Komatsu PC400 Pins & Bushings
Komatsu PC400 pins and bushings are critical wear components used throughout the excavator’s work equipment, including the bucket linkage, arm, and boom connection points. These parts allow controlled movement between heavy structural components while absorbing the stress created during digging, lifting, and material handling operations.
Because these joints are constantly moving under load, pins and bushings are among the most common wear parts on Komatsu PC400 excavators. This page is designed to help you understand where these components are used, how they wear, and how to identify the correct replacement parts for your machine.
Where Pins & Bushings Are Used on Komatsu PC400 Excavators
Pins and bushings are installed at the main articulation points of the PC400 work equipment. The most common wear areas include:
- Bucket linkage – exposed to constant digging forces and heavy articulation
- Arm-to-bucket connection – subject to repeated movement and load transfer
- Boom-to-arm connection – carries major structural loads during operation
- Boom base connection – supports the primary movement of the front attachment
These connection points are essential to excavator performance and should be monitored regularly for wear, looseness, and fitment issues.
Common Signs of Pin & Bushing Wear
As pins and bushings wear, clearance increases between the connected components. Excessive wear can reduce machine precision and place added stress on nearby parts.
- Loose bucket or arm movement
- Knocking, clunking, or rattling sounds during operation
- Uneven wear at linkage points
- Reduced digging accuracy and control
- Accelerated wear on surrounding components
Replacing worn pins and bushings before severe damage develops helps reduce downtime and prevents more expensive repairs later.
Komatsu PC400 Pin & Bushing Sections
To simplify identification, PC400 pins and bushings can be grouped into the main work equipment sections below.
Bucket Linkage Pins & Bushings
This group includes pins and bushings used in the bucket, H-link, linkage assemblies, and other high-wear connection points directly involved in digging.
Arm Pins & Bushings
Arm connection points transfer force between the bucket and boom and are constantly exposed to movement, shock, and heavy load cycles.
Boom Pins & Bushings
Boom pin and bushing locations support the primary work equipment load. Proper fitment in these areas is important for structural alignment and long-term machine performance.
Why Serial Number Matters
Komatsu PC400 excavators are available in multiple variations such as PC400-3, PC400-5, PC400-6, PC400-7, and PC400-8. While these machines share a general layout, pin and bushing dimensions, configurations, and part numbers may vary depending on the model and serial number range.
Matching the correct replacement part to your exact machine helps prevent installation issues and supports longer service life.
Aftermarket vs OEM Pins & Bushings
High-quality aftermarket pins and bushings can provide a dependable and cost-effective alternative to OEM components when manufactured to the proper specifications. Quality materials, correct tolerances, and consistent hardness are essential for long service life in heavy-duty applications.
19PARTS supplies reliable aftermarket solutions for Komatsu excavators, helping customers reduce downtime and maintain performance without overspending on wear components.
How to Select the Correct PC400 Pin or Bushing
- Identify your exact model, such as PC400-6 or PC400-8
- Confirm the serial number range
- Determine the wear area or section, such as bucket, arm, or boom
- Match the correct part number using parts diagrams or cross-reference information
If you are unsure which pin or bushing fits your machine, using a parts diagram or getting help with part identification can save time and prevent ordering errors.
Need Help Finding Komatsu PC400 Pins & Bushings?
If you need assistance identifying the correct Komatsu PC400 pin or bushing, our team can help with part lookup, cross-referencing, and fitment support.
Contact us today for help sourcing Komatsu PC400 pins and bushings.
Komatsu PC400 pins and bushings are critical wear components used throughout the excavator’s work equipment, including the bucket linkage, arm, and boom connection points. These parts allow controlled movement between heavy structural components while absorbing the stress created during digging, lifting, and material handling operations.
Because these joints are constantly moving under load, pins and bushings are among the most common wear parts on Komatsu PC400 excavators. This page is designed to help you understand where these components are used, how they wear, and how to identify the correct replacement parts for your machine.
Where Pins & Bushings Are Used on Komatsu PC400 Excavators
Pins and bushings are installed at the main articulation points of the PC400 work equipment. The most common wear areas include:
- Bucket linkage – exposed to constant digging forces and heavy articulation
- Arm-to-bucket connection – subject to repeated movement and load transfer
- Boom-to-arm connection – carries major structural loads during operation
- Boom base connection – supports the primary movement of the front attachment
These connection points are essential to excavator performance and should be monitored regularly for wear, looseness, and fitment issues.
Common Signs of Pin & Bushing Wear
As pins and bushings wear, clearance increases between the connected components. Excessive wear can reduce machine precision and place added stress on nearby parts.
- Loose bucket or arm movement
- Knocking, clunking, or rattling sounds during operation
- Uneven wear at linkage points
- Reduced digging accuracy and control
- Accelerated wear on surrounding components
Replacing worn pins and bushings before severe damage develops helps reduce downtime and prevents more expensive repairs later.
Komatsu PC400 Pin & Bushing Sections
To simplify identification, PC400 pins and bushings can be grouped into the main work equipment sections below.
Bucket Linkage Pins & Bushings
This group includes pins and bushings used in the bucket, H-link, linkage assemblies, and other high-wear connection points directly involved in digging.
Arm Pins & Bushings
Arm connection points transfer force between the bucket and boom and are constantly exposed to movement, shock, and heavy load cycles.
Boom Pins & Bushings
Boom pin and bushing locations support the primary work equipment load. Proper fitment in these areas is important for structural alignment and long-term machine performance.
Why Serial Number Matters
Komatsu PC400 excavators are available in multiple variations such as PC400-3, PC400-5, PC400-6, PC400-7, and PC400-8. While these machines share a general layout, pin and bushing dimensions, configurations, and part numbers may vary depending on the model and serial number range.
Matching the correct replacement part to your exact machine helps prevent installation issues and supports longer service life.
Aftermarket vs OEM Pins & Bushings
High-quality aftermarket pins and bushings can provide a dependable and cost-effective alternative to OEM components when manufactured to the proper specifications. Quality materials, correct tolerances, and consistent hardness are essential for long service life in heavy-duty applications.
19PARTS supplies reliable aftermarket solutions for Komatsu excavators, helping customers reduce downtime and maintain performance without overspending on wear components.
How to Select the Correct PC400 Pin or Bushing
- Identify your exact model, such as PC400-6 or PC400-8
- Confirm the serial number range
- Determine the wear area or section, such as bucket, arm, or boom
- Match the correct part number using parts diagrams or cross-reference information
If you are unsure which pin or bushing fits your machine, using a parts diagram or getting help with part identification can save time and prevent ordering errors.
Need Help Finding Komatsu PC400 Pins & Bushings?
If you need assistance identifying the correct Komatsu PC400 pin or bushing, our team can help with part lookup, cross-referencing, and fitment support.
Contact us today for help sourcing Komatsu PC400 pins and bushings.