OTTO Excavator Parts Nkr77 4Jh1 Cooling Water Bypass Pipe Gasket 8943656760 894365-6760 8-94365676-0 For Isuzu Durable 8-94365676-0 gasket fits OTTO Nkr77 & Isuzu 4Jh1. Resists mining dust & coolant corrosion, maintains tight seal under high temp. Prevents leaks to ensure steady engine cooling for heavy work.