Ingersoll Rand Diaphragm Pump 666250-1E4-C

Orient spacer legs away from blocking internal ports

Lubricate and insert (111) spool

Lubricate and install (110) packing cup

Insert (109) piston into air inlet side cavity

Ensure (110) packing cup lips point outward

Install gasket and replace plate

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 for scratches and gouges on the (111) spool

Inspect and replace old parts with new parts as necessary

Take precautions to prevent cutting O-rings upon installation

Lubricate O-rings with Key-Lube

Re-torque fasteners following restart

Service is divided into two parts

O-Ring Replacement and Sleeve Installation

Replace O-rings if worn or damaged

Bushing and Spacer Installation

Install one (121) sleeve bushing

Pilot Rod and O-Ring Installation

Carefully push (118) pilot rod into bushings

Retain pilot rod on each end with components

Remove balls, O-rings, and seats

Remove screw, washer, diaphragms, and washer

Ensure not to scratch or mar the surface of the diaphragm rod