This is a fuel system leak tester adapter for Cummins ISX15 and QSX15. This is a replacement for part number 4919546. These are sold individually. To perform the procedure, you will need a quanity of 5.
The ATC 4919546 Fuel System Leak Tester Adapter is a precision diagnostic tool designed for use with Cummins ISX15 and QSX15 engine platforms. This adapter enables technicians to safely isolate and block high-pressure fuel rail connections during service procedures—such as leak detection, injector fault isolation, or fuel rail pressure testing—helping prevent fuel loss and enabling accurate diagnosis.
Manufactured to meet rigorous standards, this adapter is the direct replacement for Cummins OEM part number 4919546. It supports the TSB service procedure (as found in Cummins Technical Bulletin TSB150104) for high-pressure fuel rail testing.
Whether you’re servicing a heavy-duty repair shop or maintaining a large fleet, this adapter offers a reliable, time-saving solution for diagnosing high-pressure rail leaks, injector sealing faults, or pressure loss issues. Compatible with OEM diagnostic tooling and hose setups, it delivers the precision and durability necessary in professional environments.
Key Features & Benefits
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OEM replacement for Cummins part number 4919546, ensuring exact compatibility with ISX15/ QS X15 fuel systems.
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Enables proper isolation of high-pressure fuel rail connectors during leak-down tests, reducing the risk of fuel spray, fire hazard, and contamination.
-
Precision machined to fit Cummins high-pressure rail ports; ensures safe, repeatable service operations.
-
Ideal for fleet maintenance, remanufacturers, and heavy-duty truck service shops servicing ISX15/QSX15 engines.
-
Helps prevent costly downtime and rework by catching fuel-rail anomalies early.
The ATC 4919546 Fuel System Leak Tester Adapter is a precision diagnostic tool designed for use with Cummins ISX15 and QSX15 engine platforms. This adapter enables technicians to safely isolate and block high-pressure fuel rail connections during service procedures—such as leak detection, injector fault isolation, or fuel rail pressure testing—helping prevent fuel loss and enabling accurate diagnosis.
Manufactured to meet rigorous standards, this adapter is the direct replacement for Cummins OEM part number 4919546. It supports the TSB service procedure (as found in Cummins Technical Bulletin TSB150104) for high-pressure fuel rail testing.
Whether you’re servicing a heavy-duty repair shop or maintaining a large fleet, this adapter offers a reliable, time-saving solution for diagnosing high-pressure rail leaks, injector sealing faults, or pressure loss issues. Compatible with OEM diagnostic tooling and hose setups, it delivers the precision and durability necessary in professional environments.
Key Features & Benefits
-
OEM replacement for Cummins part number 4919546, ensuring exact compatibility with ISX15/ QS X15 fuel systems.
-
Enables proper isolation of high-pressure fuel rail connectors during leak-down tests, reducing the risk of fuel spray, fire hazard, and contamination.
-
Precision machined to fit Cummins high-pressure rail ports; ensures safe, repeatable service operations.
-
Ideal for fleet maintenance, remanufacturers, and heavy-duty truck service shops servicing ISX15/QSX15 engines.
-
Helps prevent costly downtime and rework by catching fuel-rail anomalies early.