Gear Pump 6E4386 6E-4386 For Caterpillar Tractor D8N D8R Engine 3406. Charge Pump Part Number: 6E4386, 6E-4386. Application: For Caterpillar Tractor D8N D8R Engine 3406. Orders are processed Monday thru Saturday, excluding legal holidays. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Pump Parts & Accessories\Other Pump Parts & Accessories".The seller is "moverparts" and is located in this country: CN. This item can be shipped worldwide.