Gorman-Rupp Pumps 112B60-B 758209 and up - Manual (Page 31)

OM-01828 10 SERIES
MAINTENANCE & REPAIR PAGE E - 11
“Never‐Seez” to the shaft in the area under the im­
peller and press the impeller onto the shaft. Check
the impeller clearance to ensure that it is within tol­
erance, (see Impeller Back Clearance).
Make sure the tapped threads in the impeller shaft
are clean. Install the impeller washer and roll pin
(85 and 86). Prime the threads of the socket head
capscrew (87) with “Loctite Primer‐T” or equivalent
and apply four drops of “Loctite 243‐31” adhesive
sealant or equivalent around the circumference of
the threads, one inch from the end. Reinstall the
capscrew and torque to 300 ft. lbs. or 3600 in.
lbs.(42 m. kg.). Recheck the impeller back clear­
ance.
NOTE
If the pump casing (1) has not been secured to the
pedestal assembly, this clearance may be mea­
sured with a feeler gauge and adjusted according­
ly.
Pump Casing Installation
Install the shaft key (34) and connect the rotating
assembly to the power source. Be sure the pump
and power source are proper aligned, (see Align­
ment in INSTALLATION) before installing the lev­
eling shims and base mounting hardware.
Lubricate the seal plate O‐ring (10) with a very
small amount of oil and install it on the seal plate.
Secure the pump casing to the intermediate as­
sembly (15) with the hardware (55 and 56).
Replace the discharge flange gasket (7) and con­
nect the discharge spool flange (4) and discharge
piping.
Secure the bottle oiler and bracket (32 and 33). Re­
move the plug from the feed tube (53), reconnect it
to the barbed elbow (52) in the seal plate and se­
cure with the clamps (54).
Wear Plate And Suction Head Installation
Lubricate the suction head O‐ring (61) with “Never‐
Seez” or a small amount of grease and press the
wear plate (59) into the suction head (68). Secure
with the hardware (63 and 64).
Lubricate the wear plate O‐ring (60) with “Never‐
Seez” or a small amount of grease and install it on
the wear plate. Secure the suction and wear plate
to the pump casing with the hardware (102 and
103). Secure the pedestal foot (48) to the pump
casing using the hardware (66 and 67). Be sure to
reinstall any leveling shims used under the pedes­
tal feet.
A clearance of .015 inch ( 0,38 mm) between the
impeller and the wear plate (59) is also recom­
mended for maximum pump efficiency. Set this
clearance by adjusting the wear plate. Back off the
jam nuts (101) until they contact the heads of the
wear plate adjusting screws (100). Tighten the ad­
justing screws evenly, no more than a half turn at a
time, while rotating the impeller shaft until the wear
plate makes contact with the impeller. Back off
each of the adjusting screws a half turn, and tight­
en the jam nuts until they are snug against the suc­
tion head. The clearance should now be correct.
Secure the check valve flange (72) and the suction
head gasket (97) to the suction head with the hard­
ware (69, 70 and 71).
Suction Check Valve Installation
Press the drive sleeve bearings (76) into the bear­
ing pivot brackets (75). Slide the brackets and as­
sembled bearings onto the two check valve shafts
(74) and secure with the grooved pins (77).
Apply a thin coat of “Loctite Threadlocker No. 271”
or equivalent to the threads of the button head
capscrews (79 and 80) and secure one shaft to the
valve plate (78) and the other shaft to the flange
seat (81).
Inspect the molded valve assembly (84) for wear
and replace as necessary. Secure the valve to the
valve plate using the hardware (82 and 83).
NOTE
Be sure to center the check valve on the check valve
seat before securing with the mounting hardware.
Secure the flange gasket (90) and the check valve
assembly to the check valve flange using the re­
cessed screws (89). Check the operation of the
check valve to ensure proper seating and free
movement.