ALTAMONTE DIESEL Specialists Located in Altamonte Springs Central Florida ONE YEAR MANUFACTURERS WARRANTY ON THIS PRODUCT. WE ARE A DIESEL FUEL INJECTION FACILITY WITH 33 YEARS EXPERIENCE. CATAPILLAR 9H5796 Barrel/Plunger Assy - Fits: 561-D320-D4D AFTERMARKET O.M.A.P made in Italy. 1. Introduction: The Function and Context of the 9H5796 Assembly The 9H5796 Barrel/Plunger Assembly is a highly specialized and critical component within the mechanical fuel injection system of legacy Caterpillar diesel engines. Its role is fundamental to the entire combustion process, serving as the core mechanism for generating the immense pressure required to deliver fuel precisely to the engine's combustion chambers. Within an in-line injection pump, a plunger is driven by a camshaft to reciprocate rapidly within a stationary barrel. 1 This motion, occurring within a meticulously engineered, precision-fit environment, compresses diesel fuel to a high pressure. This high-pressure fuel is then forced through a delivery valve and into the injector, where it is atomized into a fine spray. 2 The accuracy of this process?including the timing, pressure, and volume of the fuel delivered?directly determines an engine's horsepower, torque, efficiency, and overall performance. Compatibility and Application The 9H5796 assembly is an original equipment manufacturer (OEM) part designed for a specific range of legacy Caterpillar machinery and engines. These models, which include various industrial engines, tracked tractors, and motor graders, represent a specific era of heavy equipment that utilized robust mechanical fuel systems. Machine Type Specific Model Engine Number Industrial Engine D320A D320A Tracked Bulldozer D4D D320 Motor Grader 12E, No. 12, No. 12 MTR D320A Pipelayer 561B D320 Specification Measurement (Imperial) Measurement (Metric) Source(s) Weight 0.35 - 0.4 lbs 0.19 kg Length 3.14 in / 3.74 in 8.99 cm / 9.5 cm Height 1.66 in / 1.77 in / 1.97 in 4.5 cm / 5 cm Width 1.77 in / 1.97 in 4.5 cm / 5 cm DIESEL SPECIALISTS INC. LIMITED WARRANTY POLICY Diesel Specialists Inc., hereafter mentioned as DSP, issues the following warranty on all DSP product. This warranty is extended to the original purchaser of the product only, unless approved of in writing by DSP. Our product is warranted to be free from defects in material or workmanship under normal use and service, for a period of (1) one year from the original purchase date. The obligation of DSP under this warranty is limited to the repair or replacement of the defective unit. Repair or replacement of the unit shall be at the sole discretion of DSP. The defective unit must be returned within 30 days of the failure date to be considered for warranty. Any product that is not installed according to the manufacturers guidelines is not covered under any warranty by DSP. This limited warranty is in lieu of all other warranties, either expressed or implied. All obligations or liabilities of DSP are expressly disclaimed, including claims for R R expenses, liability of consequential damages, down time, loss of revenue, or any other inconvenience cost. International Buyers ? Please Note: a) Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer?s responsibility. b) Please check with your country?s customs office to determine what these additional costs will be prior to bidding/buying. c)These charges are normally collected by the delivering freight (shipping) company or when you pick the item up ? do not confuse them for additional shipping charges.