TM 5-3895-383-10
Operation Section
4-39
Operating Techniques
Operating Techniques
Operating Technique Information
SMCS Code: 7000
Operate the engine at full rpm for maximum
braking, steering and propel control response.
Operation below full throttle will adversely affect
response.
When climbing a steep grade, the propel control
lever must be moved SLOWLY in order to avoid
engine stall and possible loss of machine control.
NOTICE
Release the parking brake before operating the
machine. Failure to release the parking brake
before operating the machine will damage the
parking brake and could result in a runaway
machine.
Attain the desired travel speed before you engage the
vibratory system. In order to achieve optimum
compaction, low range should be used.
Avoid using the leveling blade (if equipped) as a plow
or as a digging device. Machine damage can occur.
Stop the vibration system when you travel over
concrete or pavement that is hard.
NOTICE
The bearings in the vibratory reservoir for the
weight shaft are lubricated by rotating the drum
assembly. Turning the vibratory system on with the
machine not propelling may shorten the vibratory
bearing life.
Begin the first pass of the compaction along the side of
the work. Gradually make subsequent passes toward
the center. Overlap the previous pass by 200 mm (7.87
inch) in order to eliminate uncompacted areas.
NOTICE
Before changing the vibratory amplitude selection,
the system must be completely stopped.
Vibratory Operation
High Amplitude
In order to increase the total dynamic force of the
vibration cycle, place the vibratory system in high
amplitude. In order to increase the height of the drum
movement, place the vibratory system in high
amplitude.
High amplitude is used in the following situations:
In order to meet the requirements of density, the
job site requires higher compacting force.
In order to compact material with a depth of 254
mm (10.0 inch) or more, use high amplitude.
NOTE: Once you have achieved the desired density of
the material, high amplitude can cause the
material to break down.
NOTE: Every job site is different due to the various
conditions of the soil. Moisture content and the
type of material vary from job site to job site. In
order to determine the amplitude that is
needed, establishing a test location at each job
site is recommended.
Illustration 54
1. In order to place the vibratory system in high
amplitude, rock the vibratory control (2) rearward.
2. Move the propel lever to the FWD position or the
REV position.
3. Start the vibratory system by pressing the vibratory
on/off control (1). The control is located on the top
of the propel lever.
