OTTO Excavator Parts Tfr55 4Jb1T Cooling Water Bypass Pipe 8971682200 897168-2200 8-97168220-0 For Isuzu Durable 8-97168220-0 pipe fits OTTO Tfr55 & Isuzu 4Jb1T. Resists mining dust/heat, pressure-stable. Ensures steady engine cooling for non-stop heavy work.