TM 5-6675-348-13&P
b.
Setup for Scraper.
(1)
Place cutting edge (1) on
benchmark.
(2)
If finished grade is benchmark
elevation, move RT2S Laser
Receiver (2) up/down on Scraper
Rigid Mast (3), adjust until
ON-GRADE symbol (4) (solid
green bar) appears on DR2
Display (5).
NOTE
Moving the RT2S Laser
Receiver (2) up on the Scraper
Rigid Mast (3) lowers the blade
cutting edge. Moving the RT2S
Laser Receiver (2) down on the
Scraper Rigid Mast (3) raises
the blade cutting edge.
(3)
If finished grade is below
benchmark elevation, raise
RT2S Laser Receiver (2) on
Scraper Rigid Mast (3).
Example: If the final grade is
2 in. (5.1 cm) below benchmark, raise RT2S Laser Receiver 2 in. (5.1 cm).
(4)
Secure RT2S Laser Receiver (2) by rotating RT2S Laser Receiver (2) Adjusting Knob (6) clockwise.
(5)
After making a short pass, check grade with 1275 Laser Receiver (7) on Grade Rod (8) (Refer to
Chapter 5). Adjust machine-mounted RT2S Laser Receiver (2) up/down on Scraper Rigid Mast (3)
to desired grade, if needed.
The RT2S Laser Receiver determines if cutting edge is too high, too low, or on grade in relation to the
benchmark. When the RT2S Laser Receiver transmits the grade information to the DR2 Display, the DR2
Display shows the Operator which direction the cutting edge should be adjusted (raised/lowered), if needed.
Ideal grade indication to maintain during normal operation is flashing yellow high (down) arrow, or flashing
(green) On-Grade Bar. It is not desirable to cut below grade.
During Gradio Display System operations using the RT2S Laser Receiver, watch the DR2 Display and
operate the Dozer or Scraper normally.
Grade Indicator Lamp
Correction Indicated
Distance from Grade
Solid High Arrow
Coarse Lower
0.11 to 0.28 ft (0.03 to 0.09 m)
Flashing High Arrow
Fine Lower
0.015 to 0.11 ft (0.005 to 0.03 m)
Flashing On-Grade Bar
None
0.015 ft (0.005 m)
Flashing Low Arrow
Fine Raise
0.015 to 0.11 ft (0.005 to 0.03 m)
Solid Low Arrow
Coarse Raise
0.11 to 0.28 ft (0.03 to 0.09 m)
