New Holland T8020 - User Manual

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T8010/T8020/T8030/T8040 MASTER TABLE OF CONTENTS

NOTE: Engine repair information is not contained within this tractor Repair Manual. For engine repair, refer to

publication number 87515682 for the 8.3 & 9.0L 6 Cylinder, 24 Valve CNH Engine with High Pressure Common

Rail Fuel System.

STANDARD TORQUE SPECIFICATIONS ......................................................................SECTION 00, CHAPTER 1

TORQUE SPECIFICATIONS - METRIC HARDWARE ............................................................................... 00-1-4

TORQUE SPECIFICATIONS - STEEL HYDRAULIC FITTINGS ................................................................ 00-1-5

TORQUE SPECIFICATIONS - STEEL HYDRAULIC FITTINGS ................................................................ 00-1-6

SAFETY, GENERAL INFORMATION, MAINTENANCE SCHEDULE .............................SECTION 00, CHAPTER 2

SAFETY ...................................................................................................................................................... 00-2-3

GENERAL INFORMATION ......................................................................................................................... 00-2-5

LUBRICATION/MAINTENANCE CHART ................................................................................................... 00-2-6

SYSTEM CAPACITIES ............................................................................................................................... 00-2-7

ENGINE REMOVAL AND INSTALLATION ......................................................................SECTION 10, CHAPTER 1

ENGINE REMOVAL .................................................................................................................................... 10-1-3

ENGINE INSTALLATION .......................................................................................................................... 10-1-10

FUEL TANK / FUEL SENDER REMOVAL AND INSTALLATION....................................SECTION 10, CHAPTER 2

SPECIAL TORQUES .................................................................................................................................. 3001-3

FUEL TANK REMOVAL AND INSTALLATION .......................................................................................... 3001-3

FUEL LEVEL SENDER REMOVAL AND INSTALLATION........................................................................ 3001-10

HOOD REMOVAL ............................................................................................................SECTION 10, CHAPTER 3

HOOD REMOVAL ....................................................................................................................................... 10-3-3

HOOD INSTALLATION ............................................................................................................................... 10-3-5

COOLING SYSTEM MODULE REMOVAL AND INSTALLATION ...................................SECTION 10, CHAPTER 4

COOLING MODULE REMOVAL ................................................................................................................ 10-4-3

COOLING MODULE INSTALLATION ........................................................................................................ 10-4-7

VISCOUS FAN DRIVE TEST...........................................................................................SECTION 10, CHAPTER 5

REQUIRED TOOLS .................................................................................................................................... 10-5-3

DIAGNOSTIC PROCEDURE ...................................................................................................................... 10-5-4

FAN SPEED TEST ..................................................................................................................................... 10-5-7

POWERSHIFT TRANSMISSION SYSTEM -

HOW IT WORKS AND TROUBLESHOOTING ................................................................SECTION 21, CHAPTER 1

TRANSMISSION SYSTEM INTRODUCTION ............................................................................................ 21-1-3

TRANSMISSION SYSTEM CONTROLS .................................................................................................... 21-1-5

TRANSMISSION SYSTEM COMPONENTS .............................................................................................. 21-1-6

TRANSMISSION LUBE AND DISTRIBUTION TUBES .............................................................................. 21-1-8

POWERSHIFT TRANSMISSION CLUTCH LAYOUT ............................................................................... 21-1-10

POWERSHIFT VALVE CLUTCH ENGAGEMENTS ................................................................................. 21-1-11

POWER FLOW (FORWARD SPEEDS) ................................................................................................... 21-1-12

POWER FLOW (REVERSE SPEEDS) ..................................................................................................... 21-1-30

POWER FLOW (FORWARD CREEPER DRIVE SPEEDS) ..................................................................... 21-1-34

POWER FLOW (REVERSE CREEPER DRIVE SPEEDS) ...................................................................... 21-1-40

INCHING VALVE OPERATION ................................................................................................................ 21-1-42

INSTRUMENTATION CLUSTER - TRANSMISSION LEAKAGE CHECK ................................................ 21-1-46

MASTER CLUTCH PRESSURE CHECK ................................................................................................. 21-1-49

FRONT FRAME TO SPEED TRANSMISSION SPLIT .....................................................SECTION 21, CHAPTER 2

SPECIAL TOOLS ........................................................................................................................................ 21-2-3

SPECIAL TORQUES .................................................................................................................................. 21-2-3

FRONT FRAME TO SPEED TRANSMISSION SPLIT ............................................................................... 21-2-4

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Questions and Answers

G
Gloria ThorntonAug 8, 2025
What to do if my New Holland T8020 Tractor moves in reverse when in 5th, 6th, 11th, or 12th gear?
- A
  Amanda ButlerAug 9, 2025
  If your New Holland Tractor moves in reverse when you shift into 5th, 6th, 11th, or 12th gear, it indicates that the Reverse/5th clutch hub is installed backward on the shaft. The solution is to reinstall the Reverse/5th clutch hub correctly on the shaft.
T
tylerbrendaAug 21, 2025
Why are odd gears even and even gears odd on my New Holland T8020?
- M
  mannshaneAug 21, 2025
  If the odd gears on your New Holland Tractor are behaving like even gears, and vice versa, it's likely that the odd/even clutch pack was installed backward. To resolve this, you should reinstall the odd/even clutch pack correctly.