HeavyEquipmentFix
Ask

Diagnose, spec, and decode heavy equipment.

One clear sentence. Include the machine and the code or symptom.

What happened, when it started, and what you already checked.

You get an instant AI answer, then the community adds to it.

How every answer is built

Step 1

Search the database

Looks up your code across 650,000+ SAE J1939/FMI and OEM records for a direct match.

650k+ codes · J1939 / FMI · OEM

Step 2

Search trusted sites

When the database does not cover it, it searches manufacturer manuals, service bulletins, and trade sources on a curated whitelist.

OEM manuals · bulletins · forums

Step 3

Cross-check and cite

Reads the sources, cross-checks the details, and answers in plain English with citations and a verify note.

cited · verify-against-manual

The toolbox

12 free tools - no login, works in the browser, and every result hands off to the AI assistant.

All tools
Diagnostics
Fault Code Lookup
Look up SAE J1939, FMI, and OEM fault codes with first checks.
Decoders
Serial / PIN / VIN Decoder
Read a machine PIN or VIN structure with verified manufacturer details.
Calculators
Hydraulic Calculator
Calculate cylinder force, oil flow, and pump size.
Calculators
Bucket & Payload Calculator
Convert bucket volume, density, and fill factor into payload weight.
Calculators
Fuel Consumption & Cost
Estimate diesel consumption and operating cost.
Calculators
Ground Pressure Calculator
Calculate track ground bearing pressure and compare shoe sizes.
Calculators
Undercarriage Wear Calculator
Estimate percent life remaining from undercarriage measurements.
Calculators
Crane Outrigger Pad Calculator
Size outrigger pads from load and allowable ground pressure.
Reference
Bolt Torque Reference
Reference standard SAE and metric bolt tightening torque.
Reference
Hydraulic Fitting Identifier
Identify SAE, BSP, JIS, and DIN hydraulic threads.
Reference
US Transport Permit Pre-check
Pre-check load dimensions, axle loads, and Bridge Formula weight.
Reference
Maintenance Schedule Generator
Generate standard service intervals from machine hours.

From the forum

Every question gets an instant grounded AI answer, then field-tested help from people who run the same iron.

Open the forum

NH WORKMASTER 70 code 3818

Fault Codes & Diagnostics· New holland· AI answered

1 answer

Toyota 2SDK8 hydraulic hose and connector sizes?

Hydraulics· Toyota· AI answered

1 answer

On a Deere excavator 270D LC Do I need to bleed the Hydraulic pump if I drain the hydraulic tank?

Maintenance & Fluids· John Deere· AI answered

1 answer

Toyota Skidsteer 2SDK8 12301 pins and bushing specifications

Maintenance & Fluids· Toyota· AI answered

1 answer

John deere 6200se fwd reverse safety switch

Electrical & Sensors· John deere· AI answered

1 answer

Grounded, not guessed

Every answer shows its sources.

A plain chatbot leans on stale training data and guesses when it runs out. Here is how HeavyEquipmentFix answers instead.

650,000+ codes

It checks a fault-code database for a direct match before anything else.

Live sources

For the rest it searches current manufacturer and trade sources.

Cited claims

Every spec or code links back to where it came from, so you can check it.

Flagged estimates

Safety-critical figures carry a verify-against-your-manual note.

HeavyEquipmentFix

> ▍

  • Scanning the fault-code databaseMatching against 650,000+ code records
  • Checking trusted sourcesManufacturer manuals, service bulletins, technician forums
  • Cross-checking the findingsComparing sources so the answer holds up
  • Grounding and safety checkVerifying before it answers