ADVANCED OPERATION AND OPERATOR TIPS - CONTINUED
MACHINE SERVICES AND ADJUSTMENTS - CONTINUED
Cutting Edge Configuration Changes.
Determine most efficient configuration of scraper bowl cutting edge for material to be loaded and degree of grading
(1) Straight Edge. This is most suitable for finishing work or where shallower cuts are required.
(2) Straight Edge With Teeth. This is suitable for work where harder materials are encountered.
(3) Stinger Edge. This configuration will reduce work cycle time by allowing for a more aggressive material bite.
Working with a stinger edge is recommended only for the more experienced operator.
(4) Stinger Edge With Teeth. This configuration allows for the most aggressive material bite. Working with a stinger
edge with teeth is recommended only for the more experienced operator.
In general, the higher the penetration capability of cutting edge, the coarser the material that will be lifted into the
Notify Unit Maintenance to convert cutting edge to suitable configuration, in accordance with procedures in TM
Elevator Mouth Clearance Adjustment.
Notify Unit Maintenance to adjust elevator mouth clearance as required (TM 5-3800-205-23-2).
The elevator serves to cut up and mix materials excavated by the cutting edge. The clearance between the cutting
edge and the elevator flights may be adjusted.
The narrower the gap, the more the material being loaded will be reduced and mixed. If material to be loaded is heavy
or wet and loads into bowl in large chunks or sheets, narrowing the gap will break the soil into smaller pieces.
The factory-set clearance is suitable for most operating conditions.
Elevator mouth clearance is factory set to a maximum clearance of 6 in. (15.2 cm). There are four shims used to
achieve this setting.
Removing one shim reduces clearance by 0.50 in. (1.3 cm).
During construction of a horizontal surface, material removed will be used in an area that must be subse-
quently compacted to provide a hard, smooth base. Properly adjusted, the material deposited will be readily
compacted with a minimum of additional time and effort.
Prior to loading, the operator needs to know the disposition of the material removed during the cut, because this
affects how the machine is loaded and the adjustments the operator needs to make:
(1) If material removed is to be used to create a base for a horizontal surface, loading must be accomplished to pro-
duce an engineered material suitable for subsequent compaction.