This is a reman injection pump for the early John Deere 3020 tractors. The pump model listed on the name plate will be either a DBGVC431-3AJ or DBGVC431-8AJ. When removing the original pump, set the engine timing to TDC, remove the timing plate held on by 2 screws, and verify that two timing lines are in alignment with one another. At this point the pump can be removed from the engine. WARRANTY: This reman injection pump is warranted to be free from defects for a period of one year. Not included under this warranty are failures or damages caused by any form of fuel contamination, plugged fuel filters, improper installation, improper handling, or any abnormal issue causing pump failure. CORE CHARGE: You will not be charged a core charge at the time of purchase. However, a core charge of $450.00 will be applied on your credit card account if the core is not returned within 30 days. Feel free to call our parts department at 800-891-8038 with any questions or if a conflict should occur.