Zx55Ur Water Pump Explained: A UK Buyer's Guide

ZX55UR machines work in tight British sites where the 4LE1 sits in a small bay. If that engine is running hot, confirm the water pump stamp before you order a replacement. This page is for the aluminium coolant pump supplied to 8972541481 — same number family as 8-94140341-0 — with housing gasket and round seal in the box.

Does a ZX55UR take 8972541481?

Those ZX55UR excavators that run an Isuzu 4LE1 and that part number take this pump. Read the number on the unit you are taking off, then order this aluminium housing.

How a failing UR pump shows up

Coolant at the weep hole, a whine from the pulley when you put the hydraulics under load, or temperature that will not settle after you have checked the belt and radiator. Keep the cooling system closed until the engine is cold.

What you are fitting

Aluminium housing, pulley hub with four fixing holes, hose necks in the 4LE1 layout. Torque the pump-to-block bolts to 1.9–2.9 kg·m (14–21 lbf·ft). Original mounting bolts stay on the machine unless the maker says otherwise.

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