GROVE
3-55
TMS800E13 OPERATOR MANUAL
OPERATING CONTROLS AND PROCEDURES
3
Published 02-06-2014, Control # 495-00
the next shift demand and do not cause the engine to labor
with the next shift. Start the crane in the lowest gear
necessary and with the first few shifts, develop only the
engine speed (RPM) needed to get rolling. Then as you
upshift, increase crane speed in each gear with a
progressive increase in engine speed. It should seldom be
necessary to go to governed engine speed in the lower gears
except in a peak load situation, such as starting up a grade.
The biggest task when climbing a grade generally will be
maintaining a reasonable rate of speed. When possible,
preplan the climb and probable shift requirements according
to traffic conditions and grade to be climbed.
When approaching a hill, gradually move the throttle all the
way down, if necessary, to maintain governed engine speed
(RPM) and remain at full throttle as the crane starts up the
grade. If there is sufficient power to maintain satisfactory
road speed without the engine laboring, remain in that gear
for the entire grade. Whenever a grade proves too great for
the gear that you are in and the engine begins to labor, ease
off the throttle as necessary and allow speed to drop off to
the next lower shift point before downshifting to the next
gear. Speed usually drops off quickly while shifting so the
shift should be made rapidly. Additional downshifting should
be performed in the same way, as necessary. By riding each
gear down to the next shift point, you will get over your
grades in the best possible time with minimum shifts.
On downhill operation, the engine provides most efficient
braking when run at or near top engine speed in the
operating range, BUT REMEMBER, the governor has no
control over the engine speed when it is being pushed by a
heavy crane. When the engine exceeds the rated governed
engine speed while descending a grade or downshifting at
the high end of the operating range, engine overspeed can
result in serious damage. On downhill operation, use the
vehicle brakes and gears in combination to keep crane
speed under control and the engine below rated governed
engine speed.
The transmission has 11 forward speeds and three reverse,
consisting of a five speed front section and a three speed
auxiliary section. The auxiliary section contains low and high
range ratios, plus three deep reduction gears. The three
lowest (LL1, LO, LL2) gear sets are used for road speed
control and are not intended to be used as progressive shifts.
The other four ratios are used twice, once in low (LO) range
and once in high (HI) range.
As with any transmission gearing, shifting depends on
proper synchronization. Never try to force the gear lever.
During regular shifts, when moving the gear lever into the
next gear position for engagement, the lever should be held
lightly against the gear to be engaged. If gears are
synchronized, engagement will be made immediately. If not
synchronized, the flat gear teeth will rotate against each
other until synchronization is reached. Do not jerk the shift
lever into the next gear position or try to force gear
engagement. If gears are out of synchronization, no amount
of forc e is going to m ake the en gage ment be fore
synchronization.
All shifts are made with one lever and a Range Control
Button Figure 3-27 which is used only once during an upshift
sequence, and only once during a downshift sequence.
Always preselect the range shift. After preselection, the
transmission will automatically make the synchronizer range
shift as the shift lever passes through neutral.
In the following instructions, it is assumed that the driver is
familiar with motor trucks and tractors, and that he can
coordinate the necessary movements of the shift lever and
clutch pedal to make progressive and selective gear
engagements in either direction, up or down.
Initial Start-up
1.
Ensure the shift lever is in neutral and the parking brake
is set.
2.
Start the engine.
3.
Allow air pressure to build up.
4.
Apply the service brakes.
CAUTION
Before moving the crane, make sure you understand the
shift pattern configuration Figure 3-28.
DEEP REDUCTION BUTTON
RANGE
CONTROL
BUTTON
Forward
Rearward
for “OUT”
for “IN”
Up for HI Range
Down for LO Range
FIGURE 3-27
Содержание Grove TMS800E13
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