TM 5-3805-248-10
ADVANCED OPERATION AND OPERATOR TIPS - CONTINUED
0006 00
OPERATOR ADJUSTMENTS - CONTINUED
2.
Cutting Depth (Loading) and Lift Height (Unloading) Adjustments.
a.
During loading operations, the cutting edge is typically 2-4 in. (5-10 cm) below the plane established by the tractor
wheels. The operator can lower the cutting edge 6 in. (15 cm) BELOW this plane.
b.
Gage the most efficient depth of cut by the depth of the router bits. Use this depth on successive passes.
c.
The deeper the cut, the coarser the material that will be lifted into the bowl.
d.
During unloading operations, the material's lift height is established by raising the cutting edge ABOVE the plane of
the tractor wheels. The higher the lift needed, the higher the cutting edge is placed. Typical lift height is 2-4 in. (5-10
cm).
3.
Travel Speed Adjustments.
When loading or unloading scraper, limit travel speed to 1st or 2nd gear. The operator must listen to engine and back
a.
off throttle and downshift as required to prevent engine from lugging down.
It is recommended that the novice operator operate in 1st gear with shallower cuts.
b.
The more experienced operator may operate in 2nd gear, to increase productivity.
c.
STRADDLE CUTTING
NOTE
Cutting edge is narrower than scraper bowl. Repeated cuttings within the same slot will result in bowl get-
ting jammed in slot. Minimum slot width should be about 1-1/2 machine width.
1.
Straddle cutting is a method of cutting successive passes of material, where each new cut straddles or overlaps the previ-
ous cut. The end result is efficient, progressive and smooth evacuation of soil. Straddle cutting ensures uniform loading of
the bowl.
2.
Straddle cut as follows:
NOTE
Since first and second cuts are in virgin soil, this operation is best suited for the more advanced operator. The
third cut can readily be made by the novice operator.
a.
Cut initial path at prescribed depth.
b.
Cut second path parallel to first cut, at a distance
less than distance between tires.
c.
On third cut, load ridge left between cuts 1 and 2, at
a depth BELOW previous cuts. This will leave a
new ridge.
d.
Repeat until desired depth of removal is achieved.
394-1650
0006 00-3
