Parts Substitution Card Template

This template is for a one-page bench card that tells a technician which known-good external part, wear item, or kit to swap first before deeper internal repair.

How to Use This Card

Use this after the model is identified and the complaint branch is narrowed down.
Stage only the highest-value known-good parts first.
If the complaint follows the swapped external part, stop there.
If the complaint stays with the machine after the listed substitutions, move into the full guide.

Use This Card When

the machine still could be wrong because of a torch, gun, pedal, clamp, regulator, front-end stack, or fitted kit
a quick substitution is safer and faster than internal repair
the complaint is already narrowed to one process or subsystem

Stage First

known-good part or assembly 1
known-good part or assembly 2
any required consumables or cables

Fast Substitution Card

Complaint branch	Swap first	If the complaint follows the part...	If the complaint stays with the machine...
named branch	exact part, kit, or assembly	keep diagnosis external and close the part path	move to the next branch or the full guide

Stop Rules

Stop if the complaint disappears with the known-good external part or fitted package.
Stop if the wrong kit, wrong polarity, wrong front-end stack, or wrong accessory family explains the issue completely.
Stop using the card and open the full guide if the complaint does not stay aligned to one clear external branch.

Open Next

full model guide
parts-and-kit triage
local reference manifest