Arm Hydraulic Cylinder Seal Kit 707-99-72300 for Komatsu PC290 PC300 PC350 Excavator
Arm Hydraulic Cylinder Seal Kit 707-99-72300 for Komatsu PC290 PC300 PC350 Excavator
Available in stock
Product Description
Part Name: Arm Hydraulic Cylinder Seal Kit
Part Number(s): 707-99-72300
Brand Compatibility: Komatsu
Machine Type: Excavator
Component: Arm Hydraulic Cylinder
Condition: Brand New
Shipping: Fast worldwide shipping with secure packaging and reliable international delivery within 2–7 business days.
The 707-99-72300 Arm Hydraulic Cylinder Seal Kit is manufactured to OEM specifications for the arm hydraulic cylinder fitted to selected Komatsu PC290, PC300, PC300LC, PC350-7 and PC350-8 excavators. This complete hydraulic cylinder overhaul kit includes precision-engineered rod seals, piston seals, wear rings, guide rings, backup rings, O-rings and dust seals designed to restore hydraulic sealing performance, eliminate hydraulic oil leakage and maintain optimum cylinder pressure. Manufactured from premium sealing materials, it provides dependable performance in demanding construction, mining, quarrying and heavy earthmoving operations.
The arm hydraulic cylinder controls the movement of the excavator arm (stick), providing the reach, digging force and precise attachment positioning required for trenching, excavation, grading and material handling. Continuous operation under high hydraulic pressures, repetitive digging cycles and harsh site conditions gradually wears the cylinder sealing components. Worn seals can result in hydraulic oil leakage, arm drift, reduced digging force, sluggish arm movement and internal hydraulic pressure bypass. Replacing the complete seal kit restores hydraulic efficiency, protects internal cylinder components and helps extend cylinder service life while reducing costly downtime.
Typical Applications
Construction • Earthmoving • Mining • Quarrying • Heavy Excavation • Civil Infrastructure • Road Construction • Demolition • Material Handling
Common Symptoms
- Hydraulic oil leakage from the arm cylinder
- Arm drifting during operation
- Reduced digging force
- Slow arm extension or retraction
- Internal hydraulic pressure bypass
- Difficulty maintaining arm position
- Reduced hydraulic system efficiency
Cross-Reference Part Numbers
OEM Part Number: 707-99-72300
Compatible Models
Excavators: Komatsu PC290, PC300, PC300LC, PC350-7, PC350-8.
Fitment Note
Please verify the OEM part number, machine model, serial number and arm hydraulic cylinder assembly before ordering. Komatsu may use different arm cylinder configurations depending on the machine model, production year and serial number. Contact Imara Engineering Supplies if you require assistance confirming compatibility.
Technical Specifications
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Does IMARA Engineering Supplies offer international shipping?
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