Hydraulic lock for the XCMG QY25K5 boom lift cylinder XZZX-B203

Product Introduction

This XZZX-B203 hydraulic lock is a critical safety hydraulic component matched for the boom lift cylinder of XCMG QY25K5 truck crane. It adopts double pilot operated check valve structure. When the boom stops at the required height, the hydraulic lock instantly seals the oil circuit of the lifting cylinder, locking the boom position reliably and avoiding boom sinking caused by pressure leakage, which greatly improves safety during lifting operations.

The valve body is made of high-strength alloy steel with precision internal machining. It can sustain high working pressure and has good sealing performance under alternating loads. The internal valve core is ground with high precision to minimize internal leakage. The inlet and outlet ports follow OEM layout standards, easy to connect with boom cylinder pipelines. The outer protective paint is wear-resistant and anti-corrosive, adapting to the complex working environment of construction sites. It responds quickly during pilot oil control, realizing smooth unlocking and boom movement without stuck or delayed action.

Manufactured strictly in accordance with OEM dimensional standards, this hydraulic lock can directly replace original spare parts without modification. We supply OEM equivalent and premium aftermarket quality grades. Every finished hydraulic lock undergoes pressure sealing test and functional inspection before shipment. Export-grade packaging and complete customs documents are available for overseas construction machinery repair shops and equipment distributors.

Key Features

• Part number: XZZX-B203, hydraulic lock compatible with XCMG QY25K5 boom lift cylinder
• Double pilot operated check valve structure for reliable position locking
• High pressure resistance, low internal leakage, effectively prevent boom sinking
• Precisely ground valve core, stable opening and closing response
• Alloy steel valve body, wear and corrosion resistant
• Standard oil port layout, simple pipeline assembly
• OEM matched size, direct replacement
• In stock, factory direct export, mixed container loading available

Why Choose Our XZZX-B203 Hydraulic Lock

1. Professional Construction Machinery Hydraulic System Parts Specialization

We specialize in full-range hydraulic valves and safety components for XCMG truck cranes. Our team masters hydraulic lock working principle and pipeline matching requirements, providing accurate part matching and professional technical guidance for crane hydraulic overhaul projects.

2. Strict Pressure & Sealing Performance Control

All hydraulic locks pass high-pressure sealing testing. Each unit is checked for external leakage, internal leakage and pilot unlocking function, eliminating hidden risks such as slow boom drop, oil seepage and valve core failure.

3. Multiple Quality Grades for Global Market

We offer OEM equivalent and premium aftermarket versions to meet different procurement demands. OEM equivalent products match original structural performance and dimensions completely. The aftermarket option provides cost-effective replacement for regular fleet maintenance, both with stable quality guarantee.

4. Ready Stock & Fast Shipment

We maintain abundant spot inventory of XZZX-B203 hydraulic locks. Products are sorted by part number for quick picking. We support shipment within 3–7 working days and mixed loading with other crane spare parts to cut logistics expenses.

5. Export-Grade Packaging & Full Set Documents

The hydraulic lock is packed with anti-rust treatment and shockproof cartons to protect valve ports and internal precision parts during long ocean transport. Our foreign trade team provides complete customs documents including packing list, commercial invoice and inspection certificate for smooth import clearance.

6. Rich Global Export Service Experience

We serve worldwide construction machinery dealers and maintenance teams. We provide pre-sales part verification and responsive after-sales support, solving compatibility problems promptly and establishing long-term stable cooperative relationships.