Cummins/Onan Spec J — The assembly torques shown

For the Cummins/Onan Spec J.

Procedure

Shut off the fuel supply at the tank and allow the unit to run until it stops from lack of fuel. The fuel system will then be free of gaso- line except for the tank. If the fuel tank will be subjected to temperature changes, fill the tank nearly full to lessen chances of condensation forming within the fuel tank.
Drain the oil from the oil base while the engine is warm. Replace the drain plug. See that the oil fill cap or plug is in place.
Remove each spark plug and pour two tablespoonfuls of rust inhibi- tor oil (Use SAE-50 motor oil as a substi tute) into each cylinder. Crank the engine over slowly by hand to lubricate the cylinders. Stop the engine with the TC (top center) mark on the flywheel indicating at least one piston is at top center position. Replace the spark plugs.
Remove, clean and replace the air cleaner per instructions under Periodic Service.
Wipe all exposed parts clean and coat with a film of grease all such parts liable to rust.
Oil the governur to carburetor linkage with SAE 50 oil.
Plug the exhaust outlet with a wood plug to prevent entrance of mois- ture or foreigi: matter.
Clean the generator brushes, brush holders, commutator and col- lector rings by wiping with a clean cloth. Do not coat with lubri- cant or other preservatives.
Where batteries are likely to be exposed to freezing temperatures, they must be removed and stored where there is no danger of freez- ing. A fully charged battery can withstand very low temperatures but an idle battery gradually loses its charge and may become discharged to the point where it will freeze. An idle battery should be given a freshening charge about or 49 days. If battery is not to be removed, disconnect the cables from the unit. STORAGE 03 Arrange the cables so that the lugs c
Provide a suitable cover for the entire unit, particularly if it will be exposed to the elements. RETURNING THE UNIT TO SERVICE
Remove all protective coatings of grease from external parts. Wipe the entire unit clean of accumulated dust or other foreign matter.
Inspect the unit carefully for damage and for other conditions re- quiring attention. Service as needed.
Remove the plug from the exhaust outlet.
Remove, clean and adjust spark plugs. While the plugs are out, crank the engine over several times by hand to distribute oil over the cylinder walls. If the cylinders are dry, put a tablespoonful of oil into each cylinder and crank the engine several turns by hand to distribute the oil. Replace the spark plugs and paskets. >. Examine all fuel and oil connections. Service as needed.
Refill the crankcase with the correct amount and grade of oil.
Lubricate governor linkage ball joint with powdered graphite.
Check carefully for leaks of fuel or oil after servicing the unit. Correct any leaks before starting the unit.
Connect the battery cables to unit. Carefully recheck to make sure the unit is ready for operation. Then start the unit in the regular manner as described under OPERATION. 54 PARTS CATALOG The CW series generating plant models covered by this parts catalog have their SPEC NO. listed in the first column of the following chart. The nameplate attached to the plant identifies the plant. Always furnish the MODEL and SPEC NO. and the SERIAL NUMBER with each inquiry. Unless otherwise stated in the
x an 4 1338 ee x x x
x x x 1991 x x x . x f[ x 2148 J x ls x x ZB}. x 2203 J x {| x |x Ad x 2206 f Se] |. x_ dx. x x 2217 Same as Spec 1776 except painted blue color. 2428 x x | x | x | x | x 2537 fox J ox fox |x x x | x INSTRUCTIONS FOR ORDERING 99 REPAIR PARTS FOR PARTS OR SERVICE, CONTACT THE DEALER FROM WHOM YOU PURCHASED THIS EQUIPMENT OR REFER TO YOUR NEAREST AUTHORIZED SERVICE STATION. TO AVOID ERRORS OR DELAY IN FILLING YOUR PARTS ORDER, PLEASE FURNISH ALL INFORMATION REQUESTED. REFER TO THE ENGINE
Always give the MODEL AND SPECIFICATION NO. SERIAL NO.
State definite shipping instructions.
Give the part number, description and quantity needed of each item. Do not order by reference number or group number! If an old part can- : Sse vt: not be identified, return the part pre- NEAPOLIS, MINN paid to your dealer or nearest @ eeae © Dee see AUTHORIZED SERVICE STATION. aes Print your name and address plainly on the package. Write a letter to the same address stating the reason for returning the part. Any claim for loss or damage to your unit in transit should be filed promptly agains

Source: manual:920-1010 Onan CW (spec E-J) Genset Instruction and Parts manual (03-1962).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.