1260 infinity binary pump leak flow issue

Hello. We have issues with the 1260 infinity binary pump (1260 iso pump, G1310B). It is a DMF GPC-MALS system. We are currently washing the whole system using ACS Certified DMF, and the column is not involved now. DMF goes through the degasser (1200 series, G1322A) first and then goes into the pump. There are 4 channels in the degasser. DMF can go through channels  A, B, and C but cannot go from D to the pump. We are pretty sure the degasser is functioning well. We ran a diagnosis of the pump and it says the pump is leaking as the picture shows. What can we do to fix the pump?

  • Understanding the Problem

    • Degasser Functionality: If DMF passes through channels A, B, and C of the degasser but not D, and you're confident the degasser is functioning well, the issue may not be with the degasser itself but possibly with the tubing or connections leading to the pump, or with the pump's internal components.
    • Leakage Diagnosis: The diagnostic message indicating a leak in the pump suggests that the problem might be related to worn or damaged seals, pistons, or other internal components of the pump that are in contact with the solvent.

    Troubleshooting Steps

    1. Inspect Tubing and Connections:

      • Check all tubing and connections between the degasser channel D and the pump for blockages, leaks, or damage. Replace any faulty tubing or fittings.
    2. Check for Blockages:

      • Ensure there is no blockage in the pathway from the degasser to the pump. Sometimes, particulate matter from solvents or previous samples can cause blockages.
    3. Pump Maintenance:

      • Seals and Pistons: The message about the pump leaking is a strong indicator that maintenance is required. This often involves replacing the seals and possibly the pistons if they are worn or damaged.
      • Check Valves: Inspect the inlet and outlet check valves for blockages or wear. These can also contribute to leakage issues.
      • Maintenance Kit: Agilent offers maintenance kits for their pumps that include all the necessary parts for routine maintenance, such as seals, pistons, and check valves. Consider purchasing a maintenance kit specific to the 1260 Infinity Binary Pump (G1310B).
    4. Follow the Pump Maintenance Procedure:

      • Refer to the Agilent 1260 Infinity Binary Pump user manual for detailed instructions on performing maintenance tasks such as replacing seals, pistons, and check valves. The manual will provide step-by-step guidance on how to disassemble the necessary components, replace the parts, and reassemble the pump.
    5. System Flush:

      • After any maintenance, flush the system thoroughly with a solvent that is compatible with both DMF and the system components to ensure that any residual particles or contaminants are removed.
    6. Professional Service:

      • If the issue persists after these troubleshooting steps, or if you are not comfortable performing the maintenance yourself, it may be best to contact Agilent Technologies for professional service. A certified technician can diagnose and resolve issues that may not be apparent without in-depth knowledge of the system.
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