Tips & Tricks


Claas Front axle drive shafts

Warning, danger to life!!!

In the first cut of the 2022 season, a steep slope had to be harvested. The machine was chopping downhill when, for no apparent reason, it suddenly picked up ground speed rapidly. The reflexive stepping on the brake pedal only caused the machine to yaw to the left, but there was no noticeable braking deceleration despite the all-wheel drive being switched on. As a last resort, the driver quickly turned the steering wheel to the left in order to bring the machine, which fortunately stopped despite the relatively high speed, to a halt across the slope. At the time in question, the tractor with trailer was to the right of the chopper, otherwise a collision would have happened here as well. The reason for this behavior: A broken right drive shaft on the front axle!

Therefore, the urgent advice to all owners of such a Claas axle is to check the drive shafts in your own interest with a "crack detection spray"!

All Mengele SF 6 and SF 7, Claas 690 to Jaguar 800 (Type 490), all Claas Dominator/ Mega and the Case "CF" machines are affected!

This list does not claim to be complete!

 


Repair of panels for fan- and cutting-houses

It happens again and again that we come across fan and drum panels that have been "repaired" by some previous owner. The panel on the left is a classic example: From the outside it looks absolutely flawless. The "repair" is even so well done that it is not immediately recognizable as such (click on the picture).

On the inside, all the horror comes to light: A metal sheet was simply welded over the worn-out original casing sheet from the outside. The original sheet metal was not cut out. The result: Razor-sharp metal plates gradually detach from the worn original metal plate, which then end up in the feed and then cut open the esophagus and stomach of your animals from the inside.

With such a cover plate you put your animals in danger!

Therefore, check all your drum and fan bases, such work has also been seen on fan housings!

This recommendation applies to forage harvesters of all types and manufacturers. We always have all panel plates in stock, these are available at short notice.

For third-party products, we have panels plates on request.

 


Optimized crop flow at PU 3000

In order to make the flow of forage from the pick-up to the chopping unit more constant, the corners of the outlet chute were smoothed out on this pick-up. The forage no longer has to change direction once by 90°, but only once by 30° and then by 60°. The result is a more even feeding of the chopper.


Passenger seat at SF 6

Here is an example of a relatively simple passenger seat that you can build yourself: A plastic plate was attached to the rear wall of the cabin using two sturdy hinges, which can be folded up using compression springs. A piece of flat iron attached to the door frame serves as a stop when folded down. Since the space in the cabin is relatively cramped at this point, the driver's seat was moved about 30mm to the right.


Filling quantities of air conditions

The specified values do not correspond to the official specification, but have nevertheless proven to be a good fit in practice.

SF 6 series: 1.4 kg

SF 7 series: 1.9 kg

R 134a is used as the refrigerant.


Hydraulic cylinder main drive SF 6

Lately there have been frequent machine failures with the SF 6 due to the hydraulic cylinders 02-064 999 actuating the main drive idler. All machines had between 4,000 and 4,500 operating hours on the meter.
It is recommended to replace this cylinder with appropriate number of hours as a precaution!


Setting of assembly carriage limiters at chopping unit

Due to several inquiries regarding the correct setting dimension of these stops, which limit the lowering of the chopping-unit downwards, their function should be briefly illustrated using a sketch (click on the sketch).
Ultimately, these stops set the "discharge angle" of the cutting cylinder. If the "X dimension" of these stops is too short, the cylinder does not throw directly into the blower but upwards onto the grass chute.
This creates a certain "ping-pong effect" that can occasionally clog the machine.
Please pay attention to signs of wear on the inner-top of the grass shaft, these are clear indications!
In machines with 800/65-32 front axle tires, there is also the problem that the pick-up is relatively steep downwards, because the unit may only lower to a certain position due to the angle of discharge. As a result, the feed flow at the transition from the pick-up to the chopping unit becomes somewhat unconstant.
Two practitioners report, that shortening the cylinder base panel by about 2 cm on the outlet side brought about a significant improvement.
Due to this shortening, a further lowering of the chopping unit can then be permitted, so that a smooth feed flow is ensured at all transitions.
If you only have one single chopper unit for your machine, the procurement of two different drum bases could be a solution: one for corn, one for grass.


Slide rings upper intake rollers

The two upper intake rollers are each provided with slide rings on the left and right, which are intended to reduce the wear on the guides of the chopping unit frame.
Due to food residues and rust, these are often no longer movable and can so not fulfill their actual task.
It is recommended to test and restore the smooth running of these rings. If there are very strong traces of wear, these rings must be replaced to prevent further damage (click on the pictures).

Lubrication of main drive chain MG 41, MG 42 and MG 43 Z

The main drive chain of the four-row maize header is very uncomfortable to lubricate while the header is attached to the harvester.

This circumstance can be greatly improved without much effort by attaching a hose to the right side of the rear wall and simply inserting it through a hole in the chain guard.

So you can simply pour oil onto the chain from above while the header is running, without having to get close to the circulating chain.