Model No.
56501 (SAE #6 5/8 - 18 UNF thread)
56501 (SAE #8 3/4 - 16 UNF thread)
56501 (SAE #10 7/8 - 14 UNF thread)

All fittings are 45 degree flared.

How Does It Work?

The indicator monitors the suction side fuel filter on diesel engines. The yellow position indicator progressively fills the window as fuel filter restriction increases, locking at the highest restriction. The fuel filter should be changed when the indicator reaches the red zone.

Specifications

• Operating Temperature: -40 to +250°F (-40 to +121°C)
• Calibration: 6, 8.5, 10 and 12" Hg (20, 29, 34 and 41 kPa) at red zone
• Accuracy: ±10%
• Material: Chemical resistant nylon

Dimensions (Indicator only)

• Length: 63.7 mm
• Diameter: 32 mm
• Port: 1/2 - 20 Straight thread o-ring