Waterous HL Series, Инструкции по капитальному ремонту

Страница: 30 / 57

F − 1031, Section 4321
Page 30 of 57
Reassembly - Inspection and Repair
Reassembly − Inspection and Repair
Mechanical Seal
Always install a new mechanical seal during reassembly. Follow seal installation
instructions carefully.
Impeller Shaft
Examine shaft for severe scratches, grooves and corrosion paying special atten­
tion to oil seal and mechanical seal shaft journals. If present, replace shaft. Minor
scratches in non-critical areas will not affect pump performance. Also check for
cracks, pitting, twisted splines and damaged keyways and replace the shaft if
found.
Volute Body and Intake Fitting
Examine for cracks, corrosion or other damage. Replace defective parts.
Clean out the mechanical seal weep passageways in the pump volute as shown
below.
Impellers and Wear Rings
Check the wear rings and impeller hubs for deep grooves and scratches.
Wear rings are located as follows:
Main Stage Impeller: Separate wear ring installed in pump intake fitting.
High Pressure Impeller: Inside diameter of separator plate acts as wear ring.
Carefully measure the outside diameter of the impeller and the inside diameter
of the wear ring/separator plate.
If the difference between these measurements exceeds .020 in. / .51 mm or if
the components are scratched or grooved, replace the impeller and wear ring
separator plate.
NOTE: The wear ring may be removed from the pump intake fitting by cut­
ting the ring in two places and then prying the pieces out of the intake fit­
ting. Install new wear ring by pressing it into the bore in the intake fitting.
Areas to be check and cleaned.
Wear Ring
Intake Fitting