TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Note. In stubborn cases, when the nozzle is frozen, it will be necessary to remove the fuel inlet connector from the nozzle and turn the nozzle using wrench socket - 5120-875-9556. When the nozzle is free of cylinder threads, install mechanical puller - 5120-873-6943 in the 7 / 16-20 tapped hole in the end of the nozzle holder. Remove nozzle and holder using puller. Figure 4-152. Loosening fuel injector nozzle and holder retainer using wrench-5120-871-7198. Remove 1. Remove fuel injector nozzle and holder assembly. Remove and discard gasket (A). 2. Remove and discard fuel injector nozzle holder preformed packing (B). Install Note. Use only the dead soft copper gasket - 5310-861-1406 for replacement seal whenever the fuel injector nozzle and holder assembly has been removed from the cylinder. The dead soft copper gasket conforms to the specific contours of the nozzle cylinder head seat in an individual installation. Because of this, it is the only ap- proved gasket for this function and should never be reused. Before installing new gasket in cylinder nozzle seat, always check to be sure that original gasket has been removed as an inad- vertent installation of two seating gaskets would damage the fuel injector nozzle retaining spring. Check to be sure cylinder nozzle seat is free from excessive carbon deposit and that the seat face is free from surface roughness. Remove carbon deposits and / or surface roughness using nozzle carbon cutter - 4910-795-7958. 1. Install new preformed packing (B) on fuel injector nozzle holder. 2. Install new gasket (A) and install fuel injector nozzle and holder assembly. Figure 4-153. Removing or installing fuel injector nozzle and holder assembly. 4-74