The M50139 Upper Deck Counterbore / Shim Cutter is a specialized hand-operated tool engineered for precision machining of the upper counterbore (“shim ledge”) surfaces in Caterpillar 3306, 3406, and 3176 engine blocks. This tool allows engine rebuilders and machinists to restore the flat, concentric ledge surface used for proper liner seating and shim adjustment, ensuring accurate liner protrusion and sealing.
It is sold as the cutter housing only; cutter plates specific to each engine model (3306, 3406, 3176) must be selected separately to match bore diameters. The M50139 is robust in construction and intended for repeated use in shop conditions.
Key Features & Benefits
-
Designed specifically for Caterpillar 3306, 3406, 3176 upper deck counterbores
-
Hand-operated shim cutter tool for restoring counterbore ledge surfaces
-
Supports modular cutter plates to adapt to different engine models
-
Ensures accurate liner shim spacing, better sealing, and consistent protrusion
-
Heavy-duty build suited to engine rebuild shops and diesel machinists
Offers a small footprint (three legged) than the M50133 PT2250-B allow less time required to remove conflicting engine componets
HEAVY
ITEM NOT ELIGIBLE FOR FREE
SHIPPING
The M50139 Upper Deck Counterbore / Shim Cutter is a specialized hand-operated tool engineered for precision machining of the upper counterbore (“shim ledge”) surfaces in Caterpillar 3306, 3406, and 3176 engine blocks. This tool allows engine rebuilders and machinists to restore the flat, concentric ledge surface used for proper liner seating and shim adjustment, ensuring accurate liner protrusion and sealing.
It is sold as the cutter housing only; cutter plates specific to each engine model (3306, 3406, 3176) must be selected separately to match bore diameters. The M50139 is robust in construction and intended for repeated use in shop conditions.
Key Features & Benefits
-
Designed specifically for Caterpillar 3306, 3406, 3176 upper deck counterbores
-
Hand-operated shim cutter tool for restoring counterbore ledge surfaces
-
Supports modular cutter plates to adapt to different engine models
-
Ensures accurate liner shim spacing, better sealing, and consistent protrusion
-
Heavy-duty build suited to engine rebuild shops and diesel machinists
Offers a small footprint (three legged) than the M50133 PT2250-B allow less time required to remove conflicting engine componets
HEAVY ITEM NOT ELIGIBLE FOR FREE SHIPPING
