JT520 Operator’s Manual
Systems and Equipment - 105
Downhole Tools
CMW
Backream Fluid Requirements
Backreaming is only successful when enough fluid reaches the bore. The amount of fluid needed depends
on size of bore and soil condition.
Follow these steps to find the
minimum
amount of fluid needed in perfect conditions.
IMPORTANT:
Use more fluid than recommended or the backream might be dry and unsuccessful.
Instructions
Example
1.
Find amount of fluid needed for your size of
backreamer. See the table on the next page.
U.S.
A 6” backreamer requires at least 1.47
gal/ft.
Metric
A 152-mm backreamer requires at least
18.24 L/m.
2.
Multiply this number by distance per minute
you plan to backream. The answer is an
estimate of amount of fluid you will need for
each minute of backreaming.
U.S.
1.5 gal x 2 ft/min = 3 gal for each minute of
backreaming.
Metric
18 L x .5 m/min = 9 L for each minute of
backreaming
IMPORTANT:
After you have determined how much fluid you will need, see your Ditch Witch dealer for
nozzle recommendations.
Содержание JT520
Страница 1: ...JT520 Issue 1 1 Operator s Manual CMW 053 1219...
Страница 59: ...Prepare 58 JT520 Operator s Manual Check Supplies and Prepare Equipment CMW...
Страница 60: ...JT520 Operator s Manual Drive 59 CMW Drive Chapter Contents Start Unit 60 Steer Unit 60 Shut Down Unit 61...
Страница 63: ...Drive 62 JT520 Operator s Manual Shut Down Unit CMW...
Страница 71: ...Transport 70 JT520 Operator s Manual Tow CMW...
Страница 113: ...Systems and Equipment 112 JT520 Operator s Manual Drill Pipe CMW...
Страница 117: ...Complete the Job 116 JT520 Operator s Manual Stow Tools CMW...
Страница 132: ...JT520 Operator s Manual Service 131 150 Hour CMW 150 Hour Change Fuel Filter Change filter shown every 150 hours...
Страница 141: ...Service 140 JT520 Operator s Manual As Needed CMW...
Страница 145: ...Specifications 144 JT520 Operator s Manual CMW...
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Страница 150: ...JT520 Operator s Manual Service Record 149 CMW Service Record Service Performed Date Hours...
Страница 151: ...CMW Service Record 150 JT520 Operator s Manual Service Performed Date Hours...