1645590 Valve A Fits Caterpillar Models

One New Aftermarket Replacement Fluid Sampling Valve (GP) for Caterpillar (Cat) Equipment

This aftermarket replacement Caterpillar 1645590 Valve GP-Fluid Sampling is used for Scheduled Oil Sampling (SOS) -- the quick-disconnect port fitting that allows fluid samples to be drawn from engine oil, hydraulic, or drivetrain circuits for lab analysis without system shutdown. The valve features a STOR male-thread design in brass construction, and threads in at 7/16 in-20 external thread. Keeping this valve in good working condition is essential for accurate oil analysis and proactive maintenance programs on Caterpillar equipment.

Specifications

• Thread: 7/16 in-20 external (STOR male thread)
• Material: Brass
• Hex size: 0.625 in. (15.88 mm)
• Overall length: 1.49 in.
• Weight: approx. 0.2 lbs.
• Dimensions: 3.5 x 6 x 0.08 in.

Compatible Models

Caterpillar Motor Graders: 12H, 12K, 14H, 16H, 120H, 120H ES, 120H NA, 120K, 120K 2, 130G, 135H, 135H NA, 140H, 140K, 140K 2, 143H, 160H, 160K, 163H

Caterpillar Skid Steer / Multi-Terrain Loaders: 216B, 216B3, 226B, 226B3, 232B, 236B, 236B3

Caterpillar Telehandlers and Articulated Trucks: 725, 730, 735, 740, D250B, D250D, D250E, D250E II, D25D, D300D, D300E, D300E II, D350E, D350E II, D400E, D400E II, D40D

Caterpillar Forestry/Feller Bunchers: 1090, 1190, 1190T, 1290T, 1390, 2290, 2390

Note: This valve fits a very wide range of Cat equipment across multiple product families. Verify your specific machine's fluid sampling port thread spec (7/16 in-20) before ordering.

Replaces Part Number(s):

1645590

Aftermarket Interchange Numbers

8C3446, 8C-3446, 3218649

New aftermarket replacement part - not remanufactured, not used.