Ingersoll Rand Diaphragm Pump 666250-EC4-C

O-Ring Replacement and Sleeve Installation

Replace O-rings if worn or damaged

Bushing and Spacer Installation

Install one (121) sleeve bushing

Install the remaining (121) bushing

Remove (7) or (7 / 8) diaphragms

Check for scratches or marks on (1) diaphragm rod

Inspect all parts for wear or damage

Replace worn or damaged parts with new parts as required

Lubricate diaphragm rod with Key-Lube O-ring lube

Lubricate O-ring with Key-Lube O-ring lube

Use ARO pn / 98931-T bullet (installation tool) to install O-ring on diaphragm rod

Insert spacer with correct orientation

Lubricate and insert spool (111)

Install gasket (117) and plate (107)

Packing Cup and Piston Installation

Lubricate and install packing cup (110)

Insert piston (109) into air inlet side cavity

Disassembly of Plate and Gaskets

Push on the inner diameter of (111) spool to force the (109) piston out

Continue pushing the (111) spool and remove it

Check the (111) spool for scratches and gouges

Remove components from the air section (exhaust side)