New Holland TX Series TX36, TX66, TX68 Combine Pdf Repair Service Manual (p. Nb. 40483610)

New Holland TX Series TX36, TX66, TX68 Combine PDF Repair Service Manual (Publication No. 40483610)

Ask any harvest mechanic what usually stops a high-capacity combine in the middle of wheat season, and the answer is rarely the engine. More often it's a worn threshing mechanism, an overloaded straw walker, a hydrostatic drive issue, or an incorrectly adjusted cleaning system that slowly steals grain from every acre. The New Holland TX36, TX66 and TX68 Combines were engineered to harvest large cereal crops efficiently, but only when every rotating assembly, drive system and separator is working within factory tolerances. That's exactly where this OEM Factory Repair Service Manual becomes invaluable.

Unlike simplified repair guides, Publication No. 40483610 was produced for dealership workshops and follows the original New Holland repair sequence. It provides complete workshop coverage for the TX36 and mechanical repair information for the TX66 and TX68, covering everything from traction systems to threshing adjustments, straw separation, grain cleaning and electrical diagnostics. :contentReference[oaicite:0]{index=0}

Designed for High-Output Grain Harvesting

The TX Series represented one of New Holland's most productive conventional combine platforms of its era. Instead of relying on rotary separation, these machines used a proven large-diameter threshing drum combined with multiple straw walkers, allowing excellent grain separation while maintaining straw quality for baling. Their generous grain tank capacity, hydrostatic ground drive and wide header compatibility made them popular on medium and large cereal farms harvesting wheat, barley, oats, rye and oilseed crops. Even after decades of service, many TX combines remain in seasonal operation because their mechanical design can be restored with accurate workshop information rather than expensive component replacement.

Machine Information

A Manual Written for Real Harvest Breakdowns

When a TX combine enters the workshop, repairs often involve far more than replacing a failed bearing. Correct drum-to-concave clearance, straw walker timing, hydrostatic pressure checks and cleaning shoe calibration all affect harvesting performance. This manual explains these procedures in the same sequence followed by New Holland technicians, helping reduce grain losses after repairs instead of simply restoring machine movement.

• Correct uneven grain separation after replacing threshing components.
• Inspect hydrostatic transmission performance before harvest begins.
• Repair straw chopper clutch assemblies after heavy seasonal operation.
• Synchronize cleaning shoe mechanisms to improve sample quality.
• Diagnose electrical faults affecting harvesting controls and warning systems.
• Restore grain elevator operation following chain or sprocket wear.
• Adjust header systems after driveline servicing.
• Use factory tolerances to inspect worn bearings, shafts and rotating assemblies.
• Verify hydraulic performance before replacing expensive pumps.
• Carry out post-repair functional adjustments to maintain factory harvesting efficiency.

Factory Repair Sections Included

Manual Specifications

Frequently Asked Questions

Does this manual explain how to restore harvesting performance after excessive grain loss?

Yes. It includes factory adjustment procedures for the threshing cylinder, separation system and cleaning shoe, helping technicians identify the mechanical causes of grain loss rather than relying on trial-and-error adjustments.

Will it help when rebuilding a TX36 after years of heavy harvesting?

Absolutely. The TX36 section provides comprehensive workshop information covering major mechanical systems, inspection procedures, adjustment values and factory repair sequences.

Why is the TX66 and TX68 coverage different from the TX36?

This publication follows the original New Holland workshop structure. It provides complete repair information for the TX36, while the TX66 and TX68 sections focus on mechanical repair procedures supplied by the manufacturer.

Is this manual useful for off-season preventive overhauls?

Yes. Many workshops use it during winter servicing to inspect hydrostatic components, threshing assemblies, straw walkers and cleaning systems before the next harvesting season begins.

Who benefits most from owning this factory manual?

It's an excellent resource for independent agricultural workshops, fleet maintenance departments, restoration enthusiasts and farm owners who continue operating TX Series combines and want repairs performed to original factory standards.