New Holland 1400, 1500 Combines Pdf Repair Service Manual (p. Nb. 40481300)

New Holland 1400, 1500 Combines PDF Repair Service Manual (Publication No. 40481300)

One of the quickest ways to lose grain during harvest is operating a combine that "still works" but is no longer properly adjusted. A slightly worn concave, an out-of-spec straw walker crank, or a misaligned cleaning shoe can quietly reduce harvesting efficiency long before a major failure occurs. The New Holland 1400 and 1500 Combines were designed around a dependable conventional threshing system, where every shaft, bearing and drive mechanism plays a direct role in crop quality. This OEM Factory Repair Service Manual is built for mechanics who want to restore those systems to factory performance—not simply replace parts until the machine runs again.

Publication No. 40481300 follows the original New Holland workshop format and guides technicians through complete repairs of the cylinder, concave, grain handling, transmission, hydraulic and electrical systems. It is especially valuable for maintaining older combines that continue to harvest wheat, oats, barley and similar cereal crops, where accurate mechanical adjustment has a greater impact than electronic calibration. The manual also includes factory wiring diagrams, troubleshooting procedures and dedicated repair sections for every major harvesting assembly.

Why the 1400 & 1500 Continue Working Decades Later

Many operators keep these combines in service because of their practical mechanical layout and straightforward field repairs. Their conventional threshing cylinder, straw walker separation system and mechanically driven grain handling components can often be rebuilt instead of replaced, making them economical machines for mixed farms and seasonal harvesting. When serviced using factory tolerances, these combines continue delivering dependable harvesting performance without the complexity of modern electronic systems.

Machine Information

Inside This Factory Workshop Manual

Unlike generic repair books that summarize procedures, this manual separates the combine into individual service groups so technicians can diagnose wear in the exact harvesting stage where performance is being lost. Factory repair sections include:

• Cylinder and concave servicing to restore correct threshing clearance and crop flow.
• Cleaning shoe and eccentric drive inspection for improved grain sample quality.
• Variable ground speed drive adjustments after transmission or clutch repairs.
• Grain and tailings elevator rebuilding to eliminate feeding interruptions.
• Hydraulic troubleshooting using factory testing procedures instead of component swapping.
• Electrical fault diagnosis with original wiring diagrams and circuit references.
• Brake and parking brake repairs for reliable field and transport operation.
• Engine-area servicing with factory specifications and adjustment data.
• Steering and rear axle inspection to maintain safe maneuverability during harvest.
• Special service tool references that simplify complex workshop procedures.

Repair Coverage Included

Manual Specifications

Frequently Asked Questions

Does this manual explain how to correct poor threshing performance instead of simply replacing parts?

Yes. It includes factory adjustment procedures for the cylinder, concave and variable drive assemblies so technicians can restore proper crop threshing using New Holland specifications.

Are the grain elevator and tailings elevator covered in separate repair sections?

Yes. Both systems have dedicated workshop procedures covering inspection, rebuilding and servicing, allowing feeding problems to be diagnosed at their source rather than through trial-and-error repairs.

Can this manual help during an off-season combine rebuild?

Absolutely. Many owners use it throughout winter maintenance to inspect straw walkers, transmission components, hydraulic circuits and cleaning assemblies before the next harvest begins.

Does the manual include the original wiring diagrams?

Yes. Factory electrical wiring diagrams and troubleshooting procedures are included, making it much easier to locate charging, lighting and control circuit faults.

Why is this manual especially valuable for older New Holland combines?

Because replacement parts for classic combines are not always readily available, accurate inspection measurements, repair sequences and factory service limits help determine whether components can be rebuilt safely instead of being unnecessarily replaced.