Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
M
A
IN
T
E
N
A
N
C
E
6. Loosen the hexagonal socket head cap screws (
28
) that secure the back cover to the gear case
(
6
) and extract it through the studs. The back cover is centered by dowel pins (
25
); the pins may
come out with the back cover or stay in the gear case.
12K-O
13
7. When removing the back cover it is possible that the rotating face (
12Q
) will be attached to the
secondary static face (
12P
); handle it with care to prevent any harsh contact of the seal faces with
the shafts.
8. Loosen the hexagonal socket head cap screws (
13
) on the back of the cover to remove the seal
housing. Push with your thumbs from the front of the back cover. Use caution when removing the
housing to avoid any harsh contact.
9. Remove the O-ring (
12K
) on the housing using the O-ring hook.
10. To remove the static face of the secondary mechanical seal (
12P
) hold the housing with the
static face up and pull with your thumbs.
12P
12N
12M
12L
Note:
Always work with the seal face up to prevent the springs from falling out.
11. using the O-ring hook, remove the O-ring (
12N
). Remove the springs (
12M
) if necessary.
12. To extract the rotating components of the secondary mechanical seal slide the seal face off of the shaft (
12Q
)
and remove the O-ring (
12R
) located inside this rotating seal face.
13. With a hexagonal key, loosen the set screws (
12T
) from the drive ring (
12S
) and remove if needed.
14. Repeat these steps to uninstall the rest of the components of the second mechanical seal.
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
23
