Rear Crankshaft Seal Installer made for Cummins L10 ISM and M11. This is for the new style seal. This will install seal #3883620 or #4089544The M20151 Rear Crankshaft Seal Installer is a precision-engineered service tool designed specifically for Cummins L10, M11, and ISM diesel engines. This installer is used to accurately position and install the rear main crankshaft oil seal to OEM specifications during engine rebuilds, in-frame repairs, or rear seal replacement procedures.
Proper installation of the rear crankshaft seal on Cummins L10/M11/ISM engines is critical to preventing oil leaks and ensuring long-term engine reliability. Incorrect installation methods can distort the seal, damage the sealing lip, or misalign the seal in the housing—leading to premature failure and costly rework. The M20151 eliminates these risks by applying even, concentric force to the seal, ensuring correct depth, alignment, and seating every time.
Built for professional diesel technicians, engine rebuilders, and fleet maintenance facilities, the M20151 provides repeatable accuracy and durability in demanding shop environments where precision matters.
Key Features & Benefits
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Designed specifically for Cummins L10, M11, and ISM engines.
-
Ensures correct rear crankshaft seal alignment and installation depth.
-
Prevents seal distortion, lip damage, and oil leakage.
-
Precision-machined for consistent, repeatable results.
-
Heavy-duty construction for long service life in professional shops.
-
Essential for in-frame service, rear seal replacement, and engine rebuilds.
Applications
-
Cummins L10 / M11 / ISM diesel engines
-
Rear crankshaft oil seal installation
-
Engine rebuilds and overhaul operations
-
Fleet maintenance shops and diesel engine rebuild facilities
The M20151 Rear Crankshaft Seal Installer is a precision-engineered service tool designed specifically for Cummins L10, M11, and ISM diesel engines. This installer is used to accurately position and install the rear main crankshaft oil seal to OEM specifications during engine rebuilds, in-frame repairs, or rear seal replacement procedures.
Proper installation of the rear crankshaft seal on Cummins L10/M11/ISM engines is critical to preventing oil leaks and ensuring long-term engine reliability. Incorrect installation methods can distort the seal, damage the sealing lip, or misalign the seal in the housing—leading to premature failure and costly rework. The M20151 eliminates these risks by applying even, concentric force to the seal, ensuring correct depth, alignment, and seating every time.
Built for professional diesel technicians, engine rebuilders, and fleet maintenance facilities, the M20151 provides repeatable accuracy and durability in demanding shop environments where precision matters.
Key Features & Benefits
-
Designed specifically for Cummins L10, M11, and ISM engines.
-
Ensures correct rear crankshaft seal alignment and installation depth.
-
Prevents seal distortion, lip damage, and oil leakage.
-
Precision-machined for consistent, repeatable results.
-
Heavy-duty construction for long service life in professional shops.
-
Essential for in-frame service, rear seal replacement, and engine rebuilds.
Applications
-
Cummins L10 / M11 / ISM diesel engines
-
Rear crankshaft oil seal installation
-
Engine rebuilds and overhaul operations
-
Fleet maintenance shops and diesel engine rebuild facilities