Model 219 Mix Pump
OWNER’S MANUAL
Manual No. 1134067-4 Dec., 2005
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STOELTING OWNER'S MANUAL
FOR MODEL 219
STOELTING MIX PUMP HOPPER OR
REMOTE INSTALLATIONS
This manual provides basic information about the hopper and remote installed mix pump and its
components. Instructions and suggestions are given covering its operation and care.
The illustrations and specifications are not binding in detail. We reserve the right to make changes
at any time without notice to the mix pump or components without incurring any obligation to equip
same on mix pump built prior to date of change.
DO NOT ATTEMPT to operate the mix pump until instructions and safety precautions in this manual
are read completely and are thoroughly understood. The mix pump should be operated only by
qualified personnel. If problems develop or questions arise in connection with installation, operation
or servicing of the mix pump, contact your local distributor or the company at the following location:
Stoelting, LLC Tele: 920-894-2293
502 Hwy. 67
Kiel, WI 53042-1600 Fax: 920-894-7029
TABLE OF CONTENTS
Section Description Page
1 INTRODUCTION .................................................................................................. 1
1.1 Description ........................................................................................................... 1
1.2 Specifications ....................................................................................................... 1
2 INSTALLATION INSTRUCTIONS ........................................................................ 3
2.1 Shipment and Transit (Remote Models) ................................................................3
2.2 National Sanitation Foundation Compliance
Requirements (Remote Pump).............................................................................. 3
2.3 Installation (Remote Models) ................................................................................ 4
2.4 Mix Pump Check Out ........................................................................................... 4
3 OPERATING INSTRUCTIONS ............................................................................. 5
3.1 Safety Precautions ............................................................................................... 5
3.2 Pump Motor Switch .............................................................................................. 5
3.3 Sanitizing Procedures .......................................................................................... 6
3.4 Operation of Mix Pump ......................................................................................... 6
3.5 Cleaning ............................................................................................................... 7
3.6 Disassembly of Mix Pump .................................................................................... 8
3.7 Assembly of Mix Pump ........................................................................................10
3.8 “O” Ring Removal and Care ..................................................................................11
4 MAINTENANCE INSTRUCTIONS ........................................................................13
4.1 Over-Run Adjustment ............................................................................................ 13
4.2 Pressure Control Switch ....................................................................................... 14
4.3 Preventive Maintenance ........................................................................................14
5 TROUBLESHOOTING .......................................................................................... 17
5.1 Pump Motor Does Not Run................................................................................... 17
5.2 Pump Operates But Cylinder Will Not Fill .............................................................17
5.3 Low Over-Run .......................................................................................................17
6 REPLACEMENT PARTS INFORMATION ............................................................ 19
6.1 How To Order Replacement Parts ........................................................................ 19
6.2 Parts List & Reference Drawings .......................................................................... 19
6.3 Hopper Pump Final Assembly .............................................................................. 20
6.4 Mix Pump Parts ...................................................................................................22
6.5 Remote Pump Final Assembly .............................................................................23
6.6 Pump Drive Assembly ..........................................................................................25
WARRANTY
LIST OF ILLUSTRA TIONS
Figure Description Page
1 Model 219-02 Mix Pump.................................................................................................... 1
2 Refrigerated Mix Transfer Line ........................................................................................... 3
3 Pump Controls ..................................................................................................................5
4 Pump Operation ................................................................................................................ 7
5 Pump Assembly Removal.................................................................................................. 8
6 Manifold Disassembly ....................................................................................................... 8
7 Pump Disassembly Step One ........................................................................................... 9
8 Pump Disassembly Step Two ............................................................................................ 9
9 Pump Disassembly Step Three ......................................................................................... 9
10 Pump Disassembly Step Four ........................................................................................... 9
11 Mix Pump Assembly ......................................................................................................... 10
12 Removing “O” Rings ........................................................................................................... 11
13 “O”- Ring Identification ....................................................................................................... 12
14 Over-Run Adjustment ......................................................................................................... 13
15 Pressure Gauge ................................................................................................................ 14
16 Hopper Pump Final Assembly ........................................................................................... 20
17 Mix Pump Parts ................................................................................................................ 21
18 Remote Pump Final Assembly .......................................................................................... 23
19 Pump Drive Assembly ....................................................................................................... 24
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Model 219 Stoelting® Mix Pump, is a high capacity
pump that will pump 45 gallons of mix per hour. The pump
is easy to clean, assemble, and operate. The pump
features a built-in pressure relief valve to prevent excessive
pressure build up in the freezer cylinder and mix lines.
The same pump (with minor variations) is used for both
hopper or remote model freezers. The instructions in this
manual will apply to both the hopper and remote types.
1.2 SPECIFICATIONS
DIMENSIONS
Height 13” (33 cm)
Width 9” (22.86 cm)
Length 13-1/2” (34.29 cm)
WEIGHT
22 lbs. (9.98 kg)
ELECTRICAL (Remote)
115v, 60 Hz: @ .74 Amps
(220V, 50 Hz is available)
TUBING SIZE REQUIRED (Remote)
1/2” (1.27 cm) I.D.
3/4” (1.90 cm) I.D.
Figure 1. Model 219-02 Mix Pump
1
2
SECTION 2
INTRODUCTION
2.1 SHIPMENT AND TRUST (REMOTE
MODELS)
The mix pump has been completely assembled, operated
and inspected at the factory. Upon arrival at the final
destination, the mix pump must be checked for any
damage that may have occurred during transit.
The mix pump should arrive in satisfactory condition.
THE CARRIER IS RESPONSIBLE FOR ALL DAMAGE
IN TRANSIT, WHETHER VISIBLE OR CONCEALED.
Do not pay the freight bill until you have checked the
equipment. Have the carrier note any visible damage
on the freight bill. If concealed damage and/or shortage
is found later, advise the carrier inspector within 10
days and request inspection. The customer must place
claim for damages and/or shortages in shipment with
the carrier. Stoelting, Inc. cannot make any claims
against the carrier.
2.2 NATIONAL SANITATION
FOUNDATION COMPLIANCE
REQ’S (REMOTE PUMP)
In order to comply with “National Sanitation Testing
Laboratory, Inc.” (NSF) code #6:
A. This unit (remote pump) must be installed with
a “NSF” listed refrigerated mix transfer line.
The mix transfer line must be pitched to cooler,
with no sags or low points, to allow complete
drainage. (See fig. 2.)
B. The product at the mix pump and in transfer line
must be maintained below 45°F (7.22°C)
Figure 2. Refrigerated Mix Transfer Line
3
2.3 INSTALLATION
2.4 MIX PUMP CHECK OUT
Typical Remote Pump Installation
The hopper mix pump is completely installed on the
freezer. The remote mix pump is designed for mounting
in a walk-in cooler. Select a location that is close to the
soft serve freezer and a grounded 115 volt (220 volt if
50 hertz) receptacle. The mix pump should not be
located near heavy traffic or in a congested area. Refer
to Figure 2 and the following steps:
REMOTE MODELS INSTALLATION
A. Install the mix pump in an upright position on the
wall. Allow clearance for a mix can under pump.
Mount by bolting bracket to wall using 1/4 inch
(64cm) diameter lag bolts of sufficient length to hold
securely.
B. Connect 5/8 inch (1.60 cm) I.D. plastic food grade
tubing between pump cylinder (inlet) and mix
container.
C. Connect 1/2 inch (1.27 cm) plastic food grade tubing
between pump body mix transfer tube (outlet) and
refrigerated mix transfer line. Secure with No. 26
hose clamp or equivalent.
The mix pump has been thoroughly cleaned and properly
lubricated at the factory. Before using, the mix pump
should be disassembled. This is necessary to remove
any foreign materials and to familiarize operators with
the correct assembly procedures.
A. The over-run adjustment is preset at the factory. If
an adjustment becomes necessary, refer to Section
4.1.
B. The pump pressure is preset at the factory. If an
adjustment becomes necessary, refer to Section 4.2.
C. On remote pumps, check for air leaks by placing
the suction line into three gallons of cold water. Place
the freezer switches in the OFF position. Close the
spigot and freezer air vents. Place mix pump switch
in the ON position and allow the system pressure to
build up and pump to shut OFF automatically. Leave
pump on for ten minutes. During this time do not
open spigot or freezer air vent s. If pump does not
automatically start again during this period, the
system is free of leaks. If the pump does start, there
is a leak in the system. Locate leak by applying a
liquid detergent or bubbles solution with a small
brush to all tubing connections and “O”-ring seals.
Correct as required.
D. Connect 1/2 inch (1.27 cm) plastic food grade tubing
between safety relief fitting to a separate pail or shot
can.
NOTE
This line allows mix to escape if the system
pressure should exceed 30 P.S.I.
E. Plug mix pump into a 115 volt grounded receptacle.
(Customer must provide plug for 220 volt, 50 hertz
remote pump.)
WARNING
TO MINIMIZE SHOCK HAZARD, THE REMOTE
MIX PUMP MUST BE PLUGGED INT O A
PROPERLY GROUNDED ELECTRICAL
RECEPTACLE WITHOUT THE USE OF A
GROUND ADAPTER PLUG.
4
SECTION 3
OPERATION INSTRUCTIONS
3.1 SAFETY PRECAUTIONS
Do not attempt to operate the mix pump until the safety
precautions and operating instructions in the manual are
read completely and thoroughly understood.
Take notice of all warning labels on the mix pump. The
labels have been put there to help in maintaining a safe
working environment. The labels are designed to withstand
washing and cleaning. All labels must remain legible for
the life of the mix pump. Labels should be checked
periodically to be sure they have not been removed,
painted over, rubbed off, and can be recognized as
warning labels.
If replacement labels are needed, indicate the part
number, type of label, location of label, and quantity
required. Mail your name and address to:
F. Do not attempt to repair or perform maintenance on
the mix pump until the main electrical power has been
disconnected.
G. Do not operate the mix pump if unusual or excessive
noise or vibration occurs.
3.2 PUMP MOTOR SWITCH
The PUMP MOTOR switch (see Fig. 3) is located on the
mix pump assembly. When the pump motor switch is
placed in the ON position, the mix pump motor will be
actuated to pump mix into the freezer cylinder. When the
set pressure is reached, the mix pump will shut off
automatically. When the pump motor switch is placed in
the OFF position. The mix pump will be inoperative.
STOELTING, LLC
ATTENTION: CPG Customer Service
P.O. Box 127
Kiel, Wisconsin 53042-0127
Labels will be furnished and mailed at no charge.
SAFE OPERATION IS NO ACCIDENT; Observe these
rules:
A. Know the mix pump- read and understand the Owner’s
Manual.
B. Wear proper clothing - avoid loose fitting garments,
and remove watches, rings or jewelry which could
cause a serious accident.
C. Maintain a clean work area – avoid tripping or slipping
by cleaning up the area and keeping it clean.
The mix pump motor is equipped with an overload push
button reset switch (labeled “Drive Reset”) that will “kickout” when the motor is overloaded. Motor overloads can
be caused by several things including improper assembly
of the pump or worn parts causing binding, or electrical
probems. Pressing the reset button will return the motor
to normal operation if the overload condition is no longer
present. If the If the pump assembly seems to move freely
but the overload condition continues, contact a qualified
service person.
D. Stay alert at all times – know which switch, push
button or control you are about to use and what effect
it is going to have.
E. Turn all switches to OFF prior to making any
adjustments.
Figure 3. Pump Controls
5
3.3 SANITIZING PROCEDURES
For sanitizing to be effective, it must be performed after
the mix pump and freezer parts have been cleaned, and
just prior to filling the hopper or storage container with
mix. Sanitizing the night before is not effective.
E. Place the freezer in the CLEAN mode (no
refrigeration).
F. After five minutes, open spigot to expel sanitizing
solution.
To sanitize, refer to local sanitary regulations for applicable
codes and recommended disinfecting products and
procedures. The frequency of cleaning must comply with
local health regulations. Use a solution containing 100
PPM of free available chlorine. Use “Stera-Sheen Green
Label Sanitizer and Cleaner”, or others in accordance
with Health Inspection Requirements.
NOTE
Stoelting, Inc. has found that STERA-SHEEN
GREEN LABEL SANITIZER AND CLEANER does
an effective job of properly sanitizing and cleaning
a soft serve freezer. We therefore include a sample
with each new freezer. For further information read
the directions on the packet. Other products may
be effective.
CAUTION
PROLONGED CONTACT OF SANITIZER WITH
FREEZER MAY CAUSE CORROSION OF
STAINLESS STEEL PARTS.
G. Close the spigot and place the mix pump and freezer
switches in the OFF position.
The mix pump, connecting hoses and freezer are clean,
sanitized and ready for adding mix.
NOTE
Do not use brushes to clean hoses. Brushes can
cause scratches to interior of mix hose resulting
in areas that will harbor bacteria.
3.4 OPERATION OF MIX PUMP
This section describes the operation of the mix pump.
(See Fig. 4)
NOTE
The safety guard must be in place before the mix
pump will operate.
In general, sanitizing may be conducted as follows:
A. Prepare three gallons (11 liters) of sanitizing solution
following manufacturer’s instructions, and pour into
hopper (hopper models) or place pump suction
(inlet) line into solution (remote models).
B. Place the mix pump switch in the ON position. Allow
freezer to fill until pump stops.
C. Check for leaks when the freezer barrel is first
pressurized with sanitizing solution.
D. Clean the following parts using a sanitized soft bristle
brush or equivalent, dipped in sanitizing solution. On
remote models, clean exterior of pump and sides of
mix container. On hopper models, clean exterior of
pump, sides and under cover of hopper.
A. Sanitize just prior to use according to instructions in
Section 3.3.
B. Refer to freezer instruction manual for the operation
of the freezer.
C. Mix Operation:
1. Mix will enter pump thru mix inlet valve (A) on
position UP stroke.
2. On piston DOWN stroke, mix inlet (A) is forced
shut and mix is moved out thru mix outlet valve
(B) into the freezing chamber.
D. Air Operation:
1. Air enters pump thru air inlet check valve (C)
on piston DOWN stroke.
6
2. On piston UP stroke, air inlet check valve (C) is
forced shut and air is moved out of air outlet
valve (D) into mix transfer tube bottom (F) and
into the freezing chamber.
E. Relief Valve Operation:
1. The relief valve (E) opens and releases pressure
if the pressure switch fails to shut off the pump
motor.
TO
PRESSURE
SWITCH
3.5 CLEANING
The mix pump must be cleaned when changing mix or
whenever the freezer is shut off for an extended period,
such as overnight or on nonbusiness days. For sanitary
reasons, mix must not be allowed to remain in the freezer
lines or mix pump when the freezer is not in operation.
NOTE
Refer to the freezer manual for freezer cleaning
procedures.
A. On remote models, remove suction tubing from the
mix container. Draw off all or most of the mix remaining
in the freezer barrel.
CYLINDER
TOP
QUAD
RING
CYLINDER
“O” RING
SEAT
AIR
INLET
MIX
TRANSFER
TUBE TOP
B. Pump 3 gallons (11 liters) of cold potable water thru
freezer until water at spigot is free of mix.
C. Pump 3 gallons (11 liters) of warm detergent solution
water thru freezer . The use of sof t water is
recommended along with dishwashing detergents
such as “Joy”, “Dawn”, or equivalent.
D. Place mix pump switch in OFF position.
E. Disassemble pump parts. (See Section 3.6.) Then
place all parts in warm, mild detergent water and wash
thoroughly using brushes provided. Again, the use of
soft water is recommended along with dishwashing
detergents such as “Joy”, “Dawn”, or equivalent. Rinse
all parts with clean hot water.
NOTE
If the mix lines or air lines are difficult to remove,
soften with hot water or a rag soaked in hot water.
Hose connections may be sprayed with Haynes
Sanitary Lubricant for ease of removal.
AIR
MIX
AIR & MIX
MIX
INLET
Figure 4. Pump Operation
AIR & MIX
OUTLET
F. Use a sanitizing solution of 100 parts per million to
sanitize the parts before assembly. Use “Stera-Sheen
Green Label Sanitizer and Cleaner”, or others in
accordance with Health Inspection Requirements.
G. Place all parts in the sanitizing solution for 5 minutes,
then remove and let air dry.
7
CLEANING MIX LINES
The mix lines must be cleaned and sanitized whenever
changing mix or whenever the freezer is off for an
extended period of time – such as overnight, or nonbusiness
days. The mix lines are sufficiently cleaned and sanitized
when cleaning and sanitizing the pump and freezer as an
assembly.
Once every 2 weeks, if required, perform the following
steps:
A. Mix 2 gallons of milkstone remover solution according
to the directions on the container and pump through
the mix line.
B. Cut a piece of sponge slightly larger than the inside
diameter of the mix line. Place the sponge inside the
mix line and force through with tap water pressure. A
garden hose repair end clamped to the mix line works
well for this purpose.
3.6 DISASSEMBLY OF MIX PUMP
HOPPER MODEL: Remove liquid level indicator .
Remove the two wing nuts from the pressure switch
manifold retainer and remove the manifold (both
models).
C. Remove large hand nut (1), washers (2) and rear
hopper cover (3). (See Fig. 5)
SUCTION CUP
1
1
2
2
3
LEVEL
INDICATOR
CYLINDER
TOP
1
REMOTE
MODEL
Refer to your Owner’s Manual for detailed instructions on
proper freezer operation.
WARNING
THE MIX PUMP SWITCH MUST BE IN THE OFF
POSITION WHEN SERVICING OR CLEANING
PUMP.
A. Drain freezer according to freezer owner’s manual.
CAUTION
NEVER DISCONNECT HOSES FROM FREEZER
OR PUMP WITHOUT FIRST OPENING SPIGOT
TO RELIEVE PRESSURE.
B. REMOTE MODEL: Loosen hose clamps and remove
tubing from pressure relief valve. Remove suction
tubing from pump and mix bag. Remove discharge
tubing from bottom of pump. Remove drive pin by
pulling straight out.
Figure 5. Pump Assembly Removal
D. Remove quick connect (4) from manifold (5). Remove
two wing nuts (6), locking plate washer (7), and
manifold (5). Remove manifold connector O-ring (8)
from manifold (5), and manifold “O”-ring (9). Loosen
hose clamp (10) and remove hose (11). (See Fig.
6)
E. Remove two small hand nut(s) (12) and top lock plate
(13) from clamp rod (14). (See Fig. 7)
9
5
8
4
10
11
7
6
Figure 6. Manifold Disassembly
8
12
13
17
18
19
20
24
26
14
Figure 7. Pump Disassembly Step One
F. Separate mix transfer tube (15) from cylinder (16).
(See Fig. 8)
15
16
22
21
Figure 9. Pump Disassembly Step Three
H. Remove two cylinder “O”-rings (27) from cylinder
body (28). Remove air inlet retainer (29) and air
inlet check valve (30) from cylinder top (31). Remove
cylinder top (31) from cylinder body (28), remove
“O”-ring (32) and piston quad ring (33) from cylinder
top (31). Remove piston shaft (34), and “O”-ring (35)
from piston shaft (34). Remove mix inlet valve (36)
from cylinder body (28), and remove “O”-ring (37)
from mix inlet valve (36). (See Fig. 10)
29
25
23
30
31
32
Figure 8. Pump Disassembly Step Two
G. Remove safety valve retainer (17), valve retainer “O”-
ring (18), spring (19) and safety valve (20). Remove
two air mix outlet valves (21) and two air mix outlet
springs (22). Remove mix transfer tube “O”-ring (23).
Separate air transfer tube top (24) from mix transfer
tube bottom (25). Remove cylinder “O”-ring (26).
(See Fig. 9)
33
34
35
12
37
28
Figure 10. Pump Disassembly Step
Four
9
36
27
12
3.7 ASSEMBLY OF MIX PUMP
CAUTION
DO NOT FORCE PARTS, THEY FIT TOGETHER
EASILY WHEN PROPERLY INSTALLED.
Haynes sanitary lubricant or liquid equivalent must be
used to lubricate all “O”-rings, piston shaft and bore of
cylinder body.
29
30
31
GOOD
32
33
34
A. Place manifold “O”-ring (9) onto manifold (5) and
lubricate lightly. Place manifolds connector “O”-ring
(8) onto manifold (5) and lubricate. Place manifold
(5) into pressure switch. Position locking plate washer
(7) and secure with two wing nuts (6) finger tight.
Connect tubing (11) to quick connect (4) and tighten
hose clamp (10) finger tight. Connect quick connect
(4) to manifold (5). (See Fig. 6)
B. Install air inlet check valve (30) into cylinder top (31).
Do not lubricate. Install air inlet retainer (29) into air
inlet valve. Push into place. Check quad ring (33) for
excessive wear and replace if necessary . Spray a
thin film of lubricant in bottom of cylinder top (31).
NOTE
Quad ring must not be twisted.
Install quad ring (33) and rotate one full turn to improve
sealing. Place “O”-ring (35) onto piston shaft (34) and
“O”-ring (32) onto cylinder top (31). Spray a thin film
of lubricant onto the two “O”-rings, piston shaft and
cylinder walls. Position cylinder top (31) over piston
shaft (34). Place “O”-ring (37) onto mix inlet valve (36)
and insert inlet valve (36) into cylinder (28). Assemble
cylinder top (31) and piston (34) into cylinder (28)
and push piston fully down.
REPLACE
35
36
37
27
28
Figure 11. Mix Pump Assembly
C. Place “O”-ring (26) onto mix transfer tube bottom (25)
and lubricate. Place mix transfer tube bottom (25)
into air transfer tube top (24). (See Fig. 9)
On hopper models: place mix transfer tube “O”-ring
(23) onto bottom of mix transfer tube (25) and lubricate
lightly. Position small end of two air/mix outlet springs
(22) onto two air/mix outlet valves (21) and insert
into mix transfer tube. Place valve retainer “O”-ring
(18) onto valve retainer (17). Insert safety valve (20),
spring (19) and valve retainer (17) into top hole of
mix transfer tube. (See Fig. 9)
D. Holding valve retainer firmly in place with thumb and
forefingers, join mix transfer tube (15) to pump cylinder
(16) as shown. (See Fig. 8)
10
E. Place top lock plate (13) and clamp rod (14) over
end of pump cylinder and mix transfer tube. Secure
with two hand nuts (12) and finger tighten.
(See Fig. 7)
lubricant on hose ends prior to installing tubing. Install
tubing onto pressure relief valve connection.
NOTE
IMPORTANT- Refer to paragraph 3.3 Sanitizing
Procedure prior to filling with mix.
F. On hopper models: position hopper rear cover over
assembled pump body. Assemble washer (2) and
large hand nut (1) onto top lock plate (3). Do not tighten
at this time. Place pump body with hopper cover into
hopper. Tilt pump forward and push toward rear of
hopper until discharge end of pump body engages
hopper outlet hole. Guide hopper rear cover under
pump drive bracket at the same time. Install suction
cup over pressure tube and connect tubing and tighten
hose clamp finger tight. Assemble liquid level indicator
by first installing “O”-ring into indicator cover and
lubricating lightly. Slide red float into adapter and install
indicator cover onto adapter. Place indicator into rear
hopper cover. (See Fig. 5)
On hopper and remote models: place pump body
under drive bracket. Slip top lock plate threaded shaft
into slot in pump drive bracket. Align top hole in piston
shaft with holes in drive clevis. Use drive pin to aid in
lifting and aligning piston shaft. When top hole in
piston shaft is aligned with hole in piston drive, insert
drive pin. Secure large hand nut (1) as tight as possible
with fingers. Install safety guard over pump drive and
secure with two black knobs. Interlock hopper front
cover with hopper rear cover. (See Fig. 5)
NOTE
The safety guard must be in place before mix
pump will operate.
3.8 O-RING REMOVAL AND CARE
Worn or damaged “O”-and “Quad” ring seals must be
replaced to ensure proper freezer operation. To prevent
undue damage to these seals, at least once a week be
sure to apply lubricant where required and avoid twisting
“O”-rings during assembly. Worn or damaged “O”-rings or
“O”-rings which are twisted after assembly will cause air
and/or mix leakage. Leaks will result in a low over-run
product.
To remove “O”-rings from parts for cleaning or servicing,
follow the steps below:
A. Remove all sanitary lubricant from “O”-ring using a
clean paper towel.
On remote models: install tubing onto suction and
discharge connections on bottom of pump and pump
body. Tighten hose clamp. For ease of removal, use
Figure 12. Removing “O”-Rings
B. Remove “O”-ring by squeezing upward as shown in
Figure 12. When a loop is formed, roll the “O”-ring
out of the “O”-ring groove.
CAUTION
DO NOT USE ANY TYPE OF SHARP OBJECT
TO REMOVE “O”-RING.
11
Mix Inlet
Valve and Mix
Outlet Valve
(#624556-5)
Mix Transfer
Tube (Hopper)
(#624577-5)
Valve Retainer
(#624564-5)
Valve Stem
(#624520-5)
Cylinder (2)
and Mix
Transfer
Tube
(#624585-5)
Quad Ring
(#624594-5)
Manifold
(#624676-5)
Figure 13. “O”-Ring Identification (Actual Size)
(2) Cyl. Top
Piston Shaft
(#624776-5)
12
SECTION 4
MAINTENANCE INSTRUCTIONS
4.1 OVER-RUN ADJUSTMENT
The product when served is a combination of air and
mix. Over-run is a measure of the amount of air blended
into the mix.
Over-run can be expressed in terms of the amount of
weight loss for a given volume. For example, if a pint of
liquid mix weighs 18 ounces and a pint of frozen product
with air added weighs 12 ounces, the over-run is said to
be 50 percent (18oz. – 12oz.= 6oz., (6÷ 12) x 100=
50%).
The over-run can be checked by placing a one pint
container on an ice cream scale and zeroing out the
scale. Then fill a one pint container with frozen product.
The container should be filled over the top and leveled
with a straightedge. The product should not contain any
air pockets. When weighed on an ice cream scale, one
pint of product should weigh 12 to 13 ounces.
The mix pump has been preset at the factory to produce
a product with approximately 40 percent over-run.
Because of differences in mix formulation, temperatures,
and barometric pressure, this figure may vary. A product
with the proper amount of over-run is firm and dispenses
at a smooth even rate. A product in which the over-run
is too low, is yellow, heavy, icy, hard or stiff, and
dispenses at a slow or pulsating rate. A product which
has small air pockets and dispenses smoothly, but with
an occasional popping as the product leaves the spigot,
has the over-run set too high. It will be necessary for
approximately two gallons of mix to be pumped thru the
freezer before changes in the product are noticeable
due to adjustments in over-run.
CAUTION
THE MIX PUMP SWITCH MUST BE IN THE OFF
POSITION WHEN SERVICING OR CLEANING
PUMP.
A. Remove two knobs and safety guard covering drive
mechanism.
B. The position of the stroke is adjusted by loosening
the jam nut (B) above the drive clevis (C) and then
turning the drive clevis up for a higher over-run.
CAUTION
THE DRIVE MECHANISM MUST BE
POSITIONED AT THE TOP OF THE STROKE.
THE TOP OF THE STROKE IS WHEN THE CAM
ROLLER IS IN ITS HIGHEST POSITION. PUMP
DAMAGE WOULD RESULT IF PISTON WERE
TO CONTACT CYLINDER TOP BEFORE
REACHING TOP OF STROKE. A 180 DEGREE
TURN OF THE CLEVIS IS APPROXIMATELY
AN OVER-RUN OF 2-1/2%.
CAM ROLLER
B
C
GUIDE RODS
A
DRIVE PIN
CYLINDER TOP
Over-run is controlled by the relative position of the
piston stroke within the pump cylinder. Raising the
stroke within the cylinder will increase over-run.
Conversely, lowering the stroke will decrease over-run.
To adjust the mix pump for a higher over-run, refer to
Figure 14, and follow the adjustment procedures below:
PISTON
Figure 14. Over-Run Adjustment
13
To adjust the mix pump for a lower over-run, refer to
Figure 14, and follow the adjustment procedures below:
CAUTION
THE MIX PUMP SWITCH MUST BE IN THE OFF
POSITION WHEN SERVICING OR CLEANING
PUMP.
A. Remove two knobs and safety guard covering drive
mechanism.
CAUTION
THE DRIVE MECHANISM MUST BE
POSITIONED AT THE BOTTOM OF THE
STROKE.
Figure 15. Pressure Gauge
B. Connect electrical input power to the mix pump.
B. The position of the stroke is adjusted by loosening
the jam nut (B) above the drive clevis (C), and then
turning the drive clevis down for a lower over-run.
The drive clevis and yoke stud (A) must be engaged
by a minimum of four full threads.
4.2 PRESSURE CONTROL SWITCH
The pressure control switch control the pressure at
which the mix pump cuts in or out. This switch can not
be adjusted.
NOTE
Pressure gauge manifold accessory kit (Part No.
1156527) is available to check pressures.
CAUTION
DISCONNECT ELECTRICAL SUPPLY TO MIX
PUMP BEFORE SERVICING.
A. Install the pressure gauge kit into the pressure
switch. Figure 15.
C. The pressure check must be made with either water
or mix in the freezer cylinder.
D. Place the mix pump switch in the ON position and
check pressures.
4.3 PREVENTIVE MAINTENANCE
It is recommended that a preventive maintenance
schedule be followed to keep the mix pump clean and
operating properly. The following steps are suggested
as a preventive maintenance guide.
WARNING
NEVER ATTEMPT TO REPAIR OR PERFORM
MAINTENANCE ON MIX PUMP UNTIL ALL
MAIN ELECTRICAL POWER HAS BEEN
DISCONNECTED.
The United States Department of Agriculture and the
Food and Drug Administration require that lubricants
used on food processing equipment be certified for this
use. Use lubricants only in accordance with the
manufacturer’s instructions.
14
A. DAILY CHECK
1. Check for any unusual noise or condition and
repair immediately.
B. WEEKLY CHECK
CAUTION
THE MIX PUMP SWITCH MUST BE IN THE OFF
POSITION WHEN SERVICING OR CLEANING
PUMP.
1. Clean and lubricate with liquid sanitary
lubricant or equivalent, the two guide rods on
the pump motor. Apply lubricant to rods with
fingers to eliminate spray accumulation on
other components. Remove the two knobs and
safety guard for access.
C. FOUR MONTH CHECK
1. Every four months, or as required, replace quad
ring in mix pump if worn, or low over-run will
result.
15
16
SECTION 5
TROUBLESHOOTING
WARNING
NEVER ATTEMPT TO REPAIR OR PERFORM MAINTENANCE ON MIX PUMP UNTIL THE MAIN
ELECTRICAL POWER HAS BEEN DISCONNECTED.
5.1 PUMP MOTOR DOES NOT RUN
Cause Correction
Plastic guard is not in place. ............................................ Install plastic guard.
Power to pump is off. ....................................................... Supply power to pump.
Low voltage. .................................................................... Check for low voltage.
Pump motor overloaded. ................................................... Press “Drive Reset” button.
Guide rods on pump are sticky. ....................................... Clean and lubricate. (Refer to Section 4.3B)
Frozen mix particles in liquid mix. .................................... Remove frozen mix.
Pressure switch on pump is defective. ............................. Check continuity of pressure switch. Replace.
Defective starter relay (motor buzzing). ............................ Replace starter relay. (On older models.)
Defective motor. ............................................................... Check motor amperage draw. Replace motor.
Defective toggle switch..................................................... Check continuity, repair or replace.
Defective safety switch..................................................... Check continuity, repair or replace.
Broken wire or loose connection. ...................................... Locate and replace or repair.
5.2 PUMP OPERATES BUT CYLINDER WILL NOT FILL
Cause Correction
Frozen mix particles in liquid mix. ................................... Thaw, remove frozen mix.
Foreign object blocking operation or pump. .................... Disassemble pump and clear blockage.
Mix inlet valve is stuck or “O”-ring defective. ................... Disassemble pump and check mix inlet valve and “O”-
ring.
Mix outlet valve “O”-ring is defective. .............................. Disassemble pump and check “O”-ring.
5.3 LOW OVER-RUN
Cause Correction
Foreign object blocking operation of pump. .................... Disassemble pump and clear blockage.
Air inlet check valve or retainer ....................................... Disassemble pump and check air inlet
stuck or restricting air flow. check valve and retainer.
Air outlet valve is stuck or “O”-ring .................................. Disassemble pump, check air outlet valve
is defective. and “O”-ring.
Pump quad ring is worn out. ............................................ Replace quad ring.
In the event the above Troubleshooting Guide does not help to correct the problem, the local dealer, distributor
of the factory Service Department should be contacted.
17
18
SECTION 6
REPLACEMENT PARTS INFORMATION
6.1 HOW TO ORDER REPLACEMENT
PARTS
To assure the receipt of the proper replacement parts,
supply your dealer, distributor or the company with the
following information:
A. Model number of equipment.
B. Serial number of Model. (Stamped on nameplate.)
C. Part number, part name, and quantity needed. Many
part names and numbers are listed in this manual.
NOTE
Minimum is $50.00.
6.2 PARTS LIST & REFERENCE
DRAWINGS
The following lists and drawings will aid the user when
ordering parts or servicing the mix pump. The parts
listed apply to both the hopper or remote pumps unless
noted otherwise.
19
Figure 16. Hopper Pump Final Assembly
6.3. HOPPER PUMP FINAL ASSEMBLY
Ref. No. Part No. Description Qty.
1 4154611 ....................................Pump Drive ......................................... 1
2 3143083 ....................................Pump Body ......................................... 1
3 3147873 ....................................Safety Guard ...................................... 1
4 482004 ......................................Black Knobs ....................................... 2
5 3122813 ....................................Motor Mounting Plate ......................... 1
6 644106 ......................................Hex Cap Screw (1/4-20) ...................... 4
7 756190 ......................................Tubing ................................................ 1
8 264235 ......................................Hose Clamp ........................................ 2
9 324197 ......................................Wiring Diagram Decal ......................... 1
10 723530 ......................................Pressure Instruction Tag ..................... 1
11 538335 ...................................... Hex Nut (1/4-20) ................................ 4
12 2154670-01 ............................... Model I.D. Plate .................................. 1
20
Figure 17. Mix Pump Parts
21
6.4. MIX PUMP PARTS
Ref. No. Part No. Description Qty.
1 521185 ................................... Mix Transfer Tube Bottom (Hopper) ................ 1
521186 ................................... Mix Transfer Tube Bottom (Remote) ............... 1
2 3158258 .................................Mix Transfer Tube Top ...................................1
3 694247 ................................... Air/Mix Outlet Springs ...................................2
4 762256 ................................... Air/Mix Outlet Valves ....................................2
5 763041 ................................... Safety Valve ...................................................1
6 694635 ................................... Spring ............................................................ 1
7 2143080 .................................Valve Retainer ................................................ 1
8 600070 ................................... Pump Cylinder Body ......................................1
9 2107946 .................................Piston Shaft ...................................................1
10 2107950 .................................Mix Inlet Valve ...............................................1
11 3127452 .................................Cylinder Top ..................................................1
13 221548 ...................................Air Inlet Valve ................................................ 1
14 762274 ...................................Air Inlet Check Valve ......................................1
16 624776 ...................................“O”-Rings .......................................................2
17 624585 ...................................Transfer Tube “O”-Rings .................................3
18 624594 ...................................Piston Quad Ring ...........................................1
19 624556 ...................................“O”-Ring .........................................................1
20 624564 ...................................Valve Retainer “O”-Ring .................................. 1
21 2107959 .................................Large Hand Nut ............................................. 1
22 1115840 ................................. Small Hand Nuts ............................................2
23 2107955 ................................. Top Lock Plate ............................................... 1
24 264019 ...................................Clamp Rod .....................................................1
25 624577 ...................................Mix Transfer Tube “O”- Ring (Hopper) ............. 1
26 681511 ...................................Shield (Hopper) ..............................................1
27 1107958 .................................Flange Washer (Hopper) ................................. 1
28 2119012 ................................. Liquid Level Indicator (Hopper) ....................... 1
29 482004 ...................................Black Knob ....................................................2
30 3147873 .................................Safety Guard .................................................. 1
31 570967 ...................................Drive Pin ........................................................1
32 624676 ...................................“O”-Ring - Manifold ........................................1
33 513011 ...................................Manifold - Quick Connect ...............................1
34 1111815 .................................Locking Plate Washer ..................................... 1
35 539408 ...................................Wing Nuts ...................................................... 2
36 756190 ...................................Tubing ...........................................................1
37 264235 ...................................Hose Clamps ..................................................1
38 624545 ...................................“O”-Ring - Quick Connect Manifold.................
39 312406 ...................................Quick Connect Coupling .................................
2135520 ................................. “O”-Ring Kit ...................................................
2150861 ................................. O”-Ring & Small Parts Kit ...............................1
22
6.5. REMOTE PUMP FINAL ASSEMBLY
Ref. No. Part No. Description Qty.
1 4154612-01 ...........................Pump Drive Remote ................................ 1
1A 4154611 ................................ Pump Drive Hopper ................................. 1
2 3143082 ................................ Pump Body Remote ................................. 1
2A 3143083 ................................ Pump Body Hopper ................................. 1
3 3147873 ................................ Safety Guard ........................................... 1
4 482004 .................................. Black Knobs ............................................ 2
5 3151630 ................................ Motor Mounting Plate – Remote ............... 1
6 644106 .................................. Hex Cap Screw (1/2-20) .......................... 4
7 756190 .................................. Tubing .................................................... 1
8 264235 .................................. Hose Clamp ............................................ 2
9 223162 .................................. Bushing .................................................. 1
10 430022 ..................................Electrical Cord ........................................ 1
12 324199 ..................................Wiring Diagram Decal ............................. 1
13 723530 ..................................Pressure Instruction Tag ......................... 1
14 324113 ..................................Grounding Decal ..................................... 1
15 723529 ..................................Grounding Instruction Tag ...................... 1
16 723526 ..................................Manual Instruction Tag ........................... 1
17 324023 ..................................N.S.F. Decal ............................................ 1
18 538335 ..................................Hex Nut (1/4-20) .................................... 4
19 2154670-02 ........................... Model I.D. Plate....................................... 1
20 739016 ..................................Tie Strap ................................................. 4
23
Figure 19. Pump Drive Assembly
24
6.6. PUMP DRIVE ASSEMBLY
Ref. No. Part No. Description Qty.
2154609-01 .................................... Gear Motor Ass’y. - Remote .........................................
1 2154610-01 ....................................Gear Motor Ass’y. – Hopper ......................................... 1
2 3136896 .......................................... Electrical Box ................................................................ 1
3 3153382 .......................................... Electrical Box Cover ..................................................... 1
4 1144438 .......................................... MTG Bracket (Safety Switch)........................................ 1
5 231041 ............................................Capacitor 7.5 MFD @ 440 VAC- V.W. Motor................. 1
6 718532 ............................................Toggle Switch S.P.S.T. ................................................. 1
7 324150 ............................................Decal – Pump Motor Switch ......................................... 1
* 394463 ............................................ Protector Circuit, 1.5A (* Not Shown) ........................... 1
8 717920-SV ...................................... Pressure Control Ass’y. ............................................... 1
9 513011 ............................................Manifold Assy-Pressure Control-Quick Connect ......... 1
10 1111815.......................................... Locking Plate Washer .................................................. 1
11 624676 ............................................ “O”-Ring Pressure Switch M anifold #513004 ............. 1
12 539408 ............................................ Wing Nut # 10-24 Stainless ......................................... 2
13 649000-23 ...................................... Screw, THD Forming –8-32 x 3/8 LG (S.S.) ................. 4
14 3151630.......................................... Motor Mtg. Plate ............................................................ 1
15 644115 ............................................ Hex HD. Cap Screw – ¼-20 x ¾ LG ............................. 4
16 538335 ............................................ Nut, Hex ¼-20 Locking Fl ange .................................... 4
17 M002468 ......................................... Sealant, Clear – G.E. Silicone ..................................... As Req’d
18 538296 ............................................ Hex Nut #10-24 ............................................................ 2
19 324105 ............................................ Decal – Danger – Elec. Shock Hazard ........................ 1
20 M820172 ......................................... Loctite 242 (Blue) ......................................................... As Req’d
21 647691 ............................................ Screw – 10-24 x ¾” LG ................................................. 3
22 538297 ............................................ Nut – 10-24 .................................................................. 4
23 766948 ............................................ Washer Shake Proof .................................................... 3
24 200023 ............................................ Capacitor Bracket ......................................................... 1
25 1170836-SV ....................................Switch, Safety – Cherry #E13-2L ................................. 1
26 2146015.......................................... Model Identification Plate ............................................. 1
27 647441 ............................................ Screw, Machine – 6-32 x 1” LG .................................... 2
28 766933 ............................................ Washer, Shake Proof #6 .............................................. 4
29 538265 ............................................ Nut, Hex #16-32 C.P. ................................................... 4
30 430292/430292A ............................Harness, Wire W./Terms. ............................................ 3
31 324148 ............................................ Decal – Attention – Plastic Guard ................................ 1
32 324023 ............................................ Decal – N.S.F. .............................................................. 4
33 3136897.......................................... Drive Bracket (Bison) ................................................... 1
34 644091 ............................................ Capscrew – ¼-20 x ½” LG ........................................... 4
35 538329 ............................................ Hex Nut, Nylock ¼-20 ................................................... 6
36 2108109.......................................... Cam Driver Ass’y. ......................................................... 1
37 1108112.......................................... Cam Roller ................................................................... 1
38 2112087.......................................... Drive Yoke Ass’y. .......................................................... 1
39 1108116.......................................... Guide Bushing ............................................................. 2
40 1108117.......................................... Guide Rod .................................................................... 2
41 625407 ............................................ “E”-Ring – Truarc #5133-37 ......................................... 3
42 1112082.......................................... Drive Clevis .................................................................. 1
43 538401 ............................................ Nut, Jam ½-20 .............................................................. 1
44 570967 ............................................ Cotterless Clevis Pin ¼ x 2 LG .................................... 1
45 650256 ............................................ Set Screw ¼ x ¼ ........................................................... 1
46 324113 ............................................ Decal-Caution .............................................................. 1
47 324288/324288A ............................Decal-Wiring Diagram ................................................. 1
48 223162 ............................................ Hayco Bushing #SR-7K-2 ............................................ 1
49 430022 ............................................ Electric Cord (Lyall) ...................................................... 1
50 723529 ............................................ Instruction Tag-Grounding ........................................... 1
51 739040 ............................................ Tie Strap – 7” LG .......................................................... 3
52 723530 ............................................ Instructional Tag-Pressure .......................................... 1
53 723526 ............................................ Instructional Tag-Read Manual ................................... 1
54 264235 ............................................ Hose Clamp ................................................................. 2
55 756190 ............................................ Tubing –Glitex (180-m) x 8” LG .................................... 1
56 482004 ............................................ Knob, Black W 1/4-20 Insert ........................................ 2
57 3147873.......................................... Safety Guard-Plastic .................................................... 1
58 624545 ............................................ “O”-Ring – Manifold – Quick Connect .......................... 1
59 312406 ............................................ Coupling, Quick Connect .............................................1
25
WARRANTY
MIX TRANSFER PUMPS / COCKTAIL / SLUSH
1. Scope:
Stoelting LLC warrants to the first user (the “Buyer”) that the evaporator assembly and compressor (if
applicable) of Stoelting mix transfer pump, cocktail and slush equipment will be free from defects in materials
and workmanship under normal use and proper maintenance appearing within five (5) years (two (2) years for
“Mirage” equipment), and that all other components of such equipment manufactured by Stoelting will be free
from defects in material and workmanship under normal use and proper maintenance appearing within twelve
(12) months after the date that such equipment is originally installed.
2. Disclaimer of Other Warranties
THIS WARRANTY IS EXCLUSIVE; AND STOELTING HEREBY DISCLAIMS ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR
PURPOSE.
3. Remedies:
Stoelting’s sole obligations, and Buyer’s sole remedies, for any breach of this warranty shall be the repair or (at
Stoelting’s option) replacement of the affected component at Stoelting’s plant in Kiel, Wisconsin, or (again, at
Stoelting’s option) refund of the purchase price of the affected equipment, and, during the first twelve (12)
months of the warranty period, deinstallation/reinstallation of the affected component from/into the equipment.
Those obligations/remedies are subject to the conditions that Buyer (a) signs and returns to Stoelting, upon
installation, the Warranty Registration Card for the affected equipment, (b) gives Stoelting prompt written notice
of any claimed breach of warranty within the applicable warranty period, and (c) delivers the affected equipment
to Stoelting or its designated service location, in its original packaging/cratin g, also within that period. Buyer
shall bear the cost and risk of shipping to and from Stoelting’s plant or designated service location.
4. Extensions:
The warranty period for the drive motor to be free of defects in materials and workmanship extended to five (5)
years on the following models: SO218, SO318, SO328.
5. Exclusions and Limitations:
This warranty does not extend to parts, sometimes called “wear parts”, which are generally expected to
deteriorate and to require replacement as equipment is used, including as examples but not intended to be limited
to o-rings, hoses, seals and drive belts. All such parts are sold
Further, Stoelting shall not be responsible to provide any remedy under this warranty with respect to any
component that fails by reason of negligence, abnormal use, misuse or abuse, use with parts or equipment not
manufactured or supplied by Stoelti ng, or damage in transit.
THE REMEDIES SET FORTH IN THIS WARRANTY SHALL BE THE SOLE LIABILITY
STOELTING AND THE EXCLUSIVE REMEDY OF BUYER WITH RESPECT TO
EQUIPMENT SUPPLIED BY STOELTING; AND IN NO EVENT SHALL STOELTING BE
LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER FOR
BREACH OF WARRANTY OR OTHER CONTRACT BREACH, NEGLIGENCE OR
OTHER TORT, OR ON ANY STRICT LIABILITY THEORY.
File: Policy Manual/Warrantyslush1
:
AS IS.
January 30, 2003, Rev. June 1, 2006
Form 721-012, Rev, 1
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