Pre-purchase inspection of used equipment catches problems before they cost you. A $500 to $1,500 inspection on a $100,000 to $500,000 piece of equipment is cheap insurance. This guide covers what to inspect, who can do it, and what to do with findings.
Why inspections matter
Used equipment can hide:
- Major mechanical issues requiring expensive repair
- Frame damage from accidents
- Hour meter rollback or odometer fraud
- Worn-out major components masquerading as functional
- Pending maintenance the seller did not mention
- Modifications that affect safety or insurability
The cost of finding a $20,000 problem during inspection vs after purchase is the inspection fee plus walkaway flexibility.
Who can inspect
| Inspector type | Cost | Best for |
|---|---|---|
| OEM dealer | $300-$1,000 | Brand-specific equipment; covered by warranty |
| Independent mechanic | $200-$600 | General mechanical condition |
| Certified equipment appraiser | $500-$2,500 | Higher-value equipment; value supports financing |
| Industry specialist | $500-$2,000 | Specialty equipment (medical, CNC, marine) |
| Pre-purchase inspection service | $300-$1,500 | Mobile inspection; trucks especially |
Universal inspection items
For most equipment:
1. Serial number and hour meter / odometer verification
- Verify serial matches title and purchase paperwork
- Photograph hour meter or odometer reading
- Cross-check ECU-stored hours against displayed reading
- Compare against service records
2. Visual exterior
- Frame condition: cracks, welds, repairs
- Paint condition (over-spray suggests body work)
- Sheet metal, panel alignment, door fit
- Glass condition (cracks, replacements)
- Lighting (all functional)
- Tires or tracks: tread depth, even wear, no cuts/cracks
3. Fluid checks
- Engine oil: color, level, smell, metal flakes
- Coolant: color, no oil mixed in
- Hydraulic fluid: color, no foaming, no contaminants
- Transmission fluid: color, smell
- Final drives, swing motors (heavy equipment): metal in fluid signals wear
4. Engine start and idle
- Cold start: should start within 5-10 seconds
- Smoke at startup: blue (oil burning), white (coolant), black (fuel)
- Idle quality: smooth or rough
- Vibration at idle
- Unusual noises (ticking, knocking, whining)
5. Operational function test
- All controls function smoothly
- Hydraulics extend and retract without binding
- Boom, bucket, attachments operate as designed
- Steering responsive
- Brakes hold and release properly
- Backup alarm, lights, horn all work
6. Underneath
- Frame rails: rust, cracks, repairs
- Leaks (oil, fuel, coolant, hydraulic)
- Worn bushings, pins, joints
- Exhaust system condition
Equipment-specific items
Excavators
- Track condition (pads, links, sprockets)
- Pin and bushing wear at boom and bucket joints
- Hydraulic cylinder rod condition (no pitting or scoring)
- Swing motor noise during 360-degree rotation
- Final drive condition
- Cab condition (seats, controls, HVAC)
Dozers and loaders
- Blade or bucket cutting edge wear
- Push frame condition
- Pivot points and pins
- Final drives and steering clutches
Class 8 trucks
- Engine: compression test, blow-by test
- Transmission: shift quality, clutch wear
- Differential: noise, leaks
- Suspension: air bags, springs, alignment
- Brakes: drum/disc condition, slack adjuster operation
- Air system: leaks, dryer condition
- Fifth wheel: lock, plate condition, jaw wear
- DEF and aftertreatment system (if applicable)
CNC machines
- Spindle hours and runout
- Way condition (linear bearings, ball screws)
- Control system functionality (run a test program)
- Coolant system condition
- Tool changer operation
- Backlash measurement on each axis
Restaurant equipment
- Refrigeration: temperature hold, compressor sound, refrigerant level
- Cooking equipment: heating elements, burners, oven calibration
- Ventilation: hood operation, fan condition
- Plumbing fixtures: function, leaks
Documentation to request from seller
- Service records (full history)
- Maintenance schedule adherence
- Repair invoices from past 3 years
- Manufacturer warranty status
- Original purchase documentation
- Operator log books (hours, miles, operating conditions)
- Any modifications or aftermarket additions documented
Common findings and what they mean
| Finding | Implication |
|---|---|
| Blue smoke at startup | Oil burning; cylinder/valve wear; potentially $5K-$15K rebuild |
| Coolant in oil | Head gasket; potentially $3K-$8K repair |
| Metal in transmission fluid | Internal wear; rebuild likely $5K-$15K |
| Hydraulic cylinder pitting | Seals leaking; rebuild needed; $1K-$5K per cylinder |
| Frame crack | Major structural concern; affects safety and resale; walkaway |
| Hour meter discrepancy with ECU | Possible rollback; verify before purchase |
| Recent paint over old damage | Body work attempting to hide damage; investigate |
| Worn tire tread | $5K-$15K for truck tires; budget accordingly |
The inspection report
A good inspection report includes:
- Equipment identification (make, model, year, serial, hours)
- Date and location of inspection
- Inspector credentials
- Photo documentation of all major components
- Identified issues categorized as: cosmetic, deferred maintenance, immediate concern, critical
- Estimated repair costs for each issue
- Overall condition rating
- Recommendation (proceed, negotiate, walk away)
Using findings to negotiate
If the inspection reveals issues:
- Estimate repair costs for each item
- Calculate total cost of issues identified
- Negotiate price reduction or seller-covered repairs
- If issues are severe, walk away
Typical negotiation: ask seller to either reduce price by 80%-100% of inspection-identified repair cost or perform the repairs before purchase.
When the seller refuses inspection
If a seller refuses to allow inspection or requires you to buy without inspection, walk away. Legitimate sellers welcome inspection of higher-value equipment.
Exceptions:
- Auction purchases (inspection done before bidding, not after)
- Very low-value equipment where inspection cost exceeds equipment cost
- Dealer-stocked equipment with established inspection records
Inspection vs warranty
Inspection is one-time, pre-purchase. Warranty is ongoing post-purchase. They serve different purposes:
- Inspection identifies known issues at purchase time
- Warranty covers unknown issues that arise during the warranty period
For older equipment without warranty coverage, inspection is critical.
Cost-benefit example
$200,000 used excavator. Pre-purchase inspection cost: $800.
Inspection identifies hydraulic pump showing wear, estimated $8,000 to replace within 6 months.
You negotiate $8,000 off the purchase price or seller-replaces the pump pre-purchase.
Net benefit: $7,200 ($8,000 saved minus $800 inspection).
On larger equipment or older machines, the math is even more favorable.
Action steps
- For any used equipment over $25,000, schedule pre-purchase inspection
- Identify a qualified inspector before you commit to a specific unit
- Request service records and maintenance documentation from seller
- Plan inspection 1-2 weeks before your target close date
- Use findings to negotiate price, repairs, or walk away
- Keep the inspection report permanently (useful for future sale and warranty disputes)
