SAFETY DEFINITIONS: Follow all WARNING, CAUTION, IMPORTANT, and NOTE messages in this manual. These messages are
defined as follows: WARNING means you may risk death or serious personal injury; CAUTION means you may risk personal injury,
property damage, or serious unit damage; IMPORTANT means you may risk unit damage; and NOTEs provide clarity and helpful
tips. These safety messages cover situations ROBINAIR is aware of. ROBINAIR cannot know, evaluate, and advise you regarding all
possible hazards. You must make sure all conditions and procedures do not jeopardize your personal safety.
DISCLAIMER: All information, illustrations, and specifications contained in this manual are based on the latest information available
at the time of publication. The right is reserved to make changes at any time without obligation to notify any person or organization of
such revisions or changes. Further, ROBINAIR shall not be liable for errors contained herein or for incidental or consequential damages
(including lost profits) in connection with the furnishing, performance, or use of this material. If necessary, obtain additional health and
safety information from the appropriate government agencies, and the vehicle and coolant manufacturers.
Warning
Before using the coolant exchanger, read, understand, and follow the safety precautions and operating
instructions outlined in this manual. This equipment must be operated by qualified personnel – the operator must be
familiar with vehicle cooling systems, coolants, and the dangers they present.
– If the operator cannot read English, operating instructions and safety precautions must be read and discussed in the
operator's native language.
– Si el operador no puede leer inglés, las instrucciones de operación y las precauciones de seguridad deberán leerse y
comentarse en el idioma nativo del operador.
– Si l'utilisateur ne peut lire l'anglais, les instructions et les consignes de sécurité doivent lui être expliquées dans sa langue
maternelle.
Do not drink antifreeze or solution. Avoid inhaling mist or hot vapors. (Ethylene glycol base.) If swallowed, drink
two glasses of water; induce vomiting; and call a physician. If inhaled, move to fresh air and call a physician. Use the unit
in locations with mechanical ventilation that provides at least four air changes per hour. If accidental system discharge
occurs, ventilate the work area before resuming work.
Do not store ethylene glycol based solutions in open or unlabeled containers. Ethylene glycol causes birth defects
in laboratory animals; solution may taste pleasant to animals, but is poisonous to them.
Contact with antifreeze/coolant may cause injury.Hot antifreeze/coolant can burn skin and injure eyes. Wear
protective equipment, including safety goggles and gloves, when operating this equipment. If contact with eyes occurs,
call a physician immediately, and flush eyes with cold water for 30 minutes. If contact with skin occurs, thoroughly wash
area with soap and water.
Vehicle cooling systems which are hot, are under pressure — opening a hot system, except as described in this
manual, can cause an uncontrolled release of engine coolant. Do not open the radiator cap, and do not remove hoses
from a hot system except as directed in this manual.
Do not pressurize the vehicle cooling system above its pressure rating. Doing so may result in cooling system failure
and the release of engine coolant.
Never run a vehicle engine without adequate ventilation. Breathing vehicle emissions can cause sickness, injury, or
death.
Working in the vicinity of a lead-acid or other automotive battery is dangerous. Wear eye protection. NEVER smoke,
or allow a spark or flame in the vicinity of a battery. Batteries generate explosive gases during normal battery operation.
This equipment is not designed for any other purposes than testing cooling systems and exchanging used antifreeze/
coolant with new or recycled product.
The operator is responsible for complying with any and all applicable laws and regulations governing the use of this type
of equipment, as well as disposal of used antifreeze/coolant and used equipment and components.
The 75700 COOLXCHANGE offers everything you need to quickly remove and replace coolant in a vehicle:
drain and fill, and pressure test for leaks. Two external, new coolant supply tanks allow on-board storage of
two different coolant types.
No electricity is needed—shop air powers the unit. No hoses to cut. No additional ventilation is required—the
service procedure is performed with the engine off. The coolant transfer process is “hands of f”—simply make
the correct connections and watch it happen. A typical exchange procedure may take only 10 minutes!
Pressure Gauge
IMPORTANT : For
correct operation of
the 75700 unit, adjust
Valve 1 and Valve 2
in the sequence
specified in these
instructions.
Impact-resistant
Polypropylene Cabinet
Valve 1
Valve 2
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Pressure Regulator
Hoses may be
stored on unit.
Technical Specifications
Power Supply : 80–120 psi shop air
Internal Tank :15-gallon capacity waste tank
External Tanks : Two 7-gallon capacity supply tanks
Dimensions :47" H x 26" W x 33" D
(119 cm x 66 cm x 84 cm)
2
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Sight Gauge for Waste Tank
Glossary
Antifreeze : Substance used to lower the freezing
point of another liquid; has not yet
been mixed with water .
Coolant :A mixture of antifreeze and water.
System :The cooling system of the vehicle
being serviced.
Unit :The 75700 COOLXCHANGE.
Page 5
Setup
Attach Hoses
1. Attach the black hose (new coolant) to the top
coupler on the upper left side of the unit’s rear
panel. The decal next to the coupler is marked
“Coolant Outlet to Car.” See Figure 1.
2. Attach the clear hose (waste coolant) to the
bottom coupler marked “Coolant Inlet from Car.”
3. Verify Valve 1 and Valve 2 on the 75700 unit are
in the OFF position.
4. Connect an air coupler fitting (user-supplied) to
the air supply inlet. Attach a shop air line to the
fitting that is regulated to supply 80–120 psi of
clean compressed air .
Assemble Supply Tanks
The 75700 is shipped with two empty supply tanks,
which will be filled with new coolant and strapped
to the back of the unit.
1. Fill one supply tank with new coolant. Install the
dip tube cap on the tank. See Figure 2.
Black Hose
(new coolant)
Clear
Hose
(waste
coolant)
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28
28
24
24
20
20
20
Figure 1
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Attach air
coupler
fitting (not
supplied).
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Supply
27
28
28
24
24
20
Hose
Note: You may fill the second supply tank with a
different type of coolant, or you may leave it
empty at this time. Install the solid cap on the
second tank.
2. Place both tanks side-by-side on the back of the
unit, and secure them with the Velcro® strap.
4. Attach the supply hose coupler to the dip tube
cap as shown in Figure 1.
2
7
2
2
8
8
2
2
4
4
2
0
2
2
0
0
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2
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E
A
A
R
R
R
R
S
S
T
T
1
1
2
2
8
S
S
8
8
4
4
4
Dip Tube Cap
for Supply Tank
Solid Cap
for Supply Tank
Supply Tank
Figure 2
Cool Tech 75700 CoolXchange
3
Page 6
Relieve Cooling System Pressure
WARNING: Cooling systems that are hot,
are under pressure. Working on a hot cooling
system without first relieving the pressure
will result in serious personal injury.
On some systems it is necessary to allow the cooling
system to cool before servicing the vehicle. On
vehicles that have a radiator cap, it is possible to relieve
pressure by drawing a vacuum on the overflow port.
System Inspection
Before starting the service procedure, verify :
the 75700 unit is connected to a supply tank
•
holding the correct amount and type of new
coolant for the vehicle being serviced.
Black Hose
(new coolant)
Figure 3
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Valve in
OPEN
position.
the waste coolant tank has enough capacity to
•
exchange the desired amount of coolant.
Note: Running the unit with a full waste tank will
degrade the performance of the unit.
the vehicle ignition is in the OFF position.
•
valves 1 and 2 on the 75700 unit are OFF.
•
the valve on the black hose is open. See Figure 3.
•
the filter screen on the clear hose is clean.
•
Relieve Pressure on a Hot System
that has a Radiator Cap :
1. Remove the vehicle’s overflow tank hose from
the coolant overflow barb on the radiator neck.
2.
Two sizes of siphon tubes have been included with
the 75700 unit. See Fig. 4. Select the siphon tube
which most closely matches the size of the coolant
overflow barb on the vehicle’s radiator neck.
3. Slide the siphon tube onto the coolant overflow
barb on the radiator neck.
Siphon Tubes
Figure 4
Siphon tube
assembled
between clear
hose and
overflow barb
on radiator.
4. Connect the coupler end of the siphon tube to the
clear hose from the 75700 unit. See Figure 5.
5. Turn both valves on the unit to VACUUM. As the
valve in the radiator cap releases pressure,
coolant may be seen in the siphon tube.
6. After pressure is relieved, turn both valves OFF.
4
Figure 5
Page 7
Lower the Coolant Level
1. After the cooling system has been depressurized
or cooled down, CAREFULLY remove the
coolant reservoir cap and the radiator cap.
2. With the coupler end of the siphon tube
connected to the clear hose (waste coolant) from
the 75700 unit, insert the other end of the siphon
tube into the coolant reservoir.
3. Turn both valves on the unit to VACUUM to
empty the coolant reservoir.
4. Insert the siphon tube into the radiator, and lower
the coolant level in the radiator to a level below
the upper radiator hose.
5. Turn both valves on the 75700 unit OFF.
6. Remove the siphon tube from the radiator, and
disconnect it from the clear hose.
7. Reinstall any disconnected hoses on the vehicle.
8. Reinstall the radiator cap and coolant reservoir
cap.
Siphon Tube
Use siphon tube to
lower coolant level
in radiator.
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Figure 6
Cool Tech 75700 CoolXchange
5
Page 8
Vehicle Connections
The upper radiator hose may be disconnected either
where it connects to the radiator or where it
connects to the engine, whichever is most
convenient on the vehicle being serviced.
1. Disconnect the upper radiator hose from the
radiator or the engine.
Hose / Step
Adapter
Assembly
2. Insert a step adapter into the radiator hose. See
Figure 7.
3. Select an adapter hose that has the same inner
diameter as the radiator hose. Clamp a step
adapter to the hose, and then clamp the assembly
to the hose barb where the upper radiator hose
was connected.
4. Connect the clear hose (waste coolant) to the step
adapter leading into the radiator.
5. Connect the black hose (new coolant) to the step
adapter leading into the engine. The valve on the
black hose should be OPEN. See Figure 8.
6. Pinch off the coolant overflow hose and any
other hoses connected to the coolant reservoir.
See Figure 9.
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Radiator
Black Hose
(new coolant)
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Figure 7
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Step
Adapter
Valve in
OPEN
position.
6
Coolant overflow
hose pinched off.
Figure 8
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Figure 9
Page 9
Pressure Test
This procedure checks the coolant system for leaks.
A drop in pressure indicates a leak in the system
that must be repaired before refilling the system
with coolant.
IMPORTANT: For correct operation of the
75700 unit, adjust Valve 1 and Valve 2 in the
sequence specified in these instructions.
1. Turn the regulator on the 75700 control panel
counterclockwise (CCW) to lower the test
pressure. See Figure 10.
Note: Adjusting the regulator requires pulling up
on the regulator knob, and then turning the knob.
2. Turn Valve 1 to PRESSURE TEST.
3. Turn Valve 2 to PRESSURIZE.
4. Adjust the regulator clockwise to the correct test
pressure.
Valve 1
Pressure Gauge
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Valve 2
Figure 10
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Regulator
CAUTION: To prevent damage to the
vehicle, test pressure must range BELOW the
pressure indicated on the radiator cap,
overflow cap, or vehicle specifications.
5. Turn Valve 2 to HOLD.
6. Observe the pressure gauge on the control panel:
a constant pressure reading indicates no leaks
•
in the system;
a drop in pressure indicates a leak in the system
•
that must be repaired.
Note: The cooling system may need to be
pressurized more than once to equalize test
pressure throughout the system.
7. If a leak must be repaired, turn both valves to
VACUUM to relieve pressure. Perform repairs,
and repeat the Pressure Test.
If no repairs are needed, proceed to the Exchange
Procedure.
Cool Tech 75700 CoolXchange
7
Page 10
Exchange Process
IMPORTANT: For correct operation of the
75700 unit, adjust Valve 1 and Valve 2 in the
sequence specified in these instructions.
1. Note the level of coolant in either the sight gauge
for the waste coolant tank or the new coolant
tank on the back of the unit.
2. Turn Valve 1 to EXCHANGE.
3. Turn Valve 2 to EXCHANGE.
4. Watch the fluid level indicator. After exchanging
the correct amount of coolant (based on the
vehicle’s cooling system capacity), turn Valve 1
OFF. Turn Valve 2 OFF.
Note: The coolant running through the waste
hose at this time should be clean. If not, continue
the exchange process until the coolant running
through the waste hose is clean.
Complete the Exchange Process
Black Hose
(new coolant)
Black Hose
(new coolant)
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Valve in
CLOSED
position.
This procedure will top off the coolant in the
radiator and fill the coolant overflow reservoir.
1. Remove the step adapters and hoses. Reassemble
the upper radiator hose to the vehicle.
2. Release any pinched-off hoses.
3. Connect the siphon tube to the black hose (new
coolant).
4. Remove the radiator cap and/or coolant reservoir
cap.
5. Close the valve on the end of the black hose
(new coolant). See Figure 11.
6. Turn both valves on the 75700 to EXCHANGE.
7. Insert the siphon hose into the radiator and/or
coolant overflow reservoir, and open the valve on
the end of the black hose. Top off the coolant in
the radiator, and fill the coolant overflow
reservoir to the FULL indicator.
8. Replace the radiator cap and coolant reservoir
cap.
9. Start the engine to purge any air in the system.
Repeat the procedure to top off the coolant
system as needed.
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Valve in
OPEN
position.
Figure 11
Tech Tip
Some vehicles require a different vehicle hookup
due to the way the coolant flows through the
system.
If, during the exchange process, you can’t hear
the pump running, and the flow rate is slower than
usual, it may be necessary to change the way the
hoses are connected to the vehicle.
1. Connect the clear hose (waste coolant) to the
step adapter leading into the engine.
2. Connect the black hose (new coolant) to the
step adapter leading into the radiator. The valve
on the black hose should be OPEN.
3. Leave the coolant overflow hose and any other
hoses connected to the coolant reservoir
pinched off.
4. Repeat the Exchange Process.
8
Page 11
Changing Supply Tanks
This procedure outlines how to switch supply tanks
so the 75700 will exchange the correct type of
coolant for the vehicle being serviced.
1. Disconnect the supply hose from the dip tube
cap. See Figure 12. Remove the dip tube cap.
Maintenance
Supply Hose
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Dip Tube Cap
2. Connect the siphon tube to the black hose (new
coolant).
3. Insert the other end of the siphon tube into the
supply tank.
4. Turn the valves on the 75700 to EXCHANGE
until coolant stops flowing in the siphon tube.
5. Turn the valves on the 75700 OFF.
6. Connect the dip tube cap to a supply tank
containing the type of coolant that is correct for
the vehicle being serviced.
7. Connect the supply hose to the dip tube cap.
Emptying the Waste Tank
Running the 75700 unit with a full waste tank will
degrade the performance of the unit.
1. Connect the siphon tube to the black hose (new
coolant).
2. Insert the other end of the siphon tube into a
waste barrel.
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2
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2
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2
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4
2
0
2
2
0
0
1
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Supply Tank
Figure 12
3. Turn both valves on the 75700 to EMPTY
WASTE.
4. Watch the sight glass for the waste tank. See
Figure 13. Empty the tank completely.
IMPORTANT: Do not leave any waste
coolant in the black hose because it
functions as the new coolant hose when
servicing a vehicle.
Cool Tech 75700 CoolXchange
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Figure 13
Waste Tank
Sight Glass
9
Page 12
Maintenance
Cleaning the Filter
Sediment will collect in the filter that is installed on
the waste hose. See Figure 14. Routinely clean the
filter to keep the unit operating correctly.
1. Unthread the cap from the filter body.
Filter
2. Rinse the screen and the inside of the cap under
running water .
3. Reassemble the filter.
Clear Hose
(waste coolant)
Figure 14
10
Page 13
Troubleshooting
SymptomCauseSolution
Coolant exchanger does not
operate.
Unit does not relieve pressure
in vehicle cooling system.
OR
Unit does not lower coolant
level in radiator or coolant
reservoir.
Unit does not hold pressure
during pressure test.
1. Air supply is not connected to
unit.
1. Filter screen on waste coolant
hose is plugged.
2. Waste coolant tank is full.
3. Air supply pressure is too low.
4. Unit hoses are assembled
incorrectly.
1. Hoses connected to coolant
reservoir not pinched closed.
1. Attach shop air line to unit that
is regulated to supply 80–120 psi
of clean compressed air. Refer
to “Setup” in this manual.
1. Unthread cap from filter; rinse
screen and inside of cap under
running water. See “Maintenance.”
2. Connect siphon tube to black
hose; insert tube into waste
barrel; turn valves to EMPTY
WASTE. See “Maintenance.”
3. Regulate shop air line to 80–
120 psi of clean compressed air.
See “Setup.”
4. Attach black hose to top
coupler; attach clear hose to
bottom coupler. See “Setup.”
1. Use pliers to pinch off coolant
overflow hose and other hoses
connected to coolant reservoir.
Refer to “Vehicle Connections.”
No, or slow, exchange.
2. Test pressure is too high.
3. Leak in cooling system.
1. Vehicle requires a different
hookup.
2. Valve on new coolant hose not
completely OPEN.
3. Filter screen on waste coolant
hose is plugged.
2. Test pressure must be below
pressure indicated on radiator
cap, overflow cap, or vehicle
specs. See “Pressure Test.”
3. Repair leak and repeat “Pressure Test.”
1. Connect clear hose to engine;
connect black hose to radiator.
See Tech Tip in “Exchange
Process.”
2. Open valve. See “Exchange
Process.”
3. Unthread cap from filter; rinse
screen and inside of cap under
running water. See “Maintenance.”
contd.
Cool Tech 75700 CoolXchange
11
Page 14
Troubleshooting
SymptomCauseSolution
No, or slow, exchange
contd.
Coolant level in coolant
reservoir rising or overflowing
during exchange procedure.
Fluid level in new coolant tank
does not decrease during
exchange.
4. Waste coolant tank is full.
5. Air supply pressure to unit is
too low.
6. Hoses are incorrectly
assembled to 75700 unit.
1. Hoses connected to coolant
reservoir not pinched closed.
1. Coolant supply hose not
connected to new tank.
2. Valve on new coolant hose not
completely OPEN.
4. Connect siphon tube to black
hose; insert tube into waste
barrel; turn valves to EMPTY
WASTE. See “Maintenance.”
5. Regulate shop air line to 80–
120 psi of clean compressed air.
See “Setup.”
6. Attach black hose to top
coupler; attach clear hose to
bottom coupler. See “Setup.”
1. Use pliers to pinch off coolant
overflow hose and other hoses
connected to coolant reservoir.
Refer to “Vehicle Connections.”
1. Attach coolant supply hose to
dip tube cap on supply tank. See
“Setup.”
2. Open valve. See “Exchange
Process.”
12
Page 15
Flow Chart
BottomTop
Valve 1 Flow Paths
Vacuum
OFF / Pressure Test
P
Exchange
Empty Waste
Top
Valve 2
TopBottom
OFF
Valve 2 Flow Paths
Valve 2
Bottom
Pressurize
Exchange / Vacuum
Hold
Air
Regulator
Filter /
Reg
Air In
Regulator
Valve 1
Bottom
Pump
Venturi
Exhaust
New
Waste Tank
Tank
Top
Valve 1
Cool Tech 75700 CoolXchange
13
Page 16
Accessories
Here are some optional accessories, available from
SPX Robinair, to help you take the guesswork out
of servicing cooling systems.
Radiator Coolant Dye
Pinpoint leaks in radiators, water pumps, head
•
gaskets, and hoses and fittings.
Extended-life dye is formulated for use in
•
extended-life coolants, which elimates the color
distortion problem found with existing radiator
coolant dyes.
Extended-life dye is for use with red, orange, or
•
yellow extended-life coolants.
Each bottle services one vehicle.
•
No. 16266 – Extended-life radiator coolant dye.
Six (1 oz. / 30 ml) bottles.
No. 16255 – Standard radiator coolant dye.
Six (.25 oz. / 7.5 ml) bottles.
Cordless / Rechargeable True UV Light
16266
16255
16345
12 LEDs produce high-intensity true UV light.
•
(100,000 hour LED bulbs.)
Nickel metal hydride battery (does not develop a
•
memory). Battery life is 3 hours (continuously
ON). Includes battery charger and UV-enhancing
glasses.
This product is warranted to be free from defects in workmanship, materials, and
components for a period of one year from date of purchase. All parts and labor
required to repair defective products covered under the warranty will be at no
charge.
The following restrictions apply:
1. The limited warranty applies to the original purchaser only.
2. The warranty applies to the product in normal usage situations only, as described in the Operating Manual. The product must also be serviced and maintained as specified.
3. If the product fails, it will be repaired or replaced at the option of the manufacturer.
4. Transportation charges for warranty service will be reimbursed by the factory
upon verification of the warranty claim and submission of a freight bill for
normal ground service. Approval from the manufacturer must be obtained prior
to shipping to an authorized service center.
5. Warranty service claims are subject to authorized inspection for product
defect(s).
Limited
Warranty
6. The manufacturer shall not be responsible for any additional costs associated
with a product failure including, but not limited to, loss of work time, loss of
coolant, and unauthorized shipping and/or labor charges.
7. All warranty service claims must be made within the specified warranty period.
Proof-of-purchase date must be supplied to the manufacturer.
This Limited Warranty does NOT apply if:
• The product, or product part, is broken by accident.
• The product is misused, tampered with, or modified.
• The product has been used for any purpose other than exchanging and testing
engine coolant.
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