New Holland T4020 Deluxe, T4020 Supersteer, T4030 Deluxe, T4030 Supersteer, T4040 Deluxe, T4040 Supersteer, T4050 Deluxe, T4050 Supersteer Tractor Service Manual (87666787B)

These T4020–T4050 Deluxe and SuperSteer tractors spend their lives on loaders, mowers, and field work where downtime hurts. This service manual is what I’d keep open on the bench when I’m chasing a steering pull on a SuperSteer front axle or sorting out a hydraulic hitch that won’t lift under load. It walks you through how to trace faults, strip components in a sensible order, and reassemble without guesswork, so you fix the problem once instead of throwing parts at it.

Applications & Use Cases

• Track down hydraulic issues like slow loader response by following step‑by‑step pressure and flow checks.
• Diagnose steering and SuperSteer problems, isolating whether it’s linkage, axle, or hydraulic control.
• Plan safe disassembly/assembly of driveline and front axle components so you don’t damage seals or bearings.
• Verify clutch and transmission operation with practical tests before you commit to splitting the tractor.
• Adjust linkages, pedals, and controls after repairs so everything engages smoothly and in the right sequence.

FAQ

Q: Can I use this manual on a laptop or tablet in the shop?

A: Yes, it’s well suited to digital use; you can zoom diagrams and use search to jump straight to the system you’re working on.

Q: Is it worth printing pages from this manual?

A: Definitely—most techs print the few procedures and schematics they need that day, mark notes on them, then replace if they get oily.

Safety Note

Always support the tractor and any raised implements securely before working underneath or opening hydraulic or driveline components.

New Holland T4020 Deluxe, T4020 Supersteer, T4030 Deluxe, T4030 Supersteer, T4040 Deluxe, T4040 Supersteer, T4050 Deluxe, T4050 Supersteer Tractor Index:

• CONTENT
• SECTION 00 — GENERAL
• SECTION 10 — ENGINE
• SECTION 18 — CLUTCH
• SECTION 21 — GEAR TRANSMISSION
• SECTION 23 — DRIVE LINES
• SECTION 25 — FRONT AXLE MECHANICAL TRANSMISSION
• SECTION 27 — REAR AXLE MECHANICAL TRANSMISSION
• SECTION 31 — MECHANICAL POWER TAKE–OFF
• SECTION 33 — BRAKING SYSTEM
• SECTION 35 — HYDRAULIC SYSTEMS
• SECTION 41 — STEERING
• SECTION 44 — AXLES AND WHEELS
• SECTION 50 — CAB AIR CONDITIONING SYSTEM
• SECTION 55 — ELECTRICAL SYSTEM
• SECTION 90 — CAB

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