Excavator Crankshaft Pulley Bushings

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MYWAY Bushings for Excavator Crankshaft Pulley

Single Groove For 396-454 (5.25" OD) Moroso 64200 Crankshaft Pulley Replacement

3 4 7 8 Shaft Adapter,Bearings, Bearing Shells, And Bushings 3 4" To 7 8" Engine Pulley Crank Shaft Sleeve Adapter Bushing

Crankshaft Pulley Dorman 594-187 Engine Harmonic Balancer Compatible

Baum Tools 3266 Front Crank Pulley Seal Installer

Crank Shaft Pulley Genuine #13521-74040 Crankshaft Pulley

Millway Motorsport F20 F22 F30 F32 Front Wishbone Inner Bushings

Crank Pulley T10531 Vibration Damper Holding Tool Crankshaft Pulley For EA888

Crankshaft Pulley VR RACING Racing Light Weight Aluminum For 99 00 Civic Si 94 01 For Crank Pulley Socket

Matching Crankshaft Pulley Models

Model	Pictures	OEM No.	Outer Dia (mm)	Bore Dia (mm)	V-belt Type	N.W (kgs)	Remark
CH-CKS001	Available	1001-1	158.8	16.5	Flat		Crankshaft Pulley Shell
CH-CKS002	Available	3001-1	171.9	128	PK6/PK4		Crankshaft Pulley Shell
CH-CKS003	Available	8002	192.5	122.5	PK6		Crankshaft Pulley Shell
CH-CKS004	Available	8005	161.5	62	PK6		Crankshaft Pulley Shell
CH-CKS005	Available	8009	169	71.6	PK6		Crankshaft Pulley Shell
CH-CKS006	Available	CH-H-A012	138.4	34.4	Flat		Reinforced Support Cover
CH-CKS007	Available	L183-01	167.3	125.7	PK6		Outer Ring
CH-CKS008	Available	L183-03	149.8	5	Flat		Support Cover
CH-CKS009	Available	CH-H-1502	162	60.3	PK6		Shell
CH-CKS010	Available	CH-H-1502	109	30	Flat		Outer Support Cover
CH-CKS011	Available	CH-H-1502	82	30	Flat		Inner Support Sleeve
CH-CKS012	Available	DZB12-001-01	167	125.5	PK6		Outer Sleeve
CH-CKS013	Available	DZB12-001-02	149.2	50	Flat		Upper Support Cover
CH-CKS014	Available	DZB12-001-04	104.5	5			Inner Support Sleeve
CH-CKS015	Available	DZB12-001-05	142	7			Lower Support Cover
CH-CKS016	Available	DZB17-007-02	172	127	PK6
CH-CKS017	Available	DZB20-020-02	166	74	PK7		Outer Sleeve
CH-CKS018	Available	DZB08-016B-02	151.5	70	PK6		Outer Sleeve
CH-CKS019	Available	CH-H-6035-2	83.6	32	Flat		Pulley Hub
CH-CKS020	Available	DZB03-035-02	155	105	PK6		Outer Sleeve
CH-CKS021	Available	DZB08-005B-02	155	59.5	PK7		Outer Sleeve
CH-CKS022	Available	DZB09-001-03	162.2	60	PK6		Outer Sleeve
CH-CKS023	Available	DZB09-007-03	161.8	60	PK6		Outer Sleeve
CH-CKS024	Available	DZB11-006-02	158	93	PK6		Outer Sleeve
CH-CKS025	Available	DZB11-012-02	172.5		PK6
CH-CKS026	Available	DZB11-014	160	26	PK5	0.893
CH-CKS027	Available	DZB12-008-02	137	83	PK6		Outer Sleeve
CH-CKS028	Available	DZB12-011-02	154	103	PK6		Outer Sleeve
CH-CKS029	Available	DZB14-001-02	169	88	PK6		Outer Sleeve
CH-CKS030	Available	DZB17-007-02	172	127	PK6
CH-CKS031	Available
CH-CKS032	Available	DZB17-010	157	15	PK6
CH-CKS033	Available	NH1563P	143	34	PK6
CH-CKS034	Available	CH-EX1, EX1283	106	45
CH-CKS035	Available	CH-EX2, EX1462	106	73.3
CH-CKS036	Available	CH-EX3, EX1463	160	105.7
CH-CKS037	Available	CH-EX4, EX1488	156.5	96
CH-CKS038	Available	CH-EX5, EX1101	144.3	103
CH-CKS039	Available	EX1346	154	93
CH-CKS040	Available	EX1382	161.9	105
CH-CKS041	Available	EX1386	163.2	98
CH-CKS042	Available	EX1489
CH-CKS043	Available	EXO1446	121	59
CH-CKS044	Available	EXI1445	107.3	59.3
CH-CKS045	Available	EXI1446	107	59
CH-CKS046	Available	EXO1429	121	59.15
CH-CKS047	Available	EX1196	120	72
CH-CKS048	Available	EX1387	146	81.7
CH-CKS049	Available	EX1496	158.5	58.7
CH-CKS050	Available	EX1667	163.2	81.6
CH-CKS051	Available	EX1668	163.2	101
CH-CKS052	Available	EX1670	163.2	98
CH-CKS053	Available	EX1778	163.1	94
CH-CKS054	Available	EX1784	235	131.5
CH-CKS055	Available	EX1812	177.8	103.6
CH-CKS056	Available	EXO1434	130	59
CH-CKS057	Available	FH159-03-01	120	38.2	Flat
CH-CKS058	Available	FH159-03-03	66	60	Flat
CH-CKS059	Available	FH159-03-04	153.6	128.5	Flat
CH-CKS060	Available	FH166-01-01	93.5	30.5	Flat
CH-CKS061	Available	FH166-01-03	166	96.5	Flat
CH-CKS062	Available	FH166-01-06	151.8	70	PK6
CH-CKS063	Available	FH169-01-01	127	29	Flat
CH-CKS064	Available	FH169-01-04	169	71.6	PK6
CH-CKS065	Available	FH169-01-05	103	30.6	Flat
CH-CKS066	Available	FH182-01-01	152	38.2	Flat
CH-CKS067	Available	FH182-01-03	66	38.2	Flat
CH-CKS068	Available	FH182-01-04	172	126.1	PK6
CH-CKS069	Available	FH182-02-01	152	38.2	Flat
CH-CKS070	Available	201481-00-01	117.9	30	Flat	0.467	Tuopu
CH-CKS071	Available	104020C-00-41	161.8	61	PK6		Tuopu
CH-CKS072	Available	10317014-00-30	172	125	PK6	0.914	Tuopu
CH-CKS073	Available	10317012-00-70	143.5	62.8	PK6	0.602	Tuopu
CH-CKS074	Available	10217002-00-20	154	27	PK5		Tuopu
CH-CKS075	Available	10406301-00-21	167.2	125	PK6	0.505	Tuopu
CH-CKS076	Available	10912011-00-60	169.3	87.8	PK6	0.95	Tuopu
CH-CKS077	Available	10928003-00-10	169	71	PK6	1.075	Tuopu
CH-CKS078	Available	20102321-00-20	172.6	94.1	Flat	1.042	Tuopu
CH-CKS079	Available	20102321-00-40	84.9	24	Flat	0.479	Tuopu
CH-CKS080	Available	20102322-00-80	88.3	34	Flat	0.598	Tuopu
CH-CKS081	Available	20317028-00-30	117.6	35	Flat	0.432	Tuopu
CH-CKS082	Available	20317029-00-30, 10400082	197	38.2 (+0.05)	Flat		Welding Assembly
CH-CKS083	Available	20317029-0060, 10400085	172	125.2	PK6	0.646	Ring Gear
CH-CKS084	Available	10915079-00-23, 10402093	155	62 (+0.1/-0)	PK6	0.68

4000+ Types of Excavator Crankshaft Pulley Bushings – Contact Us for Details

Crankshaft Pulley Bushing: A Comprehensive Technical Guide

1 Understanding the Crankshaft Pulley Bushing

The crankshaft pulley bushing, also known as a crankshaft sleeve adapter or shaft bushing, is a precision-engineered component that plays a critical role in engine performance and power transmission systems. This seemingly simple part serves as an interface between the crankshaft and pulley, ensuring proper alignment, reducing vibration, and protecting against wear. At its core, a bushing is a sleeve-bearing component designed to provide a protective barrier between moving parts .

In mechanical systems, bushings function as sliding bearings where shafts rotate or slide within their bore. The crankshaft pulley bushing specifically addresses the challenge of adapting pulley sizes to crankshaft dimensions, particularly when replacing components or modifying engine systems. For instance, the common design that “adapts a crankshaft from 3/4” to 7/8” diameter” demonstrates how these bushings provide cost-effective compatibility solutions without requiring complete motor or pulley replacement.

The fundamental importance of the crankshaft pulley bushing lies in its ability to maintain optimal alignment under various operational conditions. As one technical description explains, these components “restore the proper alignment and stability of the crankshaft pulley assembly, which is crucial for maintaining optimal engine performance.” Without this critical component, engines would experience accelerated wear, vibration issues, and potential damage to more expensive components.

2 The Critical Role of Crankshaft Pulley Bushings in Engine Performance

2.1 Vibration Dampening and Alignment

The crankshaft pulley bushing serves multiple essential functions in engine operation, with vibration reduction standing as one of its primary contributions. During engine operation, the crankshaft experiences torsional vibrations from combustion forces and inertial movements. The bushing, often incorporating specialized materials or design features, helps absorb and dissipate these vibrations before they transfer to other engine components. This dampening effect not only improves comfort but also extends the lifespan of connected components such as alternators, water pumps, and power steering systems.

Another crucial function is maintaining precise alignment between the crankshaft and accessory pulleys. Proper alignment ensures that belts run true and maintain correct tension, preventing the premature wear and failure that often occurs with misaligned systems. As noted in product descriptions, these bushings “restore the proper alignment and stability of the crankshaft pulley assembly,” addressing the wobbling issues that users sometimes report after engine work.

2.2 Wear Protection and Compatibility Enhancement

The protective function of crankshaft pulley bushings cannot be overstated. By creating a dedicated wearing surface between the crankshaft and pulley, the bushing sacrifices itself to protect these more expensive components. This approach recognizes that “when the wear progresses to a certain level, you can extend the service life by replacing the bushing, which is more convenient and economical than replacing the more expensive shaft or seat” . This design philosophy makes the bushing a cost-effective maintenance solution that prevents more extensive damage.

Additionally, these bushings provide invaluable adaptation capabilities in various scenarios. They enable mechanics to “adapt larger wheel bores to smaller axles” or “alter motors with different diameter shafts,” significantly enhancing the compatibility between existing components. This functionality is particularly valuable when replacing engines or modifying power transmission systems, as it “reduces the necessity of buying a new motor or pulley to maintain existing components and speed/power requirements.”

3 Types and Materials of Crankshaft Pulley Bushings

3.1 Material Composition and Properties

Crankshaft pulley bushings are manufactured from various materials, each offering distinct advantages for specific applications:

Bronze/Copper Alloys: Traditional bushing materials known for their excellent wear resistance and load-bearing capabilities. These materials often incorporate solid lubricants like graphite for improved performance. Bronze bushings are particularly valued for their durability under high-load conditions and compatibility with steel shafts.
Steel and Stainless Steel: Offering high strength and corrosion resistance, steel bushings are suitable for high-load applications. As seen in product listings, stainless steel variants provide enhanced resistance to environmental factors, making them suitable for demanding operating conditions .
Aluminum Alloy: Noted for being “lightweight” while maintaining “high durability,” aluminum alloy bushings provide a favorable strength-to-weight ratio. This material is particularly advantageous in applications where weight reduction is a priority without compromising strength.
Polymer Composites: Modern polymer bushings incorporate materials like PTFE (Polytetrafluoroethylene) for self-lubricating properties. These advanced materials “eliminate the need for external grease or oil, making these bushings truly maintenance-free solutions” while offering excellent chemical resistance.
Cast Iron: Used in specific applications like taper lock bushings, cast iron provides exceptional strength and wear resistance for high-torque situations .

3.2 Comparison Table: Bushing Materials and Characteristics

Material Type	Load Capacity	Wear Resistance	Corrosion Resistance	Temperature Limit	Best Application
Bronze/Copper Alloy	High	Excellent	Moderate	Moderate	High-load, low-speed applications
Steel	Very High	Excellent	Low (unless stainless)	High	High-torque, precision applications
Aluminum Alloy	Moderate	Good	Good	Moderate	Weight-sensitive applications
Polymer Composite	Low-Moderate	Excellent	Excellent	Low-Moderate	Chemical environments, maintenance-free needs
Cast Iron	High	Excellent	Low	High	Industrial, high-torque applications

4 Identifying and Troubleshooting Bushing Failure

4.1 Common Symptoms of Bushing Wear

Recognizing the early signs of bushing failure can prevent more extensive damage to engine systems. Key indicators include:

Visible Pulley Wobble: As described in a user experience, “watching the crank pulley while the engine was running and noticed it wobbling slightly” often indicates bushing wear or failure. This misalignment typically results from uneven wear within the bushing surface.
Premature Belt Failure: Repeated belt wear or shredding, particularly when “the water pump and alternator belts started tearing apart and shredding,” can signal alignment issues caused by bushing wear. This problem often persists despite belt replacement until the underlying bushing issue is addressed.
Increased Vibration and Noise: Worn bushings lose their ability to effectively dampen vibrations, resulting in increased operational noise and harmonic vibrations throughout the engine system. This symptom typically worsens as wear progresses.
Visible Wear Patterns: Upon inspection, worn bushings may show uneven wear patterns, scoring, or visible damage to the bearing surface. In severe cases, the bushing may have visible cracks or deformation.

4.2 Root Causes and Solutions

Understanding why bushings fail helps prevent recurrence:

Improper Installation: Using incorrect installation techniques can cause immediate bushing damage or premature wear. Proper installation requires “using proper installation tools that apply pressure evenly across the bushing face” rather than forcing it into place unevenly.
Material Fatigue: Over time, even properly installed bushings will experience material degradation due to constant stress, thermal cycling, and operational vibrations. This natural wear process necessitates periodic replacement as part of preventive maintenance.
Contamination: The introduction of abrasive particles into the interface between shaft and bushing dramatically accelerates wear. Proper sealing and maintenance of surrounding components help prevent this issue.
Lubrication Issues: While many modern bushings are “self-lubricating,” some applications require proper lubrication for optimal performance and longevity. Inadequate lubrication leads to increased friction and accelerated wear.

When replacing worn bushings, it’s often advisable to “inspect the mating components” – the crankshaft and pulley bore – for wear or damage that might compromise the new bushing‘s performance.

5 Selection and Installation Best Practices

5.1 Choosing the Right Bushing

Selecting the appropriate crankshaft pulley bushing requires careful consideration of several factors:

Dimensional Specifications: Precisely match the bushing‘s internal diameter (to fit the crankshaft) and external diameter (to fit the pulley bore). Standard sizes like the “3/4″ to 7/8” conversion represent common requirements, but precise measurements are essential.
Material Compatibility: Consider the operational environment, including temperature extremes, exposure to chemicals (oil, coolant, etc.), and load requirements. As noted in product specifications, quality bushings feature “resistance to chemical degradation from oil or coolant exposure” and ability to “withstand engine temperatures.”
Load Capacity and Speed Requirements: Evaluate the rotational speeds and torque loads the bushing will encounter. Higher-speed applications often benefit from different materials than high-torque, low-speed applications.
Keyway Configuration: Ensure the bushing‘s keyway matches both the shaft and pulley requirements. The inclusion of a “step key” with certain bushing kits addresses compatibility between different keyway sizes.

5.2 Proper Installation Techniques

Correct installation is crucial for bushing performance and longevity:

Surface Preparation: Ensure both the crankshaft surface and pulley bore are clean, smooth, and free of burrs or debris that might affect fitment.
Proper Fitment: Most bushings require a specific interference fit for optimal performance. The housing bore should be clean and free of sharp edges that might damage the bushing during press-fitting.
Alignment Verification: Carefully align the keyway with the shaft key before installation to prevent damage to the keyway or key during installation.
Even Pressure Application: Use appropriate installation tools that “apply pressure evenly across the bushing face” rather than applying force to one side, which can cause misalignment or damage.
Final Inspection: After installation, verify proper alignment and rotation before installing the pulley and belts. In some cases, a preliminary “dry run” without belts can help identify issues before final assembly.

6 Why Choose MYWAY Bushings for Your Crankshaft Pulley Applications

At MYWAY, we understand the critical role that precision-engineered bushings play in your equipment’s performance and reliability. Our dedication to excellence positions us as the premier choice for crankshaft pulley bushing solutions across diverse industries.

6.1 Engineering Excellence and Material Innovation

MYWAY bushings incorporate advanced polymer composites and metallic alloys specifically formulated to withstand the demanding conditions of crankshaft applications. Our materials undergo rigorous testing to ensure:

Exceptional Wear Resistance: Formulations like our EPB7 series deliver superior wear resistance performance for high-load applications, extending service life and reducing downtime.
Temperature Stability: Specialized compounds maintain dimensional stability and performance characteristics across a wide temperature range, with some formulations rated for operations up to 250°C.
Self-Lubricating Properties: Through sophisticated material engineering, solid lubricants are integrated directly into the polymer matrix structure, creating a continuous lubricating film at the bearing surface during operation. This built-in lubrication system eliminates the need for external grease or oil, making these bushings truly maintenance-free solutions.

6.2 Precision Manufacturing and Custom Solutions

Our state-of-the-art manufacturing facilities employ advanced injection molding technologies and precision machining operations to produce bushings with consistent dimensional accuracy and excellent surface finishes. This commitment to manufacturing excellence ensures:

Tight Tolerance Adherence: Every bushing meets exacting specifications for dimensional accuracy, guaranteeing perfect fit and optimal performance in your specific application.
Custom Engineering Capabilities: We specialize in providing customized bushing solutions engineered to meet your specific operational needs. Whether you require modified dimensions, specialized materials, or unique configurations, our technical team can develop the ideal solution.
Comprehensive Technical Support: Our application engineering team provides expert guidance from concept through production, helping you select or develop the ideal bushing solution for your specific operational parameters.

6.3 The MYWAY Advantage

When you partner with MYWAY, you gain access to more than just components – you acquire a comprehensive solution backed by engineering expertise and commitment to quality. Our products deliver the exceptional wear resistance and maintenance-free operation that modern industries demand, while our responsive customer service ensures you receive the technical support necessary for successful implementation.

Contact MYWAY today to discuss your specific application requirements. Our technical team stands ready to help you select or develop the perfect bushing solution to enhance your equipment’s performance, reduce maintenance costs, and improve operational reliability.

7 Frequently Asked Questions About Crankshaft Pulley Bushings

7.1 What are the primary advantages of using a crankshaft pulley bushing?

Crankshaft pulley bushings offer several significant advantages, including cost savings by adapting existing components rather than requiring replacement of expensive parts, vibration reduction through precise alignment, and wear protection for both the crankshaft and pulley. They provide a practical solution for compatibility issues between different component sizes, significantly extending the service life of power transmission systems.

7.2 How do I know if my crankshaft pulley bushing needs replacement?

Common signs of bushing failure include visible pulley wobble, frequent or premature belt wear, increased vibration or noise from the engine front, and visible wear or scoring on the bushing surface. As described in one user account, “after the second time the cheap belts broke I started watching the crank pulley while the engine was running and noticed it wobbling slightly” – this symptom often indicates bushing wear.

7.3 Can I install a crankshaft pulley bushing myself, or should I seek professional help?

While experienced DIY mechanics can successfully install crankshaft pulley bushings, proper installation requires specialized tools and technical knowledge. Critical steps include ensuring proper alignment, achieving the correct interference fit, and verifying keyway engagement. If you’re unfamiliar with these procedures, seeking professional assistance is recommended to prevent damage to components.

7.4 What materials are best for crankshaft pulley bushings in high-temperature applications?

For high-temperature applications, bronze alloys, specialized steel compositions, and high-temperature polymer composites typically deliver the best performance. MYWAY offers specific formulations engineered for temperature resistance, with some capable of withstanding operations up to 250°C while maintaining their structural integrity and performance characteristics.

7.5 How long should a crankshaft pulley bushing typically last?

Bushing lifespan varies significantly based on operating conditions, load levels, rotational speeds, and environmental factors. Under normal conditions with proper installation, high-quality bushings typically provide extended service life. The “maintenance-free operation” of quality bushings ensures longevity without requiring intermediate lubrication or service.

7.6 Are crankshaft pulley bushings universal, or do I need a specific size?

Bushings are not universal – they must be precisely matched to both the crankshaft diameter and the pulley bore size. Common conversion sizes like “3/4″ to 7/8” are available, but precise measurements are essential for proper fitment and performance. MYWAY offers both standard and custom-sized bushings to meet specific application requirements.

7.7 What is the difference between a bushing and a bearing in this application?

While both serve similar functions of facilitating rotation and reducing friction, bushings (also called sleeve bearings) are generally simpler in design, often handle higher load capacities at lower speeds, and frequently incorporate self-lubricating properties. Bearings typically contain rolling elements (balls or rollers) and are better suited for higher-speed applications. For crankshaft pulley applications where precise alignment and vibration dampening are priorities, bushings often provide superior performance.