Gorman-Rupp Pumps 112G60-B 1214462 and up - Manual (Page 33)

10 SERIES OM−05174
MAINTENANCE & REPAIR PAGE E − 10
grooved pin (40). Line up the slot in the stationary
seat with the grooved pin in the seal plate.
Press the stationary subassembly (consisting of
the stationary seat, O-rings and stationary ele-
ment) into the seal plate until the stationary seat
bottoms against the seal plate bore. Be sure to line
up the groove pin with the slot in the stationary
seat.
Slide the seal plate onto the shaft and secure it to
the intermediate with the capscrews (24). Be care-
ful not to damage the oil seal lip on the shaft key-
way. Install the O-ring on the shaft that seals the
shaft sleeve to the shaft shoulder.
Slide the rotating subassembly (consisting of the
rotating element, retainer and bellows) onto the lu-
bricated shaft sleeve until the rotating element is
just flush with the chamfered end of the shaft. Lu-
bricate and install the O-ring in the I.D. of the
sleeve. Slide the sleeve and rotating subassembly
onto the shaft until the seal elements contact. Con-
tinue to push the sleeve through the seal until it bot-
toms against the shaft shoulder and O-ring. Install
the seal spring and the spring centering washer
(39).
Reinstall the air vent and piping (25, 26 and 27),
and lubricate the seal assembly as indicated in
LUBRICATION, after the impeller has been in-
stalled.
Impeller Installation And Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Make certain that the seal compo-
nents are seated squarely on the shaft sleeve. Re-
install the impeller key (96). Add a uniform coat of
Never-Seez" or equivalent compound to the shaft
in the area under the impeller and press the impel-
ler onto the shaft. Check the impeller clearance to
ensure that it is within tolerance, (see Impeller
Back Clearance).
Make sure the tapped threads in the impeller shaft
are clean (degreased). Install the impeller washer
and roll pin (94 and 95). Prime the threads of the
socket head capscrew (93) with Loctite Primer-T"
or equivalent and apply four drops of Nutlocker"
or equivalent around the circumference of the
threads, one inch from the end. Reinstall the caps-
crew and torque to 300 ft. lbs. or 3600 in. lbs.(42 m.
kg.). Recheck the impeller back clearance.
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
Lubricate the seal plate O-ring (23) with a very
small amount of oil and install it on the seal plate.
Secure the pump casing (1) to the intermediate as-
sembly (28) with the hardware (70 and 71).
Replace the discharge flange gasket (21) and con-
nect the discharge spool flange (17) and discharge
piping.
Secure the oil sight gauge and bracket (47 and 48).
Remove the plug from the hose (68), reconnect it to
the barbed elbow (67) in the seal plate and secure
with the clamp (69).
Wear Plate And Suction Elbow Installation
Lubricate the wear plate O-ring (76) with Never-
Seez" or equivalent compound and install it in the
groove in the wear plate (74). Press the wear plate
into the suction elbow (85) and secure it with the
hardware (81 and 82).
Lubricate the wear plate O-ring (75) with Never-
Seez" or equivalent compound and install it in the
groove on the wear plate. Secure the suction el-
bow and wear plate to the pump casing with the
hardware (12 and 13). Secure the pedestal foot
(63) to the pump casing using the hardware (81
and 82). Be sure to reinstall any leveling shims
used under the pedestal feet.
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 (11) until
they contact the heads of the wear plate adjusting
screws (10). Loosen the hardware (12 and 13) 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-