Gorman-Rupp Pumps 13D1-L70EE 1258889 and up - Manual (Page 26)

OM-05462 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
To ease installation of the intermediate O‐ring (19),
lubricate the O‐ring with water or a very small
amount of oil. Install the O‐ring on the intermediate.
Position the intermediate against the engine bell­
housing and secure it with hardware (15 and 16,
Figure 1).
Assemble the O‐ring into the stationary seat. Press
the stationary seat into the intermediate bore until
fully seated. A push tube cut from a length of plastic
pipe would aid this installation. The I.D. of the tube
should be approximately the same as the I.D. of the
seal spring.
Subassemble the rotating element into the retainer
and bellows. Apply a drop of light oil on the preci­
sion finished faces; never use grease. Use even
pressure to carefully press this subassembly onto
the shaft sleeve (6) until the rotating element is just
flush with the chamfered end of the sleeve.
Slide the sleeve and assembled rotating portion of
the seal onto the shaft until the seal faces contact.
Continue to push the sleeve through the seal until it
seats squarely against the shaft shoulder.
Install the seal spring and spring centering washer.
Lubricate the seal as indicated in LUBRICATION,
after the impeller has been installed.
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (4) as previously removed. Apply anti‐seize
to the shaft threads and screw the impeller onto the
shaft until tight.
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the intermediate is nec­
essary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.
Pump Casing Installation
(Figure 2)
Secure the pump casing (1) to the intermediate
with the hardware (17 and 18). Be careful not to
damage the O‐ring.
See Figure 1 and secure the pump casing to the
base (5) with the hardware (13, 14, 15 and 16). Be
sure to reinstall any leveling shims used under the
mounting feet of the pump casing.
Back Cover Installation
(Figure 2)
Inspect the wear plate (20) and replace it if badly
worn or grooved. Install the wear plate on the back
cover using the hardware (22 and 23).
Clean any scale or debris from the back cover
shoulder and pump casing which might prevent a
good seal.
NOTE
Apply a film of `Never‐Seez' or equivalent com­
pound on the back cover shoulder or any surface
which contacts the pump casing to ease future dis­
assembly and to reduce rust and scale build up.
Replace the back cover gasket (31) and slide the
back cover assembly (27) into the pump casing.
Be sure the wear plate does not scrape against the
impeller.
Secure the back cover assembly to the pump cas­
ing using the hardware (25 and 26). Do not over
tighten the wing nuts; they should be just tight
enough to ensure a good seal at the back cover
shoulder.
Suction Check Valve Installation
(Figure 2)
Inspect the check valve components and replace
as required.
If disassembled, reinstall the plate (38) and weight
(37) on either side of the gasket (39) and secure the
parts by installing the rivet (36) and peening the
end of the rivet.
Position the check valve assembly (35) in the suc­
tion port with the check valve plate (38) toward the
inside of the pump casing. Install the suction flange
(32) and secure with the nuts (34). Check the oper­
ation of the check valve to ensure proper seating
and free movement.
Final Pump Assembly
(Figure 1)
Be sure the pump and engine are securely
mounted to the base.