4” GP400 – DHD340
The GP400 is a high performance hammer which can drill under a head of water, typically suited to Waterwell and Geothermal applications due to its non-ported piston design.
It features a choke facility which helps to adjust air flow through the hammer.
| At a Glance | |||
|---|---|---|---|
|
Size
|
Shank
|
Air pressure
|
Air flow
|
|
108mm - 140mm
4 1/4 - 5 1/2 |
DHD340
|
100 - 435 psi
7 - 30 bar |
180 - 850 cfm
5097 - 24069 l/min |
| Hammer Overview | ||||
|---|---|---|---|---|
| Hammer Model | GP400 | |||
| Part Number | 600466 | |||
| Shank | DHD340 | |||
| Thread Connection | API Reg Pin Up 2 3/8" | |||
| Minimum Bit Diameter | 108mm | |||
| Hammer Flat Size | 66mm (2.560") | |||
| Weight | 40 Kg (122.3 lbs) | |||
| Outside Diameter | 98mm (3.858") | |||
| Length (shoulder to shoulder) | 954mm (37.5") | |||
| Minimum Weight On Bit | 250 Kg (550lbs) | |||
| Maximum Weight On Bit | 500 Kg (1100lbs) | |||
| Parts List | Maintenance Kits | ||||
|---|---|---|---|---|---|
| Type | GP400 | Service Kit | Repair Kit | ||
| Shank | DHD340 | ||||
| Item | Description | Part No. | SK72 | RK123 | |
| 1 | Thread Protector | 200111 | No | No | |
| 2 | Top Adaptor | 602646 | No | No | |
| 3 | O-Ring | 768190 | Yes | Yes | |
| 4 | Choke - Solid | 604480 | Yes | Yes | |
| Choke - 1/8" | 604481 | Yes | Yes | ||
| Choke - 3/16" | 604482 | Yes | Yes | ||
| 5 | Non Return Valve | 604444 | No | Yes | |
| 6 | N.R.V Spring | 760079 | Yes | Yes | |
| 7 | Make up Shim - 4.9mm | 602634 | No | Yes | |
| Make up Shim - 5.3mm | 602635 | No | Yes | ||
| Make up Shim - 5.7mm | 602636 | No | Yes | ||
| 8 | Compression Ring | 604994 | No | Yes | |
| 9 | Air Distributor | 604992 | No | No | |
| 10 | O-Ring | 768204 | Yes | No | |
| 11 | Liner | 604991 | No | No | |
| 12 | Cylinder | 604990 | No | No | |
| 13 | Square Snap Ring | 604995 | No | No | |
| 14 | Piston | 604993 | No | No | |
| 15 | Snap Ring | 783029 | Yes | Yes | |
| 16 | Bit Retaining Ring | 603255 | No | Yes | |
| 17 | Chuck | 603932 | No | Yes | |
| Foot Valve | 601773 | No | Yes | ||
