Weichai Filter Set 614080739 / 614080740 Service Guide
The Weichai filter set 614080739 / 614080740 contains two identified service elements. Before work, confirm which number belongs at each mounting position; the pair should not be installed by appearance or package order alone.
Record the installed arrangement
Photograph both filter heads and existing labels.
Trace fuel flow from tank through each filter to the engine.
Confirm whether bowls, sensors, drains or seals are reusable or included.
Check engine instructions for a prescribed replacement and priming sequence.
Why order and cleanliness matter
Swapping a primary and secondary element can change filtration sequence. Dirt introduced on the clean side may reach precision injection components. Clean the housing exterior, cap open ports and use clean tools during replacement.
Prime and inspect the circuit
Use the engine’s manual priming method. Do not crank for extended periods to force fuel through a dry system. Inspect each seal and connection for seepage, then confirm stable starting and operation under controlled conditions.
Related filter-head fitment
Use the 612600081334 filter-head and seal guide when checking single-filter interface details; it is a separate product reference.
FAQ
Which filter goes first?
Follow the engine’s marked flow path and service documentation; do not infer order from the part numbers.
Are seals automatically included in the set?
The record does not specify kit contents. Confirm the supplied list before purchase.
How do I prevent air entering after service?
Install clean seals correctly, prime with the approved method and inspect joints during starting.
Compatibility: Match both numbers to their engine positions and verify serial-specific service instructions.
