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5-130 MISCELLANEOUS CONTROLS AND OPTIONS
1
R
2
Double "H" gearshift pattern
(1) How to range change group(ZF16S-151 T/M)
Double "H" gearshift pattern provides 8 forward gearshifts and reverse gearshift. The neutral
position of gearshift lever is obtained on the shaft for the 3rd and 4th gears in LOW RANGE,
while it is on the shaft for the 5th and 6th gears in HIGH RANGE. Namely, there are two neutral
positions available. Therefore, when changing gears from high range to low range or vice versa, it
is necessary to quickly change gears so that the engine speed may not be reduced abruptly. In
addition, as the reverse gear is of dog clutch type, when attempting to change to reverse gear,
do so after the vehicle is stopped completely. Otherwise, gears may be damaged.
If gears are abruptly changed to low range at high engine rpm, or especially, when gears are
changed abruptly from high range to low range, damage may be caused to the clutch, engine,
or transmission.
Low range control system
The transmission is equipped with a low range
control system designed to protect the engine. If
you change gears from high range to low range
by toggling down the range change switch when
your vehicle speed is 25km/h or over, the vehicle
speed is reduced enough to prevent the inside of
the transmis- sion from changing to low range
until the engine is no longer affected adversely.
https://www.truck-manuals.net/
3
5
7
N
N
4
6
8
MTF0300
MTF0301
4) Operation
As ZF transmission is of synchro mesh change
gear type, gear shifting can be performed with no
need to use double clutch, and so it is very easy to
manipulate it.
(2) How to range change group(ZF16S-221 T/M)
Single "H" gearshift provides 8 forward gear-
shifts and reverse gearshift. The neutral posi-
tion of gearshift lever is obtained on the shaft
for either the 3rd and 4th gears or the 7th and
8th gears. Changing gears from high range to
low range or vice versa can be made by actu-
ating the range change switch.
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Troubleshooting
