Undercarriage Inspection Records: What to Photograph and Measure Before a Parts Inquiry

A message saying “the left track looks worn” leaves a lot to explain. Which part of the track? What did the person on site see? Was anything measured, or is the request based on a photograph?

For a parts discussion with XINYA, we suggest starting with a record of the undercarriage as it is installed. Put the observations beside photographs of the same locations, then add any measurements already taken by the maintenance team.

Keep the question about the required part separate from the question of whether a component needs replacement.

This excavator undercarriage inspection checklist is a way to organize that information before an inquiry. It provides no universal wear limit or replacement verdict.

Measurement methods, machine preparation and technical assessment belong to the applicable equipment instructions and the people responsible for the inspection.

Define the inspection record before the walk-around

Start a sheet with the machine reference, inspection date and the name of the person recording the observations. We would also leave a place for the inspection’s purpose: a reported leak, a damaged shoe, a question about track condition, or another concern described by the site team.

Use this sheet for a crawler undercarriage. Our comparison of crawler and wheeled excavator parts covers the different component families. There is no reason to add wheel-end or axle checks to this particular record.

Which side am I looking at? That is the first question we would want the photo labels to answer. Our suggested heading for the sheet is “Side convention,” followed by the site’s explanation. Add a note about the end from which positions are counted along each track.

Use that note when arranging the photographs, with the same position label on the corresponding entry.

For the buyer, the next conversation is with the maintenance team: what photographs and readings are available from their inspection? Request those materials.

This suggested file is not an instruction to prepare the machine differently; we give no lifting, track-movement, dismantling or tension-adjustment procedure.

Photograph the same positions on both tracks

We would start the file with the left and right overviews, each carrying the site’s side label and the inspection date. Under those views, place the detail images for the areas inspected. The intended reading order is straightforward: the whole side first, then the particular area being discussed.

The chain, shoe surfaces, sprocket profile, rollers and idler all belong in the picture list. Track rollers carry the lower track run; carrier rollers support the return run. If the name of a photographed part is uncertain, describe where it sits and show the adjoining parts.

We would rather receive that description than a name the recorder has had to guess.

Our excavator chassis parts category provides a starting point for component terminology. Use the catalog to discuss the component category. For the condition question, we would still request the photograph taken on the machine.

Put any catalog reference beside it, labelled as a reference, and retain the original field view.

For a detail image, our accompanying request would be: “Please also show where this is on the track.” Keep the returned view beside the close-up and put the position reference on both. An area that could not be seen should have an entry saying that.

Leave the gap visible; another machine’s photograph would not be our answer to it.

Our example filenames would be L03-overview and L03-detail, with a note explaining L03 on the sheet. A site with its own labels need not adopt these examples. We would request an explanation of its labels and use that explanation when reading the photographs.

Give each close-up a location and an observation

Compare what the site has reported for the two tracks: sag, any roller leakage, sprocket teeth that look sharp, and cracked shoes. Give each observation its own position reference.

We would quote the recorder’s description here and leave the technical assessment alongside it, under the name of the person who made that assessment.

For example, a hypothetical entry might read “left lower roller, position three: wet area visible, photo L03.” That says where to look. Calling it a failed seal would add an explanation that this example has not established.

We would keep any proposed cause in a separate note, attributed to whoever assessed it.

For a hypothetical cracked-shoe entry, a close-up would prompt our next question: “Could you mark this shoe on the wider view?” File that marked view with the original image. With a sprocket, request the tooth-profile view together with its position by the chain.

If the detail is hidden or too dark, our next request would be for the site team’s description of what they could see.

A ruler or tape can be included for scale. We would file that photograph with the other views, then ask separately for any reading the inspector actually took. Where no reading was taken, enter “not measured.” We are requesting the site record, not a dimension estimated later from its photograph.

Separate condition measurements from ordering dimensions

What is the number being requested for? Write that question above the measurement fields. A track-sag reading belongs with the condition record. Shoe width, link count and sprocket tooth count may be requested to identify the installed component.

We would give those two groups separate spaces on the sheet.

For condition measurements already available, request the feature measured, location, reading, unit and the method or manual reference used. Alongside it, copy the date and the conditions reported by the inspector.

If an assessment refers to a limit, we would ask which document supplied that limit and attach the reply there.

Questions about straightedge position, preparation for a sag check or an acceptable reading need the applicable instructions. We provide none of those values here.

Refer an incomplete measurement record to the technical team responsible for it, with a note identifying the method or reference still requested.

For identification, undercarriage details can include track pitch, link count, roller width, sprocket tooth count and shoe width. Our guide to identifying a replacement without a part number covers that earlier matching task.

Here, attach any requested dimensions to the relevant installed position; do not turn them into a wear percentage or remaining-life estimate.

Build a field sheet that leaves unknowns visible

Use one line for each inspected position or concern. The following is a blank reporting aid. All its entries are prompts for information; no inspection has been carried out for this example.

Try reading one completed row without opening the rest of the conversation. Can you locate the component? Can you find its photograph? Can you distinguish a visual observation from a measured value? We suggest using those questions as a final check of the file’s presentation.

Avoid a single “checked” box for the whole undercarriage. We prefer to see which areas were observed, which were measured and which remain unrecorded. That is the level of detail we would request before discussing the parts question.

Send the inspection record with the parts question

Keep the photographs and readings with the purchase inquiry, together with the sheet. Then write the actual question in the covering message. “Please review the component at L03” is one possible request. “We are awaiting the site assessment” describes a different stage.

Use wording that represents the information you have, including anything still awaited.

When you send the inspection record, identify the relevant entry on the sheet and its photograph. If the technical team has supplied an assessment, attach that too and identify it as their assessment.

Our suggested message ends with the particular parts question and the names of any records still to come from the site.