TM 5-3805-248-14&P-1
Hydraulic Retarder
Transmission Hold Pedal
Use the retarder to slow the machine, or
Use the transmission hold pedal to
prevent engine overspeed.
prevent undesired shifting of the
transmission.
CAUTION
Apply the transmission hold to prevent
upshifts while loading or dumping.
The retarder will not completely stop the
machine.
Slow the machine and depress the pedal, to
hold the transmission in low gear, before
Keep engine rpm under 2300.
starting down a grade.
Use the retarder on downgrades to
Hold the transmission in a lower gear to
prevent engine overspeed. It also helps
increase engine rpm when approaching an
prevent excessive heating and wear of
upgrade.
brakes.
In rough terrain it prevents continuous
Use the retarder when entering a cut or
upshifting and downshifting.
fill area to slow the machine. This will allow
the transmission to downshift. When the
The transmission hold pedal may be used
desired speed is reached, depress the
to skip gears for operator comfort, when
transmission hold pedal.
slowing to enter the cut or fill area. Skip
only one gear at a time. Do not skip
Use the retarder to help stop the machine,
gears below 5th
to save brakes and help prevent brake
overheating.
To skip a gear, push down the pedal.
Allow the ground speed to slow enough to
CAUTION
cause the transmission to downshift two
times. Release the pedal.
If continuous overheating of retarder oil is a
problem, use a lower transmission speed.
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