Burks 21181-C Aluminum Bronze Impeller Washer 0.28 by 0.75 by 0.25 in
The Burks 21181-C is a replacement impeller washer in aluminum bronze, 0.28 by 0.75 by 0.25 in, for WA6 and GA series pumps. It is inexpensive, it is inside the pump, and it is the kind of part that turns a routine rebuild into a repeat job when it is left out.
Corrosion is the usual reason to change one. Once the face is pitted, the clamping load is carried unevenly and the fastener will not stay tight, and a fastener that will not stay tight on an impeller is a problem that escalates quickly.
Material and dimensions are both part of the specification. Aluminum bronze is what Burks fitted here, at 0.28 by 0.75 by 0.25 in. A hardware store washer of similar size will not have the same corrosion behaviour or the same thickness, and thickness affects how the fastener loads the parts underneath it.
Key Features
- Genuine Burks replacement impeller washer
- Aluminum bronze as originally specified
- 0.28 by 0.75 by 0.25 in
- Listed for WA6 and GA series pumps
- Inexpensive item that is awkward to reach a second time
- Renew whenever the wet end is opened
Applications
- Burks WA6 and GA series pump rebuilds
- Reassembly after an impeller or seal replacement
- Restocking a planned maintenance spares kit
- Replacing a corroded or distorted original
- Returning a long-service pump to standard specification
- Industrial, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 21181-C
- Part Type: Impeller Washer
- Material: Aluminum bronze
- Size: 0.28 by 0.75 by 0.25 in
- Fits: Burks WA6 and GA series pumps
- Condition: New
Frequently Asked Questions
Q: Can I substitute a standard washer of the same size?
It is not a good idea. The material, the thickness and the surface finish are all part of what Burks specified, and this part sits in a wet, sometimes corrosive location under a clamping load that has to stay constant.
Q: Does this need replacing every time?
Inspect it and renew it whenever the part it works with is being replaced. It is inexpensive, it is inside the pump, and a second strip-down to fit a small part is an expensive way to learn the lesson.
Q: What happens if it is left out at reassembly?
That depends what it does. A missing load-spreading washer lets the fastener bite into softer material and work loose, while a missing slinger lets escaping liquid run along the shaft into the motor. Neither is worth the risk.
Q: How do I fit it the right way round?
Note the orientation of the old one before it comes off, and follow the Burks assembly sequence. Some of these parts have a chamfer or a dished face that belongs against a specific component.
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 washer before you order.
CLRMarine
