PA SERIES
OM-06575
MAINTENANCE & REPAIR
PAGE E - 18
the impeller capscrew (7). Immobilize the shaft and
secure the the impeller by torquing the capscrew
to 225 ft. lbs. (2700 in. lbs. or 31 m. kg.).
Pump Casing Installation
(Figure 2)
Install the casing gasket (6) over the pump casing
studs (4 and 5). Remove the hardware temporarily
securing the seal plate to the pedestal. Use a suit
able hoist and sling to position the volute over the
impeller and slide the studs through the seal plate
and pedestal mounting holes.
(Figure 3)
Install the bottle oiler bracket (12) over the volute
studs. Secure the bracket and pump casing with
the hardware (13, 14,and 15). Reconnect the hose
(48) to the connector (11) in the seal plate and se
cure it with the hose clamp (10).
Suction Head And Wear Ring Installation
(Figure 2)
If the wear ring (51) was removed, chill the wear
ring by refrigeration and heat the suction head.
Slide the wear ring into the suction head until fully
seated and allow it to cool.
The wear ring
must
seat squarely in the
suction head; otherwise binding and/or ex
cessive wear will occur. Use caution when
handling hot parts to prevent burns.
The wear ring is secured to the suction head with
the spiral pins (50). Drill three evenly spaced
3/16‐inch diameter x 3/4‐inch deep holes through
the wear ring and into the suction head. Tap the
spiral pins into the holes until fully seated.
Install the suction head gasket (52). Position the
suction head over the studs (53) and secure it with
the hardware (14 and 15).
Turn the impeller shaft by hand and check for any
scraping or binding and correct it before putting
the pump into service.
Discharge Check Valve Assembly and
Installation
(Figure 1)
The flapper and gasket are the only serviceable
parts of the check valve. If the flapper requires re
placement, remove the hardware securing the
cover and gasket. Separate the valve cap and re
place the flapper.
Install the valve cap gasket and secure the cap with
the previously removed hardware.
Support the discharge check valve assembly (5)
using a sling and a suitable lifting device. Secure
the discharge check valve assembly and gasket
(6) to the pump assembly (1) using the hardware
(2, 3 and 4).
Priming Chamber Assembly And Installation
(Figure 4)
Clean and inspect the components of the priming
valve (1). Inspect the linkage and ensure the orifice
button (not shown) squarely engages the valve
seat. Replace the orifice button if required (see
Priming Chamber Removal and Disassembly
for orifice button removal).
If the orifice button was removed, screw the new
orifice button into the linkage bar until fully seated.
Align the hole in the linkage bar with the holes in the
bracket and reinstall the pivot pin. Secure the pivot
pin with the previously removed “e‐clip”.
Adjust the orifice button seating as necessary by
screwing the orifice button into or out of the linkage
bar. Proper adjustment is achieved when the ori
fice button fully seats against the orifice before the
linkage bar on the float bottoms against the
threads on the orifice button. When adjustment is
complete, install and tighten the lock washer and
hex nut securing the orifice button.
Install the strainer (6) and priming valve gasket (4).
Lower the float into the priming chamber (5) and
secure the priming valve with the previously re
moved hardware (2 and 3).
(Figure 1)
Install the baffle (18) and gasket (19) and use a
sling and suitable lifting device to position the prim
