Ditch-witch JT922 User Manual Page 110
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JT922 Operator’s Manual Systems and Equipment - 109
Downhole Tools
CMW
Downhole Tools
Nozzles
Nozzles control fluid flow from the pipe to the bore. Select nozzles that will supply at least the amount of
fluid per minute needed for the flow and pressure you will be using. A nozzle that will supply more fluid per
minute is recommended. See your Ditch Witch dealer for nozzle recommendations.
Bits
Selection
These charts are meant as a guideline only. No one bit works well in all conditions. See your Ditch Witch
dealer for soil conditions and bit recommendations for your area.
• 1 = best
• 2 = good
• 3 = fair
• 4 = not recommended
Bit Sandy
Soil
Soft Soil Medium
Soil
Hard
Soil
Rocky
Soil
Soft
Rock
Hard
Rock
Sand bit 1244444
Durabit 2211444
Tuff bit 2111234
Steep Taper Tuff bit 4321124
Barracuda bit 2112344
Steep Taper bit 4321124
Hard Surface bit 2123444
Glacier bit 4443124
Rhino bit 4433113
Jetting assembly 4432123
Rockmaster 4432111
Talon Rock bit 4321114
- Operator’s 1
- Overview 2
- Serial Number Location 3
- Intended Use 4
- Equipment Modification 4
- Unit Components 5
- Operator Orientation 6
- About This Manual 6
- Foreword 8
- JT922 Tier 4i 9
- Operator’s Manual 9
- Contents 10
- Chapter Contents 12
- Guidelines 13
- Safety Alert Classifications 14
- Safety Alerts 15
- Emergency Procedures 18
- If a Gas Line is Damaged 20
- If Machine Catches on Fire 21
- Controls 22
- Set-Up Console 23
- Left Control Console 25
- Gauge Cluster 27
- Right Control Console 31
- Anchoring System Console 32
- Seat/Armrest 34
- 750/752 Display 39
- Operation Overview 46
- Planning 47
- Setting Up at Jobsite 47
- Drilling 47
- Backreaming 48
- Leaving Jobsite 48
- Storing Equipment 48
- Gather Information 52
- Inspect Site 53
- Manual Prepare - 53 54
- Select Start and End Points 54
- Classify Jobsite 55
- Manual Prepare - 55 56
- Apply Precautions 56
- Other Jobsite Precautions 57
- Plan Bore Path 58
- Recommended Bend Limits 59
- Manual Prepare - 59 60
- Entry Pitch 61
- Minimum Setback 61
- Manual Prepare - 61 62
- Minimum Depth 62
- Bore Path Calculator 62
- Prepare Jobsite 63
- Check Supplies 64
- Manual Prepare - 63 64
- Prepare Equipment 65
- Assemble Accessories 65
- Start Unit 67
- Steer Unit 67
- Shut Down Unit 68
- Transport 70
- Tie Down 72
- Conduct a Bore 76
- Position Equipment 78
- Start System 78
- Prime Drilling Fluid Pump 78
- Operate Carriage Control 79
- Clamp Pipe 80
- Assemble Drill String 81
- Connect Drill Pipe 82
- Drill First Pipe 83
- Add Pipe 84
- Correct Direction 85
- Record Bore Path 86
- Surface Drill Head 87
- Assemble Backream String 88
- Remove Pipe 90
- Remove Pullback Device 91
- Systems and Equipment 92
- Anchor System 94
- Drive Anchors 95
- Remove Anchors 95
- Electric Strike System 96
- Assemble Voltage Detector 97
- Test Strike System 97
- Troubleshoot Strike System 98
- Use Electric Strike Simulator 100
- JT922 Operator’s Manual 101
- Drilling Fluid 102
- Bentonite 103
- Mixtures 103
- Basic Fluid Recipes 104
- Drilling Fluid Requirements 105
- Funnel Viscosity 106
- Tracker Control 107
- Downhole Tools 110
- Beacon Housings 111
- Backreamers 112
- Backream Fluid Requirements 113
- Quick Wrench 115
- Drill Pipe 117
- Use Caps and Plugs 118
- Replace Worn Saver Sub 118
- Rotate Pipe Order 118
- Use Drill Pipe Correctly 119
- Do not Overwork the Pipe 120
- Complete the Job 122
- Antifreeze Drilling Unit 123
- Reclaim Antifreeze 124
- Rinse Equipment 125
- Disconnect 126
- Stow Tools 126
- Service Precautions 129
- Opening/Closing Front Hood 130
- Engine Oil Temperature Chart 132
- Approved Fuel 132
- Startup/10 Hour 133
- Check Engine Oil Level 134
- Check Hydraulic Hoses 134
- (Optional) 136
- Clean Drilling Fluid Filter 136
- 50 Hour 137
- Check Oil Cooler 138
- 250 Hour 141
- 500 Hour 142
- 750 Hour 144
- 1000 Hour 145
- As Needed 146
- Drilling Unit 147
- Change Air Filter 148
- Check Saver Sub 148
- Specifications 150
- Procedure 154
- Resources 154
- Warranty 155
- Service Record 158
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