Iseki GEAS TG21-TG33 hydraulics, PTO and implements
Which implements can you use with the Iseki GEAS TG21-TG33? That depends on both PTO power and your drawbar pull — two different things that are often confused. Below you'll find the hydraulics and PTO specifications for the series, along with a realistic estimate per power class.
Suitable for the entire series: TG21, TG23, TG25 (+TG25N), TG27, TG29 (+TG29F-16), TG31 and TG33.
PTO shaft and speeds
| Model | Engine power | PTO speeds (rpm, 4 settings) |
|---|---|---|
| TG21F/-06 | 15.4 kW (21.0 hp) | 561 / 720 / 1037 / 1246 |
| TG23F/-06 | 16.9 kW (23.0 hp) | 561 / 720 / 1037 / 1246 |
| TG25F/TG25NF | 18.4 kW (25.0 hp) | 561 / 720 / 1037 / 1246 |
| TG27F | 19.9 kW (27.0 hp) | 584 / 749 / 1079 / 1296 |
| TG29F/-16 | 21.3 kW (29.0 hp) | 584 / 749 / 1079 / 1296 |
| TG31F | 22.8 kW (31.0 hp) | 569 / 729 / 1051 / 1262 |
| TG33F | 24.3 kW (33.0 hp) | 569 / 729 / 1051 / 1262 |
The PTO shaft has a 6-spline profile with a shaft diameter of 35 mm — always check this when purchasing an implement, especially with second-hand attachments that may have been made for a different brand.
Lift system
All models in this series feature a 3-point lift system with position control (JIS type 1 coupling) and a fixed drawbar hook (available separately as an accessory). The lowering speed of the lift is adjustable via a control knob — when set to the locked position, the implement will not lower, which is often mistaken for a hydraulic fault (see the troubleshooting blog for more examples of this). The manufacturer does not specify an exact lift capacity in kg per model in the manual; if in doubt about a heavy implement, check the specification or test it in practice with the implement close to the ground.
What can you do with 21 to 33 hp?
PTO power (the power delivered to a driven implement) and drawbar pull (the force the tractor can exert on the ground) are two different things. A light tractor with plenty of horsepower may easily drive a rotary tiller, for example, yet still slip when doing heavy ground work if weight and tyre grip fall short. For the GEAS TG series, with weights ranging from approx. 1,190 kg (TG25NF) to 1,355 kg (TG33F), this means in practice:
- TG21-TG25 (21-25 hp): well suited for a flail mower up to approx. 1.2-1.4 m, a light rotary tiller, a leaf blower/sweeper, a single-furrow plough on light soil, and general transport work with a tipping trailer up to approx. 1.5 tonnes.
- TG27-TG29 (27-29 hp): a step up: a tiller up to approx. 1.5 m working width, a two-furrow plough, a medium-sized flail mower, a manure spreader for small-scale use, and a front loader for lighter lifting and scooping work.
- TG31-TG33 (31-33 hp): the heaviest in the series, suitable for a larger tiller or cultivator, a two-furrow plough on heavier soil, a rotary harrow, and a front loader with slightly higher lift capacity — though this remains a compact tractor and not a substitute for an agricultural tractor when it comes to structurally heavy work.
For every implement, check the required PTO speed (usually 540 or 1000 rpm for larger implements — this series, at 561-1296 rpm, is closer to the smaller implement standard) and whether your version reaches the correct speed.
