Robbins & Myers 630-0502-031 Ball Bearing for Moyno 500 Models 331 to 344
The 630-0502-031 is the ball bearing used on the drive shaft of the Moyno 500 Models 331, 332, 333 and 344, in the 203 frame size. Bearings of this type are fitted two per pump and they carry both the radial load from the drive and the thrust the pumping element generates along the shaft.
Listen and feel rather than guess. A tired bearing rumbles at running speed, feels rough or notchy when the shaft is turned slowly by hand, and often runs warmer than the rest of the drive end. Any one of those is reason enough to replace it, because a bearing that fails in service can let the shaft move enough to destroy the seal and the joint with it.
Key Features
- Replacement ball bearing for the Moyno 500 drive end
- 203 frame size
- Fitted two per pump
- Matched to the Moyno 500 Models 331, 332, 333 and 344
- Restores true shaft alignment so a new seal can run concentric
- Direct replacement, no machining required
Applications
- Moyno 500 Models 331, 332, 333 and 344 progressing cavity pumps
- Replacing a bearing that rumbles, feels notchy or runs hot
- Rebuilding a drive end after a shaft seal leak
- Full overhaul alongside shaft, seal and slinger
- Planned maintenance on continuously running pumps
- Industrial, marine, dockside and washdown installations
Specifications
- Brand: Robbins & Myers
- Manufacturer: Robbins & Myers (Moyno)
- Manufacturer Part Number: 630-0502-031
- Part Type: Ball bearing, drive shaft
- Size: 203 frame size
- Quantity Used: Two per pump
- Fits: Moyno 500 Models 331, 332, 333 and 344
- Condition: New
Frequently Asked Questions
Q: How often should they be replaced?
There is no fixed interval. Condition decides it, so a bearing that runs silent and smooth is doing its job, and any roughness or rumble is the signal to change it.
Q: What should be checked at the same time?
The shaft journals for scoring, the slinger for hardening, and the shaft seal for any sign of weeping, since a leaking seal is the most common reason a pump bearing fails early.
Q: Should both bearings be changed together?
Yes. They have run the same hours under the same conditions, and mixing a new bearing with an old one leaves the tired one setting the service interval for both.
Q: Do they need packing with grease before fitting?
Sealed bearings arrive greased and should not be opened. Where the build uses shielded bearings and a grease fitting, follow the lubrication instructions for your pump rather than overfilling, since too much grease runs a bearing hot.
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 ball bearing before you order.
CLRMarine
