7N1903 Inner Valve Spring Fits Caterpillar Industrial Construction Models
7N1903 Inner Valve Spring Fits Caterpillar Industrial Construction Models
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One New Aftermarket Replacement Inner Valve Spring Fits Caterpillar (Fits CAT) 3500 Series Industrial and Construction Engines
This aftermarket replacement inner valve compression spring installs in the cylinder head of Fits Caterpillar 3500-series diesel and gas engines, working alongside the outer valve spring to maintain consistent valve closure against the seat. The inner spring helps isolate vibration and ensures reliable valve train operation across both intake and exhaust positions. Fits Caterpillar OEM part number 7N-1903.
Specifications
- Free Length: 51.54mm
- Maximum Solid Length: 28.68mm
- Application: Intake and exhaust valves
- Position: Inner (used in conjunction with outer spring 7N1904)
Compatible Engine Models
Fits Caterpillar Industrial / Gen Set / Diesel Engines: 3508, 3508B, 3508C, 3512, 3516, 3516B
Fits Caterpillar Natural Gas Engines: G3508, G3508B, G3512, G3512B, G3516, G3516B, G3520B
Fits Caterpillar Power Modules: PM3508, PM3512, PM3516, PMG3516
Fits Caterpillar Locomotive Engines: 3508, 3512, 3516
Fits Caterpillar Marine Engines / Marine Auxiliary: 3508, 3512, 3516, 3516B
Fits Caterpillar Vehicular Engines: 3512, 3516
Fits Caterpillar Track-Type Tractors: D11N, D11R
Fits Caterpillar Wheel Loaders: 994
Fits Caterpillar Off-Highway Trucks: 777B, 777C, 785, 785B, 789, 789B, 793, 793B
Fits Caterpillar Mining Excavators: 5130, 5230
Replaces Part Number(s):
7N1903, 7N-1903, ENL80-0175
New aftermarket replacement part - not remanufactured, not used.
