When submitting a warranty claim for a roll forming machine, one of the biggest frustrations buyers face is this:
“Please provide more evidence.”
Claims often stall — not because the defect is invalid — but because the manufacturer does not have sufficient proof to approve responsibility.
Overseas suppliers in particular require structured, technical documentation before:
Approving replacement parts
Dispatching engineers
Covering freight
Authorizing repairs
Accepting liability
This guide explains:
What manufacturers typically require
Why they require it
How to present it properly
What causes claim rejection
How to increase approval speed
In international machinery disputes, the strength of your evidence determines your leverage.
Manufacturers must determine:
Was the defect caused during production?
Was the machine installed correctly?
Was material within specification?
Was the machine operated within rated limits?
Did transport cause damage?
Has unauthorized modification occurred?
Without evidence, they cannot distinguish between:
Manufacturing fault
Installation error
Operator misuse
Material deviation
Freight damage
Evidence protects both parties — but it must be complete.
Manufacturers will always request:
Machine model number
Serial number
Contract reference
Date of shipment
FAT (Factory Acceptance Test) date
SAT (Site Acceptance Test) date
Warranty start date
If serial number missing, claim may not proceed.
Always include nameplate photos.
Manufacturers require precise, technical fault descriptions.
Not:
“Machine not working.”
But:
Exact alarm code (verbatim)
Operating speed at time of failure
Material specification
Section of machine affected
Frequency of issue
Example:
Servo alarm F02 triggered at 32 m/min while running 0.5 mm G450 material. Alarm repeats after reset.
Precision speeds approval.
Manufacturers expect:
Wide view of machine section
Close-up of failed component
Measurement tool visible in image
Serial plate confirmation
Surrounding structure context
Photos should be:
Clear
Well-lit
Taken before disassembly
Poor photo quality delays claim.
For issues involving:
Vibration
Noise
Punch misalignment
Surface marking
Panel distortion
Hydraulic leakage
Video helps manufacturers:
Observe real-time operation
Confirm load condition
Verify material feed
Identify mechanical behavior
Video significantly reduces back-and-forth.
Manufacturers often require actual measurement data.
For example:
Shaft runout measured with dial indicator
Cover width deviation measured with caliper
Punch hole offset measured against drawing
Hydraulic pressure reading at pump
Provide:
Measured value
Contract specification
Tolerance allowed
Evidence must be quantitative, not subjective.
Many claims are rejected due to material issues.
Manufacturers may request:
Thickness confirmation
Yield strength
Tensile strength
Coating type
Coil width
Mill Test Certificate (MTC) is highly recommended.
If material exceeds rated specification, warranty may be denied.
Manufacturers will often ask:
Was installation supervised?
Is leveling documented?
Was machine anchored correctly?
Was electrical supply verified?
Was hydraulic oil type correct?
Provide:
Commissioning checklist
Electrical supply readings
Leveling measurements
Signed SAT report
Installation errors are one of the most common reasons for rejection.
For electrical or servo failures, manufacturers may request:
Voltage readings
Phase balance
Frequency
Earthing confirmation
Surge protection status
Unstable power supply often voids coverage.
Document power conditions clearly.
Manufacturers will review:
Date of installation
Date of first operation
Date of first fault
Steps taken before reporting
Date of warranty notification
Claims outside warranty period are often rejected automatically.
Timeline clarity matters.
Manufacturers may require:
Return of defective part
Serial number verification
Internal inspection
Do not discard failed components before authorization.
Physical evidence strengthens claim significantly.
Buyer reported:
“Bearing failure at 8 months.”
Initial claim rejected due to:
No installation leveling proof
No shaft alignment measurement
No photo evidence before disassembly
After resubmission with:
Dial indicator readings
Installation records
Material spec confirmation
Failure timeline
Warranty replacement approved.
Evidence quality changed outcome.
Second case:
Punch misalignment claim.
Buyer provided:
Measurement photos
Video under load
Contract drawing reference
Manufacturer approved correction immediately.
Clear documentation accelerates resolution.
If documentation incomplete, manufacturer must:
Request additional photos
Ask for measurement clarification
Confirm material specification
Review internal engineering notes
Each request adds:
24–48 hours per cycle (especially overseas)
Time zone delays
Frustration
Strong initial submission prevents delay.
Using vague language
No serial number photo
No measurement data
Disassembling before documentation
Not verifying material specification
Failing to document electrical supply
Emotional communication instead of technical
Avoid these errors.
If dispute escalates:
Arbitration panel reviews documentation
Legal teams analyze evidence
Expert witnesses assess measurement records
Strong documentation:
Improves credibility
Reduces dispute duration
Increases settlement likelihood
Poor documentation weakens legal standing.
Every roll forming operation should maintain:
Fault report template
Photo documentation checklist
Video recording procedure
Measurement log sheet
Installation archive
Material certification file
Preparation reduces future conflict.
Clear measurements and contract reference comparison.
Yes — especially for mechanical and operational issues.
Always — it confirms machine identity and warranty eligibility.
Yes — lack of evidence weakens claim.
Absolutely — physical inspection may be required.
Yes — strong evidence reduces back-and-forth communication.
Manufacturers require structured, measurable evidence before approving warranty claims.
Without it:
Claims stall
Responsibility becomes disputed
Approval delayed
Enforcement weakened
With:
Serial confirmation
Clear fault description
Photos & video
Measured tolerances
Material documentation
Installation verification
You dramatically increase approval speed and strengthen your legal position.
In overseas roll forming machine disputes, documentation is not optional — it is your strongest asset.
Before the next failure occurs, implement a formal evidence collection procedure.
Because in warranty disputes, the party with the best documentation usually wins.
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