Product Overview

The ZW13H20000 Washer is a genuine OEM component engineered for the Kobelco SK220XD-10 excavator. This precision washer serves multiple critical functions, including distributing load under bolt heads or nuts, preventing surface damage, providing sealing against fluid leakage, and resisting loosening due to vibration.

The Kobelco SK220XD-10 is a 21.8-ton class 10th generation excavator powered by the HINO J05ETG engine, a four-cylinder, 5.123-liter turbocharged diesel with intercooler producing 114-118 kW at 2,000 rpm . This machine incorporates advanced hydraulic technology, including the Arm Interflow System, which achieves up to 19% fuel savings compared to previous models . The machine features an 8-spool main control valve, a hydraulic system operating at pressures up to 34.3 MPa, and sophisticated electronic controls .

Washers like ZW13H20000 are used throughout the excavator in critical applications—engine mounting, hydraulic component attachment, undercarriage assembly, and structural connections. A missing, damaged, or incorrect washer can lead to bolt loosening, joint failure, fluid leaks, or damage to precision-machined surfaces. Installing this OEM washer ensures proper clamp load, vibration resistance, and sealing performance.

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Key Features

• OEM-Grade Material: Manufactured from high-quality steel or hardened material specified by Kobelco for the specific application on the SK220XD-10.

• Precision Dimensions: Manufactured to exact inner diameter, outer diameter, and thickness specifications for the intended bolt size and application.

• Load Distribution: Evenly distributes the clamping force from the bolt head or nut over a larger area, preventing surface indentation and joint relaxation.

• Surface Protection: Protects precision-machined mating surfaces from damage during tightening and under operational vibration.

• Corrosion-Resistant Finish: Treated with appropriate plating or coating to resist rust and corrosion from moisture, chemicals, and job site exposure.

• Vibration Resistance: Maintains clamp load under the high-vibration conditions typical of excavator operation.

• Direct Replacement: Designed to match OEM specifications for hassle-free installation.

• OEM Guarantee: Genuine Kobelco part ensuring perfect compatibility and reliable performance.

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Compatibility

This washer is a direct OEM replacement for the following application:

Excavator Model

• Kobelco SK220XD-10

Additional Compatible Models

• Kobelco SK220XDLC-10

Part Number: ZW13H20000

Brand: KOBELCO (OEM)

Condition: Brand New, OEM Quality

Cross Reference Note: This part number may also be associated with CNH Industrial applications, indicating potential cross-industry use .

Also Known As: Flat Washer, Sealing Washer, Lock Washer, OEM Washer, Hardware Washer

Please verify your machine’s serial number and the specific application of this washer (bolt size, location, and function) by comparing with your original part before purchasing.

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Washer Functions in Excavator Applications

Washers serve several critical functions on heavy equipment like the SK220XD-10:

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Common Washer Applications on SK220XD-10

Based on SK220XD-10 specifications, washers like ZW13H20000 are used in these critical areas:

Engine Mounting

The HINO J05ETG engine in the SK220XD-10 develops up to 592 N-m of torque at 1,600 rpm . Engine mounts use high-strength washers to distribute loads and maintain alignment under torsional stress.

Hydraulic System Components

The hydraulic system operates at pressures up to 34.3 MPa (350 kgf/cm²) with a power boost function reaching 37.8 MPa . Hydraulic pump mounting, valve attachment, and component securing require washers that maintain clamp load under pressure fluctuations.

Undercarriage Assembly

The travel system draws up to 228 kN of drawbar pulling force . Track frame components, roller attachments, and final drive mounting use washers to distribute loads across cast and fabricated structures.

Cab Mounting

The SK220XD-10 cab is mounted on high suspension mounts filled with silicone oil . Cab attachment uses washers to ensure proper clamp load and vibration isolation.

Boom, Arm, and Bucket Pins

The boom, arm, and bucket cylinders are sized at 120mm, 135mm, and 120mm diameters respectively . Pin retention bolts use washers to maintain secure attachment under digging forces of up to 157 kN breakout force .

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Signs Your Washer Needs Replacement

While washers are durable components, they can degrade or become damaged. Replace the ZW13H20000 washer if you observe:

1. Visible Deformation: The washer is bent, flattened, or distorted beyond its original shape.

2. Cracking: Hairline or visible cracks in the washer material indicate fatigue or over-tightening.

3. Corrosion: Severe rust or corrosion that compromises the washer’s thickness or structural integrity.

4. Flattening (for lock washers): The washer has lost its spring tension and no longer provides locking function.

5. Galling or Scuffing: Surface damage that could affect load distribution or sealing.

6. Missing Washer: The original washer is lost or missing during disassembly.

7. During Component Rebuild: When rebuilding hydraulic cylinders, engines, or other major components, always install new OEM washers.

8. After Over-tightening: If a bolt has been significantly over-torqued, the washer may be permanently deformed and should be replaced.

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Benefits

Why choose our ZW13H20000 OEM Washer for your Kobelco SK220XD-10?

1. Ensures Proper Clamp Load: OEM-spec dimensions ensure the washer provides the correct load distribution for the intended bolt and application.

2. Prevents Joint Loosening: Proper washer selection, combined with correct torque, prevents bolted joints from loosening under vibration.

3. Protects Precision Surfaces: Prevents damage to machined surfaces on engine components, hydraulic pumps, and valve bodies.

4. Maintains Component Alignment: Proper washer thickness ensures components remain correctly positioned and aligned.

5. Prevents Fluid Leaks: For sealing washer applications, a new OEM washer restores leak-proof sealing.

6. Essential for Major Service: When performing engine overhauls, hydraulic pump service, or undercarriage repair, new washers are essential for proper reassembly.

7. Reduces Risk of Bolt Failure: Proper load distribution prevents bolt bending or fatigue failure.

8. OEM-Grade Reliability: Genuine Kobelco part ensures correct material hardness, dimensions, and finish.

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Washer Selection Reference

When selecting washers for excavator applications, consider these factors:

By Application Type

By Location on SK220XD-10

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Installation Tips

• Verify Size: Ensure the washer inner diameter matches the bolt size and the outer diameter is appropriate for the application.

• Replace in Sets: When replacing multiple bolts in a joint, replace all washers simultaneously for consistent clamp load.

• Check Orientation: Some washers (conical, spring, sealing) have specific orientation requirements. Verify correct installation direction.

• Use Correct Torque: Washers are designed to function within specific torque ranges. Always follow OEM torque specifications.

• Inspect the Mating Surface: Before installation, ensure the mating surface is clean, flat, and free of damage.

• Don’t Reuse Deformed Washers: Never reuse a washer that shows signs of permanent deformation or fatigue.

• Consider Thread Locking: In high-vibration applications, consider using thread locking compound in addition to proper washers.

• Follow Service Manual: Refer to the Kobelco SK220XD-10 Service Manual (Publication No. S5YN0063E04) for specific washer applications and torque specifications .

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Why Choose Our ZW13H20000 OEM Washer?

We understand that the Kobelco SK220XD-10 is a sophisticated 10th generation excavator that demands precision components for reliable operation. While washers may seem like simple hardware, using the correct OEM-spec component is critical for proper clamp load, vibration resistance, and sealing performance.

Our ZW13H20000 Washer is a genuine Kobelco OEM component, manufactured to the exact specifications required for your SK220XD-10. Whether you are performing routine maintenance, rebuilding a major component, or completing a machine overhaul, this OEM washer provides the precise fit and reliable performance your machine requires.

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Technical Specifications

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Order your ZW13H20000 Washer today and ensure proper bolted joint integrity for your Kobelco SK220XD-10 excavator. In stock and ready for immediate worldwide shipping. Bulk pricing available for hardware kits and fleet maintenance.

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