Idler Wheel for Hitachi EX3600-6 Excavator | 9185119
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- Commodity name: Idler Wheel for Hitachi EX3600-6 Excavator | 9185119
Hitachi EX3600-6 Excavator 9185119
Idler Wheel for Hitachi EX3600-6 Excavator | 9185119
Product Overview
The idler wheel (also known as front idler or track idler) is a critical undercarriage component of your Hitachi EX3600-6 mining excavator. Positioned at the front of the track frame, the idler wheel guides the track chain and works in conjunction with the track adjuster cylinder to maintain proper track tension. It serves as the pivot point around which the track chain rotates, ensuring smooth track travel and proper alignment during machine operation in demanding mining environments.
The Hitachi EX3600-6 is a 362-ton ultra-class mining excavator powered by two Cummins QSKTA60-CE engines producing 1,450 kW (1,944 HP) each . The backhoe configuration has an operating weight of 361,000 kg (795,900 lbs), while the loading shovel configuration weighs 359,000 kg (791,500 lbs) . This genuine Hitachi idler wheel (Part No. 9185119) is engineered to exacting OEM specifications for perfect fit, reliable performance, and maximum service life.
This is a genuine Hitachi original equipment part.
Technical Specifications
Parameter
Specification
Part Number
9185119
Alternate/OEM Numbers
9066270, 342483, 1009854
Manufacturer
Hitachi Construction Machinery
Component Type
Idler wheel / Front idler / Track idler
Application
Track tensioning and guidance
Machine Model
EX3600-6 Mining Excavator
Operating Weight (Backhoe)
361,000 kg (795,900 lbs)
Operating Weight (Shovel)
359,000 kg (791,500 lbs)
Engine Power
2 × 1,450 kW (2 × 1,944 HP)
Idler Type
Single flange / Center guide
Material
Forged alloy steel, heat-treated
Surface Hardness
52–58 HRC (mining duty)
Bearing Type
Sealed tapered roller bearing
Lubrication
Grease-packed
Mounting Type
Slide fit on track frame with adjuster cylinder
Please verify exact specifications with your machine's technical manual or existing component.
EX3600-6 Undercarriage Overview
The Hitachi EX3600-6 features a reinforced undercarriage system designed for extreme mining conditions. According to the EX3600-6 Workshop Manual, the undercarriage components include:
Component
Function
Manual Reference
Idler Wheel (9185119)
Track guidance and tensioning at front
Group: Front Idler
Track Adjuster Cylinder
Maintains track tension
Group: Adjuster Cylinder
Carrier Rollers
Supports upper track chain run
Group: Upper and Lower Roller
Track Rollers
Supports machine weight
Group: Upper and Lower Roller
Travel Device
Propels machine
Group: Travel Device
Drive Tumbler (Sprocket)
Engages track chain
Group: Drive Tumbler
Center Joint
Hydraulic fluid transfer
Group: Center Joint
Track Assembly
Ground contact and propulsion
Group: Track
Key Undercarriage Features
- Cast steel center track frame integrated to avoid stress concentration
- High-mounted compact travel motors protected from rock damage
- Rigid box design resists bending and twisting forces
- Replaceable wear plates at idler mounting points
Function & Operation
Function
Description
Track Guidance
Guides the track chain as it rotates around the undercarriage
Tension Maintenance
Works with adjuster cylinder to maintain proper track tension
Direction Change
Serves as the pivot point for track chain direction change at front
Shock Absorption
Absorbs impact loads when traveling over obstacles
Operating Principle
- Track chain travels from drive sprocket (rear) around idler wheel (front)
- Idler wheel rotates as track chain moves
- Track adjuster cylinder pushes idler forward to maintain tension
- Idler flanges guide track chain, preventing derailment
- Internal bearings allow smooth rotation with minimal friction
Compatible Hitachi Models
Series
Models
Primary
Hitachi EX3600-6 Mining Excavator
Also Compatible
EX3600-6 Backhoe, EX3600-6 Loading Shovel
Important:The EX3600-6 idler wheel (9185119) is confirmed to be compatible with backhoe and loading shovel configurations . Please verify your machine's serial number and specific undercarriage configuration with our parts department to ensure correct compatibility. Alternate part numbers include 9066270, 342483, and 1009854 .
Genuine Hitachi Quality
Component
Feature
Benefit
Idler Body
Forged alloy steel, heat-treated
Exceptional wear resistance in mining conditions
Flanges
Precision-machined
Proper track chain guidance, prevents derailment
Bearings
Heavy-duty sealed tapered roller
Extended service life, contamination protection
Seals
Genuine Hitachi high-pressure seals
Leak-free operation, debris exclusion
Surface
Hardened to mining specifications
Resists abrasion from track chain contact
Tread
Precision-ground profile
Smooth track chain engagement
Key Features
- Precision-machined for exact OEM fitment
- Heat-treated for maximum wear resistance
- Sealed bearing design for contamination protection
- Tested under toughest mining conditions
- Designed and engineered specifically for EX3600-6
- Direct replacement for original equipment
Common Failure Signs
Symptom
Likely Cause
Track derailment
Worn idler flanges, improper alignment
Excessive track sag at front
Idler bearing failure, adjuster cylinder issues
Unusual noise from front of track
Bearing wear, flange damage
Idler does not rotate freely
Bearing failure, seal damage
Uneven track wear pattern
Idler misalignment, wear
Metal particles in grease
Bearing spalling, internal wear
Visible flange wear or damage
Track misalignment, impact damage
Genuine Part Assurance
Assurance
Detail
Authenticity
100% genuine Hitachi part
Condition
New
Warranty
Full Hitachi manufacturer's warranty
Packaging
Original Hitachi heavy-equipment industrial packaging
Origin
Japan
Note:Hitachi Genuine Parts are manufactured using high-quality materials and tested under the toughest conditions to guarantee reliable performance.
Installation Guidelines
Critical Requirements
- Verify part number matches your machine's requirements
- Prepare adequate heavy lifting equipment - Idler wheel is heavy
- Support machine securely with track blocked
- Relieve track tension before removal using track adjuster
- Maintain cleanliness - Contamination causes bearing failure
- Use new hardware where specified
Installation Steps
- Position machine on level ground, block tracks securely
- Relieve track tension using track adjuster grease valve
- Remove track chain or create slack for idler access
- Clean idler area thoroughly
- Remove mounting bolts or retainers securing idler
- Remove old idler wheel from track frame
- Clean idler mounting surface and slide rails
- Inspect adjuster cylinder rod for damage
- Inspect idler mounting slide rails for wear
- Install new genuine Hitachi idler wheel (9185119)
- Apply grease to slide surfaces if specified
- Install retaining hardware and torque to Hitachi specifications
- Apply track tension to specification using track adjuster
- Reinstall track chain if removed
- Test track operation in forward and reverse
Post-Installation
- Verify idler rotates freely
- Check for proper track alignment
- Inspect for unusual noise during track operation
- Re-check track tension after initial operation
- Re-torque mounting hardware after initial operation (if specified)
IMPORTANT:Installation must only be performed by qualified mining equipment technicians following procedures in the EX3600-6 Workshop Manual, specifically SECTION 3 UNDERCARRIAGE - Group: Front Idler.
Maintenance Recommendations
Interval
Maintenance Task
Daily
Visual inspection for damage, unusual noise, track alignment
Weekly
Check for proper rotation, inspect seals and flanges
Monthly
Grease idler fittings (if applicable)
Every 500 hours
Check for wear, measure idler diameter
Every 1000 hours
Check idler alignment with track chain
Every 2000 hours
Inspect bearings and seals
Every 5000 hours
Perform detailed undercarriage inspection
As Needed
Replace when worn or damaged
Critical Notes
- Always use genuine Hitachi replacement parts
- Regular greasing extends bearing life
- Worn idler accelerates track chain and adjuster wear
- Replace idler in pairs for even undercarriage wear (both sides)
- Proper track tension is critical for idler and track chain life
Ordering Information
Part Number:9185119
Alternate Numbers:9066270, 342483, 1009854
Product Name:Idler Wheel / Front Idler / Track Idler (Genuine Hitachi)
Application:Hitachi EX3600-6 Mining Excavator
Condition:New Genuine OEM Part
Recommended Related Parts
Component
Part Number
Notes
Track Adjuster Cylinder
Contact parts department
Inspect during idler replacement
Adjuster Seal Kit
Contact parts department
If adjuster service needed
Track Chain Assembly
Contact parts department
Inspect for wear
Carrier Roller
9215482
Upper track support
Track Roller (Lower)
Contact parts department
8 per side
Quantity per Machine
The Hitachi EX3600-6 is equipped with 1 idler wheel per side (total of 2 per machine).
Service Manual Reference
The EX3600-6 idler wheel and undercarriage system are comprehensively documented in the following factory service publications:
Document
Reference
Content
Workshop Manual
W18ME00
SECTION 3 UNDERCARRIAGE - Front Idler
Assembly Manual
KO32601
Undercarriage assembly procedures
Check Sheets
KO33300, KO33400
Maintenance inspection points
Operational Principle Manual
TO18ME00
Component operation theory
Product Source Information
The idler wheel 9185119 is available through authorized Hitachi parts distribution channels. For EX3600-6 undercarriage components, it is recommended to contact parts specialists with your machine serial number for accurate compatibility verification .
Hitachi EX3600-6 is a registered trademark of Hitachi Construction Machinery. All genuine parts are sourced through authorized distribution channels. Service manual reference: Hitachi EX3600-6 Workshop Manual (W18ME00), SECTION 3 UNDERCARRIAGE - Group: Front Idler. Product specifications are subject to change without notice .
Factory
Factory 05
Factory 04
Factory 03
Factory 02
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