What is the first check for this task?

Stop and cool the machine according to service guidance. This first check matters because the rest of the workflow assumes the correct item, information and starting condition.

What result should be written down?

Record the result of “Escalate pressure, combustion-gas or internal-engine tests to competent personnel.” together with the exact item or batch, relevant settings and any photograph or measurement that another person would need to repeat the decision.

How do I confirm 8972541481 before ordering?

Yes, when the old pump is stamped 8972541481 or 8-94140341-0 on an Isuzu 4LE1. Hitachi ZX55, ZX55UR, E55 and EX55 machines that run that engine and number take this aluminium pump.

What is an immediate stop signal?

Opening a hot cooling system. is one avoidable failure. Also stop whenever a wrong cooling-system part or poor installation can cause overheating and engine damage. Verify the engine plate, machine serial, old casting/part number and service information; installation and coolant handling should be performed by a competent person.

Excavator Water Pump Failure Signs to Check Before Ordering

A hot excavator on a British site can be a hose, belt or radiator as easily as the pump. Check those first, then order this aluminium Isuzu 4LE1 pump when the old unit is 8972541481 or 8-94140341-0.

Signs that point at the pump

Coolant at the small weep hole on the pump body, a grinding or whining noise from the pulley, play in the hub, or temperature that climbs under digging load after you have confirmed level, belt and radiator airflow. Dried pink or green staining on the housing is worth a look at the end of a shift.

What else overheats a 4LE1

A collapsed hose, a clogged radiator, a stuck thermostat or a slipping belt will cook the engine with a healthy pump still fitted. Open a hot cooling system and you get scalding coolant — wait until it is cold.

Order the right metal

This listing is a belt-driven aluminium coolant pump for the Isuzu 4LE1, with a housing gasket and smaller round seal in the box. Hitachi ZX55, ZX55UR, E55 and EX55 machines that run that engine and part number take it. Confirm the stamp before you click buy.

When you are ready to swap

Cold engine, battery off, drain, strip the belt and fan, clean the block, fit the supplied gaskets, torque the pump-to-block bolts to 1.9–2.9 kg·m (14–21 lbf·ft), refill, bleed, check for leaks.

See the Isuzu 4LE1 Water Pump 8972541481 for the aluminium housing, packing size and the gasket set in the box.