OTTO Excavator Parts Nkr77 4Jh1 Cooling Water Bypass Pipe 8973000620 897300-0620 8-97300062-0 For Isuzu Premium Isuzu 4Jh1 cooling water bypass pipe (8973000620) for OTTO Nkr77. Precise fit, anti-corrosion & robust. Ample stock, fast dispatch—reliable for your client supply.