New Holland 18HB, 21HB, 25HB, 30HB, 36HB Draper Headers Pdf Repair Service Manual (p. Nb. 84157369)

New Holland 18HB, 21HB, 25HB, 30HB, 36HB Draper Headers PDF Repair Service Manual (Publication No. 84157369)

Maximum combine productivity begins at the header. The New Holland 18HB, 21HB, 25HB, 30HB and 36HB Draper Headers were engineered to deliver smooth crop feeding, clean cutting performance and consistent material flow across a wide range of harvesting conditions. Featuring a center-feed draper belt system, flexible cutterbar design and hydraulically controlled reel, these HB Series headers help minimize crop loss while maintaining steady feeding into the combine. This workshop manual provides the detailed repair information required to keep every major header component operating at peak performance.

This OEM Factory Repair Service Manual (Publication No. 84157369) includes dealership-level procedures for inspection, troubleshooting, testing, adjustment and complete overhaul of the draper header. Whether repairing the cutterbar drive, replacing draper belts, servicing hydraulic reel functions or rebuilding drive components, every procedure follows official New Holland workshop standards.

Designed for High-Efficiency Grain Harvesting

The HB Series Draper Headers were developed to improve crop handling in cereals, oilseed crops and pulse crops by transporting material smoothly from both sides toward the center feed opening. Their flexible cutting platform follows uneven ground closely while the synchronized draper belts maintain a continuous crop flow into the feeder housing. The result is improved harvesting efficiency, reduced shatter loss and consistent combine performance even in heavy crop conditions.

Machine Information

Factory Workshop Coverage

Professional Workshop Procedures

• Replace worn draper belts and align center-feed conveyors.
• Adjust cutterbar knife timing and cutting performance.
• Repair hydraulic reel lift and fore-aft positioning systems.
• Inspect reel bearings, tine bars and drive assemblies.
• Service gearboxes, chain drives and shaft assemblies.
• Diagnose hydraulic flow and operating pressure problems.
• Repair flexible cutterbar suspension components.
• Replace bearings, seals and wear components.
• Use exploded diagrams during complete component rebuilding.
• Apply factory torque specifications throughout repairs.
• Perform complete operational testing after servicing.
• Verify smooth crop feeding and uniform header performance before returning the machine to the field.

Manual Specifications

Frequently Asked Questions

Which header models are covered by this repair manual?

This OEM workshop manual covers the New Holland 18HB, 21HB, 25HB, 30HB and 36HB Draper Headers (Publication No. 84157369).

Does the manual include draper belt and cutterbar repairs?

Yes. It includes complete procedures for servicing draper belts, cutterbar assemblies, knife drives, reel systems and hydraulic components.

Are hydraulic and electrical systems included?

Yes. Hydraulic circuit diagnostics, component testing, electrical troubleshooting and related service procedures are included where applicable.

Does the manual contain exploded diagrams and factory specifications?

Yes. The manual provides exploded component illustrations, hydraulic schematics, torque specifications, service limits and detailed repair instructions.

Who should use this workshop manual?

This manual is intended for New Holland dealership technicians, agricultural equipment workshops, combine owners and experienced mechanics servicing HB Series Draper Headers.