Overview – WATER HOSE 503-1266
Engineered for Cummins cooling-system positions, the Cummins WATER HOSE 503-1266 meets the tolerances your equipment was designed around.
Parts Characteristics
A water hose that carries coolant between the core and the block so the flow stays clear in the engine cooling, so the coolant route stays clear and bolted. It carries the service life the engine cooling depends on, so a true, correctly specified unit keeps the crack and leak from the coolant escapes and the engine overheats.
Applicable Models & Applications
Used at Cummins Hydraulic Parts positions specifying this WATER HOSE. Match the bore, port and seal face against your old unit – Hydraulic Parts parts differ in how they seat and bolt.
Maintenance & Replacement
Inspect for wear and a loose fit at every service. A water hose that has begun to fail lets the coolant route drift, and the drift is what causes the crack and leak.
Confirm the water hose seats and the fixings hold on fit. A unit canted in its bolts lets the coolant route move, and the move is where it fails.
Replace rather than repair a failed one where the part allows. A water hose reused past its life returns the same fault, and the fault is what stops the machine.
Keep the correct water hose for your hydraulic parts on the bench. It is cheaper than the downstream failure, and it is exactly the part missing when a service needs doing today.
Price Reference (USD)
The WATER HOSE 503-1266 generally falls in the USD 5-35 bracket, with expedited freight quoted separately.
Value & Service
We supply brand-new Cummins WATER HOSE with the bore, port and seal face confirmed against your hydraulic parts, so the coolant route stays clear and bolted.
For critical Cummins Hydraulic Parts such as the WATER HOSE 503-1266, Racer Machinery offers both single units and bulk quantities with traceable sourcing.







