Stoker gearbox oil for the old cast iron boxes

Stoker gearbox oil for the old cast iron boxes

PostBy: stoker-man On: Sun Jan 01, 2012 5:59 pm

One of the common questions asked at efm was the type of oil to use in the old cast iron efm-manufactured gearboxes. The answer from the company was always 20 weight oil. When we were moving out of Emmaus, I found a new old-stock gallon can of gearbox oil, never opened; picture below. Yesterday, I took a 3oz. sample of the gear oil and an equal sample of 30 weight engine oil and set them on top of my boiler to warm them to the same temperature. Using a viscosity cup for my HVLP spraying unit, I poured 3 oz. of each oil through it. The results were:

3 oz. of efm gearbox oil 106 seconds
3 oz. of 30 weight engine oil 221 seconds

So, the efm gearbox oil is much thinner than the 30 weight oil.

stoker gearbox oil label, old cast iron box.JPG
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stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: franpipeman On: Sun Jan 01, 2012 8:10 pm

Wonderful stoker man , that which we learn through experimentation. ps thanks for you pictorials
franpipeman
 
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Rob R. On: Sun Jan 01, 2012 8:19 pm

What oil did the 60 and 85R stokers use?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: stoker-man On: Sun Jan 01, 2012 9:16 pm

I don't know, Rob. They were antiques when I was a kid. :)
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Pacowy On: Sun Jan 01, 2012 9:45 pm

That fits the pattern, Rob, because I run an 85R, and I was an antique when you were a kid. :lol:

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: McGiever On: Sun Jan 01, 2012 11:30 pm

Might of been whale oil... :angel:
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Rob R. On: Mon Jan 02, 2012 8:31 am

Pacowy wrote:That fits the pattern, Rob, because I run an 85R, and I was an antique when you were a kid. :lol:

Mike


Laugh it up you guys...I was just curious. :P

At moderate temperatures, the viscosity of an SAE 20 engine oil and an SAE 80 gear oil can overlap. Lots of people think the gear oil is thicker because of the higher number, but the grading system was setup that way to keep people from putting gear oil in engine crankcases.

Image
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Wood'nCoal On: Mon Jan 02, 2012 10:12 am

Thanks for the explanation Rob!
JC says to use 75-140 synthetic oil.
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Pacowy On: Mon Jan 02, 2012 1:07 pm

Rob R. wrote: At moderate temperatures, the viscosity of an SAE 20 engine oil and an SAE 80 gear oil can overlap. Lots of people think the gear oil is thicker because of the higher number, but the grading system was setup that way to keep people from putting gear oil in engine crankcases.


Rob -

Thanks very much for the info - it helps to reconcile a lot of the seemingly-conflicting advice I've heard on this subject.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Stoker gearbox oil for the old cast iron boxes

PostBy: Rob R. On: Tue Jan 03, 2012 6:56 am

Wood'nCoal wrote:JC says to use 75-140 synthetic oil.


That would work just fine. Out of all the gear oils on the shelf, 75w140 will have the highest viscosity index. i.e. It resists thickening in cold temperatures and won't thin as much at high temperatures as a 75w90 or 80w90 from the same manufacturer. I think using a synthetic gear oil is a good idea, but I admit that I'm running conventional 80w90 because I have a 5 gallon pail of it in the shop. :)

:idea: More important than the exact viscosity is keeping everything full of clean oil. My stoker is on track to run 1000+ hours this season, and I will include an oil change in the spring service.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy