Product Overview

This high-performance Hydraulic Cylinder Tightening Valve (Part Number: 422-00055) is engineered for Doosan DB58 diesel engines, a critical component for maintaining optimal cylinder pressure and engine efficiency. We supply this genuine-quality replacement part globally, with established distribution networks serving major industrial markets across North America, Europe, the Middle East, and Asia-Pacific. Trusted by fleet managers and heavy equipment service centers worldwide for its reliability and precise fit.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications (OEM Size) for a perfect, hassle-free fit and reliable performance in demanding conditions.
• Enhanced Durability: Constructed from high-grade materials to withstand high pressure and thermal stress, ensuring long service life and reduced downtime.
• Optimal Engine Performance: Ensures proper cylinder tightening, which is crucial for maintaining compression, fuel efficiency, and overall engine power output.
• Rigorous Quality Control: Each valve undergoes stringent testing, including video outgoing-inspection, to guarantee it meets performance benchmarks before shipment.
• Cost-Effective Solution: Offers the performance of genuine Doosan parts at a competitive price, providing excellent value for maintenance and repair operations.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM number:

• Doosan: 422-00055

For confirmation, always cross-check your old part’s number and engine model.

Compatibility

This valve is specifically designed for the Doosan DB58 diesel engine. It is a critical component used in a wide range of heavy machinery and vehicles powered by this engine, including:

• Excavators
• Trucks
• Forklifts
• Bulldozers
• Buses
• Loaders
• And other industrial equipment

Global Supply & Distribution

We are a leading supplier of heavy-duty engine components with extensive export experience. Our logistics network ensures efficient worldwide shipping to major ports and industrial hubs.

• Primary Markets Served: North America (USA, Canada, Mexico), European Union, United Kingdom, Australia, Southeast Asia, Middle East, and Africa.
• Fast Delivery: We offer reliable air and sea freight options with consolidated shipping for bulk orders to reduce costs and transit times to key destinations like Los Angeles, Rotterdam, Dubai, and Singapore.
• Trade Compliance: All shipments are prepared with complete and accurate commercial documentation (invoice, packing list, certificate of origin) to ensure smooth customs clearance.

Quality Assurance

Our commitment to quality ensures you receive a part you can install with confidence.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced CNC machinery and strict quality management systems.
• Comprehensive Warranty: Backed by a 6-month warranty against manufacturing defects, covering peace of mind for your investment.
• Testing & Inspection: Every batch undergoes functional testing. A detailed machinery test report and video evidence of outgoing inspection are available to verify product integrity before dispatch.

FAQ

Q1: How can I confirm this part will fit my specific Doosan DB58 engine?
A1: The primary fitment confirmation is the part number. Please verify that the number on your failed valve matches 422-00055. Additionally, confirm your engine’s model plate reads “DB58.” If uncertain, provide us with your equipment’s model and serial number for further verification.

Q2: What is included with the shipment, and is installation guidance provided?
A2: The valve is shipped as a single item, securely packaged. While detailed OEM service manuals are proprietary, we provide basic dimensional and specification sheets. Installation should be performed by a qualified technician familiar with Doosan engine assembly procedures and torque specifications.

Q3: Do you offer technical support and warranty claims for international buyers?
A3: Yes. We provide pre-sales technical support for compatibility questions. Our 6-month warranty is valid globally. In the rare event of a defect, contact us with your order details and photos/videos of the issue for prompt assistance and resolution, including replacement part dispatch.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .