Western Railroad Discussion > Update on locomotive M&R at OERM (SCRM) 3/2/19

Short report this time! Due to on and off rain Saturday our effort to pull the SP 1006 out and put a quantity of fuel in the tank were thrwarted. That may happen next Saturday but we are, again, facing another wet week here in SoCal.
Our aging fleet of Alcos and military locomotives is beginning to make itself known. Alcos 1956 and 1975 are presenting problems. 1956 is BO due to the fact that its expansion tank has been removed for rebuilding. Carl has cleaned out the tank and will patch the holes prior to the application Rhino Liner. It is hoped that multiple layers of the sealant and water treatment will take care of the leaks for the forseable furture. In addition we have cylinders in both Army Alcos that are not firing properly. It would be good to conduct compression checks on both locomotives but Alco did not make that easy. Each cylinder has a flashcock plug behind the air intake pipe. These plugs are proving to be stubborn about removal. Stay tuned!
Our venerable GE  siderodded 45 ton locomotive (ex Air Force 7441) apparently sheared a key way on the fuel pump drive pulley. This locomotive contains HB series Cummins prime movers with Single Disk fuel pumps--long obsolete. The fuel pump itself has its own issues so it will be challenging to get the #1 engine back in commisson! When it rains--it pours!



Edited 1 time(s). Last edit at 03/04/19 09:37 by TomPlatten.

There are sure challenges but with your expertise it can be done!

thanks for posting the update, Tom!

John

John Acosta
Palm Springs, CA

I rebuilt a Single Disc Cummins pump on the USA 7485, another
ex government 45 tonner, down at PSRM Campo many years ago!

There was a lip between the Fuel and Oil lubricated portions of the
pump housing casting, that had about 1/3 of the lip missing and another
1/4 cracked and ready to break off.

Sent the casting out to a metal spray company and had them remove
the cracked portion and build up and re-machine the lip. The lip was
the bottom of a bearing land on one side and a slinger groove on the other.

No seal in between. With portions of the lip missing or cracked, we were getting
a fuel dilution problem with the engine oil!

The main body of the pump is relatively simple to disassemble/reassemble, the tight
clearances are in the tower portion where the metering disc is located!

Once repaired the fuel dilution problem ended!

I do have a Cummins Single Disc Repair Manual in my collection!

Mike



Edited 1 time(s). Last edit at 04/13/19 17:08 by 2720.