The PTO Dynamometer Built for the Field — Not Just the Shop
PRUFSTAND® is the only 100% independent PTO dynamometer on the market. No power supply. No water. No hydraulic fluid. Test tractors, combines, and harvesters right where they work — on the farm, in the field, or at your dealership.
Most PTO Dynos Haven't Changed Since the 1960s.
Water brake dynamometers are expensive to run, tied to a power supply, and require you to bring the equipment to them — not the other way around. That means transport costs, lost field time, and diagnostic delays that cost your customers money. PRUFSTAND® was engineered from the ground up to change all of that.
Why PRUFSTAND® Is Different
100% Independent
Requires no external power, no water supply, and no hydraulic fluid. Hook up and test anywhere — in the field, at a branch, or on a remote farm. Nothing else on the market does this.
Test Up to 2400HP
The A400 tests up to 400HP. The A800 tests up to 800HP. Link units together with our exclusive DYNOLink® system to test up to 2400HP — far beyond any competitor.
Exclusive DYNOLink® Technology
Only from PRUFSTAND®. Connect multiple units to test higher HP equipment and share dyno resources across your dealer branches. One investment, maximum flexibility.
Safety-First Engineering
E-Stop button, automatic overheating shutdown, locking safety doors, trailer stabilizers, and German-made Walterscheid® PTO shafts. Built to protect your team every time.
Choose Your PRUFSTAND® Model
PRUFSTAND® A400
Tests from 10HP to 400HP. Available as a trailer unit or adapted to fit a service vehicle. The everyday workhorse for most dealerships. DYNOLink® compatible.
- 10HP – 400HP range
- Trailer or service vehicle mount
- DYNOLink® compatible
- Air-cooled, fully self-contained
PRUFSTAND® A800
Tests up to 800HP. Ideal for large-scale equipment testing. DYNOLink® compatible for configurations up to 2400HP.
- Up to 800HP range
- Trailer or service vehicle mount
- DYNOLink® compatible
- Multi-unit configurations up to 2400HP
DYNOLink® Configurations
| Configuration | Max Power | Max Torque |
|---|---|---|
| A400 + A400 | 800HP | 4,400 lb-ft |
| A400 + A800 | 1,200HP | 6,600 lb-ft |
| A800 + A800 | 1,600HP | 8,800 lb-ft |
| A800 + A800 + A400 | 2,000HP+ | Maximum Flexibility |
What Can You Use PRUFSTAND® For?
Every one of these use cases represents a billable service opportunity for your dealership or service operation.
Pre-Delivery Inspections
Give customers a documented power report before they drive off the lot. No two tractors are the same.
Trade-In Assessments
Know the real condition of any trade-in before settling on a price. Avoid costly surprises.
Field Fault Diagnostics
Diagnose issues right where the equipment works — no expensive transport, no downtime delays.
Forced DPF Regeneration
Place the engine under load to complete a DPF regen cycle when passive regeneration is no longer possible.
Engine Deglazing
Save your customer an $8,000+ rebuild with a $600–$800 dyno session. Run the engine under load for 2–4 hours and bring it back to life.
New Machine Run-In
Confirm correct run-in under load before delivery. Catch leaks and issues before they become on-farm calls.
PRUFSTAND® Is a Revenue Line, Not Just a Tool
Dealerships that invest in PRUFSTAND® actively bill for testing sessions, use it to protect trade-in valuations, and eliminate non-chargeable on-farm service calls. Your sales team can sell a documented power report the same way they'd sell any premium accessory. It's not an expense — it's a semi-regular revenue stream.
Talk to Us About Dealer PricingFrequently Asked Questions
Ready to Replace Your Old Water Brake Dyno?
Talk to our team about which PRUFSTAND® model is right for your dealership or service operation.
Contact STEINBAUER USA