Technical Tips

How to Match Hydraulic Flow and Pressure for Excavator Attachments

Hydraulic flow controls speed and cycling, while pressure affects force. Matching both helps attachments work efficiently and protects hydraulic components.

Hydraulic flow and pressure matching for excavator attachments
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Quick Answer

Before buying a hydraulic attachment, confirm auxiliary oil flow, operating pressure, line size and return line requirements. Incorrect hydraulic matching can cause weak performance or overheating.

Hydraulic Matching Factors

Oil flow

Controls cycle speed, impact rate or rotation speed.

Operating pressure

Affects force, cutting power and compaction output.

Return line

Some tools require low back pressure return lines.

Hose size

Incorrect hose size can restrict flow and create heat.

Attachment type

Breaker, shear, auger and compactor require different ranges.

Carrier condition

Older machines may need hydraulic system inspection.

Why Oil flow Matters

Controls cycle speed, impact rate or rotation speed. This point should be confirmed before production so the attachment can be matched to the real carrier and jobsite.

How to Check Operating pressure

Affects force, cutting power and compaction output. Clear photos, machine information and simple notes make the matching process faster for overseas buyers.

Final Check Before Ordering

Confirm excavator model, operating weight, attachment configuration, hydraulic requirement, dimensions if available, quantity and destination before placing the order.

Hydraulic Data Checklist

ItemWhat to CheckWhy It Matters
Oil flowControls cycle speed, impact rate or rotation speed.Core selection data
Operating pressureAffects force, cutting power and compaction output.Fitment confirmation
Return lineSome tools require low back pressure return lines.Performance matching
Hose sizeIncorrect hose size can restrict flow and create heat.Jobsite suitability

Common Mistakes

  • Choosing by price or product name without checking excavator data.
  • Not sending photos, dimensions or hydraulic information when they are needed.
  • Ignoring jobsite material, working condition and duty cycle.
  • Forgetting spare parts, bracket matching and shipping details.

What Information to Send for Quote

  • Excavator brand and model
  • Operating weight
  • Attachment type
  • Working condition
  • Photos or drawings
  • Quantity and destination
Hydraulic breaker matched by oil flow and operating pressure
Hydraulic Breaker

Hydraulic Breaker support for KRATOR model-matched excavator attachment projects.

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Hydraulic shear matched by carrier flow and pressure
Hydraulic Shear

Hydraulic Shear support for KRATOR model-matched excavator attachment projects.

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Hydraulic compactor for trench and foundation compaction
Hydraulic Compactor

Hydraulic Compactor support for KRATOR model-matched excavator attachment projects.

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MATCHING SUPPORT

Need a Matching Recommendation?

Send your excavator model, tonnage, hydraulic flow and working condition. KRATOR will recommend a suitable attachment configuration for your jobsite or dealership order.

Get Attachment Advice Send Machine Info