Gorman-Rupp Pumps T8A60S-4045H 1514489 and up - Manual (Page 46)

OM-06522 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 19
Rotating Assembly Installation
(Figure 3)
Secure the pump casing ring (37) to the rotating
assembly with the inner hardware (8 and 36).
NOTE
The inner capscrews are 1/4 inch (3,2 mm) shorter
than the outer capscrews.
Install the bearing housing and seal plate O‐rings
(38) and lubricate them with light grease.
Install a hook or strap through the lifting eye cast
into the top of the bearing housing and, using a
suitable lifting device, ease the rotating assembly
into the pump casing. Be careful not to damage
the O‐rings.
Install the rotating assembly adjusting shims (34)
under the pump casing ring using the same thick­
ness as previously removed.
Support the rotating assembly by installing four
1/2-13 UNC-2B by 6‐inch long capscrews (not
supplied) through the casing ring and into the
pump casing at the 10 o'clock, 2 o'clock, 4 o'clock
and 8 o'clock positions. With the rotating assembly
thus supported, remove the lifting device from the
eye in the top of the casing.
Continue to press the rotating assembly into the
pump casing until the outer hardware (8 and 35)
can be installed. Install the hardware and use it to
press the rotating assembly into the pump casing
until fully seated. Remove the 6‐inch long caps­
crews and replace them with the remaining four
capscrews and lockwashers (8 and 35).
To set the impeller and wear plate clearance refer
to the Back Cover Installation And Adjustment.
Suction Check Valve Installation
(Figure 3)
Inspect the check valve assembly (47) and replace
it if badly worn.
NOTE
The check valve assembly must be replaced as a
complete unit. Individual parts are not sold sepa­
rately.
Reach through the back cover opening with the
check valve and position the check valve adaptor
in the mounting slot in the suction flange (46). Align
the adaptor with the flange hole, and secure the as­
sembly with the check valve pin (3).
NOTE
If the suction or discharge flanges were removed,
replace the respective gaskets, apply `Permatex
Aviation No. 3 Form‐A‐Gasket' or equivalent com­
pound to the mating surfaces, and secure them to
the pump casing with the attaching hardware.
Back Cover Installation And Adjustment
(Figures 3 and 10)
If the wear plate (21) was removed for replace­
ment, carefully center it on the back cover and se­
cure it with the hardware (24 and 25). The wear
plate must be concentric to prevent binding when
the back cover is installed.
The clearance between the impeller and wear plate
is adjusted using four adjusting screws (42) and
locking collars (34). There are 18 detents on the
I.D. of each locking collar. Indexing the collars one
detent on the adjusting screws represents approxi­
mately .005 inch (0,13 mm) of wear plate clear­
ance. The recommended clearance between the
wear plate and the impeller is .010 to .020 inch
(0,25 to 0,50 mm).
Replace the back cover and wear plate O‐rings (22
and 27) and lubricate them with a generous
amount of No. 2 grease. Clean any scale or debris