Cummins 3905491 Fuel Filter Head Assembly

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Material	Die-Cast Aluminum Alloy
Filter Mount Thread	1-14 UNS
Inlet Thread	M16 x 1.5
Outlet Thread	M16 x 1.5
Return Port Thread	M14 x 1.5
Net Weight	0.40 kg
Operating Pressure	0.7 MPa Max
Package Dimensions	17.8 × 10.2 × 3.2 cm

Manufacturer No.

3905491
FS1280
FF5052
3936315
3897331
3915240
3897327
3915238
3904362
3903844
A3905491

OEM Part No.

3905491

Engine Part No.

Cummins 4BT 3.9L
Cummins 6BT 5.9L
Cummins B Series 3.9
Cummins B Series 5.9
Cummins 4B3.9
Cummins 6B5.9
Cummins ISB
Cummins QSB

Interchange No.

FS1280
FF5052
J915240
J904362
84140384
P551329
IT20812
CA3905491

Fitment Vehicles

Komatsu PC200
Hitachi JS140
Hitachi JS200
Sany SY140
Dodge Ram 5.9L Cummins
Case Excavators
Heavy Equipment Loaders

The Cummins 3905491 fuel filter head serves as the mounting base and fuel routing manifold for spin-on fuel filters on B Series engines. Constructed from die-cast aluminum alloy, the housing integrates inlet, outlet, and return ports with threaded filter mounting boss. The assembly includes internal check valves and pressure regulation passages to maintain fuel system priming and prevent drain-back. Designed for direct replacement on Cummins 4BT 3.9L and 6BT 5.9L engines across industrial, agricultural, and light truck applications.

Cross-references include Fleetguard FS1280 and FF5052 filter elements, plus superseded housing numbers 3936315, 3897331, 3915240, 3897327, 3915238, 3904362, and 3903844. Compatible with Case J915240 and J904362 equivalents. Verified fitment on Komatsu PC200, Hitachi JS140/JS200, Sany SY140 excavators and Dodge Ram 5.9L Cummins trucks.