water pumps with a maximum shaft power of 150kW) ... 8.2 Checking rotation direction ... Do not operate the pump with a motor that has a different power except for the given catalog and label values. Therefore the blades should point to the left or counterclockwise. Bi-rotational pumps can flow out of either port, but only when rotation reverses. Upon restoration of power, the UDS1000 relay resets but would instantaneously switch out again if it detected a shaft reversal, thus preventing the pump motor from starting during a reversal condition. Rotation is indicated on the head of the pump, you’ll see an arrow going counter-clockwise. In most cases it doesn't matter because they will flip once the engine is started. Water flows the same direction through the motor as a 'standard' pump, the pump impeller is different. Reverse Rotation means that the direction of the rotation of the Impeller is reversed. When mounting a pump with belts and pulleys, either pump rotation can be used to match the drive shaft rotation and the desired direction of the pump. The water pump is used on other 350 motors. I have found the Elderbrock and other performance water pumps have reverse rotation. Most OEM serpentine belt drives use reverse rotation but still pump the cooled water into the block first. While being a fundamental motor installation task, determining rotation direction is critical to the coupled load's operation. It will do so at much lower than normal torque. When referring to a water pump, it's reverse rotation that you need to pay attention to. I am trying to verify the proper water pump for the truck. I have seen it in person on a canadian '86 cutlass with a 305 engine. That takes care of the proper orientation. Step 4) Check the load in case it indicate direction of rotation because in pump application sometimes arrow indicated on pumps too. The vibration data were collected and Direction of Rotation (DOR) was checked and found that the problem is with DOR. Equipment/function The indicator gets the energy from the motor stray field. In order to check fan whether it is directional or bi directional, check in which direction you get air output from enclosure. Chevrolet Performance offers Water Pumps and other Accessory Drive Systems for your Small-Block engine build or project car. This patent addresses a need to be able to tell in which direction of rotation an electric motor is turning when connected to a pump, and in particular, a submersible pump where the direction of the motor shaft is not installed where visual observance of the direction of rotation is possible. They will be "dragged" around so they do NOT point in the direction of rotation. John A. DeDad. This video shows what reverse rotation water pump will fit on a standard rotation timing chain cover. The back (smooth) side of the belt is routed around the water pump pulley, thereby rotating it in the oposite direction of the crankshaft. I need to change to a standard-rotation water pump. A great way to test reverse rotation on site if you can't see the shaft - do the shut off differential pressure test (or which ever shut off head pressure is higher that is the correct rotation). I am replacing my water pump on a 1989 5.0L EFI HO engine and see there are two different water pump rotation options for the 5.0L/302 - Counter clockwise and clockwise. I want to comment on the SBC water pump topic, there does exist a standard rotation water pump setup with a serpentine type belt. Draw a center line down through the motor coupling and gear shaft. When liquid enters the center or eye of the impeller it is subjected to centrifugal force that moves the liquid towards the discharge port on the pump. You've just had a motor repaired or purchased a replacement, and you're about to connect it. In that case the sheave would rotate so that air flow generated would blow over the pump, cooling it. One means is to make an electric connection to the motor before it is mechanically connected to the load. It had a serpentine belt going around the crank, water pump and … Re: Impeller Rotation DIrection Significance? Step 3) If load is pump, check in which direction you get desired flow rate. The path for liquid to … Centrifugal pumps, whether submersible or not, are designed for the most part to operate in one direction only. This set-up will interchange between the 5.0 and 5.8 and since, unless I am reading this wrong, you have the correct combination your heating problem is probably caused by something else. Each motor label will have a wiring diagram, if motors are reversible the instructions on how to change direction are provided on the motor label. Most centrifugal pumps have an arrow indicating the proper rotation direction located either on the pump body or on the motor. The only practical reason for doing this is to attempt to free a sand locked pump. The 5.0 does not care which water pump it has as long as it has the correct timing cover (to match the pump) and the pump is turning the right direction, it sounds like yours is correct. We can determine what direction the pump must turn Look at the pump from the inlet side. All pumps or motors are labeled with rotation stickers to show the proper direction of rotation. The clockwise water pump I belive would be used on the V-Belt setup and the counter clockwise would be used on the S-Belt. The rotation setting of a centrifugal pump, motor, transmission or PTO is determined by viewing the device from the shaft side. If pump rotation direction changes then its effect on pressure & discharge.Rotation direction changes means that the direction of the rotation of the Impeller is reversed. How much less, us pump manufacturers don't know (we don't test em running backwards). If the pump motor rotates in the direction opposite that indicated on the pump, reverse any two wires in the supply to change the direction of rotation. Reverse rotation water pumps turn in the oposite direction of the crankshaft and are typically used with surpentine belts. Notice that it is offset. Jun 01, 1996. An interesting case came when one of the vertical multi-stage boiler feed water pumps was not developing the pressure and was having high abnormal sound from the start-up after a motor overhauling. If you swap the red and black (start and run) wires the motor will reverse. The direction indicated depends on the reference (e.g. Does anyone know what the correct roatation that is needed for my application. a REVERSE ROTATION pump in a serpentine setup still pumps water in the same diection. View performance parts today. viewing) direction, which must also be specified (typically towards the drive or direction of inflow). The direction of rotation can then be tested by briefly putting power to the motor prior to it’s connection to the load. So, if it were my air compressor, and if, for some reason, I had a motor with a shaft that was rotating in the opposite direction, I would not worry about changing the motor rotation. Reverse Rotation. The direction of motor rotation can be figured out in two standard ways. If you turn the motor around and look at the backside and remove the cap, you’ll see a shaft located in the center. Our pump is designed around running clockwise, same as the old school V8 you always knew and loved.