COGENG 707-99-50650 Premium Bucket Cylinder Seal Kit for Komatsu PC400-7E Excavators

Component Specifications Table

Compatible Excavator Models

Bucket Cylinder Specifications

Decompose pictures

Parts list

Installation decomposition diagram
Safety Protocol
Completely depressurize hydraulic system
Secure excavator on stable ground with proper supports
Support cylinder properly during disassembly
Wear appropriate PPE including gloves and eye protection
Workspace Preparation
Establish clean, organized work area (ISO 4406 Class 8 or better)
Use lint-free cleaning materials
Verify all kit components are present
Prepare proper seal installation tools

Installation Procedure:
Disassembly & Inspection
Mark components for reassembly alignment
Carefully document seal orientation with photos
Inspect cylinder bore and rod for scratches or damage
Clean all components with recommended solvent
Seal Installation Best Practices
Lubricate all seals with clean hydraulic fluid before installation
Use seal installation cones and tools - avoid sharp instruments
Ensure proper directional orientation of lip seals
Verify complete seating in grooves without twisting
Reassembly Specifications
Gland nut torque: 680-720 Nm (502-531 ft-lbs)
Ensure proper component alignment before final tightening
Check for free movement before system pressurization

Commissioning Procedure:
Initial System Start-up
Cycle cylinder slowly without load 5-10 times
Check for external leaks at all connections
Monitor system pressure gradually
Verify smooth cylinder operation
Performance Validation
Check for hydraulic drift under load
Verify cylinder speed and power match specifications
Monitor fluid temperature and clarity
Conduct operational testing under working conditions

Performance & Durability Data

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...