| Parameter | Value / Specification |
|---|---|
| Maximum Operating Pressure | Up to 5,000 PSI (345 bar) |
| Temperature Range | -40°F to 225°F (-40°C to 107°C) |
| Fluid Compatibility | Mineral-based hydraulic oils, Komatsu Super Hydraulic Fluid (KSHV), synthetic HFDU fluids |
| Primary Seal Material | Polyurethane (AU), Cast Polyurethane (CU), Nitrile Rubber (NBR) |
| Seal Hardness (Dynamic) | 90-94 Shore A (Polyurethane) |
| Seal Hardness (Static) | 70 Shore A (NBR O-Rings) |
| Design Standard | Manufactured to meet or exceed Komatsu's original specifications |
| Komatsu Excavator Model | OEM Part Number | Cylinder Application |
|---|---|---|
| Komatsu PC160LC-7 | 707-99-37150 | Bucket Cylinder |
| Komatsu PC160LC-7K | 707-99-37150 | Bucket Cylinder |
| Komatsu PC160LC-7K-KA | 707-99-37150 | Bucket Cylinder |
| Komatsu PC180LC-7K | 707-99-37150 | Bucket Cylinder |
| Komatsu PC180NLC-7K | 707-99-37150 | Bucket Cylinder |
Note: This kit is a direct replacement for Komatsu OEM part number 707-99-37150. It is designed specifically for the BUCKET CYLINDER on the PC160LC-7 and compatible models. Verify your machine's model and serial number before installation
Component Specifications Table
| Component Name | Material | Color | Durometer | Function |
|---|---|---|---|---|
| Main Piston Seal | Polyurethane (AU) | Brown | 94 Shore A | Maintains pressure between cylinder chambers |
| Rod Seal | Cast Polyurethane (CU) | Black | 93 Shore A | Prevents hydraulic oil from leaking out of the cylinder |
| Wiper/Scraper | Polyurethane (PU) | Black | 90 Shore A | Blocks contaminants from entering the cylinder |
| Buffer Seal | Polyurethane (CU) | Black | 90 Shore A | Absorbs pressure spikes and extends rod seal life |
| Wear Ring / Guide Band | Glass-Filled PTFE | Dark Brown | N/A | Keeps moving parts aligned, prevents metal-to-metal contact |
| Dust Seal | Polyurethane | Black | 85 Shore A | Secondary contaminant exclusion |
| O-Ring Set | Nitrile Rubber (NBR) | Black | 70 Shore A | Static sealing for gland, end cap, and ports |
| Backup Rings | Nylon 6.6 | Tan | N/A | Prevents extrusion of static O-rings under pressure |
Application Verification: Confirm 707-99-37150 is the correct part number for your PC160LC-7 bucket cylinder using official Komatsu documentation.
System Depressurization: Park the excavator on level ground. Lower the boom and bucket fully to relieve all hydraulic pressure. For fuel system work, wait at least 30 seconds after engine stop before servicing
Clean Work Environment: Maintain meticulous cleanliness throughout the repair process. Excavator cylinders operate in harsh conditions; contamination control is essential
Documented Disassembly: Carefully disassemble the bucket cylinder. Photograph and note the exact order and orientation of all components, especially the seal stack in the gland.
Critical Metal Inspection: Inspect the cylinder rod for scratches, gouges, or corrosion. Check the cylinder bore (ID) for scoring, pitting, or excessive wear. Damaged metal components MUST be reconditioned or replaced prior to seal installation.
Lubricated Assembly: Soak all new elastomeric seals in clean hydraulic fluid. Lightly lubricate all seal grooves and sliding surfaces before installing new seals.
Proper Tool Use: Use seal installation tools (cone tools, picks, sleeves) to carefully install seals without cutting, stretching, or rolling them over sharp edges.
Torque to Specification: During reassembly, use a calibrated torque wrench. Adhere strictly to Komatsu's specified torque values and sequences for gland bolts or end caps.
System Testing: After assembly, perform a controlled pressure test to validate seal integrity before returning the machine to service.
Critical Specific WarningsMODEL-SPECIFIC APPLICATION: This kit is ONLY for the BUCKET CYLINDER on the Komatsu PC160LC-7 and compatible models (PC160LC-7K, PC160LC-7K-KA, PC180LC-7K, PC180NLC-7K). Do not use on boom cylinders, arm cylinders, or other models without verification
METAL SURFACE CONDITION: This kit seals fluid between precision metal surfaces. It CANNOT repair a scored rod or a worn cylinder bore. Installation on damaged components will result in immediate, severe leakage.
CONTAMINATION CONTROL: Even microscopic debris introduced during assembly will act as an abrasive, destroying new seals. Maintain absolute cleanliness during installation
BUCKET SUPPORT HAZARD: The excavator bucket must be fully lowered and supported. Never work on a cylinder that is under load or hydraulic pressure.
Compatibility & Application Data
| Application Sector | Target Equipment | Cylinder Type | Symptoms Addressed |
|---|---|---|---|
| Heavy Excavation & Earthmoving | Komatsu PC160LC-7 | Bucket Cylinder | Weak bucket curling force, poor breakout power, visible hydraulic leaks from rod gland, oil spots under the machine |
| Mining & Quarry Operations | -7 Series Excavator | Bucket Curling Control | Loss of digging efficiency, reduced machine productivity, increased hydraulic fluid consumption |
| Construction & Demolition | Medium Excavator Bucket Cylinder | Hydraulic Implement Repair | Unplanned downtime, fluid contamination from failed seals, reduced cycle times |
| Equipment Maintenance | Scheduled Overhauls & Leak Repair | Bucket Cylinder Rebuild | Restores factory sealing, cost-effective OEM alternative, extends cylinder service life |
Manufacturing Quality:
Each COGENG seal kit is produced under a standardized process including precision material weighing, high-pressure compression molding, and rigorous quality inspection to ensure dimensional accuracy, surface smoothness, hardness, and sealing resilience
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...
Contact COGENG
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