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USA Lab UC/DLSB-5/10 Series Chiller Pump Replacement Guide

This guide walks through the full pump removal and replacement process for UC/DLSB-5/10 chillers. It includes panel removal, tubing disconnection, insulation removal, pump unbolting, wiring disconnection, and reinstallation steps. A separate section covers ripped tube replacement if damage occurs during removal.

Link to USA Lab UC/DLSB-5/10 Series Chiller Pump Replacement Guide

Required Tools

  • Snips
  • Zip-ties
  • 4mm ball-end Allen wrench
  • Flat driver
  • Adjustable wrench
  • Phillips driver
  • Needle-nose pliers
  • Spray adhesive

Optional:

  • Spare silicone tubing
  • Knife
  • 10mm wrench
  • Mini adjustable wrench
  • Drill or low-torque impact drill
  • Foil/metal tape

STEP 1 — Remove the Front Panel

  • Remove the four screws securing the front panel. (Shown on page 2.)

STEP 2 — Remove the Top Panel

  • Remove six additional screws plus one large nut securing the top panel.
  • Once removed, the interior becomes accessible. 

STEP 3 — Remove the Inlet Line on the Side Panel

  • Cut 2–3 zip-ties and pull back the insulation around the inlet line.

STEP 4 — Loosen the Hose Clamp & Remove the Tube

  • Loosen the hose clamp and carefully remove the tubing from the barb.
  • If the tube rips, follow the Ripped Tube Replacement Instructions later in this guide.

STEP 5 — Remove the Pump Side Panel

  • Remove the two bottom screws to detach the panel.

STEP 6 — Remove Insulation Wrap on Pump

  • Carefully unwrap the insulation. Remember how it was originally wrapped for reinstallation.

STEP 7 — Cut Zip-Ties on Pump Inlet Insulation

  • Cut 2–3 zip-ties, similar to step 3.
  • Important: Do not lose the white O-ring.

STEP 8 — Remove Lower Hex Bolts

  • Remove the two lower 4mm hex head bolts (do not remove the upper bolt).

STEP 9 — Disconnect Pump Wiring

  • Begin at the power box and remove the pump wiring.

STEP 10 — Remove the Capacitor and Pump

  • Detach the capacitor from the tank wall and lift the pump out of the unit.

STEP 11 — Remove Shipping Housing From Replacement Pump

  • The replacement pump arrives with a temporary housing that is the incorrect size—it is only for protection during shipping.
  • Remove this housing from the pump and impeller.

STEP 12 — Install Factory Housing on New Pump & Reinstall

  • Reinstall the factory housing onto the new pump and impeller.
  • Reverse the removal steps to reinstall the pump.
  • Additional required actions:
    • Replace all cut zip-ties.
    • When re-wrapping insulation, use spray adhesive to bond the ends.

Ripped Tube Replacement Instructions

(Only required if the tubing was damaged during Step 4.)

  1. Cut remaining zip ties and remove the insulation.
  2. Remove the hose clamp and the damaged tube.
  3. Add a new hose section and tighten the hose clamp.
  4.  Slip on insulation if possible.
    1. If needed,  cut lengthwise.
  5. Push the other end of the hose onto the barb and reinstall the hose clamp.
  6. Tape cut insulation areas and re-zip-tie.
  7. Now you can continue the reinstallation process from steps 3 to 1.

Contact & Support

For assistance or questions:

📞 734-855-4890
📧 support@usalab.com