Engine 4M40 Piston Kit 190-5751 190-5752 139-7827 Fit Excavator Caterpillar CAT 305.5 306 307C 307D 308C CR

Product Name: Piston Kit
Reference Part Number: 190-5751, 195-5752, 139-7827
Compatible Machine: Excavator Caterpillar CAT 305.5 306 307C 307D 308C CR…

Description:
Engine Cylinder Piston converts the energy from combustion into mechanical work, driving the crankshaft and enabling engine operation.

An Engine Cylinder Piston transforms the force generated by combusted fuel into motion. Positioned within the cylinder, the piston moves up and down as the gas pressure expands. This reciprocating motion is transmitted through the connecting rod to the crankshaft, which then converts this linear movement into rotational force. This rotational momentum is necessary for driving the engine’s flywheel and, ultimately, powering the equipment. The efficiency of this process directly affects the engine’s performance and power output, making the piston assembly integral to the engine’s overall functionality.

Pos. Part No Qty Parts name Comments
1. 190-5756 B [1] SET-PISTON RING 190-5757 AB SET-PISTON RING (0.5-MM OS)
190-5758 AB SET-PISTON RING (1-MM OS)
2. 139-7827 [8] RING
3. 190-5752B [4] PISTON (STANDARD)
190-5751 B [4] PISTON (STANDARD)
190-5753 B [4] PISTON (STANDARD)
190-5755 AB PISTON (1-MM OS)
190-5754 AB PISTON (0.5-MM OS)
4. 139-7835 [4] ROD AS
4A. 139-7898 [8] NUT
4B. 139-7964 [4] BUSHING
4C. 139-7897 [8] BOLT
4D. 139-8093 B [4] SET-BEARING (YELLOW)
139-8094 B [4] SET-BEARING (COLORLESS)
139-8095 B [4] SET-BEARING (BLUE)
139-8096AB [4] SET-BEARING (0.25-MM US)
139-8097 AB [4] SET-BEARING (0.5-MM US)
139-8098 AB [4] SET-BEARING (0.75-MM US)
139-8099 AB [4] SET-BEARING (1-MM US)
9. 139-7946 [4] PIN
A NOT PART OF THIS GROUP
B USE AS REQUIRED