Ask what the capacity number actually describes
A "5-ton wrecker" is not a complete specification. Before comparing two offers, ask whether the number describes the deck, the winch, a supported axle or a towing limit. Record the unit and the condition attached to it. Do not convert an ambiguous ton label into a metric rating.
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| Rating | Request with the number | Do not infer |
|---|---|---|
| Deck load | Permitted carried mass, distribution and usable deck dimensions | That the chassis has the same remaining payload |
| Winch line pull | Winch identity, rope specification, rope layer and stated pulling conditions | An equivalent deck, lifting or towing capacity |
| Underlift or wheel lift | Supported load at the stated reach, attachment and operating condition | The same capacity at every extension |
| Towed load | Manufacturer towing limit and the associated vehicle, braking and attachment conditions | That lifting one axle approves the whole towing operation |
Check axle loads, not just gross mass
Compare the proposed loading position with the completed vehicle’s front and rear axle limits. Being below the gross vehicle mass limit does not by itself demonstrate acceptable distribution. Miller’s load-placement instructions require axle weights to stay within chassis axle ratings; its specification section warns against assuming every chassis can use the carrier’s full structural rating. Miller Industries Century G2 Series 10 manual, August 2025
For the purchase review, request the wheelbase, rear overhang, body position, empty axle weights and representative loaded axle weights on one drawing revision. The KEEYAK inspection template calls for both empty and representative loaded checks. Use the selected chassis and tyre limits, not a generic brand range. KEEYAK Technical Data Sheet, Rev 1.0 KEEYAK Inspection Checklist, Rev 1.0
Compare offers at the same working position
Give both suppliers the same target-vehicle schedule and ask them to mark the supported load, attachment and reach on their drawings. Leave a row unresolved if a supplier returns only a headline capacity. A smaller, fully documented figure is more useful for a purchasing decision than a larger figure with no operating condition.
A load test, an equipment rating and legal road permission answer different questions. Do not replace the manufacturer’s operating limits with a test load, or use a foreign manual to declare destination compliance. No KEEYAK model capacity or local approval is established by this guide.
- Use one unit system and define what each mass or force value represents.
- Compare like-for-like reach, load position and equipment configuration.
- Ask the responsible engineer to resolve the controlling limit.
- Do not accept or operate the configuration while the load path or attachment remains unresolved.
Match each capacity figure to its equipment record
The Jerr-Dan 15-ton steel carrier specification identifies a particular model. Follow that distinction when comparing capacity documents: the deck, winch and underlift records must identify the equipment actually offered. The Jerr-Dan rating does not apply to a KEEYAK flatbed. Jerr-Dan 15-ton steel carrier specification
Scroll horizontally to view all columns.
| Duty | Document to compare | Acceptance boundary |
|---|---|---|
| Carrying | Deck dimensions, loading angle and rated deck load | Confirm target wheelbase, clearance, restraints and completed axle loads. |
| Pulling | Installed winch identity and line-pull conditions | A winch pull rating is not a carried payload or towing rating. |
| Towing | Underlift chart, extension and attachment limits | Check the supported axle, towed mass, chassis and target vehicle instructions separately. |
Sources and applicability
PDF links appear only when public downloads are enabled. These worksheets do not replace model-specific documents.
Procurement questions, not a supply commitment. Sections 4 to 6 cover chassis and body integration; section 9 covers commercial terms; module 11A covers wreckers.
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Miller Series 10 only, sections II and 3.6. Not KEEYAK ratings, parts, maintenance intervals or warranty.
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Model-neutral procurement worksheet, 17 July 2026. Its chassis, mass, equipment and document fields help define a completed schedule. It is not an exact-model datasheet or an approved capacity.
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Blank inspection framework. Sections 2, 4, 10A and 11 cover identity, axle weighing, wrecker tests and handover documents. A completed, signed record is still required.
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Named carrier model reference showing separately defined equipment specifications; no KEEYAK availability or rating claim.
Document date:
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