Kubota 2403T Engine

1. On the Pressure Regulator, loosen the jam nut and turn screw counterclockwise until tension is no longer felt; then turn screw clockwise one full turn.
2. Close service valve(s).
3. Inspect throttle arm on engine governor to see the arm is resting against the governor stop; turn cylinder rod until throttle arm is against the governor stop.
4. If equipped, push the SERVICE AIR button; unit should speed up and unload; turn pressure regulator adjusting screw clockwise until discharge pressure gauge indicates 125-130 psi; tighten jam nut.
5. With the service valve closed, adjust IDLE speed using adjusting rod; tighten jam nut.
6. Open the service valve and adjust the discharge pressure to 100 psi (700 kPa); turn adjusting rod until proper engine FULL speed setting is reached; tighten jam nuts.
7. To obtain maximum CFM at any pressure between 80 psi (550 kPa) and maximum pressure rating, adjust the pressure regulator to obtain desired discharge pressure at FULL engine speed.

Tools: Ratchet, 13mm socket to fit ratchet, Torque wrench set to 68 foot pounds (9.4 kg-meters), 16mm socket to fit torque wrench, 5 inch extension for torque wrench

1. Remove hardware box from compressor toolbox and open.
2. Using the jack, raise the front of the unit so legs are approximately 1 inch above ground.
3. Remove the temporary retaining bolts from both sides of the frame at the drawbar connection.
4. Carefully lower drawbar to the Level Position.
5. Install the four bolts (with pre-applied thread lock) to the four points inside the enclosure and torque to 68 ft. lbs. (9.4 kg-m).
6. Install safety chains by sliding the second link of one chain into the slot in drawbar plate; fasten chain with taptite and washer; repeat for other chain.
7. Temporarily support drawbar and move jack from front of compressor to side of drawbar.

⚠ High pressure air can cause severe injury or death from hot oil and flying parts. Always relieve pressure before removing caps, plugs, covers or other parts from pressurized air system.

1. Open the service air valve(s) to ensure the system is relieved of all pressure; close the valve(s).
2. Turn the spin-on filter element counterclockwise to remove it from the filter housing; inspect the filter.
3. Inspect the oil filter head to be sure the gasket was removed with the oil filter element; clean the gasket seal area.
4. Lubricate the new filter gasket with the same oil being used in the machine.
5. Install new filter by turning the element clockwise until gasket makes initial contact; tighten an additional 1/2 to 3/4 turn.
6. Start unit and allow to build up to rated pressure; check for leaks before placing unit back into service.

Tools: lint free cloth, squeegee, pin

1. Wipe decal area with 70% isopropyl alcohol and a lint free cloth in a well ventilated area.
2. Allow sufficient time for drying.
3. Align decals prior to removing the backing.
4. Peel one section of backing and squeegee decal from center to edges to remove air.
5. Remove the remaining backing and repeat squeegee process.
6. Repeat squeegee over entire decal surface; allow 24 hours for permanent bond.
7. Remove air bubbles by pricking bubble center with a pin and squeegee air toward the hole.

1. Ensure the tank pressure is zero.
2. Unscrew separator element from manifold.
3. Lubricate gasket with compressor oil.
4. Install new element.

1. Check oil level; maintain as indicated earlier in this section.
2. Thoroughly clean scavenge line, any orifice and check valve.
3. Assure minimum pressure valve/orifice is operational.
4. Run unit at rated operating pressure for 30 to 40 minutes to permit element to clear itself.

1. Loosen the 3 latches on the sides of the air cleaner cover.
2. Remove air cleaner body.
3. Pull out air cleaner element.
4. Pull out safety element if installed.
5. Install new filters in air cleaner body.
6. Re-install cover on air cleaner body.
7. Close the 3 latches after securing to air cleaner body.
8. Make sure all clamps and flange joints are tight.
9. Make sure the pre-cleaner dirt dump is pointed within 30 degrees of down.

⚠ Failure to follow these instructions CAN cause severe injury or death.

⚠ Always raise (or remove) jack for maximum ground clearance before towing.

1. Assure tow vehicle has towing capacity for weight of this unit as stated on general data decal.
2. Position the tow vehicle to align its hitch with the pintle eye or coupler of the compressor.
3. Engage the parking brake and chock the tires of the tow vehicle.
4. Stand to the side and ensure pin is FULLY inserted (secure) in tube of jack.
5. Crank jack to seat pintle eye or coupler onto hitch; latch and lock hitch; cross safety chain(s) under drawbar; attach to vehicle.
6. Crank jack to raise pad off the ground; pull pin from tube of jack.
7. Fold jack handle down and forward; swing up jack tube and FULLY insert pin in tube.
8. Remove tire chocks.
9. Test brakes, if so equipped.
10. Test lights (running, stop, and turn signals).

1. Turn power switch to the glow plug position and hold 10 seconds.
2. Then turn to start.

1. Turn the POWER switch to ON.
2. Turn Power switch to START position to crank engine; hold in START approximately 5 seconds after engine starts.
3. Release Power Switch (it will automatically move to ON) when engine starts and sustains running.
4. Allow engine to warm up 5 to 10 minutes.
5. If so equipped, press the Service Air Button; open air service valve(s).

⚠ Since the service valve is closed, air downstream of the valve may be trapped. Do not disconnect hoses until all pressure has been vented.

1. Close air service valves.
2. Allow the unit to run at idle for 3 to 5 minutes to reduce the engine temperatures.
3. Turn Power Switch to OFF position.
4. When the engine stops, automatic blowdown valve should relieve system air pressure; if malfunction suspected, open manual blowdown valve.
5. Never allow unit to sit under pressure when engine is not running.

Tools: 320 grit sanding paper, red scotch brite pad, pressure pot

1. Wash sheet metal and clean of foreign material; dry thoroughly.
2. Clean and remove all grease and wax using Duponts 3900S Cleaner prior to sanding.
3. Use 320 grit sanding paper to repair scratches or defects.
4. Scuff sand the entire area with a red scotch brite pad.
5. Wipe area clean using Duponts 3900S.
6. Blow and tack the area to be painted.
7. Apply a smooth coat of Duponts 1854S Tuffcoat Primer to all bare metal areas and allow to dry.
8. Apply 2 medium-wet coats of Duponts 222S Adhesion Promoter with a 5 minute flash between coats.
9. Apply texture coat using Duponts 1854S Tuffcoat Primer with pressure pot and 2-5 pounds air pressure; allow to flash 20 minutes.
10. Apply Duponts Topcoat Finishes such as Imron or Centari according to label instructions.