COGENG 707-99-22010 Komatsu Premium Hydraulic Cylinder Seal Kit

Technical Constants & Performance Data

Component Specifications Table

Compatible Machine Models

Parts list




Installation decomposition diagram

Pre-Installation Requirements

1. Workspace Preparation: Maintain ISO 4406 Class 8/7/5 cleanliness in assembly area

2. Tool Requirements: Use only non-metallic installation tools (plastic/brass)

3. Temperature Control: Store and install at 15-25°C (59-77°F) for optimal seal performance

4. Surface Finish Verification:

   • Cylinder bore: Ra ≤ 0.4 µm, Rz ≤ 3.2 µm

   • Piston rod: Ra ≤ 0.2 µm, Rz ≤ 1.6 µm

   • Hardness: ≥ 58 HRC for chrome-plated surfaces

Step-by-Step Installation

1. Component Inspection: Verify all parts against packing list CG-PL-22010

2. Surface Preparation:

   • Clean with solvent meeting ISO 11158:1997

   • Remove all burrs with 400-grit abrasive

   • Apply temporary corrosion inhibitor

3. Seal Installation Sequence:

   • Install wear bands first (heat to 80°C/176°F if necessary)

   • Install primary piston seals with COGENG installation cone P/N CG-IC-22010

   • Install rod seals with protective sleeve P/N CG-PS-22010

   • Torque gland nuts to 450-500 N·m (332-369 ft-lbs) in crisscross pattern

4. Post-Installation Procedures:

   • Pressure test at 5 MPa increments to 35 MPa

   • Cycle cylinder 10 times at 50% stroke

   • Final leak check at operating temperature (50-60°C)

Critical Warnings

⚠️ DO NOT use petroleum-based lubricants during installation
⚠️ DO NOT exceed 130°C operating temperature continuously
⚠️ REQUIRED: Install within 24 hours of opening vacuum-sealed packaging
⚠️ MANDATORY: Replace all bolts with new high-tensile fasteners (ISO 898-1 Class 10.9)

Frequently Asked Questions

A. When will get the items after I place order?
Q. Once your payment is confirmed,we will arrange the goods within 1~4 days; if not in stock, we will inform you before placing the order?

A. If I only know the excavator model, but can not offer parts No.,what should I do ?
Q. If possible, you can send us pictures of old products, nameplate or the size for reference.

A. How can you guarantee the quality??
Q. We will 100% test the goods before delivery. We also support video inspection.

A. How long will it take to delivery to my address??
Q. The normal delivery time is 3-7 days, depending on which country you are in.?

A : Which delivery method will you choose?
Q : By sea, air or express(DHL,Fedex,TNT, UPS, EMS etc.)，Sometimes we will arrange as the customer's demand.

A: What's package? Can you give me the package according my requirement??
Q. We usually packed by standard exported box or carton. And yes we can pack as per your requirement.

A: Can the price be cheaper?
Q: Of course, you will be offered a good discount for a big amount.

A: Why should I choose to buy from you?
Q:Our advantages: 100% quality assurance, develop and manufature follow original ones;Quick response within 24 hours; Small order allowed;Reasonable stock and timely delivery;Neutral packing, customized packing are allowed. Positive customer feedback from abroad market;Excellent after-sales service.
A : Which payment terms can you accept?
Q : Paypal. Western Union, Bank Transfer, T/T...