| Parameter | Specification |
|---|---|
| COGENG Part Number | 827020113 |
| Equipment Model | Komatsu WB140-2 Backhoe Loader |
| Application | Dipper Cylinder & Bucket Cylinder |
| Product Type | Hydraulic Cylinder Seal Service Kit |
| OEM Equivalent | Komatsu 827020113 |
| Kit Type | Complete overhaul kit |
| Parameter | Left Stabilizer | Right Stabilizer | Safety Standard |
|---|---|---|---|
| Operating Pressure | 5-20 MPa (725-2,901 PSI) | 5-20 MPa (725-2,901 PSI) | ISO 10766 |
| Locking Pressure | 15 MPa continuous holding | 15 MPa continuous holding | ISO 10766 modified |
| Bore Diameter | 80mm (±0.020mm) | 80mm (±0.020mm) | ISO 286-2 |
| Rod Diameter | 50mm (-0/+0.012mm) | 50mm (-0/+0.012mm) | ISO 286-2 |
| Extended Length | 650mm (fully extended) | 650mm (fully extended) | Komatsu specification |
| Temperature Range | -30°C to +100°C (-22°F to +212°F) | -30°C to +100°C (-22°F to +212°F) | ASTM D2000 |
| Drift Rate Requirement | ≤1 mm/hour at 15 MPa | ≤1 mm/hour at 15 MPa | ISO 10766 modified |
| Seal Material Hardness | 88-94 Shore A | 88-94 Shore A | ASTM D2240 |
| Pressure Holding | 24 hours at 15 MPa with ≤5mm drift | 24 hours at 15 MPa with ≤5mm drift | Safety validation test |
| Load Capacity | 15,000 N per stabilizer | 15,000 N per stabilizer | SAE J1516 |
| Safety Factor | 2.5:1 minimum | 2.5:1 minimum | Industry safety standard |
| Service Life | 4,000-6,000 hours | 4,000-6,000 hours | Field validation data |
| Component | COGENG Part Number | Material | Dimensions | Safety Features | Quantity per Cylinder |
|---|---|---|---|---|---|
| Stabilizer Piston Seal | CG-SPS-113-01 | HNBR with steel reinforcement | ID: 80mm | Double-lip with locking backup | 2 |
| Stabilizer Rod Seal | CG-SRS-113-01 | Polyurethane (EU) with PTFE | ID: 50mm | Triple-lip zero-drift design | 2 |
| Heavy-Duty Wiper | CG-HDW-113-01 | Triple-density composite | Wiper specific | Quad-lip with scraper | 1 |
| Stabilizer Wear Bands | CG-SWB-113-01 | Bronze-PTFE-steel laminate | Width: 20mm | Extra width for stability | 2 |
| Safety Backup Rings | CG-SBR-113-01 | PEEK-steel composite | Groove specific | Locking anti-extrusion | 4 |
| Component | Function | Material | Safety Specification |
|---|---|---|---|
| Locking Valve Seals | Hydraulic lock valve sealing | FKM with reinforcement | Withstands 25 MPa without creep |
| Pressure Relief Seals | Over-pressure protection | HNBR with pressure memory | Activates at 22 MPa |
| Drift Monitoring Seals | Visual drift indication | Color-changing polyurethane | Changes color at 0.5mm drift |
| Corrosion Barrier | External protection | Fluorocarbon coating | 500-hour salt spray resistance |
| Component Type | Material Specification | Total Quantity | Safety Application |
|---|---|---|---|
| Static O-Rings | FKM (Grade 80) | 16 | Hydraulic connections (both cylinders) |
| Port Seals | HNBR with steel anti-extrusion | 8 | High-pressure stabilizer ports |
| Gland Safety Gaskets | Fiber-metal composite | 2 | Redundant gland sealing |
| Thread Locking Compound | High-strength anaerobic | 1 kit | Prevents fitting vibration loosening |
| Safety Wire | Stainless steel 304 | 2 meters | Critical connection securing |
| Torque Stripes | Temperature-sensitive paint | 1 kit | Visual torque verification |
| Component | Safety Function | Included | Usage Requirement |
|---|---|---|---|
| Safety Cones | Installation zone marking | 4 | Required during service |
| Lockout Tags | Hydraulic system lockout | 2 | Must be used during disassembly |
| Pressure Test Plugs | Safe pressure testing | 2 | Required before disassembly |
| Leak Detection Dye | Post-installation verification | 1 bottle | Must be used before operation |
| Komatsu Model | Serial Number Range | Stabilizer Type | Safety Certification |
|---|---|---|---|
| WB140-2 | 1402001-1408000 | Dual vertical stabilizers | Full compatibility |
| WB140-2N | 140N001-140N500 | Enhanced safety system | Verify valve compatibility |
| WB140-2 Special | 140S001-140S200 | Wide pad option | Full compatibility |
| WB140-1 | Earlier models | Different design | NOT COMPATIBLE - SAFETY RISK |
| Component | Left Side | Right Side | Safety Requirement |
|---|---|---|---|
| Cylinder | Identical to right | Identical to left | Must be mirror images |
| Mounting | Mirror of right | Mirror of left | Perfect symmetry required |
| Hydraulics | Parallel circuit | Parallel circuit | Equal pressure/flow |
| Controls | Synchronized | Synchronized | Simultaneous operation |
| Certification | Requirement | Kit Compliance |
|---|---|---|
| ISO 13849 | Safety-related systems | Full compliance |
| ISO 12100 | Risk assessment | Documented compliance |
| ANSI/ASME B30.5 | Mobile crane safety | Relevant sections |
| OSHA 1926.600 | Earthmoving equipment | Full compliance |
| Feature | Purpose | Implementation |
|---|---|---|
| Redundant Sealing | Prevents single-point failure | Double-lip main seals |
| Drift Monitoring | Early warning of issues | Color-changing seal technology |
| Pressure Relief | Prevents over-pressure | Integrated relief protection |
| Corrosion Protection | Long-term reliability | Enhanced coating system |
| Coverage Type | Stabilizer Kit Warranty | Safety Requirements |
|---|---|---|
| Duration | 24 months or 2,500 hours | Must pass safety testing |
| Labor Coverage | 90 days through certified installers | Installation certification required |
| Failure Analysis | Immediate safety investigation | Mandatory for any stabilizer issue |
| Replacement Policy | 24-hour emergency replacement | For safety-related concerns |
| Safety Audit | Available upon request | Verifies proper installation |
| NO | Number | Name | Qty |
| 312630055 | BUCKET 4 IN 1, ASSY. | 1 | |
| 1 | 312230674 | BUCKET 4 IN 1 CYLINDER, ASSY. | 2 |
| 2 | 312230304 | • CYLINDER | 1 |
| 3 | 312230701 | • PISTON | 1 |
| 4 | 802510173 | • PEG | 1 |
| 5 | 312230702 | • CYLINDER HEAD | 1 |
| 6 | 312230303 | • PISTON ROD | 1 |
| 7 | 390600073 | • BUSHING | 1 |
| 827020113 | • GASKET KIT | 1 | |
| 8 | •• PISTON GASKET | 1 | |
| 9 | •• O RING | 1 | |
| 10 | •• O RING | 1 | |
| 11 | •• GASKET | 1 | |
| 12 | •• PROTECTION | 1 |
Mandatory Safety Workspace Requirements:
Designated safety zone with barrier tape
Machine on perfectly level, compacted surface
All other systems (boom, dipper, bucket) fully lowered and secured
Fire extinguisher readily accessible
First aid kit on-site
No other work within 10-meter radius
Required Safety Tools & Equipment:
Komatsu safety tool kit ST-WB140-2-S
Certified cylinder support stands (rated 2x expected load)
Digital pressure gauge with safety relief
Lockout/tagout kit with personal locks
Safety glasses, gloves, and steel-toe boots mandatory
Emergency hydraulic pressure relief tool
Non-Negotiable Safety Protocols:
Two-person minimum for all stabilizer work
Complete hydraulic system lockout/tagout
Pressure verification (zero pressure) before any disassembly
Continuous communication between technicians
Emergency procedure review before starting
⚠️ SAFETY-CRITICAL REQUIREMENTS:
ABSOLUTE: Two certified technicians minimum
MANDATORY: Complete lockout/tagout before ANY work
REQUIRED: Certified support equipment rated 2x load
ESSENTIAL: Perfect symmetry between stabilizers
NON-NEGOTIABLE: Comprehensive testing before use
⚠️ STABILIZER-SPECIFIC HAZARDS:
Machine collapse if stabilizers fail during operation
Hydraulic injection injury from high-pressure leaks
Crushing hazards during cylinder handling
Stability loss during testing if not properly supported
⚠️ TESTING SAFETY PROTOCOLS:
Never test without proper machine support
Always maintain communication between technicians
Constantly monitor for symmetry issues
Immediately stop if any abnormality detected
Contact COGENG
📞 Phone: +86-185-2913-1515
📧 Email: hugo@cogeng.net
💬 WhatsApp +86-185-2913-1515
💬 WeChat: +86-185-7865-1106
🌐 Website: cogeng.net
