Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
M
A
IN
T
E
N
A
N
C
E
14. With the subassembly
assembled, insert the rotary holder
on the shaft and push evenly until it
reaches the static face placed
previously on the back cover. Repeat
this procedure to install the other
single mechanical seal on the next
shaft.
15. At this point you have completed
the assembly of the single
mechanical seals, continue with the
assembly of the rotor.
Uninstalling the Double Mechanical Seals
1. By hand, remove the stainless steel rotary holder subassembly (
12B-F
) by grabbing and pulling
out from the rotating face (
12F
). When pulling, the static face (
12G
) might come together.
2. To inspect the O-rings inside, remove the rotating face by gently pulling out the rotary holder;
inside are the springs (
12C
) and the O-ring (
12D
). CAUTION: the springs are loose. Finally,
remove the O-ring (
12E
) which is on the rotary holder groove.
3. Remove the O-ring (
12A
) housed in the rotary holder on the front groove. Sometimes O-rings
can come out of their grooves and get stuck to other components.
4. On the back cover (
5
) side pull out the static face (
12G
) and the O-ring (
12H
). Avoid any harsh
contact on the seal faces.
25
28
6
12B-F
12P
12Q-T
12H
12G
12A
5. To remove the seal housing (
12L
), O-rings (
12K
and
12N
), springs (
12M
) and the static face of
secondary seal (
12P
) it is necessary to remove the back cover of the pump.
22
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
