The APH Rebuild Program - NH 8000 Combines

In the Beginning

During the first stage of the rebuilding process the combine is stripped down to the base chassis. Its parts and components are removed for inspection.

The stillaged parts will be carefully examined and grouped. The engine, gearboxes, hydraulics, and other parts requiring reconditioning, or rebuilding, are dispatched to the reconditioning shop.
Components such as belts, chains, bearings and other non rebuildable items will be scrapped

The old and the new contrast dramatically. Our quest for quality without compromise begins at this stage. Our staff are dedicated to ensure that total quality excellence from beginning to end, will ensure that a rebuild combine equals the level of reliability and performance of new.

Shot blasting and Re-fabrication

The combine shell and header once totally stripped down go next to have all traces of rust removed, while smaller components like shafts and pulleys will be dipped into an acid bath. it is essential to remove all traces of rust before and rebuild work is undertaken. Re-fabrication work is extensive. Grain pans, sieves, elevators, and most of the combine panels will be replaced with new.

A straw elevator stripped of all shafts and pulleys is shot blasted to remove paint and rust prior to re-spraying, This will be essential if the combine is to be restored to its original new condition.

This shot blasted header has been stripped to the frame. The photograph shows our engineer fitting a new panel. By the time the header is fully rebuilt most of the original components will have been replaced.

Reconditioning the engine and major components

Reconditioning engines and major components, such as gearboxes and the hydraulic system, is carried out by our specialist engineers. Gearboxes are totally stripped down and every individual component inspected for signs of damage and wear. By implementing in depth examination and strict quality control procedures, APH, can ensure that reliability and performance will be achieved.

Bubble up auger and rotor-thresher gearboxes incur a lot of wear and tear during their hard working life. This gearbox has been totally rebuilt to insure many more hours of trouble free operation.

An engineer puts the final assembly on the reconditioned transmission gearbox. Engines are totally dismantled and meticulously examined for signs of wear.

The Mercedes 401 engine on the engineers bench

A thorough coat of paint

First impressions count for a lot. We at APH had these impressions in mind we considered re-spraying rebuilt harvesters. The technique, the paint process, and the type of paint, were all carefully considered and implemented. we recognized and understood that all rust had to be completely disposed of, before any preparation work could be carried out effectively, to produce long lasting results.

The secret to any good paint finish is the preparation. Before the combine shell is sprayed it first goes to the shot blasting shop.

All rust is removed by shot blasting. A zinc based prima is then applied. Smaller panels and components are acid dipped and then coated with a rust preventative.
The combine shell is sprayed with a 2 pack high build finish paint, which not only produces a high gloss finish but also has long lasting results. The combine is also sprayed in 3 stages, the shell, the individual parts, and the completed assembly. This process ensures all areas of the combine receive a through coat of paint.

The First Assembly work begins

Systematic assembly along the production line will ensure nothing is left off. Only parts of the highest quality are used in the rebuild programme, and by the time the rebuild assembly is completed, every belt, chain, and bearing will have been replaced with new.

The drum speed Variators are assembled. New improved rasp bars will dramatically increase the combines threshing performance.
New chain and paddles are fitted to the elevator. An engineer checks the new straw elevator chain and slats. We have now reached the half way stage of the rebuild.

The final assembly

The combine is also fitted with either a new or reconditioned engine. Every gearbox has been fully reconditioned, and the heavy duty concave fitted as standard, together with the new improved rasp bars, will dramatically improve the combines output. Every component on the combine rebuild will have been examined to determine its condition and serviceability, and any parts that have shown signs of wear will have been replaced with new.

Our quest for quality permeates every area of our company. The concept is that each person influences the work that passes through his hands to ensure total quality excellence from the start of the rebuild assembly to the finished product.

A new feed auger is lowered into position. The old header has been stripped to the frame and rebuilt.

The high capacity header

The header is the first contact with the crop. The rebuilt header will handle the crop with care and will cope with dozens of crop conditions. The large diameter reel with its zinc coated tines will easily pick up the crop and carry it to the auger. The fore and aft movement by means of nylon rollers allows accurate settings to be made. The feed auger is protected by an audible slip clutch on the feed drive. If a blockage does occur, simply put the header into neutral. A simple pull on a lever in the cab will operate the reversing mechanism which puts the auger into reverse.

The attachment and removal of the header is swift and straightforward. No fiddling about with belts or chains, just a quick release coupling. There is only a single control for header changing, merely engage a single lever. You do not even have to walk around to the other side. Fast cutting of all grain crops is provided by the wobble-drive gearbox operating at 1060 cuts per minute

All rebuild headers feature large diameter augers. Working in conjunction with the full width retracting tines the material is fed into the straw elevator in a smooth even flow. Horizontal reel adjustments are easily made and reel speed is electrically controlled from the cab. The headers also feature a double skimmed bottom with full width high grade steel skids. As well as protecting the auger flights and fingers, they help prevent bulldozing and improve header flotation.