Start with the condition of the fruit, not only its name
A line in an enquiry that says “apple” or “pear” does not describe a feed. The crusher sees a batch with a variety, maturity, temperature, size spread, skin condition and a history of handling. Those details change how the fruit presents at the inlet and what the receiving press or pulper can do with the result.
FAO’s general juice-manufacture principles place cleaning, sorting and inspection before size reduction and describe fruit characteristics as a reason for different extraction routes. The same chapter warns that poorly managed washing can increase contamination. A feed brief should therefore describe the preparation actually completed, not what someone intends to complete later.
Write down the variety or mix, the ripeness range, the temperature at delivery, the largest pieces expected and whether stems, leaves or damaged fruit are still present. If the answer is unknown, say unknown. An explicit gap is more useful than a reassuring average.
Treat hard stones as a separate decision
Stone fruit makes the boundary obvious, but the principle applies to any batch where hard material may be present. Crushing, de-stoning, pressing and pulping are distinct duties. A fruit crusher is not automatically a de-stoning machine, and a perforated section or a particular working assembly does not by itself prove that intact stones can pass through safely.
State one of three positions in the brief: stones are known to be absent, stones are removed upstream by a named method, or the stone condition is not yet confirmed. The third position is not an approval to run the material. It is a reason to keep the machine trial on hold until the separation step and its verification are defined.
The FDA’s juice HACCP guidance asks processors to consider physical hazards as part of a product-specific hazard analysis. That guidance does not certify a crusher, and a supplier’s brochure cannot replace the processor’s own analysis. The brief can make the question visible while preparation and equipment scope are still open.
Put foreign-material controls in the same document
A feed brief is more useful when it names the controls around the crusher instead of implying that the crusher is one. Incoming inspection may reject visibly damaged fruit, but it will not reliably find every stone, stem, piece of wood, glass fragment or metal item. Washing addresses surface soil; it is not a separative device for hard or dense objects.
Record who inspects the delivered lot, what they are trained to reject, where rejects go and how a rejected lot is prevented from re-entering the feed. If magnets, metal detection, screens or a de-stoner are part of the route, identify their location, test method and responsibility. If they are not part of the offered scope, say so plainly rather than leaving the reader to assume protection that does not exist.
Also include small items from the plant itself: fasteners, tools, packaging clips, temporary covers and worn parts. A control plan that considers incoming fruit but ignores maintenance activity is incomplete; the crusher outlet and transfer deserve the same inspection question as the inlet.
Name what receives the mash
The crusher is selected to prepare a feed for something else. That next operation might be a press, a pulper or a refiner, and each has its own permitted inlet condition. A brief that stops at “fine mash” or “coarse mash” leaves the most important acceptance question unanswered.
Describe the receiving machine, its normal loading cycle and what happens when it pauses. Confirm whether the transfer is gravity, pumped or conveyed, and identify the buffer and the signal that stops the crusher feed. A crusher that keeps running into a stopped receiver has an integration problem even if its own motor and working parts are healthy.
This is also where the brief should separate product requirements from equipment wishes. “The press needs a drainable bed” is a process observation. “Install a finer screen” is a proposed machine change. Keeping those statements distinct makes it possible to test the real requirement instead of arguing about a component.
Record variability as a range, not a single sample
Fruit changes through a season and between growers. A sample of soft, ripe fruit can hide a later batch with firm pieces, stems or a different size distribution. Ask for the firmest and largest material expected, as well as the softest and smallest, and decide which conditions the trial must represent.
Mixed feed needs its own decision. If one configuration will run different fruits, state whether changeover includes full cleaning and whether the next fruit is compatible with the previous residue. Averaging two dissimilar materials into one description is not a trial plan.
Keep the unknown conditions visible in the quotation and the acceptance record. A short trial can demonstrate behaviour only for the material and settings tested. It does not become a guarantee for every delivery, every ripeness stage or every downstream machine.
Make the trial sample match the written brief
The sample should arrive with an identity and a history: fruit type, variety if known, preparation, temperature, mass and the conditions it represents. Record the machine, working assembly, settings and any screen before the run. During the run, note pauses, abnormal noise, bridging or leakage rather than reporting only the collected product.
After the run, retain labelled output samples and inspect what stayed inside the machine. Send a representative portion to the intended press or pulper trial where practical. A crusher-only demonstration answers a narrower question; the brief should say which question is being asked.
Define acceptance items before the test: permitted feed, observed feed rate over a stated time window, mash condition by an agreed method, transfer behaviour, cleaning access and the exceptions not covered by the sample. This turns a site visit into evidence instead of an impression.
What the quotation should return
A quotation that responds to the brief should identify the offered model and working assembly, the permitted feed envelope, the inlet and outlet arrangement, the supply boundary and the responsibilities of each party. It should also state which conditions remain unverified and what trial evidence will close them.
No catalogue rate is a fruit-specific guarantee, and motor rating does not convert into kilograms per hour. Compare offers on the same prepared feed, receiving duty and measurement method.
The shortest version of the brief is therefore not a list of wishes. It is a short, honest account of what enters the crusher, what must not enter it, what leaves it and which evidence will show that the connected duty is understood.