SCREW-UNIT INJ ADJUSTMENT 4P4278 - Caterpillar

Place the unit on stable, level ground. Chock the wheels.Remove the front battery compartment cover. Disconnect the enclosure lighting wiring harness from the trailer frame wiring harness.Disconnect the battery cables. Be sure to pull the cables out of the battery compartment through the electrical cable bushing and wall to avoid damage to the enclosure wall or to the cables.Remove the enclosure package from the trailer. Refer to Lifting the Generator Set Enclosure Package From the Trailer in this publication.Remove all of the enclosure perimeter mounting nuts. Lift the foam liner as required in order to gain access. Be careful not to damage the bottom enclosure seal during removal.Remove the exhaust mounting bolts from the turbocharger exhaust elbow. The flexible exhaust piping and the exhaust silencer remain with the enclosure.Remove the rear bulkhead.Disconnect the generator leads.Disconnect the voltage regulator.Disconnect the battery charger DC wiring.Disconnect the jacket water heater, the battery charger, and the generator heater from the receptacles.Disconnect the engine wiring harness from the control panel.Disconnect the oil drain line and the water drain line after the ball valve which attaches to the enclosure (inside the discharge air plenum).Remove the fumes disposal tube which is routed to the discharge air plenum.
Be sure that the enclosure is completely disconnected and ready to remove from the trailer before loosening the lifting arch attachment bolts.
Loosen, but do not remove the lifting arch attachment bolts. The lifting arch should remain attached loosely to the base assembly during the removal of the enclosure. The lifting arch should have some play so that the enclosure does not bind on the lifting eye during the enclosure removal.When removing the enclosure, be careful not to catch the enclosure on miscellaneous engine components.
The doors should be secured or removed before lifting the enclosure.
Use the door openings as lift points. Lift the enclosure using nylon straps through the door openings. Spread the straps to each end of the door openings in order to distribute the weight and avoid damaging the enclosure.Place the enclosure aside for later reinstallation. Remove the lifting arch attachment bolts. Place the lifting arch aside for later reinstallation.Remove the:* engine mounting bolts* generator mounting bolts* fan guard* upper radiator supportsDisconnect the generator ground strap.Disconnect the fuel lines.Drain the radiator. Remove the upper and lower radiator (water) lines.Remove the engine and generator. Lifting the engine and generator together requires special equipment and procedures. Contact your Caterpillar dealer for information regarding fixtures for proper lifting of your engine package.Reverse the process to install the engine and generator and enclosure package.Torque all fasteners as per Table 1 in the Appendix.
The engine mounting bolts for resilient engine mounts must be torqued to 451 N m (332 lb ft) in order to ensure proper functioning of the engine mounts.