Thank you!
As for air heater I got some thing like this:
Early:
AIR HEATER INSTRUCTIONS
1 TURN ON AIR HEATER SWITCH
2 WITH ENGINE THROTTLE WIDE OPEN
ENGAGE STARTER
3 OPERATE PUMP WITH SMOOTH EVEN
STROKES APPLYING A FIRM PRESSURE
OF 10 POUNDS OR MORE OF PUMPING
STROKE
4 WITH ENGINE RUNNING REGULATE
THROTTLE AND TURN PLUNGER ALL THE
WAY UNTIL LOCK ENGAGES
5 TURN OFF AIR HEATER SWITCH
WARNING
FOR COLD WEATHER STARTING ONLY
Late:
AIR HEATER INSTRUCTIONS
1 TURN ON AIR HEATER SWITCH
2 WITH ENGINE THROTTLE WIDE OPEN ENGAGE
STARTER
3 RELEASE PUMP PLUNGER 1/2 TURN IN COUNTER
CLOCKWISE DIRECTION AND OPERATE PUMP
WITH SMOOTH EVEN STROKES APPLYING A
FIRM EVEN PRESSURE OF 10 POUNDS OR MORE
OF PUMPING STROKE
4 WITH ENGINE RUNNING REGULATE THROTTLE
PUSH PLUNGER IN ALL THE WAY AND TURN
CLOCKWISE UNTIL LOCK ENGAGES
5 TURN OFF AIR HEATER SWITCH
WARNING
FOR COLD WEATHER STARTING ONLY
Another question is about early splithatch cupola.
"Son of Sherman" book says the earliest cupola part number was D51050, if I got it right.
But it seems to me the number on this photo is D51045.
So was the D51050 cupola not the first but the second type actually?
Does anyone know what were part numbers for the hatches of this type of copola or any oher split hatch type? Are there any good examples?
Are there any good references for D51050 cupola, so that the number is visible clearly?