CLAAS MEGA 370 4x4 with C 660 header: specifications, differences from the MEGA 360 and what to inspect
20.10.2026
CLAAS MEGA 370 4x4 with C 660 header
The CLAAS MEGA 370 is the most powerful model in the MEGA 3xx series: a straw walker combine with the APS accelerated threshing system, a 260 hp Mercedes-Benz engine and an 8,200 L grain tank. Compared with the MEGA 360, it has the same threshing and separation unit but more power, which gives reserve with a wide header, in maize and in tough conditions. Here is what that means for this specific 2007 CLAAS MEGA 370 4x4 + C 660 with 2,750 engine hours, and what to check when you inspect it.
Key points
- The MEGA 370 and MEGA 360 share the same threshing drum, 6 straw walkers and 5.65 m² total sieve area; the difference is power: 191 kW versus 180 kW (ECE R24).
- 4x4 drive and AUTO CONTOUR are most useful on wet ground, sloping fields and during the autumn maize harvest.
- The two-stage drum gearbox provides a 280-650 rpm range, which maize and sunflower require, without overloading the threshing unit.
- On a used straw walker combine, drum hours and walker condition tell you more than paintwork or engine hours.
Contents
- Where the MEGA 370 sits in the CLAAS MEGA series
- MEGA 370 versus MEGA 360 and MEGA 350
- APS and straw walker separation: how the combine works
- C 660 header and 4x4 drive
- Specifications of the CLAAS MEGA 370 4x4 + C 660 at Agritec
- Maize and sunflower with the MEGA 370
- Inspecting a used MEGA 370: what to check
- Which farms it suits
- Enquiries and next steps
- Frequently asked questions
Where the MEGA 370 sits in the CLAAS MEGA series
The CLAAS MEGA series is a class of straw walker combines positioned between the smaller MEDION and the larger LEXION. The MEGA 350, 360 and 370 were built in the second half of the 2000s, with the MEGA 370 being the last and most powerful of them, produced around 2005-2009. All three models have the APS accelerated threshing system and the 6.4 L Mercedes-Benz OM 906 LA engine.
The logic of the series is simple: one design with different power outputs and threshing unit sizes. So when choosing between them, the question is not which is newer, but how much power you need for your header, crops and terrain.
MEGA 370 versus MEGA 360 and MEGA 350
The MEGA 370 and MEGA 360 are almost identical in threshing and separation, while the MEGA 350 is narrower and has 5 straw walkers. The data below comes from the CLAAS technical brochure for the MEGA series.
| Specification | MEGA 350 | MEGA 360 | MEGA 370 |
|---|---|---|---|
| Power (ECE R24) | 162 kW (220 hp) | 180 kW (245 hp) | 191 kW (260 hp) |
| Drum width | 1,320 mm | 1,580 mm | 1,580 mm |
| Straw walkers and area | 5, 5.80 m² | 6, 7.00 m² | 6, 7.00 m² |
| Total sieve area | 4.70 m² | 5.65 m² | 5.65 m² |
| Grain tank | 7,200 L | 8,200 L | 8,200 L |
The takeaway: the MEGA 370's advantage over the MEGA 360 is power, while the threshing unit is the same. The extra 11 kW matters most with headers of 6.6 m and wider, in maize, and on hilly or heavy fields. On flat cereal land with headers up to 6 m, both models have the same walker and sieve area, so the condition and price of the individual machine decide. A detailed look at the smaller model is in the article on the CLAAS MEGA 360 with APS and a Mercedes engine.
APS and straw walker separation: how the combine works
APS is an accelerated threshing system: a smaller accelerator drum in front of the main drum feeds the crop at higher speed and separates part of the grain before main threshing. On the MEGA series, the accelerator drum turns at 80% of the speed of the main drum, which has a diameter of 450 mm.
After the drum, the straw passes over 6 straw walkers with a total area of 7 m², where the remaining grain is separated. Straw walker separation is gentler on straw than rotary separation, which is why walker combines remain the preferred choice where straw is baled. The limitation comes with very wet, heavy material: walker capacity then sets the harvesting speed.
If you are comparing classes, the comparison of CLAAS TUCANO and LEXION shows how output changes across newer generations of walker and hybrid machines.
C 660 header and 4x4 drive
The C 660 is a grain header from the CLAAS C series with a working width of about 6.6 m. According to the CLAAS brochure, it is one of the standard options for the MEGA series, alongside headers from 3.9 to 9 m. The C 660 is also found on larger machines, for example in the CLAAS LEXION 450 + C 660 combination.
At 6.6 m and 6 km/h, theoretical output is about 40 decares (4 ha) per hour. Actual output depends on yield, moisture and losses, but the figure is a useful reference when planning the harvest.
The 4x4 designation means a driven rear steering axle. With the MEGA 370's hydrostatic drive, this adds traction when the grain tank is full, the ground is wet or the field slopes. AUTO CONTOUR follows the terrain and keeps the header at an even height above the ground, which reduces losses on uneven fields.
With a 6.6 m header fitted, the combine is too wide for road transport, so the header is usually moved on a header trailer. The Agritec machine has an automatic trailer hitch, which makes this easier.
Specifications of the CLAAS MEGA 370 4x4 + C 660 at Agritec
According to the listing, the machine is imported, serviced and ready to work. The data below is from the product page.
| Specification | CLAAS MEGA 370 4x4 + C 660 |
|---|---|
| Year of manufacture | 2007 |
| Engine hours | 2,750 |
| Engine | Mercedes-Benz OM 906 LA, 6.4 L, 6-cylinder |
| Power | 191 kW (260 hp) |
| Threshing system | APS, 6 straw walkers |
| Drum gearbox | Two-stage: 280-650 and 650-1,500 rpm |
| Grain tank | 8,200 L |
| Drive | Hydrostatic, 4x4 |
| Tyres | Drive axle 800/65 R32, steering axle 540/65 R24 |
| Header hydraulic cylinders (feeder house tilt) | 3 x ⌀ 55 mm |
Additional equipment: AUTO CONTOUR, maize equipment, 3D cleaning system, chaff spreader fans behind the sieves, straw chopper, vacuum cleaning system, additional fuel filter, BORDINFORMATOR, air conditioning, radio, work lights, air-suspended comfort seat and electric mirrors. Photos and video are on the CLAAS MEGA 370 4x4 + C 660 page.
According to the CLAAS brochure, the 8,200 L grain tank unloads at 72 L/s, so a full tank empties in about 2 minutes. The number of haulage vehicles you need depends mainly on the distance to the store: over short distances one may be enough, while with a more distant store it pays to plan unloading on the move rather than leaving the combine waiting with a full tank.
2,750 engine hours on a 2007 machine averages under 150 hours a year. The average is a reference point but does not prove how hard the machine worked: assess it together with drum hours, which the listing does not state and are worth requesting, and with the service history.
Maize and sunflower with the MEGA 370
The MEGA 370 is suitable for maize and sunflower when the drum runs in the low range and the concave suits the crop. The two-stage gearbox gives 280-650 rpm for large-seeded crops and 650-1,500 rpm for cereals, so the combine does not have to run at compromise speeds.
When switching crops, check three things:
- The drum gearbox: the low range must engage cleanly and hold speed under load. If it is worn, the replacement part is a planetary gearbox for reducing drum speed, listed for the MEGA, TUCANO, MEDION and DOMINATOR series. Before ordering, verify part number 0006287241 against the serial number of the specific combine.
- The concave: maize requires dedicated concaves, such as the CLAAS MEGA corn concaves with 19 x 40 mm openings, OE 0006629001. A MEGA series designation does not guarantee compatibility with every machine, so verify the part number against the serial number here too.
- The header: the C 660 is a grain header, and harvesting maize for grain requires a separate maize header. The choice between a header with built-in stalk chopping and one without is covered in the article on corn headers and adapters.
In maize, losses often come not from the combine but from a poorly adjusted header and excessive speed. How to measure and reduce them is explained in the article on corn harvest losses.
Inspecting a used MEGA 370: what to check
On a straw walker combine, the most expensive repairs are in the threshing unit, the straw walkers and the hydrostatic drive. Paintwork and the cab are the last things that determine value.
- Ask for drum hours and the service history. The gap between drum hours and engine hours shows how much the combine has run on the road and at idle.
- Inspect the rasp bars on the accelerator and main drums and the concave for uneven wear and cracks.
- Check the walker crankshafts and their bearings: play causes noise and vibration in operation.
- Inspect the 3D sieves and the fan for bending, patch repairs and correct adjustment.
- Test the hydrostatic drive and the 4x4 rear axle on a slope under load: no knocking, no overheating and no leaks.
- On the C 660 header, check the knife, fingers, auger and header flotation, as well as the three feeder house hydraulic cylinders.
- Switch on the BORDINFORMATOR and check that it reads drum, fan and straw chopper speeds.
Documents are part of the inspection. An imported combine is registered under the Bulgarian Agricultural and Forestry Machinery Registration and Control Act, so check that the origin and ownership documents match the frame and engine before you pay a deposit.
The Mercedes-Benz OM 906 LA engine is also widely used in trucks and construction machinery, which makes servicing easier. Further criteria for the listing and the paperwork are in the article on spotting a good used CLAAS combine deal, and the list of the most demanded CLAAS spare parts helps you budget for the first season.
Which farms it suits
The CLAAS MEGA 370 4x4 + C 660 suits a farm harvesting its own cereals, oilseed rape, maize and sunflower that wants a simpler machine without the electronic systems of newer generations. Straw walker separation preserves straw for baling, and the 8,200 L grain tank reduces unloading stops.
| Farm situation | Is the MEGA 370 4x4 + C 660 a fit? | Why |
|---|---|---|
| Cereals and oilseed rape, flat fields | Yes | 6.6 m header and 8,200 L tank with power in reserve |
| Maize and sunflower in the rotation | Yes, with a maize header | Two-stage drum gearbox and maize equipment |
| Hilly or wet fields | Yes | 4x4 drive and AUTO CONTOUR |
| Straw for baling | Yes | Straw walker separation preserves straw |
| High-volume contract harvesting | Depends on area and timing | Compare decares per hour and costs with a larger-class combine |
The straw chopper and the chaff spreader fans behind the sieves are important for farms using minimum tillage or direct drilling. Evenly spread straw and chaff leave no strips that interfere with the drill and with emergence of the next crop.
For high-volume contract harvesting, the decision depends on area, yield, harvest window and costs. There it is worth comparing the MEGA 370 with a larger-class machine on actual decares per hour, fuel consumption and the cost of downtime. When planning costs, it helps to know what drives fuel consumption on CLAAS combines, because at 260 hp the settings directly affect litres per decare.
After the season the machine needs proper storage: cleaning, greasing and protecting the hydraulics. The steps are described in the guide to winterising CLAAS combines.
Enquiries and next steps
The price of the CLAAS MEGA 370 4x4 + C 660 is not published and is provided on enquiry. Agritec Ltd is based in Targovishte, Bulgaria, and offers sales and service of agricultural machinery, spare parts and leasing schemes.
- Send an enquiry and ask for drum hours, the service history and exactly what the maize equipment includes.
- Arrange a viewing with the engine running, the threshing unit engaged and a 4x4 test.
- Agree on transport of the combine and header, and on leasing terms.
To compare with other available machines, the used agricultural equipment section lists all Agritec offers. For questions about this combine, use the Agritec contact page.
Frequently asked questions
What is the difference between the CLAAS MEGA 360 and MEGA 370?
Both models have the same 1,580 mm drum, 6 straw walkers and an 8,200 L grain tank. The MEGA 370 has 11 kW more power (191 versus 180 kW, ECE R24), which gives reserve with a wide header, in maize and in tough conditions.
Can the CLAAS MEGA 370 harvest maize?
Yes, with the drum in the low 280-650 rpm range, corn concaves and a separate maize header. The C 660 grain header is not used for maize.
What does 4x4 mean on a combine?
It means a driven rear steering axle. It adds traction on wet ground, on slopes and with a full grain tank.