PT301 Cummins Injector Leakage Tester Air Bubble Seal Check

The PT301 CUMMINS Injector Leak Tester is a critical diagnostic device detailed in your provided manual. It acts as a "Gatekeeper" for injector quality, determining if an injector housing and plunger seal are tight enough to function before flow calibration.

• Testing Capability: It performs three specific tests:

1. Barrel-to-Plunger Leakage: Checks the fit of the plunger within the injector body.

2. Tip Seat Leakage: Verifies the seal between the plunger tip and the nozzle cone (cup).

3. Check Ball Leakage: (With updated plumbing) Tests the internal check ball seal.

• Precision Measurement: Features a highly sensitive Air Flowmeter (Bubble Checker) and a Load Cell Gauge (0-200 lbs) to simulate the mechanical pressure exerted by the engine cam.
  

  
  

• High Sensitivity: The bubble checker method can detect microscopic air leaks that fluid testers might miss, ensuring reliable engine starting.

• Load Simulation: The built-in load cell allows the operator to apply exactly 200 lbs of force to check the cup-to-plunger seating, mimicking real-world stress.

• Versatility: Compatible with Flange Type (PT) and Cylindrical (PT-D/E) injectors via interchangeable adapters and links.

• Altitude Compensation: The manual notes this device is sensitive to altitude; the readings can be corrected (0.2 units per 1000ft) to ensure accuracy anywhere in the world.
  

  
  

  
  

• FAQ:

• Q: What does it mean if bubbles appear in the checker?

• A: Continuous bubbles indicate a leak in the plunger seat or barrel. The manual specifies acceptable bubble intervals (e.g., >5 seconds between bubbles).

• Q: Can I use shop air?

• A: Yes, but it must be clean and regulated to at least 80 psi. The unit has filters, but dry air is preferred.