Operating Manual
Maintenance
01/07/00
21
Proportioning Pumps
Disassemble and clean both Proportioning Pumps annually. Inspect the pistons and
cylinders for mars or scratches, which may cause leakage or damage to the packings, and
replace as necessary. As a preventative maintenance precaution, replace the piston and
cylinder packings on an annual basis.
Pump Bases
1.
Completely depressurize the system.
2.
Remove the valve cover using an adjustable wrench.
Inspect the valve cover o-ring and replace as required. It is good practice to liberally
coat the o-ring with grease before inserting the valve cover back into the pump base.
Also, check the chamfer around the cavity to insure that there are no sharp edges,
which could damage the o-ring and prevent proper seal.
3.
Remove the valve ball and inspect it for nicks and scratches. Replace as required.
Remove the ball seat with the special tool provided and inspect it for nicks and
scratches. Replace as required
4.
Inspect the face of the gasket for damage and replace as required. Reassemble the
pump base.
