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277-6551 ROTATING-GP | REPLACEMENT FOR CATERPILLAR

2776551 277-6551

  • Application: For Caterpillar AP355F
  • Customization: labels and logo
  • Delivery: 7-15 working days
  • Certifications: ISO 9001/ITS
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Rotary Group
Rotary Group
Rotary Group

Material:

Carbon Steel

The Barrel in a piston pump is a cylindrical chamber where the reciprocating piston moves back and forth. It provides a sealed space for fluid or gas displacement. It creates a suction to draw in fluid or gas, compresses it, and then pushes it out through an outlet. The piston's movement creates a cycle of suction, compression, discharge, and return strokes to continuously pump the fluid or gas.

Attributes:
• Made up of Carbon Steel and Alloy Steel.
• Withstands pressure and forces.
• Manufactured with precise dimensions for optimal performance.
• Provides a tight seal to minimize leakage.

Application:
The Barrel in a piston pump creates a sealed chamber for fluid displacement and guides the piston's reciprocating motion.

Material Handlers

MH3022 MH3024

Wheeled Excavators

M320 M323 M318 M319 M316 M317

Compact Wheel Loaders

907H 907H2 906H2 908H2 908H 906H

Excavators

MH3022 MH3024

Track-Type Tractors

D6K2 XL D6K2 D4 D6K2 LGP D6K D6K XL D6K LGP

Vibratory Compactors

CP-64 CS-56 CS-76 CS-74 CP-76 CP-56 CP-74 CS-64

Asphalt Pavers

AP355 AP355F

Product Introduction

PRECISION-ENGINEERED ROTATING GROUP

Designed for reliable hydraulic performance in demanding Caterpillar applications.

  • Precision-Machined Components — Tight dimensional control supports accurate fitment and smooth operation.

  • Wear-Resistant Materials — Selected materials and surface treatments help withstand continuous high-load operation.

  • Balanced Rotating Assembly — Optimized component matching helps minimize vibration and maintain stable pump performance.

  • Reliable Replacement Solution — Engineered as an aftermarket replacement for selected Caterpillar hydraulic piston pumps.

  • 100% Quality Inspected — Critical dimensions, surface condition, assembly, and performance are inspected before shipment.

PRECISION MANUFACTURING & QUALITY CONTROL

Every HYDSTAR rotating group is manufactured using CNC machining processes and controlled to strict dimensional requirements throughout production.

MULTI-STAGE QUALITY CONTROL

01 — Dimensional Inspection
Critical dimensions and tolerances are verified to ensure accurate component fitment.

02 — Surface & Hardness Inspection
Surface condition and hardness are checked to ensure consistent wear resistance.

03 — Assembly Inspection
Component matching, clearance, and assembly condition are inspected before final approval.

04 — Performance Testing
Completed assemblies undergo functional testing to verify stable and reliable operation.

Rotary Group

 

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