Roper Pump G5-258 Short Bronze Bearing for 3611 to 4722
The Roper G5-258 is the short bronze sleeve bearing for 3600 Series pumps in the 11, 17 and 22 sizes, covering the 3611 through 4722 range. It is the shorter of the two sleeve bearing lengths these pumps use, and it works as a set with the long bearing to give each gear shaft support at both ends. Four bearings in total carry the pumping gears, and the running clearance they hold is a direct contributor to how much liquid the pump slips back at pressure.
Bronze is the standard here because it tolerates marginal lubrication better than harder materials and gives up its dimension gracefully instead of seizing. High lead bronze is rated to roughly 400 degrees Fahrenheit in this service, and Roper offers iron for abrasive product and carbon for thin non-abrasive liquids where bronze is not the best match. The practical test at teardown is simple: if a new shaft has any perceptible rock in the old bearing, the bearing is finished. Replace them as a set, check the shafts for the fine polished band that says a bearing has been running dry, and dress or renew any shaft that has started to score.
Key Features
- Genuine Roper Pump Company sleeve bearing, part number G5-258
- Short bearing for the 3611 through 4722 pump frames in the 11, 17 and 22 sizes
- High lead bronze for tolerance of marginal lubrication
- Grooved to let the pumped liquid lubricate and cool the bearing face
- Works as a matched set with the long bearing on the same shaft
Applications
- 3600 Series heavy duty gear pumps in sizes 11, 17 and 22
- General purpose transfer, blending and recirculation
- Fuel oil, gasoline and solvent handling
- Oil field, refinery and process plant duty
- Planned pump overhaul and bearing renewal
Specifications
- Brand: Roper Pump Company
- Part Number: G5-258
- Part Type: Sleeve bearing, short
- Material: High lead bronze
- Fits: 3600 Series 3611 through 4722
- Bearing Count: 3600 Series pumps carry four sleeve bearings in total, two per gear shaft
- Condition: New
Frequently Asked Questions
Q: Can I fit long bearings in all four positions?
No. The positions are machined to different depths and the long bearing will stand proud where a short one belongs, which closes the end clearance and can lock the pump.
Q: How much clearance should there be between shaft and bearing?
Work to the figure given for your frame rather than to a rule of thumb, and measure with the bearing pressed into its bore, since a sleeve bearing closes up slightly once it is installed.
Q: Why do bearings fail early on thin liquids?
Thin product carries less load and drains away faster, so the film between shaft and bearing is thinner. That is the situation Roper offers carbon bearings for.
Q: Is a discolored bearing always scrap?
Heat staining means the bearing has run hot and lost its temper and fit, so yes. Find out why it overheated before the replacement goes in.
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 short bronze bearing before you order.
CLRMarine
