quote:
Originally posted by Unseenthings:
Thanks Rich........ so how much do you guys have left?
I'm guessing this is why 4449 went through the trouble of converting to roller bearing?
You may be a bit confused concerning what I posted above about block grease and roller bearings.
First, since the Southern Pacific RR developed/patented the babbitted crown brass with pressure feed oil lubrication, they saw no need to purchase steam locomotives with roller bearings on all axles. Only two GS class 4-8-4s where purchased by SP with roller bearings on all axles (GS-5 numbers 4458 & 4459). Thus, GS-4 #4449 is STILL equipped with the babbitted crown brass and pressure feed oil lubricated bearings on all four drive wheel axles. However, the engine truck, trailing truck, tender trucks, and auxilary tender trucks have ALL been up-graded to modern cartridge type roller bearings.
Second, the sodium soap based block grease is still manufactured by Battenfeld Grease Co. in New York State & Canada. It is only produced in minimum quantity "batches" of at least 1800 to 2200 pounds, and as Rich stated above it is quite dangerous to produce. This substitute "block grease" has been working for more than 20 years as side rod bearing "pin dope", or "pin grease". The Friends of SP4449 have been pressing this product into round sticks, rolled in powdered graphite, for 4449, the UP steam program, AT&SF 3751, and anybody elso who wants to purchase cases of "ready to use" rod/pin grease.
Third, except for the main drive wheel axle/crown brass grease lubrication system on those steam locomotives so equipped, all the "other" plain bearings are simply oil lubricated journal boxes, very similar to the old freight car trucks of many years ago. Thus, the block grease is NOT used in those types of bearings.