seal Gland.
Refer to the General Assembly to ensure the correct orientation of the Rod Seal and Wiper Seal.

Lubricate the surface and leading edge of the Body 2 bore into which the Front Seal Gland 15 is to be installed
with Molykote ® 111 grease.
All numbers in bold refer to the General Assembly and Parts List on pages 15, 16 and 17.
* Service Kit on page 10
12
® 111 grease to all seals, seal grooves, back-up rings