O-235 Vacuum Pump Installation

IowaRV9Dreamer · #1 08-30-2008, 08:31 AM

I have to replace the vacuum pump on my O-325-L2C (the old overhauled one lasted 900 hours). I'm going to get a Rapco pump, likely new since it's only $70 more than overhauled.

Aircraft Spruce also lists the shear coupling and a bushing. Do these come with the pump or do I need to buy them also?

The Lycoming book shows a gasket under the pump and an oil seal. Do these come with the pump (I bet not). Anyone have part numbers for those 2 parts?

Thanks for any help,

rv9av8tr · #2 08-30-2008, 09:40 AM

On the vacuum pps I've replaced, they siezed up inside and that nylon shear coupling is where it "gives". I suppose AS sells the shear coupling separetly for those who want to rebuild their pps. The replacement pps I've bought came ready to bolt on, including gasket.

osxuser · #3 08-30-2008, 10:48 AM

It should come complete. Ours did, and +1 for Rapco new pump, 500+ hours and going strong, no signs of weakening.

IowaRV9Dreamer · #4 08-30-2008, 03:58 PM

Thanks to all - I'll buy the new Rapco pump.

Does anyone have the part number for the "garlock seal" that is on the engine? I'd like to have it handy when I do the pump replacement in case that is the problem.

Thanks,

dave

mahlon_r · #5 08-31-2008, 06:14 AM

Quote:

Originally Posted by IowaRV9Dreamer

Does anyone have the part number for the "garlock seal" that is on the engine? I'd like to have it handy when I do the pump replacement in case that is the problem.

Thanks,

dave

STD-208
Good Luck,
Mahlon