Impeller replacement Cat 3126

I like to pull that beam and engine exhaust to get to the generator's raw water pump but don't really need to for the Stbd engine's; just the exhaust for the engine's impeller. But I usually like to do both as well as the generator's fuel filter when I need to get in there.
Rather than bedding the beam in sealant I use EPDM foam rubber; water seems to stay out just fine and can easily remove the beam any time. http://www.mcmaster.com/#standard-foam-sheets/=125tjcb
 
All I did was cut through the silicone with a razor knife. It's still there but will not seal it very well. I like the idea of the pad that ttmott mentioned. I may need to look into that! The only real water I get in the cockpit is from my hose since I have full canvas with wall to wall Infinity Carpet.
 
Hmmmm I thought that I tried to put the extraction bolt in the new impeller to test but maybe not. Can you confirm that there are no other bolts to remove other than the 3 for the cover (no set bolts or retainer bolts on the impeller case for instance)? And you don't have to remove the pump from the engine first?

thanks

Dave
 
Confirmed, no other fasteners. Sometimes if the impellers sit they will stick a bit. put a wrench on the bolt and crank it out.
 
I bumped the engines so the were definitely freed up and further dumped some wd40 into the vanes to no avail. I only tried the easy stbd unit. Maybe this weekend I will try the port.

The bolt definitely ground down and would not turn further. It is hard to believe that the threads were wrong. It definitely felt like it was threading properly. The first couple of threads on the extraction bolt actually disintegrated a bit.

dave
 
David - definitely try your bolt in a new impeller. My extraction bolt has a "T" handle and it screws right in and with just hand turning, pulls it out...
 
Carter your description of the t handle tells me how easy it should be. I am starting to wonder if the key has somehow jammed in the impeller.

thanks

Dave
 
david_h said:
I bumped the engines so the were definitely freed up and further dumped some wd40 into the vanes to no avail. I only tried the easy stbd unit. Maybe this weekend I will try the port.

The bolt definitely ground down and would not turn further. It is hard to believe that the threads were wrong. It definitely felt like it was threading properly. The first couple of threads on the extraction bolt actually disintegrated a bit.

dave
Click to expand...

I think also you have a problem. It should have slid right out. Agree, need to pull the pump out. Pump is a Sherwood P1732C and is held on the engine with two bolts; one of the bolts is through to the front cover with a nut. If the pump drive shaft is boogered up you may have to consider a major repair kit or new pump. Here is the Depco Catalog, look on page 114. http://www.depcopump.com/catalogs.php
 
David - you might try tapping it with a hammer to see if that will break it loose. Try to tap it on the end of the impeller and maybe there would be enough movement into the housing to break it loose.
 
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