COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance

COGENG 707-52-91150 Komatsu Heavy-Duty Rod Bushing Assembly

Product name: Komatsu  Hydraulic Cylinder Service Kit  
Part No: 707-52-91150 7075291150
Size:40 MM
Model Number:For     PC300-6, PC300-7, PC300-8 WA380-3, WA380-5 D85EX-12, D85PX-12  etc. 
Material:Lron+Rubber
Packing:PP bag inside, carton box outside
Payment Terms:Western Union, L/C, T/T, MoneyGram, D/A, D/P
MOQ:Acceptable trial order
Shipping Mode:By air, by sea, by express(Fedex, UPS, DHL, TNT, etc.)
Place of Origin:Guangdong, China
Brand name:COGENG
CertifiCATEEion:ISO9001
Supply :500PCS
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance
  • COGENG  707-52-91150   Komatsu Heavy-Duty Rod Bushing Assembly,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG Komatsu Heavy-Duty Rod Bushing Assembly KOM-707-52-91150 | Precision 140mm Bearing Surface for Hydraulic Cylinder Performance

Desciption

Technical Constants & Performance Data

Parameter Specification Testing Standard
Inner Diameter 140.00mm (+0.025/-0.000mm) ISO 286-2
Outer Diameter 155.00mm (+0.000/-0.015mm) ISO 286-2
Width/Height 45.00mm (±0.10mm) ISO 2768-mK
Wall Thickness 7.50mm (±0.05mm) ISO 2768-mK
Material Composition CuSn12 Bronze (SAE 660) ASTM B505
Surface Treatment PTFE-Impregnated (0.10mm depth) Proprietary Process
Hardness 85-95 HB (Brinell) ASTM E10
Tensile Strength ≥ 310 MPa (44,960 PSI) ASTM E8
Yield Strength ≥ 140 MPa (20,305 PSI) ASTM E8
Elongation ≥ 20% ASTM E8
Coefficient of Friction 0.08-0.12 (against chrome) ASTM D1894 modified
PV Limit 2.8 MPa·m/s continuous ISO 13738
Maximum Load 45 kN (10,116 lbf) radial ISO 12129-1
Temperature Range -40°C to +180°C (-40°F to +356°F) ASTM D2000
Thermal Expansion 18.0 x 10⁻⁶/K ASTM E228
Oil Capacity 15-20% by volume (porous layer) ASTM B328
Surface Finish Ra 0.4µm (ID), Ra 1.6µm (OD) ISO 1302
Roundness ≤ 0.005mm ISO 1101
Parallelism ≤ 0.008mm ISO 1101



Component Specifications & Features Table

Feature Specification Benefit
Material Grade SAE 660 Bronze (CuSn12) Excellent wear resistance, good corrosion resistance
Manufacturing Process Centrifugal casting + CNC machining Optimal grain structure, precise dimensions
Oil Groove Pattern Helical + circumferential grooves Ensures even oil distribution, prevents dry spots
Surface Treatment PTFE impregnation (0.10mm deep) Reduces breakaway friction, provides dry lubrication backup
Installation Features Split design with alignment marks Easy installation without special tools
Quality Marks Laser-etched part number & orientation Ensures correct installation, traceability
Load Distribution 120° optimized load zones Maximizes bearing surface under typical side loads
Thermal Management Integrated heat dissipation channels Prevents thermal expansion issues



Comparative Performance Data

Characteristic COGENG Premium Standard OEM Aftermarket Standard
Service Life 8,000-10,000 hours 5,000-7,000 hours 3,000-5,000 hours
Load Capacity 45 kN 40 kN 35 kN
Friction Coefficient 0.08-0.12 0.12-0.18 0.15-0.25
Wear Rate 0.001mm/1,000h 0.002mm/1,000h 0.003mm/1,000h
Temperature Range -40°C to +180°C -30°C to +150°C -20°C to +120°C


Primary Applications Table

Equipment Type Komatsu Models Cylinder Application Quantity per Cylinder Notes
Hydraulic Excavators PC300-6, PC300-7, PC300-8 Boom Cylinder (Secondary) 2 Lower gland position
PC350-6, PC350-7 Arm Cylinder 1 Gland assembly
PC400-6, PC400-7 Bucket Cylinder 1 High-cycle application
Wheel Loaders WA380-3, WA380-5 Lift Cylinder 2 Upper and lower positions
WA420-3, WA420-5 Tilt Cylinder 1 Gland assembly
Crawler Dozers D85EX-12, D85PX-12 Blade Lift Cylinder 1 High side-load application
D155AX-5, D155AX-6 Blade Tilt Cylinder 1 Moderate cycle rate
Motor Graders GD655-5, GD675-3 Moldboard Lift Cylinder 1 Precision application



Detailed Compatibility Chart

Original Part Number COGENG Equivalent Bushing Type Load Rating Special Features
KOM-707-52-91150 CG-RB-140-P Standard Premium 45 kN PTFE impregnated
707-52-91150 CG-RB-140-S Standard 40 kN Oil grooves only
707-52-91151 CG-RB-140-HD Heavy Duty 50 kN Reinforced design
707-52-91152 CG-RB-140-HT High Temperature 45 kN Extended temp range



Application-Specific Recommendations

Application Recommended Variant Special Instructions
High Side Load CG-RB-140-HD Check alignment every 500 hours
High Temperature CG-RB-140-HT Monitor fluid temperature
Contaminated Environment CG-RB-140-P Increase wiper maintenance
High Cycle Rate CG-RB-140-P Check wear every 1,000 hours



Wear Limits & Replacement Criteria

Measurement New Specification Service Limit Replacement Required
ID Wear 140.00-140.03mm 140.08mm ≥140.10mm
Clearance Increase 0.02-0.06mm 0.10mm ≥0.12mm
Out-of-Round ≤0.005mm 0.015mm ≥0.020mm
Surface Scoring None visible ≤0.02mm depth ≥0.03mm depth


Decompose pictures


Parts list
NO Number Name Qty
707-00-03311 CYLINDER ASS'Y 2
1 707-11-70190 • CYLINDER 1
2 07042-20108 • PLUG 1
3 707-76-40020 • BUSHING 1
4 707-29-70620 • HAED.CYLINDER 1
5 707-52-90150 • BUSHING 1
CYL  707-00-0A032
707-00-0A033
707-00-0A012
707-00-0A022
707-00-0H610
707-00-0H860
707-00-0H470
707-00-0H480
6 707-51-40030 • PACKING,ROD 1
7 198-63-75190 • SEAL.DUST 1
8 07179-12052 • RING.SNAP 1
9 07000-12065 • O-RING 1
10 07146-02066 • RING,BACK-UP 1
11 07000-12070 • O-RING 1
12 707-59-40091 ROD.PISTON 1
13 707-36-70270 • PISTON 1
14 707-44-70180 • RING.PISTON 1
15 07156-00710 • RING.WEAR 1
16 07165-13033 • NUT 1
17 707-51-40640 RING BUFFER 2


Installation decomposition diagram

Warranty Coverage

  • Materials Warranty: 24 months unlimited hours

  • Performance Warranty: 18 months or 4,000 operating hours

  • Installation Support: Technical guidance included

  • Failure Analysis: Available for warranty claims

Technical Support Services

  • Engineering Support: Available for application questions

  • Installation Guidance: Step-by-step technical assistance

  • Training: Bearing installation certification available

Regular Inspection Schedule

Interval Inspection Type Acceptable Limits
500 hours Visual inspection No visible wear, proper lubrication
1,000 hours Clearance check ≤0.08mm rod-to-bushing clearance
2,000 hours Full measurement All dimensions within service limits
Oil Change Contamination check No bronze particles in fluid


Troubleshooting Guide

Symptom Possible Cause Corrective Action
Excessive Play Bushing wear Measure and replace if beyond limits
Binding/Rough Operation Misalignment Check rod straightness and alignment
High Temperature Insufficient clearance Verify proper installation clearance
Metal Particles in Fluid Bushing failure Immediate inspection and replacement

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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