Manual Transmission; Description; Theory Of Operation; Maintenance - Manitowoc Grove TMS700E Service And Maintenance Manual

POWER TRAIN

MANUAL TRANSMISSION

Description

The transmission is a manual transmission. It has a gearshift
and a clutch pedal in the carrier cab. Refer to the Operator
Manual for operation instructions.
The transmission provides 11 forward speeds and three
reverse speeds. The transmission has a five speed front
section and a three speed auxiliary section. The auxiliary
section contains the low and high range ratios, plus the three
deep reduction gears. The range switch is used once during
an upshift sequence and once during a downshift sequence.
Deep reduction ratios are selected using the deep reduction
button on the gear shift.

Theory of Operation

One ratio in the front section is used only in low range as a
starting gear. The remaining four ratios in the front section
are used once through the reduction (low) gear in the range
section and once through direct (high) in the range section.
The twin countershaft design splits torque evenly between
two countershafts, reducing gear tooth pressure and wear.
The floating mainshaft gears of this design eliminate gear
bushings and sleeves as gears float between mating gears
on the countershafts.

Maintenance

Troubleshooting
Before attempting to determine a cause of transmission
noise or trouble, note what position the gearshift lever is in
Table 7-3
SYMPTOM
1. Noise (from other
sources).
7-42
PROBABLE CAUSE
a. Fan bent or out of balance.
b. Damaged vibration damper.
c. Flywheel out of balance.
d. Unbalanced clutch assembly.
e. Loose engine mountings.
f. Worn U-joints.
Published 01-29-2015, Control # 512-01
TMS700E SERVICE MANUAL
when the trouble occurs. If the noise is evident in only one
gear position, the cause of the trouble is generally traceable
to the gears in operation. There are times, however, due to
abnormal conditions in other parts of the crane, when noises
are transmitted from the engine, power train, frame, or body
to the transmission and will appear to originate there. All
such sources should be checked out before removing and
disassembling the transmission.
Another source of trouble could be a faulty air system or in
the actuating parts of the transmission's shifting bar housing.
This will be noticed when the transmission fails to make a
range shift, or shifts too slowly.
Diagnostics
NOTE: Refer to the
Troubleshooting Guide on the Roadranger web site
for diagnostic procedures. If these cannot be
retrieved, contact your distributor or Manitowoc
Crane Care.
If there is a problem with the transmission, the operator
should do the following:
1. Verify there is enough fluid in the transmission and there
is no damage to the transmission and lines.
2. Note the driving condition under which the problem
occurred.
3. Note the condition of the transmission under which the
problem occurred (i.e. direction, range, and gear) and
engine speed.
4. Contact a service facility to have the vehicle and
transmission system evaluated.
a. Replace fan.
b. Replace damper.
c. Check balance. Replace flywheel if
necessary.
d. Check clutch and clutch housing for
proper alignment.
e. Tighten mountings.
f. Replace U-joints.
Eaton Manual Transmission
SOLUTION