This is the rear crankshaft seal installer for use on the the Cummins ISB, QSB, ISL and C8.3G. This is a direct replacement of the Cummins number 5395259, and works on seal #5405392
The M20198 Rear Crankshaft Seal Installer is a professional-grade service tool engineered for precise and damage-free installation of rear main crankshaft seals on Cummins ISB, QSB, ISL, QSC, and C8.3G engine platforms. Designed as a direct functional alternative to OEM installer 5395259, this tool ensures that the seal is pressed squarely, concentrically, and at the correct installation depth—critical for preventing premature leaks and preserving engine integrity.
Rear crankshaft seal installation on mid-range Cummins engines demands exceptional accuracy due to the relationship between seal crush, crankshaft position, and housing alignment. The M20198 takes the guesswork out of this process by utilizing a precision-machined driver system that eliminates tilting, over-pressing, and misalignment. Whether servicing on-highway trucks, construction machinery, agricultural equipment, or power units, technicians can count on this installer for consistent, repeatable results.
Built from heavy-duty materials for long shop life, the M20198 is ideal for engine rebuilders, fleet maintenance facilities, and professional diesel repair operations working on high-volume Cummins platforms.
Key Features & Benefits
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Fits multiple Cummins mid-range engines: ISB, QSB, ISL, QSC, and C8.3G (8.3L).
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Replaces or functions as an alternative to OEM tool 5395259.
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Ensures proper depth, alignment, and sealing pressure during rear crankshaft seal installation.
-
Prevents costly failures caused by cocked or damaged seals, housing misalignment, or uneven press loads.
-
Maintains factory-level sealing performance and long-term reliability of the crankshaft assembly.
-
Robust, shop-grade construction designed for repeated use in heavy-duty service environments.
-
Essential for in-frame and out-of-frame engine rebuilds, fleet service operations, and Cummins-certified repair workflows.
Applications
Use during rear crankshaft seal installation on:
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Cummins ISB 5.9 & 6.7
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Cummins QSB Series
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Cummins ISL / ISL9
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Cummins QSC / QSC8.3
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Cummins C8.3G Natural Gas Engines
Ideal for commercial truck fleets, agricultural machinery, construction equipment, and industrial power units.
The M20198 Rear Crankshaft Seal Installer is a professional-grade service tool engineered for precise and damage-free installation of rear main crankshaft seals on Cummins ISB, QSB, ISL, QSC, and C8.3G engine platforms. Designed as a direct functional alternative to OEM installer 5395259, this tool ensures that the seal is pressed squarely, concentrically, and at the correct installation depth—critical for preventing premature leaks and preserving engine integrity.
Rear crankshaft seal installation on mid-range Cummins engines demands exceptional accuracy due to the relationship between seal crush, crankshaft position, and housing alignment. The M20198 takes the guesswork out of this process by utilizing a precision-machined driver system that eliminates tilting, over-pressing, and misalignment. Whether servicing on-highway trucks, construction machinery, agricultural equipment, or power units, technicians can count on this installer for consistent, repeatable results.
Built from heavy-duty materials for long shop life, the M20198 is ideal for engine rebuilders, fleet maintenance facilities, and professional diesel repair operations working on high-volume Cummins platforms.
Key Features & Benefits
-
Fits multiple Cummins mid-range engines: ISB, QSB, ISL, QSC, and C8.3G (8.3L).
-
Replaces or functions as an alternative to OEM tool 5395259.
-
Ensures proper depth, alignment, and sealing pressure during rear crankshaft seal installation.
-
Prevents costly failures caused by cocked or damaged seals, housing misalignment, or uneven press loads.
-
Maintains factory-level sealing performance and long-term reliability of the crankshaft assembly.
-
Robust, shop-grade construction designed for repeated use in heavy-duty service environments.
-
Essential for in-frame and out-of-frame engine rebuilds, fleet service operations, and Cummins-certified repair workflows.
Applications
Use during rear crankshaft seal installation on:
-
Cummins ISB 5.9 & 6.7
-
Cummins QSB Series
-
Cummins ISL / ISL9
-
Cummins QSC / QSC8.3
-
Cummins C8.3G Natural Gas Engines
Ideal for commercial truck fleets, agricultural machinery, construction equipment, and industrial power units.