OPERATING INSTRUCTIONS - TM-5-4320-255-130007

OPERATING

INSTRUCTIONS

TROUBLE SHOOTING OR INSPECTION FOR WEAR OR

DAMAGE

The 251 Sump Pump can be completely submerged, but

a water-tight exhaust hose ( 1" dia. hose) to the surface of

For the most efficient operation of the Pump,

particularly against high heads, - it is necessary that the

s u m p liquid should be maintained at all times. For

i n s t a l l a t i o n s requiring deeper submergence, additional

clearance between the Impeller (56) and the Impeller Cover

lengths of the same or larger diameter hose can be used;

(52) be limited. This clearance is set at .010" at the factory.

under no circumstances should smaller hose be used as it

When, due to wear, this clearance has increased to about

will restrict the exhaust and impair the efficiency of the

1/32", an adjustment can be made by removing enough of

Pump.

the Impeller Cover Shims (53) to obtain the original .010"

clearance. This simple adjustment will prolong the life of

When pumping from a ditch or

sump, set the Pump on a

Impeller and maintain the high efficiency of the Pump. The

board or flat stone or suspend

it a few inches off the

Impeller Cover Shims (53) are different colors to identify

b o t t o m of the sump. The less

mud, sand and gravel

the various thicknesses. White is .025", brown is .010",

pumped, the longer the Pump will

last.

blue is .005" and green is .003".

If the water is very dirty, protect the Pump by setting it

After long service, it may be necessary to remove some

in a mesh basket, or screen it in by some other method.

of the Impeller Shims (46) to eliminate excessive clearance

Should the inlet become clogged, lift the Pump from the

between the hub of the Impeller (56) and the face of the

water and stop the motor. Water running back through the

Impeller Hub Bushing (2). To make the adjustment, remove

discharge hose will usually flush the dirt from the Inlet.

the Impeller and remove some of the Impeller Shims from

the Arbor (47). Replace the Impeller and tighten the Arbor

The rate of flow from the oil chamber to the motor is

Nut (54). Rotate the Impeller. Repeat this procedure until

regulated by a filter vent plug (39) The oiler is

enough shims have been removed to cause a slight drag on

correctly set at the factory, but since flow varies somewhat

the Impeller. T h e n add one .010" Shim. Note: After

with temperature a n d oil viscosity, adjustment may

removing the Impeller Shims, be sure to adjust the Impeller

sometimes be necessary. The Pump motor should use about

Cover to obtain the .010" clearance as explained in the

cup of oil for each four hours of operation.

preceding paragraph.

To regulate the oiler, remove the Back Head (36) and

The Governor is

adjusted at the factory to produce an

turn

the

tilter

vent

plug

Impeller speed of

approximately 5200 rpm. After long

located in the face of the Back Head. Turning the plug in

service, some parts

may become worn to the extent that

decreases the flow; backing the Plug out increases the

readjustment of the

Governor is necessary to maintain the

flow. Under no circumstances should the Plug be backed

rated speed.

out beyond the face of the Back Head.

To readjust the Governor, turn the Governor Adjusting

Nut (24) on the Governor Stem (21). One half turn of the

Nut varies the speed approximately 50 rpm. Screwing the

PREVENTIVE

MAINTENANCE

Nut farther onto the Governor Stem increases the speed;

After each four hours of operation, unless an air line

backing it off decreases the speed.

lubricator is used, replenish the chamber in the Back Head

A d j u s t i n g a new or reassembled Governor so that

(36) with oil.

dimension "A" shown below is 1-13/16'' usually results in

Weekly, or as experience dictates, insert grease,

the proper speed. However, this is only an approximate

following the same procedure as recommended in

setting; to obtain the correct setting, a tachometer should

"Preparation for Use."

be used.

At regular intervals, shut off the air supply and unscrew

the Air Strainer Plug (34) from the Air Strainer Cap (33).

Be sure that no one is in line with the opening in the Cap.

Then turn on the air momentarily. After the accumulated

dirt is blown from the Air Strainer Screen (35), shut off the

air and replace the Plug. Occasionally, unscrew the Air

Strainer Cap from the body, withdraw the Screen and wash

it in Kerosene or other solvent. Frequency of cleaning the

Weight-type Governor

A =1 13/16" (46 mm)

Air Strainer depends on the condition of the air line.