The Geoprobe 7822 DT is a rubber tracked high-capacity direct push machine with a narrow platform for limited access areas. It is fully capable of direct push probing with the GH64 percussion hammer, which now has two new significant features: a Modular Percussion Power Cell and integrated two-speed, bi-directional rotation. This is an industry first, and allows us to perform numerous rotational applications, including surface pavement coring and subsurface rock coring, with a rotation speed of up to 550 rpm.
The GA4000 augerhead allows for augering with solid and hollow stem augering to depths over 100′, with the capability of coring bedrock through the augers. We can perform NQ, HQ and PQ coring of bedrock to depths of 150′.
Features – Geotechnical Drilling / Environmental Drilling / Exploration Drilling / Percussion Drilling
| 7822DT Geoprobe | |
| Stroke | 78 in. |
| Weight | 7,555 lb. |
| Width | 7 ft. |
| Length (folded) | 133 in. |
| Height (folded) | 94.5 in. |
| Height (unfolded) | 184 in. |
| Side Movement | 25 in. |
| Oscillation | +/- 10 deg. |
| Foot Travel | 20.5 in. |
| Extension | 15.5 in. |
| Down Force | 36,000 lb. |
| Retraction Force | 48,000 lbs |
| Percussion Rate | 32 Hz |
| Fuel Capacity (diesel) | 17 gal |
| Engine (diesel) | Kubota, 4-cylinder turbo |
| Engine Power | 58 hp |
| Rear Stabilizer Lift | 2,000 lb. |
| Ground Speed | 0-5 mph |
| Surface Load | 4.6 lb/in² |
| Winch Rating | 2,350 lb. |
| Winch Speed | 0-126 fpm |
| GH64 Hammer | |
| Torque (high torque) | 450 ft. lb. |
| Torque (low torque) | 225 ft. lb. |
| Rotation (low speed) | 0-250 rpm |
| Rotation (high speed) | 0-500 rpm |
| Augerhead Specs | |
| Torque (high torque) | 4,000 ft. lb. |
| Torque (low torque) | 2,000 ft. lb. |
| Hex adapter | 1-5/8 in |
| Rotation (low speed) | 0-95 rpm |
| Rotation (high speed) | 0-150 rpm |