Arm Cylinder Seal Kit for Doosan 255 Excavator Repair

This 440-00044AKT arm cylinder seal kit is used for Doosan 255 excavator arm cylinder repair. It is designed to help restore hydraulic sealing performance when the arm cylinder has oil leakage, weak digging force, slow arm movement, pressure loss, or unstable cylinder holding performance.

The arm cylinder is an important working cylinder in the excavator hydraulic system. It works frequently during digging, pulling, loading, trenching, leveling, and heavy earthmoving jobs. When the internal seals become worn, aged, hardened, cracked, or damaged, hydraulic oil may leak from the cylinder rod area, and the excavator may lose stable arm pulling power. Replacing the old seals with the correct arm cylinder repair kit is a practical way to rebuild the hydraulic cylinder without replacing the complete cylinder assembly.

Product Parameters

Main Selling Points

Accurate Match for Doosan 255 Arm Cylinder
This seal kit is matched with part number 440-00044AKT and used for the Doosan 255 arm cylinder. Buyers can confirm the product by part number, machine model, and cylinder position, helping reduce wrong orders and repeated checking before purchase.

Helps Restore Digging and Pulling Performance
A damaged arm cylinder seal may cause hydraulic oil leakage, weak arm movement, cylinder drifting, pressure drop, and slow response. This hydraulic cylinder seal kit helps rebuild the sealing system and improve excavator working performance after maintenance.

Practical Excavator Cylinder Repair Solution
Using the correct excavator cylinder repair kit can reduce maintenance cost and shorten machine downtime compared with replacing the complete arm cylinder. It is suitable for excavator owners, hydraulic repair workshops, fleet maintenance teams, and spare parts resellers.

Convenient for Stock and Mixed Orders
The kit is supplied as one complete set, easy to identify, store, and ship. It can be ordered together with boom cylinder seal kits, bucket cylinder seal kits, main pump seal kits, control valve seals, rod seals, piston seals, dust seals, wear rings, and O-ring kits.

Application

This arm cylinder seal kit 440-00044AKT is suitable for Doosan 255 excavator arm cylinder maintenance. It is commonly used when the machine shows hydraulic oil leakage around the arm cylinder rod, weak digging force, slow arm action, unstable cylinder holding, or reduced hydraulic response.

For customers purchasing multiple repair parts, we can help match related excavator seal kits and hydraulic parts according to machine model, part number, cylinder photos, or old seal kit sample details.

Buyer Reminder

Please confirm the part number 440-00044AKT, machine model Doosan 255, and cylinder position before ordering. If you are not sure whether this seal kit fits your excavator, send us the machine model, part number, cylinder photos, or old seal kit sample details. We can help check the correct item before shipment.

Equipment names and part numbers are used for reference and identification only.

Primary Keywords: arm cylinder seal kit, hydraulic cylinder seal kit, excavator seal kit, cylinder repair kit
Long-tail Keywords: 440-00044AKT arm cylinder seal kit, Doosan 255 arm cylinder seal kit, YNF18318 seal kit, excavator arm cylinder repair kit, hydraulic arm cylinder seals, Doosan excavator seal kit