Gorman-Rupp Pumps 112D60-B-TCD914L6 1520501 and up - Manual (Page 34)

10 SERIES OM-06592
MAINTENANCE & REPAIR PAGE E - 14
the shaft until fully seated. Make sure the seal
spring is squarely seated over the step on the back
of the impeller.
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
is required between the impeller and seal plate to
achieve maximum pump efficiency. Use a feeler
gauge to measure this clearance and add or re­
move impeller adjusting shims as required.
Make sure the threads on the impeller capscrew
(14) and the tapped threads in the impeller shaft
are clean (degreased). Install the roll pin and im­
peller washer (13 and 15). Apply four drops of
“Loctite Threadlocker No. 242” or equivalent com­
pound around the circumference of the capscrew
threads, one inch from the end of the capscrew.
Install the capscrew and torque to 145 ft. lbs. or
1740 in. lbs. (20 m. kg.).
Pump Casing Installation
(Figure E‐3)
Ensure that the seal plate O‐ring (17) is installed
and lubricated with light grease or a very small
amount of oil. Secure the pump casing to the ped­
estal assembly with the hardware (29 and 65).
Reinstall the bottle oiler (56). Remove the plug from
the hose (59), reconnect it to the male connector
(58) in the seal plate and secure with the clamp
(60).
If removed, replace the discharge flange gasket
(33) and secure the reducer (34) to the pump cas­
ing with the previously removed hardware (35, 36
and 37). Reconnect the discharge piping.
Wear Plate And Suction Head Installation
(Figure E-3)
Lubricate the O‐rings (17 and 18) with “Never‐
Seez” or equivalent and install them in the grooves
in the wear plate (16). Press the wear plate into the
suction elbow (19) and secure it with the hardware
(43 and 44).
Using the lifting eye and hoist used for removal, po­
sition the suction elbow against the pump casing
secure the suction elbow and wear plate to the
pump casing with the hardware (29 and 45).
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the wear plate is also rec­
ommended for maximum pump efficiency. To ad­
just this clearance, back off the jam nuts (44) until
they contact the heads of the wear plate adjusting
screws (43). Loosen the hardware (51 and 68) se­
curing the wear plate to the suction elbow. Tighten
the adjusting screws evenly, no more than a half
turn at a time, while rotating the impeller shaft by
hand until the wear plate scrapes against the im­
peller. Back off each of the adjusting screws 1/2
turn, then tighten the jam nuts until they are snug
against the suction head. Re‐tighten the hardware
(51 and 68).
Secure the pedestal foot (20) and suction elbow
support (21) to the pump casing using the hard­
ware (29, 30 and 32). Reinstall any leveling shims
used under the pedestal foot and suction elbow
support, and secure them to the base with the pre­
viously removed hardware.
Suction Check Valve Assembly
(Figure E-3)
Install one stainless steel flat washer on each side
of the bearing pivot arm. Position the check valve in
the check valve body with the 1/2” diameter core
holes toward the pump side of the check valve
body. Secure the check valve and pivot caps to the
check valve body with the previously removed
hardware.
NOTE
Be sure the check valve is positioned so that the
1/2” diameter core holes face toward the interior of
the pump.
Secure the check valve body to the suction elbow
with the “Victaulic” coupling (39). Be sure the rub­
ber gasket is properly seated and not damaged.
Reach through the cover plate access opening
and check the operation of the check valve to en­
sure proper seating and free movement.
Final Pump Assembly
Be sure the pump and engine are securely
mounted to the base and that they are properly
aligned. If used, removed the eyes bolt used to lift
component parts.