SK60 SK70SR PC120 YN15V00003F1 TM18VD Nabtesco TM18 Travel Motor Final Drive Assembly Compatible with Kobelco Komatsu Sumitomo

1. Product Overview & Wholesale Price Range

The Nabtesco TM18 / TM18VD Travel Motor Final Drive Assembly (OEM Part # YN15V00003F1 / 18251-10000 / TM18 / TM18VD) combines both the 2-speed axial piston hydraulic travel motor and the heavy-duty planetary gear reduction box, designed for 6-to-12-ton excavators operating under continuous muddy crawling, slope climbing, and rough terrain operations.

• Factory Wholesale Price: $1,350 – $2,800 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• MOQ & Bulk Discount: 1 Unit (Tiered wholesale discounts available for batch container orders)
• Lead Time: 1–3 business days (Large factory stock ready for immediate worldwide dispatch)
• Warranty: 12 Months full replacement warranty with 100% bench pressure test video proof

2. Application Worksite Checklist (施工场景清单)

High-torque planetary gears engineered to deliver reliable track driving power across harsh jobsite environments:

• Highway Construction & Earthmoving: High continuous track speed under heavy soil hauling with Kobelco SK60 and SK70SR excavators.
• Deep Trenching & Steep Incline Digging: High climbing torque prevents track slipping when traveling up steep ditch slopes on Komatsu PC120 excavators.
• Forestry Land Clearing & Swampy Ground: Floating mechanical seals protect internal planetary gears against mud, water, and debris ingress.
• Demolition & Heavy Breaker Operations: Heavy-wall cast iron housing absorbs continuous track impact vibration from rock hammers.

3. Travel Motor Final Drive Troubleshooting & Diagnostic Guide (行走马达常见故障排查)

If your 6–12 ton excavator travel mechanism is exhibiting driving failure, consult the diagnostic guide below:

• Fault 1: Machine Off-Track / Deviating to One Side During Straight Travel (单边行走跑偏)
  Root Cause: Severe volumetric oil bypass across the cylinder block valve plate or worn piston slippers in one travel motor.
  Solution: Replace with a complete drop-in TM18 travel motor assembly (OEM YN15V00003F1) to restore dual-track torque balance.
• Fault 2: Weak Crawling Torque / Unable to Climb Steep Inclines (爬坡无力/行走瘫软)
  Root Cause: Main travel relief valve springs worn out or internal swashplate shoe friction galling.
  Solution: Recalibrate travel relief valve pressure or swap the complete pre-tested TM18 final drive unit.
• Fault 3: Abnormal Metallic Chattering & Grinding Noise From Reduction Gearbox (减速机异响/齿轮打齿)
  Root Cause: Broken teeth on planetary sun gears or severe race pitting on main drive shaft bearings.
  Solution: Inspect final drive oil for metallic filings and install a factory-new TM18 travel gearbox assembly.
• Fault 4: Gear Oil Leakage From Floating Seal / Drive Shaft Area (浮动封/驱动轴封漏油)
  Root Cause: High casing backpressure caused by a clogged motor drain line, or worn mechanical duo-cone floating seal rings.
  Solution: Flush casing drain line and replace with high-pressure duo-cone floating seal group.
• Fault 5: Travel Speed Switching Failure / Locked in Low Speed (高低速无法切换/单速死锁)
  Root Cause: Sticking 2-speed shifting pilot spool or damaged swashplate control piston seals.
  Solution: Clean 2-speed pilot shift valve gallery or replace complete TM18 motor control block.

4. Hot Machinery Replacement Parts Recommendation (5大品类热门推荐表)

Explore our factory-direct replacement hydraulic components compatible with major global excavator brands:

5. Frequently Asked Questions & Technical Support (QA 问答专区)

Q1: How do I verify if this TM18 travel motor fits my Kobelco SK60 or Komatsu PC120 excavator?
A: Check your original travel motor tag for OEM part numbers YN15V00003F1 or TM18VD stamp. You can also send us photos of your sprocket bolt holes and oil hose connection pattern for instant verification.

Q2: My Kobelco SK60 excavator travels off-track to the right side. Will replacing the TM18 motor solve this?
A: Yes, off-track deviation during straight travel is caused by internal volumetric bypass in the weak side travel motor. Installing our new pre-tested TM18 travel motor restores equal dual-track drive torque.

Q3: Is this Nabtesco TM18 travel motor final drive bench tested before shipment?
A: Yes, every single TM18 travel motor undergoes a high-pressure hydraulic bench test verifying 2-speed shifting, gear torque output (up to 320 Bar), and mechanical duo-cone floating seal tightness.