WDM AG Series User manual

Self-Priming Pumps
Operation Manual

Operation Manual.
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1. Introduction.
Congratulations! You have purchased a product developed with
the latest technology from WDM Pumps, Inc. (referred to as
“WDM”).
WDM designs and manufactures our products with the highest
quality components. Our experience as a manufacturer and our
special care and dedication in production result in products that
meet the highest standards.
The information contained in this manual is important for the
installation, operation and maintenance of your WDM Self-
Priming pump. Read all instructions carefully before installing
and using the product. Keep this manual for future reference.
Our products are factory tested to ensure proper operation.
Inspect carefully and make sure there are no missing or damaged
pieces from shipping. If, upon delivery, parts are damaged or
missing, make a claim to the shipping company as soon as
possible.
The design of this product, as well as the materials and
processes used in its manufacture provide for proper operation.
However product performance and lifespan depend on
appropriate application, installation, periodic inspection and
general preventive maintenance.
This manual contains instructions for the installation and operation of
your Self-Priming pump. Read these recommendations carefully before
use. Keep this manual for future reference.

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2. Safety Recommendations.
• WDM pumps are designed to operate safely when used and
maintained according to this manual.
• Rotating parts of the pumps are dangerous and can cause
injury. Operators and maintenance personnel should be aware
of and follow safety recommendations.
• The pumps are considered heavy equipment. Handle them with
care.
• To reduce the risk of electrical shock, all wiring of pumps,
motors, overload protection and control panels must be in
accordance with the National Electric Code (NEC) or the
Canadian Electrical Code (CEC) and all applicable state,
province, local codes and ordinances. Requirements will vary
depending on usage and location. Improper grounding will void
the warranty.
• To reduce risk of electrical shock, always disconnect the pump
from the power source before handling or servicing. Cable
should be inspected frequently.
• Never handle connected power cords with wet hands.
• If any product is to be returned, it must be cleaned, sanitized, or
decontaminated as necessary according to any applicable laws
and regulations prior to shipment, to protect employees from
exposure to health hazards.
• Bronze/brass and bronze/brass fitted pumps may contain lead
levels higher than considered safe for potable water systems.
Lead is known to cause cancer and birth defects or other
WARNING.
WDM is not responsible for any damage or accidents that
occur when the instructions given in this manual have not been
followed.
The warranty is only valid when using WDM original spare
parts. Failure to follow these guidelines in installing and starting your
pump will void your warranty.

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reproductive harm. Leaded copper alloys should not be used in
potable water applications. If this pump is for use in a potable
water application, contact manufacturer to determine suitability.
• Loose fitting clothing can easily be caught by the impeller or other
moving parts, therefore do not wear loose fitting clothing when
doing maintenance or service work on the pump. Always wear
appropriate protective equipment, including gloves, safety glasses
or shoes, when installing, servicing or repairing the pump or piping.
• Keep clear of suction and discharge openings.
• Disconnect power before inserting fingers in pump.
• Do not operate pump without safety devices in place. Make sure
lifting handles are securely fastened each time be- fore lifting.
• Replace all safety features and devices that may have been
removed during service or repair.
• During installation, secure the pump so it cannot tip over, fall or
slide from its operating position.
• Do not allow pump to exceed manufacturer’s recommendation for
maximum performance, as doing so could cause the motor to
overheat.
•Operating the pump while the discharge valve is closed will
cause premature bearing and seal failure on any pump. Heat
buildup inside end-suction and self-priming pumps may
generate steam, resulting in dangerous pressures. WDM
recommends that a high temperature switch or pressure relief
valve be installed on the pump body.
• Pumps build up heat and pressure during operation. Allow
sufficient time for pumps to cool before handling or servicing.
• Never pump hazardous materials (flammable, caustic, etc.)
unless the pump is specifically designed and designated to
handle them. Doing so will void the warranty.
Pump coupled to combustion engines.
• Make sure combustion engines have adequate ventilation.
Never operate combustion engines in an enclosed area where
fumes can collect.
• Do not refuel the tank while the engine is running. Shut off
engine and wait until it cools.

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3. General Information.
Receiving.
Pumps should be inspected upon receipt. Make note of damage or
missing parts, if any, and immediately file a claim with the shipping
company. During inspection, if the manual is removed, do not lose or
misplace it.
Storage.
While our pumps are designed to work efficiently after a short period
of storage, best results occur when the pump is kept, as assembled in
the factory, in a storage facility that has a dry atmosphere and
constant temperature. Short term shortage should not exceed 6
months.
If planning to store the pump for more than 6 months, but less than
24 months, the pump should be stored inside an enclosure that is
temperature controlled between 40°F - 120°F (4°C - 50°C). The
enclosure should provide protection from all elements.
Prior to storage, if high humidity is expected during storage, all
exposed areas with paint should be inspected and repainted with a
water base, air dry enamel paint. Then all surfaces should be sprayed
with rust-inhibiting oil. The pump should be kept in its original
storage container. Before starting the pump up, the impeller should
be rotated by hand to see if seal and impeller rotate freely.

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4. Installation.
Location.
The pump should always be as close as possible to the liquid
supply and in no case should the pump be more than 25 feet
above the surface of the liquid supply. The pump should always be
as level as possible. (See Fig. 1).

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Pump Foundation.
Rotation.
Check the direction of the rotation of the pump to be sure that it
agrees with direction indicated on the rotation plate. If the direction
of the rotation is incorrect, consult the following instructions.
For a 3 phase, exchange any two incoming wire leads. For a 1
phase, follow the connection name plate on the motor. All pump units
should rotate clockwise when viewing from the motor end of the
pump. Securely install the pump on a firm footing to make sure the
pump will not move due to vibration.
Suction System.
Use a suction line that is the same size as the pump
port.Using a suction line smaller than the pump port size
can cause internal damage to the pump. Horizontal
suction lines should slope up to the pump to
prevent
trapped air pockets. Support the weight of the suction line
by installing an adjustable stand, pipe clamp or a floor
flange.
Steel base plate
Shims
.25”
.75” to 1.5”

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The suction line must not have holes. The slightest air
leak in the suction line can prevent the pump from priming.
To insure an air tight joint, use pipe thread compound in
all threaded connections in the suction line. . Suction
flanges should also be pulled up tight to prevent air leaks.
Negative Suction
Shut-off Valve
Check Valve
Priming plug
Piping Support
Foot Valve & Strainer
Union
Union

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Positive Suction
Frame Mounted Units
Shut-off Valve
Check Valve
Priming plug
Union
Shut-off Valve
1. Foot Valve & Strainer.
2. Elbow.
3. Incline suction line, 2% grade min.
4. Eccentric Reducer
5. Check Valve
6. Shut-off Valve
7. Flexible Coupling
8. Discharge line.

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Verify the correct alignment between the motor and the pump shafts.
The pump was accurately aligned with the motor at factory, but you
should always verify and realign if required during final installation.
Failure to do it might cause pump malfunction and void the
manufacturer warranty.
Discharge System.
Connect the discharge hose or pipe to the side outlet on
the discharge tee, or to the discharge elbow.
Correct
Incorrect
CAUTION.
Always operate this pump with a strainer on the end of the
suction line to prevent sticks, stones, rags and other foreign matter
from being drawn into the impeller. Clean the strainer regularly to
prevent clogging and insure full flow.
ATTENTION.
WDM does not supply all the accessories (valves,
gauges, pipes, extensions, etc.) mentioned in this operation
manual.

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Electric motor & connections.
Read the motor manufacturer’s instructions, or consult the connection
diagram located either on the motor name plate or inside the cover on
the conduit box. The wiring of the motor and control panel, overload
protection and grounding should be in accordance with State, Province,
Local and National Electrical Code (NEC) or Canadian Electrical Code
(CEC). Be sure the following criteria are met:
1. AC power is within ± 10% of rated voltage with rated
frequency.
(See motor name plate for rating).
OR
2. AC power is within ± 5% of rated frequency with rated
voltage. OR
3. A combined variation in voltage and frequency of ±10% (sum
of
absolute values) of rated values, provided the frequency
variation does not exceed ± 5% of rated frequency.
PumpLubrication.
The pump requires no lubrication. The impeller and seal are the only
moving parts of the pump. These parts are water lubricated and
need no attention.
5. Operation.
Priming.
Remove the priming plug, located in the top of the discharge tee or in
CAUTION.
Do not operate pump without liquid in pump body
as operating dry will result in damage to the seal.

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top of
pump body, and fill the pump body completely with liquid.
Liquid should be as free of solids as possible. In freezing weather,
the pump should be primed with warm water whenever possible, to
prevent damage that might be caused by ice forming inside the
pump.
Starting.
After completing this procedure, the pump is now ready for operation.
Start the pump by applying power to motor as outlined in the motor
instructions.
Shutdown.
Operation may be discontinued by disconnecting electric power.
When the pump has been operating in freezing weather or in liquid
that contains a considerable amount of solids, it is advisable to
drain the pump body by removing the drain plug and flushing the
solids out of the pump body.
Replace the drain plug.
Restart.
Any time the pump is restarted, but especially when the pump has
been drained, check to make sure the pump is refilled back to the
level required for self-priming. The pump is self- priming only when
the body is full of liquid
6. Pump service and repair.
Check valve service.
To clean out or repair a check valve, disconnect the suction piping,
then remove cap screws and suction flange.

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Body, volute and impeller service.
To clean out or repair the body, volute or impeller, disconnect
suction and discharge piping.
Remove the hex nuts and lockwashers and pull the body from the
intermediate coupling. This will expose the O-ring, impeller, impeller
locking screw,
volute and volute gasket. Examine all parts for wear
and tear and replace as necessary.
If the impeller needs to be replaced, pull volute from intermediate
coupling, remove set screw or cap screws and washers, and
unscrew the impeller from the motor shaft. As the impeller is
screwed onto the shaft with right hand thread, break loose by placing
a block of wood against a vane and striking it with a hammer.
When reassembling, be sure to use the required number of shims to
result in an impeller-to-volute clearance of not more than .021”.
Shaft seal service.
When examining or replacing the shaft seal, remove the body and
impeller, impeller shims and rotating member of shaft seal from motor
shaft. This exposes all components of the shaft seal so they can be
examined. When any part shows wear and tear or damage, the
entire shaft seal assembly should be replaced. If a stationary member
needs replacing, pry the used stationary member from the
ATTENTION.
Do not pry the flange off, but rather bump it off with a block
of wood and a hammer. Pull off the gasket together with the weights,
round head screw and lockwasher. All parts should be examined and
parts showing wear or damage should be replaced. When replacing the
gasket and weight assembly onto the pump body, make sure that the
hinge section of the gasket is at the top and that the large weight is on
the pump side of gasket.

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intermediate coupling.
Lightly oil the ring and press the replacement stationary member
over motor shaft and into intermediate coupling.
The motor shaft and inner surface of bellows of rotating member
should be lightly oiled. With the lapped surface facing the
intermediate coupling, slide the rotating member onto the shaft until
the lapped faces of the rotating member and stationary member
are together. Then reassemble the remainder of the pump.
Motor service.
To remove or replace the motor, disassemble the pump. Remove the
cap screws and lockwashers to remove the motor, and base. To
remove the motor from the base, remove the cap screws on hex
nuts.
CAUTION.
All seal parts should be handled with extreme care. Do not
scratch or mar lapped faces.

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7. Sectional.
AE Series.

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Operation Manual.
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Item Description
1Shaft Sleeve
2Impeller
3Volute
4Motor Bracket
5Washer
6Casing
7Suction
8Discharge Gasket / O ring
9Mechanical Seal
10 Volute Pin
11 Slinger
12 Check Valve Gasket
13 Volute Gasket
14 Discharge
15 Base brackets
16 Big Weight
17 Small Weight
18 Motor
19 Square Head Plug
20 Heavy Helical Spring Lock Washers (Inch Series)
21 Hex Cap Screw
22 Hex Bolt - UNC (Regular Thread - Inch)
23 Hex Cap Screw
24 Hex Bolt - UNC (Regular Thread - Inch)

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AG/AD Series.

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Operation Manual.
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Item
It
Description
1
Engine
2
Impeller
3
Shaft Seal
4
Casing
5
Engine Bracket
6
Volute
7
Suction
8
Suction Gasket
9
Volute Gasket
10
Discharge
11
Shaft Sleeve
12
Base Brackets
13
Big Weight
14
Small Weight
15
Hex Nut
16
Round Screw
17
Lock Washer
18
Hex Bolt
19
Lock Washer
20
O-ring
21
Discharge Gasket
22
Drain Plug
23
Volute Pin
24
Cap Screw

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AAG/AAD

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Operation Manual.
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Item Description
1
Casing
2
Engine Bracket
3
O-ring
4
Gasket
5
Suction
6
Discharge Gasket
7
Discharge
8
Volute
9
Volute Gasket
10
Mechanical Seal
11
Impeller
12
Lock Washer
13
Plastic Coupling
14
O-ring
15
Plastic Plug
16
Gasket
17
Engine
18
Hex Socket Head Cap Screw
19
Suction Fitting
20
Metal Frame
21
Hex Bolt
22
Hex Nut
23
Washer
24
Lock Washer
25
Hex Bolt