Stenner Classic Series Basic Service Manual

Basic Service Manual

Classic Series

Basic Service Manual

Classic Series

SECTION I – General Information

Safety Precautions/Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Tool List/Cleaning Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Part Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SECTION II – Installation

Review Proper Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Spill Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Vertical Wall Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Suction Line, Compression Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Rain Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SECTION III – Separating & Reconnecting Subassemblies

Rivet and Slot Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Separating Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Reconnecting Feed Rate to Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Reconnecting Pump Head to Feed Rate . . . . . . . . . . . . . . . . . . . . . . . 12

SECTION IV – Maintenance Basics – Tube

Tube – How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Tube Failure – Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Tube Fundamentals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Tube Failure – Causes & Corrective Action . . . . . . . . . . . . . . . . . 16-22

Tube Replacement & Centering . . . . . . . . . . . . . . . . . . . . . . . . . . 23-29

SECTION V – Maintenance Basics – Feed Rate Control

Feed Rate Control (FRC) – How It Works . . . . . . . . . . . . . . . . . . . . . 30

Feed Rate Wear – Definition & Causes . . . . . . . . . . . . . . . . . . . . 31-32

Feed Rate Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-36

SECTION VI – Maintenance Basics – Motor

Gear Case – How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Gear Case Wear – Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Gear Case Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Motor – How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Motor Failure – Definition & Causes . . . . . . . . . . . . . . . . . . . . . . . . . 39

Rotor Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Coil Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41-44

SECTION VII

Quick Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

INTRODUCTION

The Stenner Classic Series chemical feed pumps are mechanical and will, during their service
life, require scheduled maintenance. The purpose of this manual is to identify the five wear
parts (pump tube, roller assembly, lifter, cam, and index plate) that will eventually require
replacement, along with other maintenance basics. Best practice tips, such as a spill recovery
to eliminate chemical leakage, as well as corrective action techniques will be covered.

2

Section I General Information

Safety Precautions Before Working on a Stenner Chemical Feed Pump

Hazardous Pressure/Chemical Exposure

To reduce risk of chemical exposure, the use of proper
personal protective equipment is mandatory when
working on or near chemical metering pumps.

Shut off water source. Use caution and bleed off all
resident system pressure prior to attempting service
or installation.

Use caution when disconnecting discharge tubing
from pump. Discharge tubing may be under pressure
and may contain chemical.

NOTICE:

Please refer to Stenner Installation and Maintenance
Manual for safety hazards and notices.

Important icons used in this manual

BEST PRACTICE

Factory recommended

NOTE

Additional information

IMPORTANT!

Key for optimum performance

Tool List/Cleaning Supplies

• #2 Phillips head screwdriver

• Flat blade screwdriver

• 3/8" open end wrench (to change index pin lifter)

• Stenner grease (AquaShield

• Fantastik

®

or similar (non-citrus) all purpose cleaner

• Needle-nose pliers

• Utility knife

®

)

3

4 General Information

Part Identification Stenner Classic Series Chemical Feed Pump

Three Basic Subassemblies

Section II Installation

Review Proper Installation

5

0-25 psi

26-100 psi

6 Installation

Spill Recovery

In case of tube rupture, chemical drains back into solution tank,
preventing spillage on the ground/floor and keeps chemical from
collecting in tube housing.

Vertical Wall Installation

This type of installation is r
chemical away from pump parts.

ecommended by factory to keep

Suction Line

Suction line is 3" from tank bottom. This prevents picking up
sediment, which can cause blockage in the check valve duckbill
and discharge line.

Allow slack in suction/discharge tubing so pump tube fittings
can flex. This prevents stress on tubing and tube fittings,
reducing the chance for breakage and leaks.

7

Compression Seal

NOTE Additional information

Beveled ends of f
Tubing should bottom into all fittings.

errules face tube fittings

.

8 Installation

Rain Roof

Recommended in all outdoor or wet environments. Pump motor
is ventilated, and water intrusion can cause motor damage.

Section III Separating & Reconnecting

Subassemblies

Rivet and Slot Identification

9

10 Separating & Reconnecting Subassemblies

Separating Subassemblies

1. Turn the pump off and unplug the power cord.

2. Hold the feed rate control section and turn the pump head

clockwise until it stops.

3. Pull the pump head straight out.

4. Hold the motor assembly, grasp the feed rate control

section and turn clockwise until it stops, and pull it
straight out.

Reconnecting Feed Rate to Motor

1. Before reconnecting the feed rate control to the motor,

confirm pressure spring is in place and place feed rate
control on the shaft.

2. Turn the feed rate control counterclockwise to line up the

flat side of the motor shaft (d shaft) with the flat side of
the spider (in the feed rate control) and push straight on.

3. Push and turn the feed rate control until the rivets (on the

gear case) are inside the rivet holes on the feed rate.

4. Turn counterclockwise until it locks into place and the

“bump” on the feed rate mounting plate fits into the
indentation in the gear case cover.

11

NOTE Additional information

The arrow on the feed rate control should be on
top and confirm the bump is in the indentation.

12 Separating & Reconnecting Subassemblies

Reconnecting Pump Head to Feed Rate

1. Put the pump head (with main shaft) into the feed rate

control and turn it counterclockwise until the shaft falls
into place.

2. Push the pump head (toward the feed rate), while turning it

counterclockwise, to line up the rivet holes on the pump
head with the rivets on the feed rate control.

3. Continue to push until the rivets are inside the holes and

the snap lock engages.

4. Turn the pump head counterclockwise to secure the rivets

in the rivet slots, firmly attaching the pump head.

NOTE Additional information

Tubes must be horizontal
when completed.

Section IV Maintenance Basics – Tube

TUBE (wear part) How it works

The tube is squeezed by two of the three rollers that move
along the tube. As the roller moves, the compressed section
generates a vacuum, creating a self-priming function. The
remaining two rollers repeat the process and the rotation
creates a pumping action.

13

14 Maintenance Basics – Tube

Tube Failure Definition

The general cause of most tube failures is a lack of routine
maintenance. A tube failure is indicated by a leak or a lack of

output. A diamond pattern (where the tube presses against
the pump head housing) indicates excessive back pressure,
which could be caused by calcium blockage, clogged duckbill, or
system pressure in excess of pump tube rating. An oval pattern
indicates worn rollers and/or the tube reaching the end of its
service life. Tubes can rupture without either pattern apparent.

Tube

Roller

The tube can rupture or break. A rupture normally occurs

at the point betw
where the roller leaves the tube. A
past the suction fitting. The tube is the workhorse of the
pump. It is perishable and eventually has to be changed.

een the discharge tube fitting and the area

break or rip occurs just

Tube Fundamentals For maximum tube life

Determine cause of tube failure before installing new tube

• Natural wear, end of service life.

• Blockage, excessive pressure, worn/damaged parts:
locate and correct problem.

15

IMPORTANT!

Key for optimum performance

Remember to check tube psi rating against
application psi. All tubes (1, 2, 3, 4, 5 & 7) are
rated to 0-25 psi; 1, 2 & 7 are rated to 26-100 psi.

Continued...

16 Maintenance Basics – Tube

Tube Failures Causes and Corrective Action

Excessive back pressure at the point of injection

Blockage or restriction located inside the injection fitting
portion of the check valve due to calcification or mineral
deposits.

Corrective Action

Insert a round shank screwdriver through injection fitting

1.

into the pipe to locate or break up accumulated deposits.
If screwdriver can’t be inserted, drill the deposit out of
the injection fitting. D
pipe wall.

2. Replace duckbill.

o not drill through the opposite

Excessive back pressure at the point of injection

Blockage or restriction of the (check valve) duckbill due to
insoluble sediments or particulates from the bottom of
the tank.

Corrective Action

1.

Replace suction/discharge tubing and clean sediment
from tank bottom.

2. Position suction weight 3" from tank bottom.

3.Use strainer.

4. Replace duckbill.

BEST PRACTICE

Factory recommended

Replace duckbill with every tube change.

17

Split along tube side

Rubbing along roller assembly and pump head housing edge.

Corrective Action

Center tube at time of new tube installation.

1.

NOTE Additional information

Tube will not center if wrist
twists during installation,

tening the tube) or if

(shor
rollers are worn.

Continued...

18 Maintenance Basics – Tube

Frozen rollers in roller assembly (wear part)

Chemical intrusion.

A cracked pump head housing

Wear, chemical exposure, or incompatibility.

Corrective Action

1.

Pump head housing and roller assembly must be cleaned
and wiped free of chemical residue or replaced if corroded
or cracked. Rollers need to turn freely but without
rocking/tilting from side to side.

2. Replace roller assembly and/or cracked housing.

NOTE Additional information

Normal r
result of the rollers’ inability to fully squeeze the
tube

check for roller bore wear, hold each roller (at the top
and bottom) between y
rocks back and forth, replace the roller assembly.

oller wear can cause a lack of output as a

. The wear is generally in the bore of the roller. To

our thumb and index finger

. If it

BEST PRACTICE Factory recommended

Mount pump vertically and use spill recovery to
run chemical back to tank in the event of tube
failure.

preventing spillage on the ground/floor and keeps
chemical from collecting in tube housing.

Chemical drains back into solution tank,

19

Vertical
Mount

Spill
Recovery

NOTE Additional information

Screws are self-tapping; back off screws to find
original thr

alternate bosses and position them opposite each
other. The pump housing must flex to avoid pump head
cracking. Do not use more than two screws.

eads.

ew bosses are stripped, use

If scr

Continued...

20 Maintenance Basics – Tube

Tube leaks around the fitting

Corr

• Using pliers which can break internal seals and twist
the tube.

• Turning the fitting inside the tube when centering a
replacement tube or when connecting suction/discharge
lines.

• Using Teflon Tape preventing ferrules from seating into
tube fitting.

• Stress on tube fitting from a tight radius in the
suction/discharge tubing.

• Crushed ferrules from over tightening or use of pliers.

ective Action

1.

Only finger tighten connecting nut. Do not use pliers.
Do not use Teflon tape. Hold tube fitting when tightening
connecting nut to prevent fitting from turning.

2. Change ferrules with every tube change. Ferrules are the
seal between tube fitting and the connecting nut.

Tube fittings pulling out of the tube

• Pulling excessively on the tube fitting when installing a
replacement tube. Allow rollers to stretch tube into
position and follow tube replacement instructions.

• Pre-stretching the tube before replacement.

NOTE Additional information

Due to wear, the used tube will have stretched and
will be longer than the new tube.

Normal tube failures

• Pin hole at discharge side; tube will leak.

• Breakage at the suction side.

21

• Fatigued, no longer completely compresses, no rupture
evident, doesn’t pump.

The above conditions are usually indications that the tube has
reached the end of its service life. If all other conditions/wear
have been checked and corrected, determine maintenance
schedule.

NOTE Additional information

Tube fitting flange cracks are normal on the
discharge tube fitting. They do not indicate a
failure or defect.

Continued...

22 Maintenance Basics – Tube

Other tube failures

Corrective Action

• Using pump components not provided by Stenner can
cause pump to malfunction.

• Chemical incompatibility: petroleum and oil-based products
not compatible with Santoprene

®

tube material.

• Storage of tubes in high ambient temperatures and long­term exposure from direct sunlight.

• Overpressure due to crushed/over tightened duckbill.

Use only Stenner accessories with Stenner pumps.

1.

2. Check the chemical resistance chart for chemical

compatibility or call the factory.

3.Do not store tubes in pump r

ooms or in direct sunlight.

4. Do NOT lubricate the pump tube or roller assembly.

Points to Be
Greased

BEST PRACTICE

Factory recommended

Every time pump is serviced or a tube is replaced,
apply gr
cover bushing and main shaft ONLY.

ease (AquaShield

®

) to the pump head

Tube Replacement and Centering

BEST PRACTICE

Factory recommended

Prior to tube removal, pump water
through tube to remove chemical.

Removing the Old Pump Tube

1. Turn pump off.

2. Remove screws and then the cover by lifting the side

opposite the tube fittings.

23

3. Set the feed rate dial on a low setting and leave on this

setting until finished.

4. Turn the pump on and let it run until one of the three slots

in the roller assembly lines up with the bottom tube fitting
(suction side).

Continued...

24 Maintenance Basics – Tube

5. Turn pump off.

6. Without moving the roller assembly further, lift the tube

fitting out of the housing slot and pull it toward the center
of the roller.

7. Turn pump on and allow roller assembly to jog while guiding

the tube with tension up and out of the housing.

8. Turn the pump off. Completely remove the tube assembly.

After Removing Old Tube

25

IMPORTANT!

Key for optimum performance

Identify the cause of tube failure
prior to installing a new tube.

1. Remove roller assembly, shaft, and housing.

2. Use Fantastik®or similar (non-citrus) all purpose cleaner

to clean all chemical residue from pump head housing, roller
assembly, and cover.

3. Check housing for cracks and replace if cracked.

4. Ensure rollers turn freely.

5. Check rollers for excessive side play from bore wear.

Replace roller assembly if worn.

Continued...

26 Maintenance Basics – Tube

6. Inspect the suction/discharge tubing, point of injection,

7. Install clean housing.

8. Install and grease shaft.

9. Install roller assembly.

Installing the New Pump Tube

1. Manually turn roller assembly (counterclockwise) to line up

IMPORTANT!

Key for optimum performance

Do not lubricate pump tube
or roller assembly.

2. Place the tube fitting into the housing and roller

and check valve duckbill for blockages. Clean and/or replace
as required.

its slot with the tube housing slot.

assembly slot.

3. Turn dial ring to L setting.

• While holding the threaded tube fitting, turn the pump on
and allow it to jog the roller assembly.

• Guide the tube with slight tension (toward the center)
to prevent pinching between the housing and roller
assembly

.

27

IMPORTANT!

Key for optimum performance

Avoid rotating wrist, which
can result in a twisted tube
that will not center. Do not
force the tube and be careful
of your fingers.

4. When the tube reaches the top housing slot, turn pump off.

• Turn dial ring to 10, hold tube fitting firmly, and turn
pump on.

• Allow rollers to stretch tube into place while guiding the
tube into the slot.

5. Turn the pump off.

NOTE Additional information

A used tube will stretch
approximately 3/4 of an inch
over its life.

appear to be stiff and short.
Follow directions to allow
rollers to str
place.

The new tube will

etch tube into

Continued...

28 Maintenance Basics – Tube

6. Grease (AquaShield®) the cover bushing ONLY and replace

NOTE Additional information

If pump head housing screws
are stripped, use alternate
bosses and position them
opposite each other. Use
only two at a time.

the cover and the screws, leaving the front screw in­between the fittings loose enough to rotate the tube
fitting, in order to center tube on rollers.

Centering the Pump Tube

1. To center the pump tube on the rollers, set the Feed Rate

dial to a setting of 10. Turn pump on.

2. Turn the IN (suction) tube fitting located on the bottom of

the pump head not more than 1/8 of a turn in the direction
the tube must move.

3. Do not let go of fitting until the tube rides approximately

in the center of the rollers.

4. Turn the pump off, let go of fitting, and tighten the cover

screws. The cover is not on securely if there is a gap
between the screw boss and the cover.

29

BEST PRACTICE

Factory recommended

Trim 1" off suction/discharge
tubing before installing
ferrules. Replace ferrules
with ev

ery tube change.

Fixed Rate Pump Tube Change

To install a new tube in a fixed rate pump, utilize the
on/off switch to jog the roller assembly in absence of the
feed rate control.

30

Section V Maintenance Basics –

Feed Rate Control

Feed Rate Control (FRC) How it works

The feed rate control adjusts the output by utilizing a
cam/lifter system to control the rotation of the roller
assembly according to the setting on the dial ring.

Inside the FRC is a brass spider and index pin assembly that
consists of a pin (with carbide tip) and a spring inside the
holder attached to a lifter.

When the pump is on, the index spider assembly rotates.
When the lifter drops into the FRC channel, the pin engages
an index plate hole. The roller assembly rotates, creating the
pumping action.

When the lifter rides on the cam, the pin is lifted inside the
holder. The roller assembly does not rotate, resulting in no
pumping action.

NOTE Additional information

Pin retracts when lifted.

Feed Rate Wear Definition

Indication of wear is apparent when the feed rate control
makes a skipping or ratcheting sound. The pump output is less
than the desired setting.

Feed Rate Wear Causes

Worn index plate (wear part)

If there is a groove in the cam and/or the lifter point has
a flat spot, the lifter cannot raise the index pin high enough
inside the holder. The pin will drag across the index plate and
accelerate the wear by elongating the plate holes. The pin can
no longer engage in the holes.

31

Groove in cam (wear part)

The lifter riding on the cam causes a gr

oove in the cam.

Continued...

32 Maintenance Basics – FRC

Worn lifter (wear part)

Continuous repetition of the lifter riding on the cam can cause
a flat spot on the r
contributes to the pr

ounded point of the lifter. The flat spot

emature wear of the cam and index plate.

BEST PRACTICE

Factory recommended

Mount pump in vertical
position with spill recovery
tube to allow chemicals to
drain away from
internal parts.

A seized or corroded index pin and lif

Usually caused by water or chemical intrusion.

ter assembly

NOTE Additional information

The lower the feed rate control setting, the more
wear on the cam, lifter, and plate. To reduce FRC
parts wear, select the pump model that will
operate at the desired maximum gpd.

Feed Rate Parts Replacement

1. Remove screws.

2. Remove feed rate mounting plate and dial ring.

3. Remove cam, spider assembly, and index plate.

• If required, remove index pin assembly by unscrewing with
box wrench and replace.

33

4. Flip worn index plate over OR install new index plate.

5. Clean out FRC channel before installing new cam.

6. Use grease (AquaShield®) to lubricate the cam’s angled tip.

7. Install the cam.

8. Feed the angled tip into the FRC channel and keep the

90° end in the up position. Place thumb over the
cam to guide as it is inserted in the channel.

9. Continue to feed the cam in the channel until there is
approximately a 1/2" gap between the cam tip and the
beginning of the channel

.

Continued...

Installing
New Cam

34 Maintenance Basics – FRC

NOTE Additional information

Spread AquaShield®on bottom
step of ring.

10.

Place dial ring boss onto the cam’s 90° end.

BEST PRACTICE

Factory recommended

11. While keeping the 90° end in the boss and the cam in the

FRC channel, in a clockwise motion, place the dial ring onto
the FRC housing and snap into place.

12. Generously grease (AquaShield®) bottom of FRC housing

before placing index plate inside. Grease the top of the
index plate.

13. Place the spider with index pin assembly on the index plate.

The lifter tip should be positioned in the 1/2" gap in the
FRC channel.

Add grease (AquaShield®)
to dial ring for easier
turning.

14. To secure mounting plate, align its arrow with the FRC
housing arrow and install the three screws.

35

IMPORTANT!

Key for optimum performance

If the dial ring does not
rotate from L to 10, the
FRC mounting plate is in
the wr

ong orienta

tion.

NOTE Additional information

The dial ring will be stiff or difficult to rotate if it
lacks lubrication (AquaShield®) or the screws are
over tightened. If the screws are too loose, the dial
ring can inadvertently be turned to 10 by the motor.

36 Maintenance Basics – FRC

Feed Rate Control Manufactured before 2002

NOTE Additional information

An arrow doesn’t exist on
older feed rate control
mounting plates. Place the
plate so the “bump” is to
the left of the two adjacent
holes that are in between
two scr
screw holes on the mounting
plate and feed rate control
and the mounting plate will
be re-installed at the proper
orientation.

ew bosses. Align the

Section VI Maintenance Basics – Motor

Gear Case How it works

The metal reduction gear and phenolic gear control the rpm of
the feed rate and pumping head. The 45 series is 26 rpm and
the 85 series is 44 rpm. The motor shaft with gear drives the
feed rate control.

37

45 Series

3/8" 9/16"1 3/8" 1 1/4"

85 Series

Continued...

38 Maintenance Basics – Motor

Gear Case Wear Definition

Gear failure, in general, can be caused by misalignment (mainly
due to wear), water or chemical intrusion inside the gear case,
insufficient tooth engagement, or wear and/or damage to
other components.

BEST PRACTICE

Factory recommended

Apply generous amounts
of grease (AquaShield
to gear posts, gear rings,
pinions, and master shaft
when doing service in the
gear case.

®

)

Gear Case Parts Replacement

1. Replace gears that show visible wear or corrosion.

2. Replace gear posts that are worn, rusted, or corroded.

• To remove gear posts, grasp with pliers and pull
straight out.

• To install gear posts, insert in hole and
press until bottomed.

• Inspect gear case and cover for cracks and
cup bearing for corrosion. Replace as needed.

Motor How it works

A cylindrical rotor with shaft is encased within a magnetic
coil. When power is applied to the coil, the rotor rotates. The
rotor’s directional rotation is determined by the orientation of
the copper shaded poles on the coil. The helical end of the
rotor engages the series of gears in the gearbox.

39

BEST PRACTICE

Factory recommended

Motor Failure Definition

Power is applied to the motor and the rotor fails to rotate.

Motor Failure Causes

Water intrusion

Allow ventilation to the fan-cooled motor while protecting
against water intrusion.

Chemical vapors

Can corr
the motor’s inability to rotate freely.

Burned motor coil

Motor voltage must match pow

ode or rust the coil, rotor, and bearings resulting in

er supply

. Use volt meter to confirm.

Avoid mounting pumps over
an open chemical solution
tank. Proper ventilation will
extend motor life. Use a
Stenner Rain Roof for
outdoor installations or in
a moist environment.

Damaged bearing brackets

Cracked or broken bearing brackets result in rotor misalignment,
which causes the rotor to bind to the magnetic coil causing a
humming sound.

40 Maintenance Basics – Motor

Rotor Assembly Replacement

D

A

C

B

E

1. Remove and set aside:

ews

• two motor housing scr

(not shown)

• motor housing (not shown)

• plastic fan A (discard old fan)

• two coil screws and lock washers

B

• coil (keep wires connected) D

2.

Remove and discard the rotor E and two plastic
brackets C.

3. Press the new plastic bearing bracket onto the threaded

brass inserts in the front of the motor case.

C

4. Install new r

otor assembly by inserting the shaft (helical

gear side) onto the gear case.

5. Place the coil ov

er the rotor and keep the copper-shaded

poles on the right-hand side (same side as the on/off switch).

6. Snap into place the second plastic bearing bracket on

the rotor.

7. Insert two self-tapping screws (w/lock washers).

8. Starting at an angle, pr

ess fan (with hub side down) onto

the rotor shaft.

9. Reinstall two motor housing screws and tighten the

self-tapping screws to secure the motor housing cover.

Coil Replacement

1. Disconnect power to pump.

2. Remove the feed rate control with the pump head attached

and set on a flat surface to be used as a stand for the
motor case.

41

3. Remove two motor cover screws and invert the motor by

inserting the gear case shaft into the feed rate control.

4. Remove fan and set aside.

Continued...

42 Maintenance Basics – Motor

5. Disconnect ground wire (with eyelet) and set screw aside.

6. Cut the power cord and coil lead wires from motor cover at

the wire nut (four cuts total). Set cover to the side.

7. Remove and set aside

• Two coil screws and washers from the r

otor bracket

• Plastic bearing bracket (amber)

8. Remove coil and discard.

9. Install new coil over rotor on the remaining amber

bracket. The correct orientation is with two copper
rods in the upper right corner and the vent opening at
the bottom of the motor housing. Place bracket back
on the rotor and securely seat into new coil. Install
screws and washers and fasten bracket to coil.

10. With the metal band facing the bracket, press fan

flush on rotor shaft.

General Information 43

11.

With wir

e strippers set at 16 gauge
1/2" from the power cord and on/off switch lead wires in the
motor housing.

12. Secure gr

ound wire (with eyelet) to motor coil.

, strip approximately

Continued...

44 Maintenance Basics – Motor

13. Crimp the stripped lead wires to each of the new coil

lead wires.

14. Tuck wire nuts into bottom of motor cover and secure cover

back in place. (Befor

e tightening, reverse cover screws to

catch original threads.)

15. Apply power to motor and test.

16. Reconnect subassembly(s).

Section VII Quick Tips

Three Basic Subassemblies

45

• Use subassemblies in field for quick replacement.
Repair and refurbish parts at shop.

• Use Stenner Tank System for quick installation.

• Establish “application specific” maintenance schedule.

• Install parts poster in shop for quick part reference.

• Use UV black suction/discharge tubing, rain roof, and
UV gray tanks for outdoor applications.

• Contact factory for help: 800.683.2378 or 904.641.1666.

• Visit our w

ebsite at www

.stenner.com.

46 Notes

tic Metering Pumps

eristal

P

Since 1957

CSM

.stenner

www

Phone:

904.641.1666

.com

US Toll Free: 800.683.2378
Fax: [phone]

Hours of Operation (EST):
Monday

7 am - 5 pm

Tues.-Fri. 7 am - 5:30 pm

3174 DeSalvo Road
Jacksonville, Florida 32246
sales@stenner

©

Stenner Pump Company

.com

All Rights Reserved

Illustrations by David Stiles
www.stilesdesigns.com