Maintenance 5 Checking the fuel pump Let the fuel pump be checked at a garage which is authorised by Komatsu. Checking the fuel and coolant tubes, replacing the tubes (if required) Have the fuel and coolant tubes checked and replaced, if required, at an authorised Komatsu garage. Checking the water pump Let the water pump be checked at a garage which is authorised by Komatsu WA90-5 – VEAM270100 5-71