KIT-GASKET 6V2590 - Caterpillar

1693, 3406, 3408 Truck EnginesReference: "Be Sure To Drain Oil In BrakeSaver At Every Lubricating Oil Change Period", Engine News, August 24, 1977, Pages 5 and 6.Make a mark through your copy of the reference article. The reference article had some wrong information. This article is reprinted with corrected information.
On 1693, 3406 and 3408 Engines equipped with a BrakeSaver, the lubricating oil in the BrakeSaver is not automatically drained when the lubricating oil in the oil pan is drained. It is necessary to drain the oil from the BrakeSaver separately. Failure to drain the oil from the BrakeSaver will cause dirty oil in the BrakeSaver to mix with the new clean oil.
On 1693 Engines, drain the oil from the oil pan by removal of the 3B551 Plugs. Drain the oil from the BrakeSaver by removal of the 2B858 Plugs in the oil lines. See Illustration 1.
On 3406 and 3408 Engines, drain the oil from the oil pan by removal of the 6B5262 Plug. Drain the oil from the BrakeSaver by removal of the 6B5262 Plug in the BrakeSaver control valve. See illustration 2.
Illustration 1. Location of drain plugs on 1693 Truck Engine.
Illustration 2. Location of drain plugs on 3406 and 3408 Truck Engines.