Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
16
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
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Be sure to read and understand the Safety section of this manual before servicing
your pump.
Disconnect power to the unit and lock out the mechanism.
Handle all wet parts with caution; prevent harsh contact or scratches and always
place them on a clean surface to avoid damage.
The preventive maintenance procedures and inspection comprises the change of the mechanical
seal, O-ring, and gasket replacements, checking the oil level, checking the alignment of the
coupling as well as noise, and vibration issues.
Removing the Rotors
1. Remove the cover nuts (
21
) and flat washers (
22
); use a wrench or a six points female socket.
Remove the front cover (
1
).
2. Carefully remove the front cover gasket (
27
); you may use the O-ring hook.
3. Remove the pump housing (
4
) carefully. It is fixed and centered over the back cover (
5
) using
dowel pins (
25
). Pull straight out to slide the housing through the housing studs (
14
). The pins
may be pulled out along the housing or stay on the back cover. You can remove the studs to
increase the working area. The plug (
53
) is for sealing a hole in the housing which was used
during machining and has no specific use.
Note:
To remove the studs you may use the nut-and-locknut technique (see annex B).
27
53
14
22
4
1
5
25
21
4. Block the rotors with the aid of a wrench using the drive shaft (
9
) end. Using a six points female
socket loosen the rotor nuts (
11
). First loosen the left side rotor (
2
) nut torque, then change to the
