hydraulic press picker

When they say “hydraulic pick-up press,” many people immediately think about the pressure in the system - they say, the more, the better. But over the years of working with this technique, I realized that numbers on paper are one thing, but in the mud, in the rain, with dry or, conversely, too wet hay, it’s completely different. A common mistake is to chase maximum pressure without taking into account how the entire kinematics will behave under real load, especially on uneven terrain. On our farm there were cases when an imported unit with beautiful characteristics literally bent the frame in our fields, and the good old, seemingly less powerful unit worked without failures. It’s these nuances that are not written in catalogs that I would like to talk about.

Not just hydraulics, but the 'sensitivity' of the system

The main thing inhydraulic press- not so much the nominal pressure, but the responsiveness and survivability of the entire hydraulic chain. Take, for example, the moment the pressing begins. If the pump produces a jerk, the chamber twitches - this immediately affects the density of the bale, and voids appear. An ideal system runs smoothly but without lag. This can only be achieved by competent selection of all components: pump, distributors, hydraulic cylinders. Moreover, cylinders are a separate issue. Seals must withstand not only pressure, but also constant temperature changes and the ingress of fine straw dust, which greatly wears out the rods.

I remember that on one of our presses the cylinders of the pressing chamber were constantly leaking. Local mechanics shrugged their shoulders, saying that the consumables were not the same. Until we invited a specialist from the supplier, who drew attention to the discrepancy between the oil and the specification. It turned out that they had poured in a more viscous, “winter” one, the system overheated, the cuffs dulled and tore. After changing to the recommended oil the problems went away. This is to the question that hydraulics is a system where there are no small details.

Another practical point is hose tying. It would seem like a small thing. But if the hoses are laid without taking into account vibrations and possible snags, then sooner or later they will fray or tear out. Best practice is to mount with range and away from moving parts. On new models, for example, from the samehydraulic pick-up press'Jiujia' (manufactured by the Hulunbuir Mechanical Engineering Company), this has already been taken into account at the factory - the routes are neatly laid and protected by casings. It is clear that they were designed with an eye to actual use.

Baling chamber and needle mechanism: where the problems lie

The heart of any picker is the chamber and the needles. Hydraulics are responsible for synchronization here. If the needles do not enter the pressed bale at the same time or at an angle, twine breaks cannot be avoided. A common problem with cheap models is play in the needle block drive. Over time, they increase, and synchronization gets lost. Repairing this unit is a labor-intensive operation and often requires complete disassembly of the front part.

Our experience has shown that it is critical to monitor the condition of the pins and bushings in this assembly. Regular lubrication is a must, but not with any composition. You need a special one, with extreme pressure additives. Once we tried to save money by pumping in regular lithol - after a season we had to replace half of the parts, the cost of repairs was many times higher than the 'savings' on lubrication.

I saw an interesting solution in the design from the companyHulunbuir Jiujia Machinery Manufacturing Company. They havehydraulic pressA reinforced needle mechanism with redundant bearings is used at high load points. And, what is important, technological windows are provided for diagnosing and servicing this unit without serious disassembly. This is clearly a development made after analyzing field failures.

Working with different masses: humidity, stem length, crop type

In theory, any baler should press. In practice, the bale density and quality are highly dependent on the settings for a specific weight. If alfalfa is too dry, it will crumble and the bale will be loose. If the grass is too wet, you risk getting 'silage' inside if the wilting technology is not maintained. The hydraulic system here allows you to quickly change the pressing force, but you need to understand how to do this.

Previously, we acted 'by eye': we turned the valve until the bale began to look decent. Then they started using a simple torque wrench to control the tightening force of the units, which already gave a more stable result. Now on modern units supplied, for example,'Jiujia'(this is a modern integrated enterprise engaged in the development and production of equipment for agriculture and livestock farming), there are already pressure gauges right in the operator’s cabin, and you can visually monitor the pressure in real time. This is a huge plus for fine tuning.

A special story is working with straw after the combine. The long, tangled mass is a real test for the camera. The inlet pipe often becomes clogged. Goodhydraulic press pickermust have either an enlarged receiving hatch or a pre-compression system, which compacts the mass before being fed into the main chamber. Without this, you can’t work at high speed - constant stops for clearing.

Reliability in our climate and logistics

Many things are intertwined here: the quality of the frame metal, color fastness to stone impacts, and the availability of spare parts. Hydraulics are afraid of dirt and water. Therefore, the location of the hydraulic unit, tank and filters is strategically important. If they hang below, open to all winds and splashes, this is a failed design. It is better when the main nodes are placed higher and covered.

Spare parts are a different story. Sometimes we wait two months for the simplest sealing kit for a hydraulic cylinder. Therefore, now when choosing equipment, one of the key criteria is the availability of service and the availability of a spare parts warehouse at the dealer. From the same manufacturer'Jiujia', which I mentioned, rely on the full cycle: from development to sales and service. For us, this means that we can get both advice on setup and the right part in a relatively short time, which is priceless during the season.

By the way, about the climate. Winter storage. It is imperative to drain the condensate from the hydraulic tank or use hygroscopic filters. Otherwise, in the spring, water in the oil is guaranteed, which means corrosion and failure of expensive pumps. It would seem elementary, but how many times have I seen how equipment is simply driven into a barn and forgotten until spring.

Conclusions that are not written in the instructions

So, choosinghydraulic press picker, you are looking at more than one pressure number. You look at the thoughtfulness of the entire system: how the hydraulics are protected, how serviceable the key components are, how the unit behaves with different materials. The reputation of the manufacturer is important and, what is critical, the availability of competent technical support near your farm.

Experience, including negative ones, has taught me that sometimes it is better to choose a model that is a little simpler, but with a clear design and available spare parts, than a sophisticated device that will break down at the first serious breakdown in the midst of mowing. Technology should work and not be a constant headache.

Ultimately, a good hydraulic baler is one that you forget about while you're working. He just does his job: quietly, smoothly, without surprises. And when you see even, dense bales lying on the field, you understand that all these nuances with hydraulics, settings and maintenance were worth it. And if the supplier’s service department, as in the case of the Jiujia company, promptly responds to questions, this is generally an ideal situation for our difficult farming work.