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frank_petran
Member
Username: frank_petran
Post Number: 12
Registered: 05-2009
| | Posted on Monday, May 18, 2009 - 08:33 pm: | 
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Back working on my 4.5R. As this engine is a stationary model it has gear type water pump. The houseing, gears are OK. What isn't is the shaft. I can have another one made up but before that I need to know if the bushing that holds the lower end of the shaft and gear assembly is poured babbit or a bronze oil bushing. This engine is poured babbit and hole is not centered in the casting. I cleaned up the pump flange and the engine flange. I dry fitted the pump with the shaft and it looks like I have to either make a thick gasket for the matting flanges, pour a new babbit bushing or install a oil bushing. It looks like a 1/2 by 3/4 bushing. I can't make out the pump manufacture as some of the lettering is not readable. It starts as M L OBER??RFE? Brass Co, Syacuse. Casting number is 041/2. Any correlation with engine size? As the gear tappered pin was sheared almost flush with the shaft the gear came off with to much of a problem I plan to drill and tap the gear and use a SS set screw to hold it in place. My ultimate goal is to replace the gear drive pump with a plunger type but for now I sill am in need of a flywheel and spacer along with a ignition source. Any help with the water pump question and any source for the flywheel would be great. Thanks |
rbprice
Senior Member
Username: rbprice
Post Number: 245
Registered: 11-2001
| | Posted on Tuesday, May 19, 2009 - 09:10 pm: |
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Hello Frank - the pump is an Oberdorfer, still made in Syracuse, NY. They might have parts for it. They are now owned by Gardner-Denver: phone number is 800.448.1668. They are good pumps and were widely used on old marine engines. |
frank_petran
Member
Username: frank_petran
Post Number: 18
Registered: 05-2009
| | Posted on Friday, May 22, 2009 - 10:59 pm: |
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Back to my water pump. Noticed on one of the many pictures of Grays that the water outlet is piped to a water jacket fitting rather than using the water pump outlet that mates to the water pump mounting flange. Is there any reason for this? There looks like a water jacket inlet/outlet on my engine just below the exhaust flange. Which one is correct or which one is more efficient? Still need to know a little more about the shaft support/bushing as I have started to make a new shaft. |
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