Weinman 135654 Adapter Kit 12 in R - 280/320 Frame, 375 and 575 Series
The Weinman 135654 is the genuine Weinman adapter kit for 12 in R casing, 280 and 320 JM motor frames, used on 375 and 575 Series back pull out pumps. The adapter is the structural bridge between the casing and the driver: it bolts to the motor face or the bearing frame, carries the casing, and holds the stationary half of the mechanical seal square to the shaft.
Because the adapter sits between the wet end and the driver, it gets the worst of both worlds - pumped liquid on one side, vibration and clamping load on the other. Flange faces get levered, threads get stripped by repeated strip-downs, and eventually the casting no longer holds alignment to the tolerance the seal needs.
Three things identify this kit - the casing group, the driver frame, and on some sizes the motor pole count. This one covers 12 in R casing, 280 and 320 JM motor frames. The pump nameplate gives the model and casing size, and the motor nameplate gives the frame.
Key Features
- Genuine Weinman factory adapter kit
- 12 in R casing, 280 and 320 JM motor frames
- Supplied with the mounting hardware for the joint
- Holds the casing concentric with the shaft
- Houses the stationary half of the mechanical seal
- For Weinman 375 close coupled and 575 frame mounted pumps
Applications
- Weinman 375 and 575 Series back pull out pump repair
- Replacing a seal chamber corroded by a long-running leak
- Repairing damaged register faces or pulled threads
- Curing repeated premature mechanical seal failure
- Rebuilding a pump onto a replacement motor or bearing frame
- HVAC, commercial building, municipal and industrial systems
Specifications
- Brand: Weinman
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 135654
- Part Type: Adapter kit
- Size: 12 in R casing, 280 and 320 JM motor frames
- Fits: Weinman 375 and 575 Series back pull out pumps
- Condition: New
Frequently Asked Questions
Q: Should the mechanical seal always be renewed with it?
Yes. The seal has to come out to change the adapter, and refitting a used seal onto a different seat almost guarantees a leak within weeks.
Q: What should I check before bolting it up?
Clean both register faces, check the shaft for a groove where the old seal or sleeve ran, and make sure no debris is trapped on the mating surfaces. A thousandth of grit on a register is enough to throw the alignment out.
Q: Where do I find the motor frame size?
It is stamped on the motor nameplate, usually as a number followed by JM on close coupled pump motors. That designation fixes the shaft extension and the mounting face, which is exactly what the adapter has to match.
Q: Does the number of motor poles really change the part?
On the sizes where Weinman lists separate two pole and four pole kits, yes. The higher speed driver is built differently and the adapter has to suit it, so a kit that looks right by casing size alone can still be the wrong one.
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 kit before you order.
CLRMarine
