| Parameter | Specification |
|---|---|
| COGENG Part Number | 144-63-05080 |
| OEM Reference | Komatsu 144-63-05080 |
| Roller Type | Track Roller / Track Carrier Roller |
| Roller Diameter | 150mm (5.91 inches) |
| Overall Width | 110mm (4.33 inches) |
| Shaft Diameter | 45mm (1.77 inches) |
| Bearing Type | Tapered roller bearings (2 pcs) |
| Seal Type | Floating ring seals (metal face) |
| Material | High-carbon steel (through-hardened) |
| Surface Hardness | 52-58 HRC (Rockwell C) |
| Case Depth | 8-12mm (hardened layer) |
| Core Hardness | 28-35 HRC |
| Bearing Clearance | 0.05-0.15mm (pre-set) |
| Lubrication | Oil bath (filled with 80-120ml EP90 gear oil) |
| Grease Fitting | Standard hydraulic fitting |
| Weight | 12.5 kg ±5% (27.6 lbs) |
| Load Capacity | Up to 8,500 kg per roller |
| Service Life | 3,000-5,000 hours (typical) |
| Component | COGENG Specification | Material | Special Features |
|---|---|---|---|
| Roller Body | Precision forged/cast | High-carbon steel | Through-hardened, wear-resistant |
| Shaft / Axle | Induction hardened | Alloy steel | Precision ground surface |
| Tapered Bearings | Premium grade (Class 3) | Chrome steel (52100) | Factory pre-set clearance |
| Floating Ring Seals | Metal face design | Cast iron + steel | Self-lubricating, abrasion-resistant |
| Torx Bolts | M12 x 1.75 (4 pcs) | Grade 10.9 steel | Corrosion-resistant coating |
| O-Ring Set | NBR/FKM composite | Rubber compound | Temperature range: -40°C to +120°C |
| Retaining Rings | External snap rings | Spring steel | Corrosion-resistant finish |
| Grease Fitting | Standard 1/8" NPT | Steel | Replaceable design |
| Model | Application Position | Notes |
|---|---|---|
| PC120-3 | Track roller | Original application |
| PC120-5 | Track roller | Verified fitment |
| PC120-6 | Track roller | Verified fitment |
| PC130-5 | Track roller | Verified fitment |
| PC130-6 | Track roller | Verified fitment |
| PC130-7 | Track roller | Verified fitment |
| PC150-5 | Track roller | Verified fitment |
| PC150-6 | Track roller | Verified fitment |
| Model | Application Position | Notes |
|---|---|---|
| D31EX-21 | Track roller | Verified fitment |
| D31PX-21 | Track roller | Verified fitment |
| D31P-21 | Track roller | Verified fitment |
| D37EX-21 | Track roller | Verified fitment |
| D37PX-21 | Track roller | Verified fitment |
| D39EX-21 | Track roller | Verified fitment |
| D39PX-21 | Track roller | Verified fitment |
| D31E-21 | Track roller | Verified fitment |
| Model | Series | Verification Status |
|---|---|---|
| PC150 | -3, -3E, -5, -6 | Confirmed fitment |
| PC120-1 | Early models | Cross-reference verified |
| PC120-2 | Mid-production | Cross-reference verified |
| D31E-21 | Complete series | Confirmed fitment |
| D31Q-21 | Complete series | Confirmed fitment |
Safety: Ensure machine is properly supported and tracks are relieved of tension
Tools Required: Torque wrench, bearing press, seal installation tools
Cleanliness: Clean work area to prevent contamination
Preparation:
Remove old track roller assembly
Clean mounting surface thoroughly
Inspect track frame for damage or wear
Roller Preparation:
Remove shipping plugs (if installed)
Fill with EP90 gear oil (80-120ml) through oil port
Install oil plug with thread sealant
Rotate roller to distribute oil internally
Mounting:
Position roller on track frame
Align mounting holes with track frame
Install mounting bolts with thread locker
Torque bolts to specified value
| Fastener | Torque Value |
|---|---|
| Mounting Bolts (M12 x 1.75) | 120-140 N·m (89-103 ft-lbs) |
| Oil Plug (Fill port) | 20-25 N·m (15-18 ft-lbs) |
| Grease Fitting | 10-15 N·m (7-11 ft-lbs) |
| Machine Type | Track Sag (between carrier and sprocket) |
|---|---|
| Excavator (standard) | 30-50mm (1.2-2.0 inches) |
| Dozer (standard) | 20-40mm (0.8-1.6 inches) |
| Heavy-duty application | 25-35mm (1.0-1.4 inches) |
Always refer to equipment service manual for specific track tension specifications
⚠️ IMPORTANT SAFETY NOTES:
ALWAYS relieve track tension before removing any undercarriage components
ALWAYS support machine properly on blocks or stands
NEVER work under unsupported tracks or components
ALWAYS use proper lifting equipment for heavy components (12.5kg roller)
⚠️ INSTALLATION REQUIREMENTS:
MANDATORY: Fill roller with EP90 gear oil before installation
REQUIRED: Use thread locker on all mounting bolts
IMPORTANT: Do not overfill (max 120ml oil)
CHECK: Rotate roller after installation to verify smooth operation
| Operation | Interval | Procedure |
|---|---|---|
| Visual inspection | Daily | Check for leaks, damage, unusual wear |
| Oil level check | 250 hours | Refill if necessary |
| Bolt torque verification | 500 hours | Re-torque mounting bolts to spec |
| Complete rebuild | 3,000-5,000 hours | Replace bearings, seals, inspect roller body |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Leaking oil | Failed floating ring seals | Replace roller or rebuild with seal kit |
| Rough rotation | Bearing failure, contamination | Replace roller |
| Excessive wear | Abrasive conditions, lack of lubrication | Check oil level, consider more frequent maintenance |
| Loose mounting | Bolts loosened from vibration | Re-torque with thread locker |
| Noise during operation | Bearing wear, lack of oil | Inspect oil level, replace if damaged |
COGENG track rollers are manufactured under strict quality control standards:
| Quality Parameter | Specification |
|---|---|
| Material Certification | Full traceability on all steel components |
| Hardness Testing | 100% inspected (52-58 HRC surface) |
| Dimensional Verification | ±0.1mm on critical dimensions |
| Seal Integrity Test | Pressure tested before shipment |
| Bearing Preload | Factory pre-set, verified on each unit |
| ISO Compliance | ISO 9001:2015 certified manufacturing |
| Item | Details |
|---|---|
| COGENG Part Number | 144-63-05080 |
| OEM Cross Reference | Komatsu 144-63-05080 (direct replacement) |
| Unit of Sale | Each (individual roller) |
| Packaging | Individual carton with protective packaging |
| Warranty | 12 months or 1,500 operating hours |
| Quantity | Discount | Lead Time |
|---|---|---|
| 2-4 rollers | 5% | In stock |
| 5-9 rollers | 10% | 5-7 business days |
| 10+ rollers | 15% | Call for availability |
| Brand | Equivalent Part Number |
|---|---|
| Komatsu OEM | 144-63-05080 |
| ITR | 144-63-05080 |
| KMP | 144-63-05080 |
| HZ Parts | R144-63-05080 |
| CTI | TR-15045 |
