Burks 9680-3.13 Brass Impeller 3.13 in
The Burks 9680-3.13 is the genuine Burks replacement brass impeller, 3.13 in diameter, for 3GA5-1-1/4, and the GA5-1-1/4 and GA6-1-1/4 series pumps. The impeller is the one part in the pump that actually adds energy to the liquid: the motor spins it, the curved vanes fling water outward, and the casing turns that velocity into the pressure and flow you read at the discharge.
Replacement is normally driven by lost performance rather than outright failure. Erosion thins the vanes and widens the gap between impeller and casing, and every thousandth of an inch of extra clearance is flow that leaks back to the suction side. A physical strike from debris is the other common reason, since a chipped or bent vane throws the rotating assembly out of balance and puts the shaft seal and bearings under load they were never meant to carry.
The diameter is part of the identity of this part. Burks machines the same casting down to several diameters so one pump family can cover a range of duty points and both supply frequencies, so two impellers can drop into the same casing and still give quite different head and flow. Check the diameter against your parts list before ordering, and confirm that your pump is one of the 3GA5-1-1/4, and the GA5-1-1/4 and GA6-1-1/4 series models.
Key Features
- Genuine Burks replacement impeller in brass
- 3.13 in diameter - the dimension that sets the duty point
- Direct fit for 3GA5-1-1/4, and the GA5-1-1/4 and GA6-1-1/4 series pumps
- Restores the running clearance that erosion opens up
- Returns flow and discharge pressure toward the original curve
- No modification, machining or rebalancing needed
Applications
- Burks 3GA5-1-1/4, and the GA5-1-1/4 and GA6-1-1/4 series pump rebuilds
- Recovering flow and head that have fallen away slowly
- Replacing an impeller with eroded or chipped vanes
- Repairing cavitation pitting on the vane faces
- Restoring balance after a foreign object strike
- Industrial, agricultural, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 9680-3.13
- Part Type: Impeller
- Material: Brass
- Size: 3.13 in diameter
- Fits: Burks 3GA5-1-1/4, and the GA5-1-1/4 and GA6-1-1/4 series
- Condition: New
Frequently Asked Questions
Q: How do I confirm the diameter on the impeller I have now?
Measure across the outside of the vanes at the widest point with the impeller off the shaft. Burks quotes a nominal size, so a reading a few hundredths under is normal on a part that has seen service and does not by itself mean you have the wrong number.
Q: Can I fit a larger diameter to get more pressure?
Only within what the pump and motor were designed for. A bigger impeller draws more power and can overload the motor, raise the axial thrust on the bearings and push the casing past its rating. Stay with the diameter the pump was built around unless Burks lists the larger one for your exact model.
Q: What else is worth changing while the wet end is open?
The casing gasket or O-ring, because it is already disturbed, and the mechanical seal if the pump has any hours on it. The impeller lock screw and washer are cheap and awkward to reach a second time, so most rebuilders replace those at the same time.
Q: Is a worn impeller worth repairing rather than replacing?
On very large pumps with long lead times, weld build-up and re-machining is sometimes done. At this size it rarely pays. Vane profile and balance both have to be restored properly, and the labour costs more than a new part.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct impeller before you order.
CLRMarine
