In the 300-series work machine carriers introduced in 1984, the technology of the Farmer 300 series was applied. However, the engines were still Deutz air-cooled models to save space. The transmission was Farmer's 21+6, and the lifting capacity was significantly increased compared to previous work machine carriers by means of auxiliary cylinders. Front brakes were also included in the work machine carriers in the 40 km/h versions.

The first models were rear-wheel drive: 345, 360, and 380 (45/60/80 hp). The lineup offered versions with both long and short (GTF) wheelbases. Additionally, the 380 had a GTH (later GH) version with 65–70 cm ground clearance. The front axle was similar to those in Farmers, equipped with a friction brake.

In 1985, the first four-wheel-drive work machine carriers were introduced: 365 GTA, 380 GTA, and the high 380 GHA. The rear-wheel-drive work machine carriers had a central lifting device as per the original idea, whereas the four-wheel-drive models came standard with a front lifting device (2140 kg) and front power take-off.

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