Stanley AV50 Instruction And Service Manual page 15

O R I G I N A L I N S T R U C T I O N
• 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 assembled *Piston Extractor Tool over the shaft of Piston 1 and screw the *Piston Extractor fully
into the font of the Body 2. Refer to the illustration below for the correct assembly of the *Piston Extraction Tools.
Piston Extractor
Piston Extractor
Piston Extrac on
Piston Extraction Rod
• Using a 55mm spanner screw the *Piston Extraction Rod into the *Piston Extractor until it contacts and presses the Piston
1 into the Body 2. Continue to screw the *Piston Extraction Rod clockwise until only 10mm of the Piston Extraction Rod
is protruding from the front face of the Piston Extractor. The Piston will now be inserted into the main bore of the Body 2.
Refer to the illustration below.
Piston Extractor
Piston Extractor
Piston Extrac on
Piston Extraction Rod
• Manually push the end of the Piston 1 fully into the Body 2 until it stops against the rear of the bore. Remove the *Piston
Extractor, *Piston Extraction Rod and *Piston Seal Sleeve from the Piston and Body.
• Fill the front of the Body 2 with Enerpac® HF hydraulic oil. Oil level should be just above the front inlet bore into the Body.
• Insert the Valve Rod 16 into the Piston 2, with the end with the machined flats first.
• Slide O-Ring 23 over the Seal Gland 17 and into the external groove. Insert the Anti-Extrusion Ring 27 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 Anti-Extrusion Ring.
• Press the Front Bearing Ring 24 into the internal recess within the Seal Gland 17 and then install Rod Seal 25 behind the
Front Bearing Ring. Install the Wiper Seal 22 in the front recess of the 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 Seal Gland 17 is to be installed with Molykote®
111 grease.
• Connect the spare *Quick Coupler - Female to the Quick Coupler - Male 10 on the Hydraulic Hose – Pull 19. This will allow
air to be released from the pull side Piston 1 when inserting the Seal Gland 17.
• Insert the Seal Gland 17 over the Piston 1 and push into the Front of the Body 2 until the internal threads in the front of
the Body are exposed. Take care not to damage the O-Ring 23 and Anti-Extrusion Ring 27 on the Body threads.
• Lubricate both the internal thread in the Body 2 and the external thread on Nose Cap 15 with MolyLithium Grease.
• Insert the Nose Cap 15 into the front of the Body 2. Screw the Nose Cap 15 fully into the Body using a large adjustable
spanner or clamp. In doing so, this will install the Seal Gland 17 into the correct position within the Body. A small amount
of oil will be expelled from the Hydraulic Hose – Pull 19.
All numbers in bold refer to the General Assembly and Parts List on pages 17, 18 and 19.
* Service Kit on page 12.
Rod
Rod
E N G L I S H
Piston Extrac on
Piston Extraction Sleeve
Sleeve
Piston Extrac on
Piston Extraction Sleeve
Sleeve
15