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OEM-EVIDENCED CLASS DOSSIER

Tractor Technical Dossier: Powertrain, PTO, Hydraulics and Implement Network

A class dossier connecting OEM-primary tractor applications with engine, transmission, PTO/hydraulic and implement-network diagnostics.

Verified model applications

Cards open only existing model pages that pass the bilingual OEM-primary publication gate.

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OEM-evidenced applicationJohn Deere 6155R

John Deere’s official operator manual covers 6145R, 6155R, 6155RH, 6175R, 6195R and 6215R in the same document family.

→OEM-evidenced applicationCase IH Puma

Case IH lists the current U.S. Puma family from 150 to 240 hp and explicitly separates PowerDrive powershift and CVXDrive continuously variable transmission options.

→OEM-evidenced applicationNew Holland T7

New Holland lists ECOBlue HI-eSCR 2 NEF engines and a 195-270 hp product range on the T7 LWB Stage V page.

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System architecture

  • Engine/ECU, transmission control, PTO, hitch/SCV hydraulics and ISOBUS/implement network are separate but interacting functional chains.
  • Engine derate or aftertreatment protection can feel like hydraulic/PTO performance loss; capture active DTC/derate state before load testing.
  • Transmission and hydraulic temperature/oil condition can create shared symptoms on some platforms; do not condemn one system until model-specific architecture is verified.

Symptom → diagnostic branch

  • PTO no-engage: interlock/command → engine RPM/load → PTO control → mechanical output.
  • Slow hydraulics: oil level/temperature → pump/load-sense demand → SCV command → actual flow/function speed.
  • Traction/shift issue: installed transmission family → commanded ratio/gear → actual speed/shaft response → mechanical/electronic separation.

Measurement strategy

  • Do not use exact service thresholds until machine/VIN/serial, engine and transmission identity are recorded.
  • Compare command and actual response on the same timeline under the same load, temperature and implement condition.
  • For pressure/flow or calibration, use only the test point and acceptance limit in the model-specific OEM service procedure.

Primary evidence sources

  1. John Deere 6145R/6155R/6155RH/6175R/6195R/6215R operator manual · OEM-primary · 2026-08-15
  2. John Deere 6155R transmission/hydraulic oil-level procedure · OEM-primary · 2026-08-15
  3. John Deere 6145R/6155R PTO power output section · OEM-primary · 2026-08-15
  4. Case IH Puma Series 150-240 HP tractors · OEM-primary · 2026-08-15
  5. Case IH Puma 185-240 tractors · OEM-primary · 2026-08-15
  6. New Holland T7 LWB Stage V tractor · OEM-primary · 2026-08-15
  7. New Holland T7 Heavy Duty with PLM Intelligence · OEM-primary · 2026-08-15