Overview – ADAPTER, REDUCING 3164421 Series
3164421 is the CUMMINS part number for this ADAPTER, REDUCING, fitted in Cummins diesel engine hydraulic and tube line connection applications. We keep the series in our catalogue and can quote it with or without related parts.
Parts Characteristics
3164421 is the CUMMINS reducing adapter that joins two tube or hose sizes in the engine circuits, machined with the original thread size on each end and the correct hex section for installation. The body is made from the OEM material grade and the sealing faces are finished to the original surface, so the adapter seals without extra packings in the pressure circuit. The bore is machined to the smaller line size, keeping the flow path smooth through the reduction.
Applicable Models & Applications
This reducing adapter is used on Cummins diesel engines where the original 3164421 size step applies, including fuel, oil, coolant and hydraulic circuits that change line size at the pump, the filter head or the heat exchanger. Confirm the thread sizes and the sealing type against the adapter removed from your engine before ordering, as the same series covers many size steps and thread standards. We can confirm the correct adapter for your line layout from the two hose sizes and the circuit pressure rating.
Maintenance & Replacement
Clean the threads and the sealing faces before assembly, and apply the specified sealant or torque without over-tightening the adapter body. Check the adapter at each service for weeping around the threads and for corrosion on the hex section. When replacing, fit the adapter with new sealing washers or O-rings as specified, and re-torque after the first hours of running.
Price Reference (USD)
Typical market pricing for ADAPTER, REDUCING (3164421) falls in the USD 14 – 60 range per unit. The exact quote depends on order volume, finish grade and delivery address, so please ask our team for today’s price.
Value & Service
We verify 3164421 against the original CUMMINS thread and bore specification before dispatch, so the adapter seals at the rated circuit pressure. The size is held in stock together with the related adapters in the series, and a set of the common sizes ships in one tracked order. As a line-fitting item, we recommend keeping the matching sizes in stock for quick line repairs.
The same-series numbers in the ADAPTER, REDUCING Series range: 3347746, 3503678, 3647767, 3647869, 3697856F, 3976110, 3976112, 4001015, 4014518, 4016412, 4016444, 4063315, 4080221, 4086158, 4098041, 4319721X, 4964133, 4964178, 4970912, 5576048F, and more.
Buy ADAPTER, REDUCING (3164421) from Racer Machinery – a specialist in CUMMINS construction machinery parts. Every order is checked against the original specification and backed by our quality guarantee.
