Caterpillar original Caterpillar 107-7773 fuel injector 320D 312D excavator spare part replacement for OEM new injector original new injector

The Caterpillar CAT 3116 3114 mechanical diesel fuel injector 107-7773 / 1077773 is designed as an OEM-type replacement for heavy-duty Caterpillar engines. It is built to deliver precise fuel metering and fine atomization through a heavy-duty mechanical construction, supporting stable idle performance and strong load response across demanding operating conditions. This injector serves as a direct-fit solution for distributors, workshops, and fleet operators seeking reliable aftermarket availability with consistent quality.

With wide cross-reference coverage including 107-7733, 1077733, 107-7732, 0R-8682, 0R8682, 127-8216, 1278216, CA1077773, CA1077733, CA0R8682, and CA1278216, the 107-7773 injector is suitable for a broad range of Caterpillar equipment. It fits excavators such as 320B, 322B, 322B L, 322B LN, 325B, and M318; wheel loaders including 924F, 928G, 938F, and 950F II; motor graders 120H and 135H; backhoe loader 446B; scraper 613C II; track loaders 953C and 963B; asphalt pavers AP-1000 and AP-1050; and compactors CB-634, CP-533, CP-563, CS-531, CS-533C, and CS-563C. It is also compatible with generator sets, industrial diesel power units, trucks, and marine auxiliary power applications.

Distributor-friendly packaging options include neutral box, branded box, customer label, and export carton, available as single unit, full engine set, or bulk packing. Routine maintenance recommendations include using clean diesel fuel, replacing fuel filters on time, draining the water separator, keeping the fuel tank free from sludge and water, and storing injectors in sealed dry packaging. If multiple injectors show wear or uneven output, replacement of the full set is advised.