Ditch Witch FX25 - Manual (Page 46)

FX25 Operator’s Manual
Vacuum and Pothole - 45
Determine Tank Fill Level
CMW
Determine Tank Fill Level
Use these reference charts to help determine how full of various materials the vacuum tank can be without
overloading trailer. Exceeding the maximum fill level will overload the trailer.
Never exceed the trailer capacity. You can exceed the vacuum tank lifting capacity if you drain the tank
down to the lifting capacity before lifting tank.
To use these charts, first select the appropriate table based on trailer and vacuum tank size. Next find the
material being excavated. If the material being excavated is not listed, find a material with similar density.
Then, determine the maximum fill level based on the amount of water in the water tank.
500-gal Vacuum Tank on T9S Trailer
IMPORTANT: For all materials, the vacuum tank should be no more than half full when lifting the tank.
Material Maximum Vacuum Tank
Fill Level
Water tank fill level full (80 gal) empty (0 gal)
wood chips (dry) 100% 100%
snow (dry) 100% 100%
water 95% 100%
light weight mud (8-10 lb/gal) 88% 100%
earth (dry, loose) 83% 95%
caliche 76% 87%
earth, loam 76% 87%
medium weight mud (10-12 lb/gal) 72% 83%
limestone (crushed) 62% 71%
asphalt 59% 68%
sand (dry) 59% 68%
earth (wet, excavated) 59% 68%
heavy weight mud (12-15 lb/gal) 59% 67%
gravel (dry) 58% 66%
shale, riprap 56% 65%
sand (wet) 46% 52%