Maintenance
Ampco Pumps Company
Page 7
November 2011
Annual Maintenance
It is important to perform an annual maintenance check of the pump in addition to the
preventative maintenance procedures listed on pages 13 and 14. Annual maintenance
practices are as follows:
Check the gear case bearings by measuring the shaft’s radial movement with a dial
indicator (Figure 22, A). If the movement is greater than or equal to the rotor-to-body
clearance found on page 28 (Table 8) the bearings should be replaced.
Remove the gear casing cover (See page 21 for disassembly information) and inspect the
gears for wear and damage (Figure 22, B). Also check for backlash and looseness.
Inspect the rotors for signs of wear and stress cracks around the areas defined in Figure
22, C. Replace, if necessary.
Check the pump clearances detailed on page 28 to determine pump wear. Pump wear can
be compensated by increasing pump speed.
Figure 22: Annual Maintenance Checks
C
Check
Check Gears
B
Check Bearings
A
Cleaning
All wetted parts are designed and manufactured to be acceptable by 3A Sanitary Standards.
The body, rotors, and seals can be easily disassembled and cleaned simply by removing the
cover and rotor nuts. Pump disassembly information begins on page (ZP2 Manual page16).
The ZP3 pumps is clean-in-place (CIP) capable allowing CIP solution to reach all surfaces
inside the pump. The fluid velocity (typically 5 ft/sec) and differential pressure (30 psi
recommended) are critical components of a correct CIP setup. For additional support, please
contact the Engineering Department at Ampco Pumps Company (414-643-1852).
