عجلة مشط التبن لـ حفارة متوسطة الحجم Hitachi EX200-1 EX200-2

EX200‑1 EX200‑2 Control Valve Assy for Excavator spare parts Hydraulic Main Valve Aftermarket

Product Overview

When an EX200‑1 or EX200‑2 needs a hydraulic block, the first option in most markets is a take‑out unit from a breaker machine — cheaper, immediately available, and usually the same age as the one being replaced. That is the trap: a used valve carries the same wear it accumulated in its previous machine, so the "repair" often reproduces the original fault within a season. The alternative is a new assembly, and this listing covers the block for both early generations of the 20‑ton Hitachi, ported and trimmed for boom, arm, bucket, swing and travel flow division.

Wear on these machines presents as softness rather than failure. The boom sags on a held bucket, so loads get re‑spotted. The arm skips at stroke start. Swing lands short. Tracks bog when the bucket is loaded. Those symptoms come from spools and bores worn enough to let oil cross between circuits. This aftermarket hydraulic main valve replaces the assembly complete with fresh internals, so the tired unit comes off in one piece and the replacement fits the original port positions.

Core Advantages

1. Avoids repeating a used part's wear
A take‑out block brings its own history. A new assembly starts with fresh clearances rather than someone else's hours.

2. Two generations covered in one listing
The ‑1 and ‑2 machines share enough of the platform that one matched assembly serves both. We confirm the configuration from your tag and serial.

3. Loads stay where the operator placed them
Drift on a held bucket forces constant lever pressure. Fresh spool pairs keep the bucket steady during inspection.

4. Swing placement becomes reliable
Restored circuit isolation puts the house where the lever stopped it, ending the double‑input habit.

5. Keeps serviceable old machines working
These early EX200s have structure left in them. A tested block is a cheaper decision than replacing a machine that still digs well.

Manufacturing & Quality Control

Spool and bore pairs are machined to suit the original bore sizes, matched, and hand‑run‑in until full‑stroke movement is smooth without binding. Assembled blocks are flow‑tested circuit by circuit with relief values recorded for the early platform; out‑of‑window units are stripped and corrected. Blocks ship internally oil‑fogged, ports capped, and crated on foam.

Frequently Asked Questions

Q1: How do I confirm this fits my EX200‑1 or ‑2 without a part number?
A: Send photos of the existing valve, including port layout and mounting face, plus the machine serial plate. On machines this age the tag is often gone, so we match on configuration.

Q2: Is a used take‑out valve a reasonable cheaper option?
A: Only if you can verify its condition. Most used blocks carry wear similar to the one being replaced, which means the same fault returns. A new assembly removes that risk.

Q3: What symptoms indicate valve wear?
A: Boom drift on held loads, slack at stroke start, inconsistent swing placement, and tracking that reacts to bucket load. A circuit leak test confirms.

Q4: Can my existing block be rebuilt?
A: Possible if the casting is sound, but part availability limits these older units. Send photos and we will say honestly whether a kit exists or replacement is the practical route.

Q5: What hydraulic servicing accompanies installation?
A: Flush the system, renew the return filter, clean the suction strainer, and refill with specified oil. On older machines, hose and fitting condition often needs attention too.

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 crate before opening if damage is visible.