Distributeur hydraulique 4628664 pour midi pelle Hitachi ZX240-3 ZX240LC-3

ZX240‑3 ZX240LC‑3 Control Valve Assy for Hitachi Excavator spare parts 4628664 Distribution Valve Assembly OEM

Product Overview

A 24‑ton excavator sits at the top of the medium class, and owners buy it expecting output close to a 30‑ton machine without the transport weight. That expectation is met through hydraulics: the ZX240‑3 and ZX240LC‑3 rely on their distribution valve, reference 4628664, to divide pump flow efficiently enough between boom, arm, bucket, swing and travel that nothing feels undernourished. When the block is healthy, a well‑operated ZX240‑3 keeps pace with bigger equipment on loading and trenching work. When it leaks internally, that pace disappears first.

The loss is incremental and easy to attribute to the job. The boom sags slightly on a held bucket, so loads get re‑spotted. The arm loses urgency at the bottom of a cut. Swing lands short of the operator's stop. Tracks slow when the bucket is loaded. Each one is leakage between circuits past worn spools. This OEM‑grade assembly replaces the block complete with fresh internals set to Hitachi values, so the worn unit comes off and the replacement goes into the original port positions.

Core Advantages

1. Keeps a 24‑ton machine competing with bigger units
Owners buy this class to match heavier equipment on output. Restored metering returns the pace that makes that comparison possible.

2. Correct pressure reaches the cylinders
Worn spools bleed flow before it does work. Fresh clearances put pressure where the load is, so the arm bites at the bottom of a cut instead of stalling.

3. Loads hold while the truck pulls clear
A sagging boom forces a re‑spot every pass. Renewed retention keeps the bucket where the operator set it.

4. Swing lands on the mark first time
Restored circuit isolation ends the overshoot‑and‑correct habit that costs seconds on every placement.

5. OEM‑grade assembly without dealer pricing
Original units carry import pricing that is hard to justify on a working machine of this age. Equivalent clearances and tested settings at a fraction, with tiered pricing for workshops.

Manufacturing & Quality Control

Spool and bore pairs are machined to print tolerance, matched by size, and hand‑run‑in until full‑stroke movement is smooth without binding. Assembled blocks are flow‑tested circuit by circuit, with relief and compensator values logged against ‑3 figures; units outside window are stripped and corrected before dispatch. Blocks ship internally oil‑fogged, ports capped, and crated on foam.

Frequently Asked Questions

Q1: Does this block fit both the ZX240‑3 and the LC build?
A: The two designations share the platform, but port fittings can differ. Send the machine serial number and a photo of the existing valve tag and we confirm before shipping.

Q2: What symptoms indicate the block rather than the pump?
A: Drift on held loads, slack at stroke start, inconsistent swing and load‑dependent tracking point to the valve. Uniform slowness with hot oil points to the pump. A circuit leak test settles it.

Q3: Is a rebuild kit a viable route?
A: If the casting is sound and has never been rebuilt, a kit can work. Where several circuits leak, a complete assembly usually proves cheaper across the following years. Photos help us judge.

Q4: What hydraulic servicing belongs with installation?
A: Flush the system, renew the return filter, clean the suction strainer, and refill with specified oil. Contaminated oil will damage new clearances quickly.

Q5: Does this fit the ZX240‑5 or ZX250?
A: Not necessarily. Later generations and neighbouring models use different porting and trim. Give us the model and serial and we will identify the right reference.

Q6: What is excluded from warranty?
A: Material and assembly faults are covered. Damage from dirty oil, water ingress, a spool forced against a bind, or reliefs altered outside specification is not. Photograph the packaging before opening if it arrives damaged.