Operations - Eaton TRSM0515 Service Manual

OPERATION
SHIFTING THE
S P E E D R O A D R A N G E R T R A N S M I S S I O N
10
RT-661O SERIES
General Instructions
The 10-speed Roadranger Transmissions provide
ten selective ratios, evenly and progressively spac-
ed and shifted with one lever. But you do NOT shift
the Roadranger as you would a conventional
transmission with an auxiliary or 2-speed axle,
because there is no split-shifting.
The shifting of the 10-speed Roadranger Trans-
missions is much simpler.. much easier,
ALL SHIFTS ARE MADE WITH ONE LEVER . . .
you use the RANGE CONTROL BUTTON ONE
TIME ONLY during a sequence of up-shifts . . .and
ONE TIME ONLY during a down-shift pattern.
Why is the Roadranger different?
The Roadranger is a 2-RANGE transmission con-
sisting of a5-speed front section and an automatic
2-speed auxiliary section in ONE CASE. The ten
forward speeds are secured by using a 5-speed
shifting pattern TWICE–the first time with the
transmission engaged in Iow gear or low range; the
second time engaged in high gear or high range.
By using the same shifting pattern twice, the
A shift diagram should be in your vehicle. If your shift diagram has been misplaced, write
to Service Department, Eaton Corporation, Transmission Division, Kalamazoo, Michigan,
for replacement. Please specify model number of transmission.
shift lever position for 6th speed is the same as
lst...7th the same as 2nd, 8th the same as 3rd, 9th
the same as 4th, and 10th the same as 5th.
Detailed Shifting Instructions
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.
Upshifting
To get to high range
pull button UP while
in 5th speed, then
move lever to 6th
speed.
Let's step into the cab.
1. Move the gear shift
lever to the neutral posi-
tion.
2. Start the engine.
3. Wait for air system to reach normal line
pressure.
4. Now look at the Range Control Button. If it is up
push it to the down position. (With the downward
movement of the button, the transmission will
shift into low range.) If the button was down when
the truck was last used, the transmission is
already in low range.
5. Now start the vehicle and shift progressively
through 1st, 2nd, 3rd and 4th to 5th.
6. When is 5th and ready for the next upward shift,
PULL the Range Control Button UP and move the
lever to 6th speed. As the Iever passes through the
neutral position, the transmission will automati-
cally shift from low range to high range.
7. With the transmission in high range, you may
now shift progressively through 7th, 8th and 9th to
10th.
Driving tip: always start vehicle moving in first
speed gear.