Burks 1-529-1 Stainless Steel Impeller Cap Screw for G9 series
The Burks 1-529-1 is a replacement impeller cap screw in stainless steel, for G9 series pumps. It is a small part with a specific job, and it is one of the items that most often holds up an otherwise complete rebuild.
The usual reason for replacement is that the old one came out damaged. Corroded threads, a rounded head from a previous removal, or a stud that snapped rather than turned are all routine on a pump that has been in service for years. Reusing a marginal fastener on a joint that has to hold pressure is not a sensible economy.
Follow the Burks torque figures and the tightening sequence rather than working by feel, for G9 series pumps. Even clamping is what makes a gasket seal, and over-tightening a fastener in a cast housing is a quick way to pull a thread out.
Key Features
- Genuine Burks replacement impeller cap screw
- Stainless steel as originally specified
- Correct thread form and length for the joint
- Listed for G9 series pumps
- Chosen for corrosion resistance in the pumped liquid
- Holds its clamping load at the specified torque
Applications
- Burks G9 series pump rebuilds
- Replacing corroded or stretched original fasteners
- Reassembly after an impeller or casing change
- Recovery after a fastener seized or snapped on removal
- Restocking a planned maintenance spares kit
- Industrial, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 1-529-1
- Part Type: Impeller Cap Screw
- Material: Stainless steel
- Fits: Burks G9 series close coupled centrifugal pumps
- Condition: New
Frequently Asked Questions
Q: How do I confirm this is the right one?
Compare thread size, pitch, length and head form against the part you removed, and check it against the parts list for your pump model. Similar is not the same when the fastener is holding a rotating assembly.
Q: Can I use a standard fastener from stock instead?
It will thread in, and that is the problem. The original is specified for corrosion resistance in the liquid the pump handles as well as for strength, and a commercial substitute tends to seize in place and make the next service far harder.
Q: What torque should I use?
The figure in the Burks service literature for that joint. Working by feel is how threads get pulled out of cast housings and how gaskets get pinched, and a torque wrench costs less than either repair.
Q: Should these be replaced as a set?
On a multi-fastener joint, yes. They have all done the same hours in the same liquid, and one tired fastener in a set gives uneven clamping, which is a common cause of a joint that weeps after reassembly.
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 cap screw before you order.
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