Owner's manual

Pump still pumps even at zero capac-

ity setting

• Improperly adjust micrometer knob. Readjust capacity

setting.

• Insufficient discharge pressure. Correct condition (e.g.,

install a back pressure valve).

Gear noise • Excessive backlash. Consult service facility.

• Worn bearings. Consult service facility.

• Wrong or insufficient lubricant. Replace or replenish lubri-

cant.

Loud knock with each stroke • Excessive gear set wear. Consult service facility.

• Worn bearings. Consult service facility.

Noisy operation in liquid end • Nosie in check valves. Ball checks move up and down

with some force. A distinct “clicking” noise is normal,

especially in metal piping systems.

SYMPTOMS REMEDIES