Cummins — 37. Install the bypass connection gaskets. Tighten the
For these Cummins models: GTA38, GTA38, GTA50, GTA50.
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Procedure
- 40. Close the drain-cock on the water pump and cylinder
- block. There are two drain-cocks on each side of the
- engine.
- 41. Replace the coolant filters.
- 42, Connect the lower radiator or heat exchanger hose
- to the water pump inlet.
Source: manual:Cummins Gas GTA38-50 Manual 1999 (2).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.