Undercarriage Product Group
FY Machinery supplies complete track adjuster assemblies and individual cylinders, recoil springs and support components for excavator and bulldozer undercarriages. An excavator assembly typically combines the adjuster cylinder, recoil spring and U-shaped mounting / support structure. Confirm the machine model, part number, mounting dimensions and overall length before quotation.
Track Adjusters & Recoil Springs
Product structure & supply scope
An excavator complete track adjuster assembly typically combines a track adjuster cylinder + recoil spring + U-shaped mounting / support structure. Customers commonly request the assembled unit. FY can also supply individual cylinders, springs and support components, with the required scope confirmed for the specific machine.
Specify the assembled cylinder, spring and support arrangement, together with mounting measurements and overall length.
Identify the cylinder, recoil spring or support component you need. Include photos and the part number so a component request is not confused with a complete unit.
Machine Applications
The track-adjustment and recoil system works with the front idler to support the undercarriage's tensioning function and accommodate recoil movement as operating loads change. Component layout and assembly scope vary by machine, so this overview does not provide model-specific tension settings or service procedures.
Excavator Application
An excavator track adjuster works within the machine's front-idler and track-tensioning arrangement. Replacement matching depends on the actual machine and on whether the request covers an individual component or a wider assembly.
View Excavator Undercarriage PartsBulldozer Application
Bulldozer track adjuster and recoil-component requests are reviewed in the context of the machine's front-idler and tensioning arrangement. No component form or assembly scope should be assumed across different machines.
View Bulldozer Undercarriage PartsRelated Component
The adjuster or tensioner arrangement works in relation to the front idler. Idler position and interface details can therefore provide useful context when a replacement part is being identified.
View IdlersRelated Component
Track-tension behavior is observed within the wider track system. Track chain and undercarriage configuration details can help clarify the application during product matching.
View Track ChainsFY technical guide · Type A–F
Type E and F are commonly requested complete-assembly configurations. Type A–D cover cylinder, component and other reference layouts. These letters identify the supplied reference set; confirm the actual supply scope and mounting configuration for your machine.
FY original schematics · Not to scale · Buyer reference only. A is the axial span shown for Types A–C/E/F; Type D uses M for the overall reference span and A for the shorter spring span. Other letters retain their raw values in the specifications. Exact letter-to-feature mappings, endpoints and tolerances must be checked on the product drawing. P/K labels without table values are omitted.
How to measure
Start with the machine model and part number. Identify a welded, single-hole-per-side or double-hole-per-side mounting arrangement. Measure the bolt-hole centre distances on the bottom / support mounting interface, following the same centre-to-centre logic as the idler. Also record the overall length and mark the endpoints.
Include measured mounting dimensions and overall length with units, photos, the machine model and any part number. Special / custom specifications require both a drawing and the pressure requirement. State the required pressure and its units in your inquiry; the reference tonnage is not a pressure rating.
Mounting examples explain the measuring method; they do not assign an installation form to every Type or code. Compare the idler mounting guide →
Selected technical references
Representative technical dimensions only, covering reference machine tonnages from 1.5T to 30T. Tonnage helps compare the reference range; it does not confirm fitment, pressure capability or the complete FY supply range. Type E/F are emphasised because these complete-assembly layouts are commonly requested.
Tap a card for all 10 raw reference fields.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Tap a card for all 10 raw reference fields.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Tap a card for all 10 raw reference fields.
G=Ø11 and H=/ remain as supplied; do not reassign the value to another letter. Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Tap a card for all 10 raw reference fields.
M is the overall reference span; A is the shorter spring span. Mounting form, exact measurement points and final configuration require confirmation against the drawing.
M is the overall reference span; A is the shorter spring span. Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Tap a card for all 10 raw reference fields.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Tap a card for all 10 raw reference fields.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Mounting form, exact measurement points and final configuration require confirmation against the drawing.
Choose complete assembly or individual component. In the inquiry message, include the mounting form, bolt-hole centre distances, overall length with units, a drawing reference and the required quantity. Use the existing form for machine model and part number. Special specifications additionally require a drawing and pressure requirement with units. Final configuration must be confirmed by model, part number, drawing and measured mounting dimensions.
Send Track Adjuster / Recoil Spring RFQ →Product Media
Product Configuration
Buyer and supplier terminology is not always used at the same level of assembly. The machine, existing part, interfaces, and requested supply scope must be checked before treating a name as a complete product definition.
Buyer Terminology
In parts terminology, Track Adjuster and Track Tensioner may refer to the tensioning function or to an assembly that performs it. The exact meaning should be confirmed for the specific request.
Component Scope
Recoil Spring refers specifically to the spring or recoil component. It should not be treated as an unconditional synonym for a complete track adjuster or track tensioner assembly.
Assembly Review
Track Adjuster Assembly, Track Tensioner Assembly, Recoil Spring Assembly, and Track Adjuster Spring Assembly may describe different scopes depending on the machine and supplier terminology.
Inspection Context
Leakage, visible damage, broken or displaced components, abnormal track-tension behavior, or unusual movement are reasons for qualified inspection. They are not universal replacement limits or repair instructions.
Product Identification
Similar-looking parts may have different interfaces or supply scopes. The following identification details help FY Machinery compare the requirement and prepare a clearer B2B quotation without assuming compatibility from appearance alone.
Read the buyer guideProvide the manufacturer name and complete model designation shown in the machine records or on the identification plate.
Share any reliable number from the existing adjuster or recoil spring, parts documentation, purchase record, or other available reference.
Send clear overall views plus close-ups of connection areas, interfaces, markings, visible damage, and the relationship with the front idler where practical.
Identify welded, single-hole-per-side or double-hole-per-side mounting. Measure the bolt-hole centre distances at the bottom / support interface and the overall length, with units and clearly marked measurement points.
Choose a complete assembled track adjuster or an individual cylinder, recoil spring or support component. Include a photo showing the exact scope required.
State the quantity required for the quotation and indicate whether the request covers individual components or matched assemblies.
A drawing is preferred for accurate confirmation. Special / custom specifications require a drawing plus the pressure requirement with units; tonnage does not replace a pressure requirement.
Order Review & Packing
Our production and international-sales teams work together on confirmed product and order requirements. Matching begins with the machine, requested assembly or component, mounting dimensions and drawing references.
Machine information, part references, photos, requested dimensions or interface references, required scope, and quantity are reviewed together before a replacement option is proposed.
Our production and sales teams coordinate after the part, assembly scope and order requirements have been clarified.
Confirmed product references, quantities, and agreed order requirements support practical quality and order follow-up during coordination.
Where appropriate, FY Machinery can help coordinate a production-site visit after the inquiry scope and visit arrangements are confirmed.
Buyer Questions
Yes. FY can supply a complete assembled track adjuster or individual cylinders, recoil springs and support components. An excavator complete assembly typically combines a track adjuster cylinder, recoil spring and U-shaped mounting / support structure. Confirm the exact scope for the machine before quotation.
No. Type E and F are commonly requested complete-assembly reference configurations. Type A–D illustrate cylinders, components and other layouts. The selected dimensions are representative references, and final configuration requires the machine model, part number, drawing and mounting measurements.
Provide a drawing and the pressure requirement with units, together with the machine details, requested scope, mounting dimensions and overall length. The reference tonnage does not identify a pressure rating.
A track adjuster is part of the undercarriage's track-adjustment system. It works with the relevant front-idler arrangement to support the tensioning function, but its exact component and assembly scope varies by machine.
The terms are sometimes used for the same tensioning function or assembly in parts inquiries, but their intended scope is not universal. Confirm the machine, existing part, interfaces, and requested assembly before matching.
No. A recoil spring is the spring or recoil component and should not automatically be treated as the complete adjuster. A Recoil Spring Assembly may also describe a different supply scope depending on the machine and supplier terminology.
Provide machine make and model, part number if known, complete assembly or component scope, photos, quantity, mounting form, bolt-hole centre distances and overall length with units. A drawing is preferred; special specifications require a drawing and pressure requirement.
Arrange a qualified inspection when leakage, visible damage, broken or displaced components, abnormal track-tension behavior, or unusual movement is observed. These clues are not universal replacement limits, maintenance intervals, or repair instructions.
Send an Inquiry
Choose complete assembly or individual component. Enter the machine model and part number in the inquiry form; include mounting form, bolt-hole centre distances, overall length with units, drawing reference and quantity in the message. For special specifications, also provide the drawing and pressure requirement with units.