
Cylinder Test Valve (Valve Assembly)
Cylinder Test Valve (Valve Assembly)
Application: EMD 645 and 710 series engines
Part of our Cylinder test valve product line
The Cylinder Test Valve (Valve Assembly) is identified by EMD Part Nos. 40035242 and 8048880 and DLW Part No. 16220018. EMD parts references identify 40035242 as the EMD 710 cylinder test valve assembly and 8048880 as the EMD 645 cylinder test valve assembly, with DLW 16220018 as the corresponding reference. The assembly is documented for EMD 645 and 710 engine applications.
How This Part Works
The Cylinder Test Valve is a valve assembly used in the cylinder test-valve arrangement of EMD engines. The assembly includes the cylinder test-valve body, needle valve, packing nut, and sealing component. It provides the designated valve arrangement for cylinder testing and related maintenance procedures.
Signs It's Time to Replace
- Valve leakage: leakage through or around the test-valve assembly can indicate deterioration of sealing or valve components
- Needle valve deterioration: damage or wear to the needle valve can affect valve operation
- Seal deterioration: a damaged seal can compromise the sealing function of the test-valve assembly
- Packing concerns: deterioration of the packing arrangement can result in leakage
- Thread or body damage: damage to the valve body or threaded connections can affect proper assembly and serviceability
Apex identifies the Cylinder Test Valve assembly by EMD Part Nos. 40035242 and 8048880 and DLW Part No. 16220018. This part-number-based identification distinguishes the EMD 710 and 645 references while retaining the corresponding DLW number, helping customers select the correct cylinder test valve assembly for the applicable engine.
See all Cylinder test valve parts →- Engine Compatibility
- EMD 645 & EMD 710 Series
- Applications
- Locomotive · Marine · Power Generation
- Quality Standard
- ISO 9001:2015 Certified · OEM Grade






