GORMAN-RUPP PUMPS PRIME AIRE PLUS PA10A60C-B, Инструкция по установке, эксплуатации и техническому обслуживанию с перечнем запасных частей

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OM-06674
PAH SERIES
MAINTENANCE & REPAIR PAGE E - 21
as required before proceeding with seal installa­
tion.
Slide the rotating portion of the seal assembly onto
the shaft sleeve until the rotating element is just
flush with the undercut end of the sleeve. Slide the
shaft sleeve and rotating portion of the seal onto
the shaft until the sealing faces contact. Continue
to push the shaft sleeve until it seats squarely
against the step on the impeller shaft.
Install the seal spring and spring retainer.
After the impeller has been installed, lubricate the
seal as indicated in
LUBRICATION .
Impeller Installation
(Figure 3)
Inspect the impeller and replace it if cracked or
badly worn. If removed, install the roll pin (29) in the
hole in the impeller hub.
Install the impeller key (27) in the shaft keyway.
Align the keyway in the impeller with the impeller
key and press the impeller onto the shaft until fully
seated.
Use a piece of soft bar stock or a wood block to pre­
vent impeller rotation. Align the hole in the impeller
washer (7) with the roll pin in the impeller and install
the washer. Apply “Loctite Threadlocker No. 243”
or equivalent compound to the threads of the im­
peller screw (30). Install the impeller screw and
torque the screw to 250 ft. lbs. (34,5 m. kg.). Re­
move the wood block or metal bar used to prevent
impeller rotation.
Pump Casing and Wear Ring Installation
(Figure 2)
If the wear ring (10) was removed, press the re­
placement ring into the pump casing until fully
seated. Apply “Loctite Threadlocker No. 243” or
equivalent compound to the threads of the
setscrews (6) and install them in the holes in the
wear ring until snug.
The wear ring must seat squarely in the
pump casing or binding and/or excessive
wear will result.
Lubricate the O‐ring (7) with light grease and install
it in the groove in the O.D. of the seal plate.
Carefully position the pump casing over the impel­
ler. Install the hardware (8 and 9) on the studs (5)
and use the hardware to draw the pump casing
over the seal plate shoulder until tight.
(Figure 1)
If removed at disassembly, install the gasket (20)
over the studs (19) and secure the suction spool
(26) to the pump casing with the previously re­
moved hardware (21 and 22).
Secure the suction spool to the support assembly
(24) with the previously removed hardware (6 and
25).
Discharge Check Valve Reassembly and
Installation
(Figure 1)
If the discharge check valve (33) was disas­
sembled to replace the flapper or cover O‐ring,
position the flapper in the valve body and check to
ensure free movement.
Install the valve cover O‐ring and secure the cover
to the body with the previously removed hardware.
Apply a small amount of light grease to the dis­
charge flange gasket to hold it in place and posi­
tion it against the pump casing flange. Support the
discharge check valve assembly using a sling and
a suitable lifting device. Using the previously re­
moved hardware, secure the discharge check
valve assembly and flange gasket to the pump as­
sembly (1). Secure the discharge check valve to its
support bracket using the previously removed
hardware.
Priming Chamber Assembly and Installation
(Figure 6)
Clean and inspect the components of the priming
valve (1). Inspect the linkage and ensure the orifice