3641870M91: Water PumpPump, Water w/o Pulley, 15/16" ShaftThis water pump without pulley is completely new, from the seal to the housing, and has a 0.9375" shaft size. It is Fits Massey Ferguson Tractor 1100 (with single thermostat) and 1130 (with single thermostat). (NOTE: replaces 3641870M91-R, 3641870M91-RP, 37712330, 37712330P)WATER PUMP W/O PULLEYPart(s) Included3641870M91: Water Pump (x1)SpecificationsWeight:23 lbsReplaces:3641870M91-RReplaces:3641870M91-RPReplaces:37712330Replaces:37712330PFitment1100, 1130Return Policy:If an item purchased from our store arrives damaged, faulty, or in any way not as described, let us know within 30 days and we will send you a shipping label and the purchase price will be refunded in full.If you have simply changed your mind, mail it back to us within 30 days and the purchase price will be refunded in full.