This valve seat ring is sintered from high-hardness wear-resistant alloy powder with high structural density and strong impact resistance. It can withstand the frequent high-speed impact and friction of the intake valve during engine long-term operation, effectively reducing the wear loss of the valve seat and protecting the cylinder head assembly from structural damage and precision loss.

This OTTO OEM-standard exhaust valve seat insert with OEM part number 212-8917 is a core cylinder head component designed for Caterpillar C9 diesel engines, perfectly matching CAT 330D, 336D and 336D2 medium-large crawler excavators. Press-fit into cylinder head exhaust ports, it forms the sealing contact surface for exhaust valves, enduring repeated high-frequency valve impact and scorching high-temperature exhaust gas scouring during long-hour mining, rock breaking and heavy earthmoving construction. It maintains tight exhaust sealing to stabilize engine combustion efficiency and avoid exhaust blow-by under continuous heavy loads.

OTTO OEM-spec intake valve seat insert 241-8388 is a bulk wholesale engine core component designed exclusively for Caterpillar C9 diesel engines, compatible with CAT 330D, 336D, 336D2 and 340D medium-large crawler excavators. Press-fitted into cylinder head intake ports, it bears repeated impact from intake valves and high-temperature intake airflow during continuous heavy mining, rock excavation and long-shift construction work. It maintains tight air sealing to guarantee complete fuel combustion and stable output power of heavy-duty machinery.

This OTTO heavy-duty O-ring seal with OEM part number 228-7096 is a universal sealing replacement spare designed for Caterpillar C4.4 and C6.6 diesel engines, perfectly suited for CAT M313D and M315D wheeled excavators. It is widely fitted on engine lubrication passages, cooling joints, fuel connectors and hydraulic valve ports, forming a complete sealed barrier to prevent oil, coolant and hydraulic fluid leakage under long-hour municipal road maintenance, urban construction and frequent mobile operation conditions.

This genuine OEM solenoid valve assembly includes a seat and is designed for direct hydraulic system replacement in Komatsu PC200, PC210, PC220, and PC240 excavators.

This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

OTTO ZX450-3 Excavator Parts 1117151091 1-11715109-1 6WG1 Engine Valve Seats for Isuzu Engine Parts This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

OTTO ZX450-3 Excavator Parts 6WG1 Engine Valve Seat 1117110741 1-11711074-1 Exhaust Valve Seat for Isuzu Diesel Engine This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

OTTO 4HK1 6HK1 Engine Cylinder Head Intake Valve Seat 8980288750 8-98028875-0 For hitachi ZX240-3 ZX330-3 Excavator parts This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

OTTO Genuine Original 4HK1 8980288740 8-98028874-0 Valve Insert Seat for ISUZU 4HK1 Engine NPR75 Excavator parts This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty

OTTO Excavator Spare Parts 5117110280 5-11711028-0 Exhaust Valve Seat for Isuzu 6BG1 Engine Parts This used for EXCAVATOR,Original new and china could offer and With 3-12 months warranty