Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
M
A
IN
T
E
N
A
N
C
E
Installing the Single Mechanical Seals
1. Special tools are not required to install the mechanical seals; you can assemble the
components by hand.
2. Insert the dowel pins (
25
) into the gear case, slide them carefully, if you feel resistance stop and
check the surface finish of the pins and the gear case; replace the pins if necessary and clean the
holes using a soft towel.
3. Place the seal housing (
12J
) into the back cover. It has a drag pin in the front for the static
face (
12G
).
4. Tighten the button head screws (
13
) to secure the seal housing in the back cover.
12J
13
5. Place the O-ring (
12H
) on the static face (
12G
).
6. Insert the static face (
12G
) in the back cover. Make sure the notch is aligned with the drag pin.
There is no physical contact between the static face and the seal housing; the O-ring limits the
position of the static face. This step is crucial for the correct assembly of the mechanical seal;
failing to do so properly can cause damage to the mechanical seals, the rotors and can even alter
the integrity of the pump.
1
2
2
J
J
13
3
12H
12G
DRAG PIN
NOTCH
20
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
