Gorman-Rupp Pumps T10A3S-B /FM,/WW - Manual (Page 36)

OM-05290 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 15
A clearance of .020 to .025 inch (0,51 to 0,64 mm)
between the impeller and the wear plate is also rec­
ommended for maximum pump efficiency. This
clearance can be obtained by removing an equal
amount of shims from each rotating assembly
shim set (21) until the impeller scrapes against the
wear plate when the shaft is turned by hand. After
the impeller scrapes, add approximately .020 (0,51
mm) of shims to each shim set.
NOTE
An alternate method of adjusting this clearance is to
reach through the suction port with a feeler gauge
and measure the gap. Add or subtract rotating as­
sembly shims accordingly.
Suction Head And Wear Plate Installation
(Figure E‐1)
Clean any scale or debris from the contacting sur­
faces in the pump casing that might prevent a
good seal with the suction head or interfere with
the wear plate (38). Inspect the wear plate for wear
or damage and replace as required. Slide the wear
plate into the pump casing until fully seated.
Replace the suction head gasket (40) and lubricate
it with a generous amount of No. 2 grease. Use a
suitable hoist and sling to position the suction head
against the pump casing, and secure it with the
hardware (42, 43, 44 and 45).
NOTE
To ease future disassembly, apply a film of grease
or `Never‐Seez' on the suction head, or any surface
which contacts the pump casing. This action will re­
duce rust and scale build‐up.
Suction Check Valve Installation
(Figure E‐1)
Inspect the check valve components and replace if
badly worn.
Reach through the cleanout cover opening with
the check valve and secure it with the pivot caps (7)
and hardware (8, 9 and 10).
NOTE
If the check valve body (4) was removed, install the
check valve and secure the body to the suction
head with the shoulder type clamp (11).
PRESSURE RELIEF VALVE
MAINTENANCE
(Figure E‐1)
The suction head is equipped with a pressure relief
valve (46) to provide additional safety for the pump
and operator (refer to Liquid Temperature And
Overheating in OPERATION).
It is recommended that the pressure relief valve as­
sembly be replaced at each overhaul, or any time
the pump overheats and activates the valve. Never
replace this valve with a substitute which has not
been specified or provided by the Gorman‐Rupp
Company.
Periodically, the valve should be removed for in­
spection and cleaning. When reinstalling the relief
valve, apply `Loctite Pipe Sealant With Teflon No.
592', or equivalent compound, on the relief valve
threads. Position the valve as shown in Figure E‐1,
with the discharge port pointing down.
LUBRICATION
Seal Assembly
(Figure E‐2)
Before starting the pump, remove the vented plug
(10) and fill the seal cavity with approximately 84
ounces (2,5 liters) of SAE No. 30 non‐detergent oil,
or to a level at the middle of the sight gauge (29).
Clean and reinstall the vented plug. Maintain the oil
at this level.