Printpartsummary
Symptoms:
  • Delayed engagement
  • Low line pressure
  • No movement until RPM increased
  • Pump noise
Cause:

The pump flow control canister and plunger valve wear, allowing the plunger valve to stick open and/or leakage to occur. The canister o-ring relaxes and pressure bleeds past it.

Correction:

This drop-in-place assembly includes a harder canister with more support for the plunger valve, which prevents sticking. The assembly also includes a case-hardened plunger valve with self-centering annular groves, a replacement spring, and larger O-ring for improved sealing.

5R55N, 5R55S, 5R55W

Pump Flow Control Valve Kit

Part No.

56200-03K

Pump Flow Control Valve Kit
  • 56200-03k_combo

  • Pump Flow Control Valve Kit

Small_56200-03k_combo Small_56200-03k

5R55N, 5R55S, 5R55W

Pump Flow Control Valve Kit

Part No. 56200-03K

  • Valve Assembly
  • O-Ring

Drop in replacment

Complaint:

  • Delayed engagement
  • Low line pressure
  • No movement until RPM increased
  • Pump noise

Cause:

The pump flow control canister and plunger valve wear, allowing the plunger valve to stick open and/or leakage to occur. The canister o-ring relaxes and pressure bleeds past it.


Correction:

This drop-in-place assembly includes a harder canister with more support for the plunger valve, which prevents sticking. The assembly also includes a case-hardened plunger valve with self-centering annular groves, a replacement spring, and larger O-ring for improved sealing.

The OE flow control valve is designed to increase pump efficiency by rerouting excess line pressure back to the suction side of the pump. It is common for the plunger valve to become stuck open, or for the canister to wear. This decreases line pressures and results in delayed engagements. The Sonnax pump flow control valve assembly eliminates the sticking and wear problems with redesigned and precisely machined parts.

  • Harder canister material resists wear and has improved valve support to prevent sticking.
  • Plunger valve is made from case-hardened steel and has annular grooves to prevent side loading.
  • Larger O-ring eliminates pressure loss at the pump face.
  • Canister restores the regulated line orifice to improve valve and hydraulic stability.
  • Drop-in-place replacement assembly for easy installation.
NOTE:

Product supersedes 56200-02K

Click here to view PDF if instructions do not appear below.

It appears you don't have a PDF plugin for this browser. Click here to view the PDF file.

Contact a Sonnax Distributor to purchase this part.