Technical Constants & Performance Data
| Parameter | Value / Specification |
|---|---|
| Maximum Operating Pressure | Up to 4,350 PSI (300 bar) |
| Temperature Range | -40°F to 225°F (-40°C to 107°C) |
| Fluid Compatibility | Mineral-based hydraulic oils, Komatsu Super Hydraulic Fluid (KSHV), BIO HFDU fluids |
| Primary Seal Material | Polyurethane (AU), Nitrile Rubber (NBR), PTFE, FKM (select applications) |
| Seal Hardness (Dynamic) | 88-94 Shore A (as specified per component) |
| Seal Hardness (Static) | 70 Shore A (NBR O-Rings) |
| Quality Standard | Manufactured to meet or exceed NOK Corporation specifications and Komatsu OEM requirements |
Exact Model Compatibility
| Komatsu Equipment Model | OEM Part Number | Quality Reference |
|---|---|---|
| Komatsu D61-12 Crawler Dozer | 707-99-35160 | NOK-Grade Equivalent |
| Note: | This kit is a direct replacement for Komatsu OEM part number 707-99-35160. It is designed specifically for the D61-12 dozer model. The kit may serve multiple cylinder applications including blade lift, tilt, pitch, and ripper cylinders depending on the machine configuration. Always verify the specific cylinder application using the machine's service manual. |
Component Specifications Table
| Component Name | Material Specification | Quality Grade | Primary Function |
|---|---|---|---|
| Piston Seals | Premium Polyurethane (AU) | NOK-Grade Equivalent | Dynamic pressure sealing |
| Rod Seals | Cast Polyurethane (CU) / PTFE | NOK-Grade Equivalent | Primary rod sealing |
| Wipers/Scrapers | Heavy-Duty Polyurethane | NOK-Grade Equivalent | Contaminant exclusion |
| Wear Rings / Guide Bands | Glass-Filled PTFE / Nylon | NOK-Grade Equivalent | Piston/rod guidance |
| O-Ring Sets | Nitrile Rubber (NBR) / FKM | JIS B2401 / AS568 | Static sealing |
| Backup Rings | Engineering-Grade Nylon | NOK-Grade Equivalent | Anti-extrusion protection |
| Gaskets | Compressed Fiber / Rubber | OEM Specification | Flange and cover sealing |
| Dust Seals | Polyurethane / Nitrile | NOK-Grade Equivalent | Secondary contamination control |
Specific Components Included
Complete set of piston seals for applicable cylinders
Rod seal sets for all serviced cylinders
Heavy-duty wipers and scrapers
Wear rings and guide bands
Comprehensive O-ring assortment (JIS metric sizes)
Backup rings for high-pressure applications
Gaskets for hydraulic component covers
Note: This is a multi-application service kit containing seals for various cylinders and components on the D61-12. Contents are organized to match the OEM kit configuration. A detailed packing list is included.
Support Seals & Hardware
Full complement of seals for complete dozer hydraulic system maintenance
All static and dynamic seals as specified in OEM bill of materials
JIS metric O-ring sizes matching Japanese industrial standards
Excluded Items: This kit contains seal and gasket components only. Pistons, rods, barrels, bearings, bolts, pins, and other metal parts are not included.
Installation decomposition diagram
Installation Guidelines & Critical Procedures
Application Verification: Confirm 707-99-35160 is the correct kit for your specific D61-12 configuration and cylinder type.
System Depressurization: Completely relieve all hydraulic pressure. Lower all implements fully to ground.
Clean Work Environment: Maintain surgical cleanliness throughout the repair process. Dozer environments are highly abrasive.
Component Identification: Use the included packing list and machine service manual to identify correct seals for each location.
Metal Inspection: Thoroughly inspect all cylinder rods, bores, and mating surfaces for wear, scoring, or damage.
Proper Installation: Use appropriate tools and techniques. Lubricate all seals with clean hydraulic fluid before installation.
Torque Compliance: Follow Komatsu D61-12 service manual torque specifications for all fasteners.
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...
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