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Idler Assembly 131-30-00285 Komatsu Bulldozer
Idler Assembly 131-30-00285 Komatsu Bulldozer

Idler Assembly 131-30-00285 Komatsu Bulldozer

Idler Assembly 131-30-00285 Komatsu Bulldozer

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Product Detail

Product Description: Idler Assembly 131-30-00285 for Komatsu Bulldozer

The Idler Assembly 131-30-00285 is a genuine Komatsu OEM component designed specifically for the undercarriage systems of medium-duty Komatsu crawler bulldozers. This weldless idler assembly serves as a front idler (guide wheel)—the critical structural component positioned at the front of the track frame assembly. It is responsible for guiding the track chain, maintaining proper track tension in coordination with the track adjuster mechanism, and absorbing the high‑impact shock loads generated during dozing operations

1. Primary Idler Assembly

Part NumberPart Name / DescriptionApplication / Notes
131-30-00285IDLER GROUP / Front Idler AssemblyKomatsu D50A‑16, D50F‑16, D50S‑16, D53A‑16, D53S‑16, D53A‑17, D58E‑1, D80A‑12, D80P‑12, D85A‑12 bulldozers; also fits D41E‑3, D45E‑1, D45S‑1, D53A‑18, D53S‑18, D60A‑6, D65E‑6, D65P‑6, D65S‑6, D65EX‑15, D80E‑18, D80P‑18, D85A‑18, D85E‑18, D85EX‑15, D85PX‑15; weldless construction; weight 350.3 lbs; manufactured in Japan; OEM genuine Komatsu spare part; also known as KM841 IDLER GROUP

2. Alternative Idler Assembly & Related Part Numbers

Part NumberPart Name / DescriptionApplication / Notes
154-30-00290Front Idler WheelKomatsu D80A‑12, D80P‑12, D85A‑12; aftermarket alternative by CARTEX with OEM fitment
154-30-00292Front Idler WheelKomatsu D85 bulldozer (various configurations); aftermarket heavy‑duty replacement
154-30-01010Idler RollerKomatsu D85EX‑15, D85PX‑15; induction‑hardened tread; premium floating seals

3. Sealing Components (Idler – Floating Seal / Oil Seal)

These components are essential for idler overhaul when the idler assembly remains within serviceable dimensions but seals have failed or internal bearings require replacement.

Part NumberPart Name / DescriptionApplication / Notes
14X-30-00270Floating Seal (Lapped Cast Iron)Komatsu undercarriage; primary seal component for idler assemblies across D50–D85 series; ring‑and‑cone design for long life in extreme conditions
14X-30-00150O‑Ring (Floating Seal)Komatsu undercarriage; secondary elastomeric seal energises the floating seal ring
07000-15105O‑Ring (Case Drain / Mounting)Komatsu heavy equipment; general sealing for idler mounting interfaces

4. Associated Undercarriage Components (for reference)

These components work alongside the idler assembly and should be inspected during undercarriage maintenance:

Part NumberPart Name / DescriptionApplication / Notes
203-30-00140Track Adjuster Assembly (complete)D50/D53 series; includes adjuster cylinder, yoke, and seals
175-30-12430Track Adjuster Assembly (complete)D65E‑5, D65P‑5, D65EX‑15; larger series track adjuster
154-30-00113Recoil Spring (Track Tension)D80/D85 series; spring component of track tension system
154-30-00112Recoil Spring (Track Tension)D80/D85 series; alternative spring specification
203-30-00060Yoke Assembly (Idler Mount)D50/D53 series; mounting bracket for idler adjuster
203-30-00070Yoke Assembly (Idler Mount)D50/D53 series; alternative yoke for adjustable track frames

5. Komatsu Undercarriage Specifications – Idler Series

Idler Part NumberWeight (approx.)Compatible Komatsu Models
131-30-00285350.3 lbs (159 kg)D50‑16, D53‑16/17, D58E‑1, D80‑12, D85‑12
KM841 IDLER GROUP391 lbs (177 kg)D41E‑3, D45E‑1, D45S‑1, D50A/F/S‑16, D53A/S‑16, D53S‑17
154-30-00290Not specifiedD80A‑12, D80P‑12, D85A‑12


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Product Detail

Product Description: Idler Assembly 131-30-00285 for Komatsu Bulldozer

The Idler Assembly 131-30-00285 is a genuine Komatsu OEM component designed specifically for the undercarriage systems of medium-duty Komatsu crawler bulldozers. This weldless idler assembly serves as a front idler (guide wheel)—the critical structural component positioned at the front of the track frame assembly. It is responsible for guiding the track chain, maintaining proper track tension in coordination with the track adjuster mechanism, and absorbing the high‑impact shock loads generated during dozing operations

1. Primary Idler Assembly

Part NumberPart Name / DescriptionApplication / Notes
131-30-00285IDLER GROUP / Front Idler AssemblyKomatsu D50A‑16, D50F‑16, D50S‑16, D53A‑16, D53S‑16, D53A‑17, D58E‑1, D80A‑12, D80P‑12, D85A‑12 bulldozers; also fits D41E‑3, D45E‑1, D45S‑1, D53A‑18, D53S‑18, D60A‑6, D65E‑6, D65P‑6, D65S‑6, D65EX‑15, D80E‑18, D80P‑18, D85A‑18, D85E‑18, D85EX‑15, D85PX‑15; weldless construction; weight 350.3 lbs; manufactured in Japan; OEM genuine Komatsu spare part; also known as KM841 IDLER GROUP

2. Alternative Idler Assembly & Related Part Numbers

Part NumberPart Name / DescriptionApplication / Notes
154-30-00290Front Idler WheelKomatsu D80A‑12, D80P‑12, D85A‑12; aftermarket alternative by CARTEX with OEM fitment
154-30-00292Front Idler WheelKomatsu D85 bulldozer (various configurations); aftermarket heavy‑duty replacement
154-30-01010Idler RollerKomatsu D85EX‑15, D85PX‑15; induction‑hardened tread; premium floating seals

3. Sealing Components (Idler – Floating Seal / Oil Seal)

These components are essential for idler overhaul when the idler assembly remains within serviceable dimensions but seals have failed or internal bearings require replacement.

Part NumberPart Name / DescriptionApplication / Notes
14X-30-00270Floating Seal (Lapped Cast Iron)Komatsu undercarriage; primary seal component for idler assemblies across D50–D85 series; ring‑and‑cone design for long life in extreme conditions
14X-30-00150O‑Ring (Floating Seal)Komatsu undercarriage; secondary elastomeric seal energises the floating seal ring
07000-15105O‑Ring (Case Drain / Mounting)Komatsu heavy equipment; general sealing for idler mounting interfaces

4. Associated Undercarriage Components (for reference)

These components work alongside the idler assembly and should be inspected during undercarriage maintenance:

Part NumberPart Name / DescriptionApplication / Notes
203-30-00140Track Adjuster Assembly (complete)D50/D53 series; includes adjuster cylinder, yoke, and seals
175-30-12430Track Adjuster Assembly (complete)D65E‑5, D65P‑5, D65EX‑15; larger series track adjuster
154-30-00113Recoil Spring (Track Tension)D80/D85 series; spring component of track tension system
154-30-00112Recoil Spring (Track Tension)D80/D85 series; alternative spring specification
203-30-00060Yoke Assembly (Idler Mount)D50/D53 series; mounting bracket for idler adjuster
203-30-00070Yoke Assembly (Idler Mount)D50/D53 series; alternative yoke for adjustable track frames

5. Komatsu Undercarriage Specifications – Idler Series

Idler Part NumberWeight (approx.)Compatible Komatsu Models
131-30-00285350.3 lbs (159 kg)D50‑16, D53‑16/17, D58E‑1, D80‑12, D85‑12
KM841 IDLER GROUP391 lbs (177 kg)D41E‑3, D45E‑1, D45S‑1, D50A/F/S‑16, D53A/S‑16, D53S‑17
154-30-00290Not specifiedD80A‑12, D80P‑12, D85A‑12


Idler Assembly 131-30-00285 Komatsu Bulldozer
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Contact us

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WeChat:172 6962 9279

E-mail:asher@wuchenjialianspareparts.com

Tel:+86-172 696 29279

Address:No. 667, Zhujiang Road, Xuejiadao 

Street, Huangdao District, Qingdao, Qingdao Area, China (Shandong) Pilot Free Trade Zone

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Excavator Parts
Wheel Loader Accessories
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Downloads

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