Burks 9912 Cast Iron Adapter for G6 series
The Burks 9912 is the genuine Burks cast iron adapter for 143JM to 184JM motor frames, used on G6 series pumps. On a close coupled pump the adapter is the structural link between motor and wet end: it bolts to the motor face, carries the casing, and holds the shaft seal in exact alignment with the shaft.
A cracked or distorted adapter puts the shaft off centre, and the parts that complain first are the mechanical seal and the bearings. If seals are failing far sooner than they should, checking the adapter bore and the register faces is a more productive line of enquiry than fitting another seal.
Motor frame size is what identifies this adapter. This one is machined for 143JM to 184JM motor frames. Burks builds different adapters for different frames within the same pump family, so check the frame designation stamped on the motor nameplate as well as the pump model; this part is listed for G6 series.
Key Features
- Genuine Burks replacement adapter
- Cast iron construction as originally supplied
- 143JM to 184JM motor frames - matches the motor frame
- Listed for G6 series pumps
- Holds the casing concentric with the motor shaft
- Houses the stationary half of the mechanical seal
Applications
- Burks G6 series 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: 9912
- Part Type: Motor adapter
- Material: Cast iron
- Size: 143JM to 184JM motor frames
- Fits: Burks G6 series close coupled centrifugal pumps
- Condition: New
Frequently Asked Questions
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.
Q: Does the adapter affect impeller clearance?
It does. The adapter sets the axial position of the casing relative to the motor shaft, so the front clearance at the impeller depends partly on it. That is why gasket thickness at this joint is not something to improvise.
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
