Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
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15. This step is crucial for the proper assembly of the double mechanical seal, failure to do so
properly can cause damage to the pump.
16. Take the back cover (with the seal housing inside) and carefully slide thru the studs and shafts
pushing it to the back until making contact with the secondary rotating face (
12Q
) ; use the dowel
pins to center the part with the gear case.
WARNING: Operating the pump without all four dowel pins in place will cause severe damage
to the pump.
17. Secure the back cover to the gear case with the hexagonal socket head cap screws (
28
) and
tighten them firmly.
28
25
18. Place the O-ring (
12D
) on the inside groove of the stainless steel rotary holder (
12B
). Insert the
coil springs (
12C
) on the inside holes of the holder.
19. Lubricate the inside diameter of the O-ring (
12E
) and place it on the inside groove of the holder
and make sure it is in place.
12B
12E
12F
12A
12D
12C
26
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
