Pulsafeeder Eclipse Model 75 - Manual (Page 45)

39
9. Inspection and Wear Limits
Inspect internal pump components as follows:
9.1.1 Bearings
Inspect bearing bores (2) and end surfaces for wear and scoring. If wear or scoring is present on the end surface
of the bearing, the bearing can be flipped to expose the undamaged face to the gear side. Bearing should be
replaced when both ends show wear and/or scoring, or when the bores have reached the replacement limit (see
chart).
9.1.2 Shafts
Both the idler and the drive shaft should be inspected carefully for scoring, wear, and any signs of cracking or
chips in the surface of the ceramic material. No cracks or chips are allowed. Shafts should be replaced if they
show signs of cracks or chips anywhere on the surface, if they are deeply scored, or if they have reached their
replacement limit (see chart).
9.1.3 Gears
Gears can be measured for dimensional change to their length and outside diameter. Gear teeth should also be
visually inspected for wear and damage. Gear teeth can be damaged due to solids moving through the pump,
which will affect only some teeth, or excessive pressure, which will distort the outside tips of all teeth. Gears that
have reached their replacement limits (see chart) or show signs of physical damage or distortion should be
replaced. Backlash can be checked by temporarily inserting the two gear/shaft assemblies into known good
bearings and observing gear tooth mesh and backlash.
9.1.4 Housing Liner
The housing liner should be visually inspected for scoring, wear, and steps on the ID of the two gear bores. See
chart for specific limits.
9.1.5 Special Note, Viscosity
The viscosity of the pumped product will affect the service limits of your Eclipse Standard/Eclipse Hypo pump.
Fluids with higher viscosities will usually be more tolerant of wear and allow longer maintenance intervals.
Fluids with low viscosities will usually require more frequent maintenance, as they are less tolerant of clearances
between the pump’s internal surfaces. Each application is different, and only regular inspection and good records
will determine what the correct maintenance interval is for your application.