QH70 Power Takeoff PTO FAST 8JS 9JS 10JS 12JS
Product Description
QH70 Power Takeoff PTO FAST 8JS 9JS 10JS 12JS
QH70 (Including QH70A/C)
Rear-mounted, Auxiliary Countershaft Power Take-off
1. Core Parameters
Rated torque: 700 N·m (40% higher than QH50) Gear ratio: 0.74–2.39 (typical 0.80); QH70A: 0.925–2.98 Control mode: Bi-directional pneumatic engagement, automatic disengagement when air supply cuts off Rotation direction: QH70 same as engine; QH70A reverse rotation Output type: Flange / spline (8-spline commonly used, larger specification than QH50) Weight / Dimension: Approx. 42 kg, 35×38×32 cm (larger and heavier than QH50) Working air pressure: 0.7–0.8 MPa (same as QH50)
2. Compatible Gearboxes (Fast Twin Countershaft)
Suitable for 9-speed, 12-speed and 16-speed heavy-duty gearboxes (such as 12JSD, 16JSD series) Not recommended for 7/8-speed gearboxes (mismatched torque and gear ratio) Typical vehicles: 25–50 ton truck cranes, heavy-duty dump trucks, fire trucks, cement tank trucks
3. Key Difference vs QH50 Series
表格
| Model | Rated Torque | Gear Ratio | Control Mode | Compatible Gearbox | Typical Application |
|---|---|---|---|---|---|
| QH50A/B/C/D | 500 N·m | 14:26 (≈0.54) | Single-direction pneumatic | 7/8/9-speed | Sanitation vehicles, light/medium dump trucks, small truck-mounted cranes |
| QH70 | 700 N·m | 0.80 (standard) | Bi-directional pneumatic | 9/12/16-speed | Large tonnage cranes, heavy-duty special vehicles |
4. Common Models
QH70: Basic model, same rotation direction, gear ratio 0.80
QH70A: Reverse rotation, gear ratio 0.925–2.98
QH70C: Extended flange / spline, suitable for high-flow hydraulic pumps