Buy Caterpillar 3J1991 - GASKET at wholesale prices with easy payment and fast shipping options. Save up to 50% OFF OEM pricing. Compatible Machines:- ENGINE - MACHINE- TRACK-TYPE TRACTOR- WHEEL-TYPE SKIDDER Compatible Models:- 3304- 3306- 6A- 6S- D6E SR- 518C Units Containing The Spare Part :- 8P-4167 LINES GP-PUMP (3306)- 5Y-1515 LINES GP-REAR ATTACHMENT (3306)- TANK GROUP ()- 1U-1619 TANK & FILTER GP-HYDRAULIC (3304)- 6J2164 HYDRAULIC TANK AND VALVE GROUP--Part 2 of 2 (140)- 3J3901 TANK AND VALVE GROUP -- Part 2 (153)- 3J3898 TANK AND VALVE GROUP--Part 2 (153)- 3J3894 TANK AND VALVE GROUP--Part 2 (153)- TANK AND FILTER (6J4020 N/S) (14E)- 7J388 TANK AND FILTER GROUP--Type 1 (14E)- 3J3901 TANK AND VALVE GROUP--Part 2 of 2 (153)- 3J3898 TANK AND VALVE GROUP--Part 2 of 2 (153)(Caterpillar - B-Brand)