Burks 9740-1 Cast Iron Adapter for WA6 models except the 10WA6
The Burks 9740-1 is a replacement adapter in cast iron, for WA6 models except the 10WA6 pumps. Everything about how the pump runs - seal life, impeller clearance, vibration - depends on the alignment this casting holds.
The usual reason for change is corrosion around the seal chamber after a long-running leak. Liquid that has been weeping past the mechanical seal sits in the adapter and eats into the casting, and once the seal bore is pitted the new seal has nothing clean to seat against. Damaged register faces and stripped threads account for most of the rest.
Check the register and the seal bore on the new casting before assembly, and clean the motor face properly. This adapter is the Burks original on WA6 models except the 10WA6 pumps, and the whole point of it is to hold alignment - which it can only do against clean, undamaged faces.
Key Features
- Genuine Burks replacement adapter
- Cast iron construction as originally supplied
- Original mounting and register dimensions
- Listed for WA6 models except the 10WA6 pumps
- Holds the casing concentric with the motor shaft
- Houses the stationary half of the mechanical seal
Applications
- Burks WA6 models except the 10WA6 pump rebuilds
- Replacing a seal chamber corroded by a long-running leak
- Repairing damaged mounting faces or pulled threads
- Curing repeated premature mechanical seal failure
- Rebuilding a pump onto a replacement motor
- Industrial, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 9740-1
- Part Type: Motor adapter
- Material: Cast iron
- Fits: All Burks WA6 models except the 10WA6
- Condition: New
Frequently Asked Questions
Q: Should the mechanical seal always be renewed with the adapter?
Yes. The seal has to come out to change the adapter, and refitting a used mechanical seal onto a different seat almost guarantees a leak.
Q: How do I find the motor frame size?
It is stamped on the motor nameplate, usually as a number followed by JM or JP on close coupled pump motors. That designation sets the shaft extension and the mounting face, which is exactly what the adapter has to match.
Q: Can a pitted seal bore be sleeved instead of replaced?
It is done, but it needs accurate machining to keep the bore concentric with the motor register. Unless the adapter is hard to obtain, a new casting is usually quicker and removes the alignment risk entirely.
Q: What should I check before bolting it up?
Clean both register faces back to bare metal, check the motor shaft for a groove where the old seal ran, and make sure no gasket debris is trapped on the mating surfaces. A thousandth of grit on a register is enough to throw the alignment out.
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 adapter before you order.
CLRMarine
