1. Carefully read the BG PF5HO Reference Manual before assembling and using any part of the system.
2. Before handling any chemical, read its Material Safety Data Sheets.
3. Wear safety goggles to protect your eyes.
4. Wear Nitrile®, Neoprene® or PVC gloves to protect your hands.
5. Wear a long-sleeved shirt.
6. A combination of mechanical and local ventilation should be used to prevent operator exposure to noxious fumes.
7. Keep all hoses and tools away from moving engine parts.
8. Check all lines and fittings for cracks and leaks before and after service.
9. Use EXTREME CAUTION when removing transmission lines and/or adaptors before and after the service. transmission fluid could be under pressure and will likely be very hot. Be very careful in handling connections because they will also be very hot.
10. Dispose of used transmission fluid in accordance with Federal, State, and Local regulations.
11. The BG PF5HO is designed to be used only with BG products described in this manual. The use of any other chemicals or fluids other than conventional transmission fluid, mineral- or synthetic-based, with this system will void all warranties and could create hazardous conditions.
12. Do not spray solvents on sight glass. Sight glass should be cleaned using mild detergents only.

General Information

The BG PF5 High Output Power Flush and Fluid Exchange System, (BG PF5HO) is not just a piece of equipment; it is the cornerstone of the BG Transmission. Automotive transmissions and their numerous parts suffer from overheating due to extreme pressure and high operating temperatures. This causes the transmission fluid to oxidize rapidly, negatively affecting the performance of the transmission in many ways.

Conventional drain and fill methods of changing the transmission fluid can only remove about one third of fluid from automatic transmissions. The remaining worn out, oxidized fluid contaminates the new fluid the mixture may cause more damage than if the old fluid had been left alone. Also, conventional drain and fill methods do not chemically clean the inside of the transmission because the cleaner and dissolved contaminants could not be fully removed.

The BG PF5HO is the premier solution to effective transmission maintenance for traditional step-shift automatic transmissions, belt-and chain-driven continuously variable transmissions (CVT), wet dual clutch transmissions (DCT) and direct-shift gearboxes (DSG) and all types of vehicles, regardless of age. The BG PF5HO does it cleaner, faster and more economically than conventional drain and fill methods.

The BG Transmission Service begins with a thorough cleaning with BG Quick Clean for Transmissions, PN 106. ALL internal transmission components, including the valve body (which is the control center); the torque converter; oil galleys and clutch pack and filter screen, are cleaned. ALL externally connected components including transmission lines and coolers, are cleaned as well. Cleaning the lines and coolers is so important that OEMs recommend this service and offer specialized tools for cleaning these components.

Next, the BG PF5HO uses a very simple but highly effective method of removing all the old fluid and flush while simultaneously installing new transmission fluid of the exact specification required for each and every vehicle. The BG PF5HO operates cleaner, faster and is more economical than conventional drain and fill methods. The same amount of transmission fluid is consumed for each service so it is easy for the parts department to control material costs per job.

The final step in the BG PF5HO is the installation of BG ATC Plus, PN 310, to restore pliability to seals and prolong the life of the new transmission fluid by protecting it from the ravaging effects of oxidation.

The BG PF5HO is not a repair service—it is a maintenance service. A thorough inspection of the transmission, including related components such as lines and coolers, should be performed and all repairs made before performing this service.

Check the vent on top of the transmission to be sure it is open and functioning. Inspect seal areas and gaskets and replace any that are leaking or badly deteriorated. If the pan gasket needs replacing, it is recommended that the transmission filter be replaced as well. In fact, the filter should be changed anytime a repair service requires that the pan be removed. Check hoses, metal lines and connections to be sure all are in good repair.

Specifications

Limited Warranty

This product is warranted by BG Products, Inc. to be free of defects in workmanship and materials for a period of 1 year from the date of purchase by original purchaser. If the product fails within this period, it will be repaired or replaced at seller’s option, provided (1) the product is submitted with proof of purchase date and (2) transportation charges are prepaid to the nearest Service Center. Liability under this warranty is expressly limited to repairing or replacing the product or parts thereof. This warranty does not apply to product or parts broken by accident, negligence, overload, abuse or if they have been tampered with or altered in any way. This warranty does not apply to service hoses and adaptors which may need replacing due to normal wear. If this warranty does not apply, then the purchaser shall pay all costs for labor, material and transportation. Note: The use of this apparatus for any purpose other than the services described will render this warranty null and void, as will the use any chemicals other than the BG products described in this manual. No other warranties are expressed or implied.

Initial Setup and Charging (Filling)

1. Unpack system and check for shipping damage and missing parts and components. Place adaptors in drawer.
2. Remove plug from V4 Drain valve and install barbed fitting as shown in the drawing at right. The V4 Drain valve is used to remove transmission fluid from the transmission, when necessary, to make room for cleaner and conditioner.
3. For initial charging (filling) of the apparatus:
   
   1. Turn the V5 Control lever to “Check Flow/Recharge” (O). Turn V1 Control lever to “Recharge”(O). Attach adaptor #20, or any open-end adaptor, to the end of either service hose (H1 or H2). The adaptor opens the valve in the quick coupling to allow used fluid to flow out. Expect only a small amount of air during initial filling.
   2. Attach recharge adaptor #19 to the “Recharge” (R) port on the side of the BG PF5HO. Be sure the V3 Vent valve is turned to “Close”(O). Apply air pressure to the adaptor until the New transmission fluid pressure gauge (N) reads approximately 90 PSI and the Used transmission fluid pressure gauge (U) reads “0.” Remove air supply and turn the V1 Control lever to “Pressure Release” (PR) until New transmission fluid pressure gauge (N) reads “0.” This procedure will move the rubber bladder into position for initial filling. Be sure the clear hose is connected to the V3 Vent valve on the side. Place the loose end of the hose into the bottle provided. Turn the V3 Vent valve to “Open”( I ).
   3. Remove V2 Manual Fill cap from the Manual Fill tube and install the included funnel. Slowly turn the V2 Manual Fill valveto “Fill” ( I )–there may be a small amount of air pressure or vacuum in the tank. Pour approximately 3 to 7 gallons (11 to 27 Liters) of the appropriate transmission fluid into the funnel, depending on the capacity of the tank being used. Keep filling until a full stream of fluid is visible at the V3 Vent valve on the side of the BG PF5HO. This procedure ensures that the system is full and all trapped air has been removed. Allow fluid to drain from the V3 Vent valve until it is just below the V2 Manual Fill valve on Manual Fill tube.
   4. Turn the V3 Vent valve to “Close”(O) and the V2 Manual Fill valve to “Close”(O). Either cap the funnel or remove it and replace V2 Manual Fill cap. This cap is not a pressure seal and should only be finger-tight.
   5. Remove the #19 recharge adaptor. Remove the #20 open-end adaptor from the service hose (H1 or H2).

The BG PF5HO is now ready for service.

Operating Instructions

IMPORTANT! BG Transmission Service is a maintenance service, not a repair service! A thorough inspection of the transmission, including lines and coolers, should be performed and all repairs made before performing this service. Check the vent on top of the transmission to be sure it is open and functioning. Inspect seal areas and gaskets and replace any that are leaking or badly deteriorated. If the pan gasket needs replacing, it is recommended that the transmission filter be replaced as well. The filter should be changed anytime the pan is removed. Check hoses, metal lines and connections to be sure all are in good repair.

1. Start the vehicle’s engine and run until normal operating temperature is reached.
2. Check transmission fluid level. If it is more than 32 oz. (946 mL) low, add fluid, but leave room for 11 oz. (325 mL) of BG Quick Clean for Transmissions, PN 106. DO NOT overfill transmissions. Do not overfill transmissions.
3. Add the contents of one 11 oz. (325 mL) can of BG Quick Clean for Transmissions, PN 106, in transmission fluid dipstick port. (See note at the end of this section for installing cleaner or conditioner in transmissions without dipsticks.) The vehicle should then be driven for 15 minutes. If it cannot be driven, it should be placed on a lift so that the vehicle’s wheels are above the floor. With the engine running, shift the transmission through all the gears so the valve body in the transmission is actuated to ensure BG Quick Clean gets to all parts. During this procedure, make sure the brake is fully applied and drive wheels have stopped turning between gear changes to prevent damage to transmission or differential assemblies. After adding BG Quick Clean, vehicle should not be run more than 30 minutes before performing the transmission fluid exchange.
   NOTE: If the vehicle cannot be driven or placed on a lift, chock the wheels, apply brakes (including parking brake) and carefully shift transmission through the gears several times with engine running at idle speed.
   Vehicle is now ready for the transmission fluid exchange.
4. Shut off engine and locate a junction in either of the two transmission lines that will allow you to install one of the included adaptors to each end of the junction. See “Possible Points to Make Connections” in this manual. Separate the line at the junction chosen and attach adaptors. Use pinch off clamps on rubber lines to prevent transmission fluid loss while connections are being made.
   NOTE: Some vehicles also use the radiator to help cool the engine oil. Be sure the lines you are working with actually go to the transmission and not the engine!
5. Turn the V3 Vent valve on the side of the BG PF5HO to “Open” ( I ), to be certain that there is no pressure in the machine. Turn the V3 Vent valve to “Close” (O) before attempting to use.
6. Connect BG PF5HO service hoses (H1 and H2) to adaptors. Either hose can be attached to either adaptor–flow direction will be corrected after the vehicle’s engine is started.
7. Turn V5 Control lever to “Check Flow/Recharge” (O) and start the vehicle’s engine. Check for leaks.
8. Determine flow direction through the sight glass; flow should be from right to left. Correct flow direction (CF), if required, by turning the V1 Control lever 90°. Caution: V5 Control lever must remain in “Check Flow/Recharge” (O) position until flow direction has been corrected.
9. With engine running, turn V5 Control lever to “Process” ( I ). The transmission’s own pump will begin the exchange immediately by pumping its used transmission fluid into the collapsed compartment of the tank. This instantly exerts pressure on the diaphragm which forces new transmission fluid out through the service hose (H1 or H2) and into the transmission at the same rate of flow and pressure that used transmission fluid is being pumped into the tank via the other service hose (H1 or H2).This means that the level of fluid in the transmission and components remains the same at all times during the exchange. The fluid level in the transmission does not require monitoring. For best results, the operator should be inside the vehicle shifting the transmission through its gears as in step #3 to ensure that all cleaner and used transmission fluid is purged from the valve body.As the transmission continues to pump used transmission fluid into the tank, the diaphragm is collapsed against the other side. A preset bypass valve will open after a pressure differential exists between the New and Used transmission fluid lines. This will route the incoming fluid around the tank and into the new transmission fluid line going to the transmission.
   NOTE: A few transmission pumps produce “0” pressure at idle and the engine RPM must be increased until the Used transmission fluid gauge shows at least 10 PSI. There are also a few transmission pumps that will only produce pressure when in drive. If increasing the RPM does not produce a pressure reading, place the vehicle in drive.
   CAUTION: Be certain that the parking brake is set and wheels are chocked before putting vehicle in drive. Do not leave vehicle unattended!
   The exchange is complete when a pressure differential (approximately 15–30) is noted between the New (N) and Used (U) transmission fluid gauges.
   NOTE: The BG PF5HO model contains a booster pump that can be engaged to speed up the exchange on low pressure, low flow transmissions. To activate the pump, connect the 12V cables to the vehicle’s battery and set switch to “Boost” (B). You will see a reduction in pressure on both gauges (N) and (U). This is normal and you should note an increase in flow on the sight glass. Turn the booster switch to “Off” (O) when exchange is complete. The booster pump can be turned “On” or “Off” (O) at any point during the exchange.
10. When the fluid exchange is complete, check the level of transmission fluid in the transmission. Leave room to add 11 oz. (325 mL) of BG ATC Plus, PN 310, or BG CVT Plus, PN 303.If some transmission fluid needs to be removed, leave engine running, turn the V5 Control lever to “Check Flow/Recharge” (O) and use the V4 Drain valve to dispense the amount you wish to remove. Turn V5 Control lever to “Process” ( I ) when complete.
    CAUTION: The transmission fluid is very hot, so use a deep container and place the end of the spout as close to the bottom as it can go to prevent splattering.
    Shut off engine and turn V1 and V5 Control levers to “Pressure Release” (PR) to remove any pressure trapped in the system. Remove adaptors and reconnect transmission fluid lines. Add the contents of one 11 oz. (325 mL) can of BG ATC Plus, PN 310, or CVT Plus, PN 303, if it was not already in the new transmission fluid.NOTE: For Vehicles without dipsticks the BG PF5HO can install cleaner, conditioner or additional transmission fluid with the vehicle’s engine running. Pour the desired amount of fluid into the V2 Manual fill funnel. Do not open the V2 Manual fill ball valve. Set pump switch to “Add” ( + ) until funnel is empty. Set pump switch to “Boost” (B) for approximately 15 seconds to ensure the fluid ends up in the vehicle instead of pump head. Set pump switch to “Off” (O).Service is complete.

Recharging

The tank in the BG PF5HO must be recharged with new transmission fluid before the next service. It can be recharged easily and quickly from any transmission fluid source, with any factory specification transmission fluid required by the next vehicle to be serviced. The process for recharging the apparatus will also discharge the captured used fluid from the last service.

To recharge by either pressurized or manual filling, turn V5 Control lever to “Check Flow/ Recharge” (O) and the V1 Control lever to “Recharge” (O). Attach adaptor #6 to service hose (H1 or H2) and place end in the used oil receptacle.

Next, attach #19 recharge adaptor to the Recharge port on the side of the BGPF5HO. Do not attempt to apply air or fluid pressure to the service hoses because these are not regulated and the system will be damaged. Attach to shop air for manual filling or to the shop’s pressurized transmission fluid supply hose for pressure filling.

1. For pressurized recharging, turn the V5 Control lever to “Check Flow/Recharge” (O). Turn V1 Control lever to “Recharge” (O), and apply pressurized transmission fluid to the #19 recharge adaptor on the Recharge port (R). Let chamber fill until Used transmission fluid gauge (U) reads “0” and pressure on the New transmission fluid gauge (N) starts to rise. This reading indicates all used fluid has been expelled and the tank is now filled with new fluid.
2. Remove pressurized transmission fluid and turn V5 Control lever to “Pressure Release” (PR). Pressure is vented back into the service hoses (H1 and H2) and into the used oil storage tank through the hose that is opened.Recharging is complete. The BG PF5HO is ready for the next vehicle service.

1. For manual recharging, turn V5 Control lever to “Check Flow/Recharge”(O). Turn V1 Control lever to “Recharge” (O) and attach the #19 recharge adaptor to the Recharge port (R) on the side of the BG PF5HO. Turn the V3 Vent valve to “Close”(O). Place the hose from the V3 Vent valve into a clean, empty container. Attach the #6 adaptor to service hose (H1 or H2) and place the end into the used oil receptacle.
2. Apply shop air into the recharge adaptor on the Recharge port (R), until the pressure reading on the Used transmission fluid gauge (U) reads “0.” This indicates that all used transmission fluid has been expelled and bladder is fully collapsed against the bottom of the tank. Remove the air supply and turn the V5 Control lever to “Pressure Release” (PR) until the New transmission fluid gauge (N) reads “0.”
3. Next, remove V2 Manual Fill cap and slowly turn the V2 Manual Fill valve to “Fill”( l ). Install included funnel for easie pouring. Open the V3 Vent valve on the side of the BG PF5HO. This will allow air to escape from the tank while pouring in the transmission fluid and will also make it easy to tell when the system is properly filled.
4. You will need 4 gallons/15 Liters or 3 gallons/11 Liters, or 7 gallons/26 Liters of the appropriate new transmission fluid depending on the tank capacity of the particular unit. Pour transmission fluid into the funnel until a solid stream of fluid runs out of the V3 Vent valve. This signals that the system is completely full and there is no air in the lines. Allow transmission fluid to drain out the V3 Vent valve until the level in the funnel is just below the V2 Manual Fill valve. The transmission fluid captured from the V3 Vent valve is new and can be used for top-off or it can be put back into the new transmission fluid supply container.
5. Turn the V2 Manual Fill valve to “Close”(O) and replace V2 Manual Fill cap or cap the funnel. Remove adaptors.

Recharging is complete. The BG PF5HO is now ready for the next service.

Purging New Transmission Fluid

The following procedure applies to removing new transmission fluid from a fully charged BG PF5HO. This is necessary to charge the unit with a different transmission fluid or to empty the BG PF5HO for maintenance.

1. Attach the #6 open-end adaptor to the end of service hose (H1 or H2) and place end into appropriate receptacle.
2. Locate the Bladder Inverting port inside the unit and attach #19 recharge adaptor.
3. Turn V5 Control lever to “Process”( l ) and the V1 Control lever to “Pressure Release” (PR).
4. Apply shop air into the #19 recharge adaptor until only air is exhausted from the service hose (H1 or H2). (Too much air pressure will cause most of the air to bypass the tank resulting in a mixture of air and transmission fluid to be exhausted.)
5. Turn V1 Control lever 90° to release pressure from the Used Fluid side of unit.

The BG PF5HO is now empty and can be recharged with a different transmission fluid.

Possible Points to Make Connections

1. Crossflow radiator with transmission fluid cooler on side
2. Crossflow radiator with transmission fluid cooler on opposite side
3. Top tank with transmission fluid cooler on bottom
4. External transmission fluid cooler
5. Transmission front wheel drive
6. Transmission rear wheel drive
7. Opposite side

Connection may be made at any accessible point along the transmission fluid route. However, it is possible that the adaptors may not fit every connection encountered.

1. Radiator
2. Transmission
3. External filter
4. External cooler