Troubleshooting ZF 4BP230 Proportional Solenoid Valves (Y1-Y6): Part Specs and Sourcing Guide

Introduction: The Precision of Hydraulic Control

The ZF 4BP230 transmission achieves its smooth shifting by using 6 proportional solenoid valves (Y1-Y6)⁴². These valves, located in the HCU (Hydraulic Control Unit), precisely control the 16+2 bar system pressure to engage the 6 clutch packs. Failure of a single solenoid leads to harsh shifting or complete gear loss.

As a 20-year technical expert in ZF transmission repair, Tianjin XiaoHang Construction Machinery Co., Ltd. provides this guide for diagnosing and sourcing these critical electronic parts.

Section 1: Technical Specifications and Diagnosis

Key Data for Technicians

Our 20 years of repair data confirm these key specifications for the 4BP230 solenoids:

• Type: Proportional Solenoid Valve
• Operating Voltage: 24 V
• Resistance (at 20°C): 19 $\Omega$ (Ohms)
• Operating Current: 100 – 500 mA

A technician can diagnose a faulty solenoid by checking its resistance. If the value is far from 19 $\Omega$, the solenoid is damaged and must be replaced⁴⁷.

Section 2: Sourcing Verified Solenoid Valves

The XiaoHang Quality Guarantee

The 4BP230 HCU (part of assembly [4660.159.024]) requires high-quality replacement solenoids. XiaoHang Machinery Co., Ltd. supplies verified proportional solenoid valves that meet the exact 19 $\Omega$resistance and current specifications.

• Fast Lead Times: We maintain a strong inventory of these high-demand electronic components.
• Cost Efficiency: Our China-based supply chain ensures competitive pricing for these high-tech valves.

Conclusion: Restore Your Shifting Quality

Don’t let a faulty solenoid stop your machine. Trust Tianjin XiaoHang Construction Machinery Co., Ltd. for verified 4BP230 proportional solenoids and the technical data to support your diagnosis.

Contact our International Sales Team today for immediate quotes and technical support.