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| Parameter | Specification | Testing Standard |
|---|---|---|
| COGENG Part Number | COGENG-707-98-35340-ARM | Internal Quality Standard QS-518 |
| Replaces OEM Part No. | Komatsu 707-98-35340 | Direct OEM Replacement |
| Piston Seal Material | Polyurethane (PU) Grade 94A | ISO 6072 |
| Rod Seal Material | Nitrile (NBR) with PTFE fill | ISO 6072 |
| Wiper Material | Polyurethane double-lipped | ISO 6194 |
| O-Ring Material | Nitrile (NBR) 70 Durometer | ISO 3601-1 |
| Wear Band Material | PTFE-filled composite | ISO 6811 |
| Backup Ring Material | Nylon 6.6 | ISO 1874-1 |
| Temperature Range | -35°C to +100°C (-31°F to +212°F) | ISO 2230 |
| Pressure Rating | Up to 30 MPa (4350 PSI) | ISO 10766-1 |
| Fluid Compatibility | Komatsu Super Hydraulic Fluid, mineral oil, synthetic | ISO 6743-4 |
| Shelf Life | 5 years in original packaging | ISO 2230 |
| Component | Material | Size Specification | Quantity | Function |
|---|---|---|---|---|
| Main Piston Seal | Polyurethane | 80mm ID x 6mm width | 1 | Primary pressure sealing |
| Rod Seal | NBR with PTFE | 55mm ID x 5mm width | 1 | Dynamic rod sealing |
| Buffer Seal | Polyurethane | 80mm ID x 5mm width | 1 | Pressure peak protection |
| Wiper Seal | Polyurethane double-lipped | 55.5mm ID | 1 | Contaminant exclusion |
| Wear Bands | PTFE composite | 80mm OD x 5mm width | 2 | Piston guidance |
| O-Rings | Nitrile (NBR) | Various sizes AS568 | 6 | Static sealing |
| Backup Rings | Nylon 6.6 | Various sizes | 3 | Anti-extrusion support |
| Guide Rings | PTFE-filled fabric | 80mm OD x 5mm width | 2 | Bearing surface protection |
| Gland Gasket | NBR | 60mm OD x 2mm CS | 1 | Gland static seal |
| Manufacturer | Model Series | Specific Models | Year Range | Serial Number Range |
|---|---|---|---|---|
| Komatsu | PC80MR-10 | PC80MR-10 Standard | 2015-2020 | 100001-102500 |
| Komatsu | PC80MR-10 | PC80MR-10 Dash 3 | 2016-2021 | 102501-105000 |
| Komatsu | PC80MR-10 | PC80MR-10 Dash 5 | 2017-2022 | 105001-107500 |
| Related Models | PC78MR-10 | PC78MR-10, PC78MR-11 | 2014-2019 | Verify compatibility first |
| Parameter | Specification | Tolerance | Application |
|---|---|---|---|
| Cylinder Bore | 80 mm | +0.08/-0.00 mm | Arm cylinder |
| Piston Rod Diameter | 55 mm | +0.00/-0.04 mm | Chrome-plated rod |
| Stroke Length | 785 mm | ±3 mm | Arm extension range |
| Rod Finish | Hard chrome plated | Ra 0.2-0.4 μm | Surface roughness |
| Operating Pressure | 27.4 MPa (280 kg/cm²) | ±2% | System design pressure |
| Burst Pressure | 54.8 MPa (560 kg/cm²) | +10% | Safety margin |
| NO | Number | Name | Qty |
| K01 | 707-98-41380 | Seal Kit, Hydraulic Cylinder | |
| 02896-11009 | • O-ring | 2 | |
| 07000-12120 | • O-ring | 1 | |
| 07000-B2115 | • O-ring | 2 | |
| 07145-00065 | • Seal, Dust | 4 | |
| 07156-01215 | • Ring, Wear | 1 | |
| 707-35-11160 | • Ring, Back-up | 3 | |
| 707-44-12150 | • Ring, Piston | 1 | |
| 707-51-60211 | • Packing, Rod | 1 | |
| 707-56-60740 | • Seal, Dust | 1 | |
| K02 | 21W-32-05060 | Service Kit, Shoe Bolt and Nut | |
| 11Y-32-11220 | • Nut | 50 | |
| 22P-32-11210 | • Bolt | 50 | |
| K03 | 21W-32-05050 | Shoe Bolt and Nut Kit | |
| 11Y-32-11220 | • Nut | 50 | |
| 201-32-51240 | • Bolt | 50 | |
| 707-98-36740 | Seal, Kit, Hydraulic Cylinder | ||
| K04 | 02896-11012 | • O-ring | 2 |
| 02896-11015 | • O-ring | 1 | |
| 07000-12115 | • O-ring | 1 | |
| 07000-B2110 | • O-ring | 2 | |
| 07145-00060 | • Seal, Dust | 2 | |
| 07145-00065 | • Seal, Dust | 2 | |
| 707-35-11110 | • Ring, Back-up | 3 | |
| 707-39-11510 | • Ring, Wear | 1 | |
| 707-44-11250 | • Ring, Piston | 1 | |
| 707-51-65211 | • Packing, Rod | 1 | |
| 707-56-65740 | • Seal, Dust | 1 | |
| K05 | 707-98-35340 | Seal Kit, Hydraulic Cylinder | |
| 02896-11012 | • O-ring | 2 | |
| 02896-11015 | • O-ring | 1 | |
| 07000-12100 | • O-ring | 1 | |
| 07000-B2095 | • O-ring | 2 | |
| 07145-00055 | • Seal, Dust | 2 | |
| 07145-00060 | • Seal, Dust | 2 | |
| 07156-01012 | • Ring, Wear | 1 | |
| 707-35-10960 | • Ring, Back-up | 3 | |
| 707-44-10150 | • Ring, Piston | 1 | |
| 707-51-60211 | • Packing, Rod | 1 | |
| 707-56-60740 | • Seal, Dust | 1 | |
| K06 | 707-98-30720 | Seal Kit, Hydraulic Cylinder | |
| 02896-11012 | • O-ring | 4 | |
| 07000-12090 | • O-ring | 1 | |
| 07000-B2085 | • O-ring | 1 | |
| 07145-00050 | • Seal, Dust | 2 | |
| 07156-00912 | • Ring, Wear | 1 | |
| 21W-70-41440 | • Seal, Dust | 2 | |
| 707-35-10860 | • Ring, Back-up | 1 | |
| 707-44-90150 | • Ring, Piston | 1 | |
| 707-51-55211 | • Packing, Rod | 1 | |
| 707-56-55740 | • Seal, Dust | 1 | |
| K07 | 707-98-42720 | Seal Kit, Hydraulic Cylinder | |
| 02896-11009 | • O-ring | 1 | |
| 02896-11012 | • O-ring | 1 | |
| 07000-12130 | • O-ring | 1 | |
| 07000-B2125 | • O-ring | 1 | |
| 07145-00070 | • Seal, Dust | 4 | |
| 07156-01315 | • Ring, Wear | 1 | |
| 707-35-11260 | • Ring, Back-up | 1 | |
| 707-44-13150 | • Ring, Piston | 1 | |
| 707-51-65211 | • Packing, Rod | 1 | |
| 707-56-65740 | • Seal, Dust | 1 | |
| K08 | 707-98-51140 | Service Kit, Hydraulic Cylinder | |
| 02896-11009 | • O-ring | 1 | |
| 02896-11012 | • O-ring | 1 | |
| 07000-12135 | • O-ring | 1 | |
| 07000-12140 | • O-ring | 1 | |
| 07145-00070 | • Seal, Dust | 4 | |
| 07146-02136 | • Ring, Back-up | 1 | |
| 07156-01417 | • Ring, Wear | 1 | |
| 707-44-14180 | • Ring, Piston | 1 | |
| 707-51-65211 | • Packing, Rod | 1 | |
| 707-56-65740 | • Seal, Dust | 1 | |
| K09 | 707-98-24800 | Service Kit, Hydraulic Cylinder | |
| 02896-11009 | • O-ring | 3 | |
| 07000-12085 | • O-ring | 1 | |
| 07000-12090 | • O-ring | 1 | |
| 07145-00050 | • Seal, Dust | 4 | |
| 07146-02086 | • Ring, Back-up | 1 | |
| 07156-00912 | • Ring, Wear | 1 | |
| 707-44-90070 | • Ring, Piston | 1 | |
| 707-51-45210 | • Packing, Rod | 1 | |
| 707-56-45740 | • Seal, Dust | 1 |
| Performance Parameter | Value | Test Method |
|---|---|---|
| Seal Life Expectancy | 3,500 operating hours | ISO 7983 |
| Friction Coefficient | 0.08-0.12 | ASTM D1894 |
| Extrusion Resistance | 32 MPa sustained | ISO 1829 |
| Compression Set | <14% after 24h @ 100°C | ISO 815 |
| Abrasion Resistance | >50,000 cycles | ISO 4649 |
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...
