M.T.H. Premier ES44AC Operator's Manual page 19

After removing the engine from storage, add another 25 drops of fluid, letting the
wick soak up the fluid for 15 minutes prior to operation.
If you experience poor or no smoke output when the smoke unit is on and has
fluid, check the wick to see if it has become hard, blackened, and unabsorbent
around the heating element. After removing the locomotive body from its chassis,
remove the smoke unit inspection cover. After removing the inspection cover
screws, lift the inspection plate away and inspect the wick. If it is darkly discolored
and hard, it should be replaced.
Replacement parts and wick replacement instructions are available directly from
the M.T.H. Parts Department (Order online: www.mth-railking.com, e-mail:
parts@mth-railking.com,Fax: 410-423-0009, Phone: 410-381-2500, Mail: 7020
Columbia Gateway Drive, Columbia MD 21046-1532, ).
Inspecting the Smoke Unit Wick
ProtoSmoke™ Fluid
ProtoSmoke™ is the recommended fluid for M.T.H.
products and can be used in other manufacturers products
as well. Choose from 12 different scents:
Christmas, Coal, Diesel, Wood Burning, Coffee, Eggs &
Bacon, Vanilla, Candy Cane, Barbeque, Pipe Smoke,
Cinnamon Roll, and Apple Pie
Premier ES44AC Diesel Engine with PS-2 and Proto-Scale 3-2
Smoke Unit
Inspection Cover
Screws
19