Komatsu WA400 Service Kits

Komatsu WA400 Service Kits is a supported WQC Parts hub because it already connects buyers to real product paths. Use this page to narrow from the broad Komatsu model or system into listed products, serial-aware collections, or specific component groups.

For the best result, start with the exact model and serial number, then choose the closest series, workgroup, product group, or part number shown below. Do not rely on description alone when a serial break, attachment arrangement, arm length, bucket linkage, or hydraulic configuration may change the correct part.

Use the Listed Product Links Below

The product links below are intended for buyers who already know the part number or can confirm the application. If fitment is uncertain, contact WQC Parts before ordering.

Before Ordering: Confirm the Machine and Serial Range

WA400 Service Kits parts can change by series, serial number break, regional arrangement, attachment package, and installed component group. Use this hub to narrow the path, but confirm the final part number against the machine serial number, parts book reference, or existing part stamping before ordering.

  • Best information to provide: machine model, serial number, current part number, component location, and a photo if available.
  • For pins, bushings, service kits, pumps, hydraulic parts, and engine components, similar descriptions may still represent different parts.
  • When you are unsure, use the quote path instead of guessing from a broad description.

Need help confirming a Komatsu part? Contact WQC Parts

Komatsu WA400 Service Kits are a focused subset of Komatsu parts used in hydraulic and mechanical repair work on Komatsu wheel loaders. This machine-family hub helps customers research part numbers, identify stocked service kits, and request additional Komatsu service kits when needed.

Common WA400 Model Variants

  • WA400-1
  • WA400-3-H
  • WA400-3-X
  • WA400-3A
  • WA400-3A-
  • WA400-3A-S
  • WA400-5
  • WA400-5L

Common Service Kit Applications

  • Service Kit,Treadle Valve¤ Spring
  • Service Kit,Treadle Valve
  • Service Kit,Governor
  • Service Kit,Check Valve (For 281-34-11511)
  • Service Kit,Check Valve (For 281-34-12300)
  • Service Kit,Check Valve (For 421-35-14350)
  • Service Kit,Final Drive
  • Service Kit,Wheel Brake
  • Service Kit,Transmission Valve
  • Service Kit,Air Dryer
  • Service Kit,Torqflow Transmission
  • Service Kit,Transmission

Service Kits We Stock

Additional Komatsu Service Kit Part Numbers Available by Request

  • 281-34-05211
  • 421-33-05012
  • 423-15-05130
  • 423-15-05131
  • 423-15-05133
  • 423-15-05134
  • 423-15-05135
  • 423-15-05136
  • 423-35-15110
  • 424-15-05110
  • 424-15-05111
  • 424-15-05113
  • 424-15-05114
  • 424-15-05115
  • 424-15-05116
  • 424-15-05120
  • 424-22-05010
  • 424-35-05120
  • 707-99-25110
  • 707-99-73020
  • 421-35-16360
  • 714-07-05012
  • 714-07-05050
  • 714-07-05101
  • 714-07-05064
  • 714-07-05060
  • 425-64-21130
  • 714-15-05040
  • 714-15-05041
  • 714-15-05042
  • 714-15-05050
  • 714-15-05051
  • 714-15-05052
  • 714-15-05140
  • 6742-02-1110
  • 714-12-05020
  • 714-12-05070

Return to Komatsu Wheel Loader Service Kits or the Komatsu Service Kits master hub.