Cummins/Onan PX12000 Generator Set

⚠ If the RESET button pops out during operation, stop the generator immediately and call a qualified electrician.

1. Push the blue TEST button; the red RESET button will pop out exposing TRIP.
2. Power is off at the protected outlets, indicating the GFCI is functioning properly.
3. If TRIP does not appear, do not use the generator; call a qualified electrician.
4. Push RESET to restore power.

⚠ Do not touch output terminals while the generator is running.

1. Shut down the generator before connecting or changing power cables.
2. For three-phase 208V, insert the plug into receptacles X, Y, and Z.
3. For single-phase 120V, insert the plug into W and X, W and Y, or W and Z.
4. Maximum one-third of generator output can be utilized from each phase.

⚠ Disconnect battery cables when charging battery.

⚠ Turn the starter switch to the STOP position when mounting or dismounting battery.

⚠ Connect positive (+) terminal first when mounting, disconnect negative (-) terminal first when dismounting.

1. Attach terminals to a lead-acid battery already charged and mount it with its terminals facing inward.
2. Insert each long bolt through the specified hole, its tip pointing outward.
3. Put the supporting arm on the long bolts and tighten with the butterfly nuts.
4. Arrange the wiring so that it won't be damaged by engine vibration.
5. With the starter key in the OFF position, connect the red cable to the positive (+) terminal, then the other cable to the negative (-) terminal.

⚠ All connections must be made by a licensed electrician.

⚠ Failure in connection may result in death, personal injury, damage, or fire.

1. Take generator output power from the 240V-4P receptacle.
2. Install a transfer switch between the meter and the fuse or AC breaker box.
3. Ground the generator ground terminal if the house neutral wire is grounded.
4. Turn the house AC breaker off before starting the generator.
5. Start the generator and warm it up.
6. Turn the house AC breaker on.

⚠ All connections must be made by a licensed electrician.

⚠ Failure in connection may result in death, personal injury, damage to generator, damage to appliances, damage to building's wiring or fire.

⚠ Do not connect the generator to a commercial power line.

1. When connecting the generator to house wiring, take generator output power from the 240V-4P receptacle.
2. Install a transfer switch of the correct capacity between the meter and the fuse or AC breaker box.
3. If the neutral wire of house wiring is grounded, be sure to ground the ground terminal of the generator.
4. Turn the house AC breaker off before starting the generator.
5. Start the generator and warm it up, then turn the house AC breaker on.

Tools: Hoist or square bar (4 in by 4 in, length 27.6 in), Plier, Spanner or socket wrench (12mm), 2 units

1. Raise the generator by about 4 inches with a hoist or with a square bar put under the bottom panel.
2. Attach wheel mounting parts, stopper and wheel to the wheel shaft using the clamp; check the wheel rotates smoothly (use grease if needed).
3. Bend the tip of the part according to the shape of the wheel shaft as possible.
4. Attach the assembled shaft to the foundation plate of the engine.
5. Attach the other shaft to the foundation plate of the generating unit.

1. Remove the brush cover.
2. Disconnect the wire connector and remove the brush.
3. Replace the brush with a new one if it is 5 mm (0.2 in.) long or less.
4. Note the brush direction and relative position with the slip ring and install the new brush correctly.

⚠ Gasoline is flammable; do not smoke or use open flame.

1. Remove the strainer cup and throw away water and dirt.
2. Clean the screen and strainer cup with gasoline.
3. Tightly fasten the cup to main body, making sure to avoid fuel leak.

Tools: supplied plug wrench and handle

1. Unplug the high-voltage cables.
2. Using the supplied plug wrench and handle, turn the plug counterclockwise until it comes off.
3. Clean the area around the mounting hole and clean the electrodes if dirty.
4. Adjust the clearance to 0.03 in. (0.7-0.8 mm); replace the plug if the projection is worn flat.
5. Attach and tighten the plug to 25 to 30 Nm (19 to 22 lbs/ft).
6. Check the plug cap contact area for corrosion and connect the high-voltage cables.

⚠ Check for a suitable way to dispose of old oil; do not pour into sewage drains, garden soil or open streams.

1. Stop the engine and place generator on a stable and level surface.
2. Loosen the drain plug and drain the oil.
3. Re-install the drain plug before refilling oil.
4. Refill with recommended oil to the upper level.

⚠ Pay attention to spilled hot engine oil when replacing the engine oil filter.

Tools: wrench

1. Drain the engine oil.
2. Apply oil to the new oil filter O-ring.
3. Attach the oil filter in position and tighten 2/3 turns by hand or with wrench after the O-ring touches the sealing surface.
4. Run the engine for a minute, stop the engine and check for oil leakage around the oil filter.
5. Recheck the oil level.

⚠ NEVER USE WATER TO CLEAN GENERATOR.

1. Drain fuel from fuel tank and strainer cup carefully by disconnecting the fuel line.
2. Run the engine at no-load until it stops to remove fuel in the carburetor.
3. Disconnect the terminal of the battery.
4. Change engine oil.
5. Check for loose bolts and screws, tighten them if necessary.
6. Clean generator thoroughly with oiled cloth; never use water to clean generator.
7. Store generator in a well ventilated, low humidity area.