2006/05/29 Caterpillar


Radiator pedestal on 1104C-TAG engines: Smaller engine mounting holes for improved accuracy of the fan position in the radiator cowl. {1353}

Usage:

C4.4 XYC
Engine:
C4.4 (S/N: XYC1-393)

Olympian North American and Caterpillar generator sets using Caterpillar C4.4 engines have an improved radiator pedestal design. The improvement which applies to the 265-4801 Radiator Mounting Gp consists of a reduction in the size of the holes that accommodate the screws securing it to the engine. The size reduction of these holes is from 13 mm (0.51) to 12.5 mm (0.49). This reduction in clearance for the screws ensures the fan is positioned accurately within the radiator cowl.

Troubleshooting

The following troubleshooting points can help avoid unnecessary damage to the fan and radiator during operation of the generator set.

  1. As a temporary action, the generator sets of this model built after serial number S/N:X4P393
    were fitted with (2) spacers. These spacers are located between the underside of the radiator and the vibration mounts on the radiator pedestal. The MGC-3996 Spacers are painted black, are 6 mm (0.24 inch) thick and are 52 mm (2.05 inch) in diameter. If your generator set has these spacers, there should be no risk of the fan contacting the radiator cowl.

  1. If the generator set does not have these spacers, it can still operate satisfactorily provided that the position of the fan is centered within the radiator cowl. This can be visually checked.

  1. If required, the position of the fan within the cowl can be adjusted by loosening the 8 screws, (4 per side), securing the radiator pedestal to the engine, moving the radiator to the correct position and retightening these screws.

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