Jacobsen Hauler 800, Owner'S Manual And Service Manual, Page: 24 / 64

OPERATION AND SERVICE INFORMATION
Page 8
Owner’s Manual and Service Guide
Read all of manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notes, Cautions and Warnings
Always bring the vehicle to a complete stop
before shifting the direction selector.
Do not take vehicle out of ‘gear’ while in motion
(coast).
Check the area behind the vehicle before operat-
ing in reverse.
All occupants must be seated. Keep entire body
inside vehicle and hold on while vehicle is in
motion
PRECISION DRIVE SYSTEM
™
Precision Drive System™ (PDS) vehicles are operated in
one of four modes or “performance options”. All options
have standard features that control, protect and diagnose
the vehicle.
PDS vehicles operate only when the Run -
Tow/Maintenance switch is in the ’RUN’ posi-
tion. (Ref. Fig. 8 on page 4)
Performance Options
The options are defined as follows:
1. The No Plug performance option: The vehicle’s top
speed is sensed and regulated directly by the control-
ler and the pedal-up braking is at the strongest level.
2. The Blue Plug performance option: The vehicle’s top
speed is sensed and regulated directly by the control-
ler and the pedal-up braking feel is milder.
3. The Yellow Plug performance option: The vehicle’s
top speed is sensed and regulated directly by the
controller and the pedal-up braking is at the strongest
level.
4. The Red Plug performance option: The vehicle’s top
speed is sensed and regulated directly by the control-
ler and the pedal-up braking feel is milder.
The vehicle performance option can be determined by
placing the vehicle in diagnostic mode. See Technician’s
Repair and Service Manual. The number of beeps heard
immediately after entering diagnostic mode corresponds
to the above option numbers.
Regenerative Braking
To prevent the possibili-
ty of loss of control that
could cause severe inju-
ry or death, use service brake to control speed. The
PDS system is not a substitute for the service brake.
PDS models are equipped with a regenerative motor
control system.
Example: If all of the following events occur...
a) the vehicle is being driven down a slope
b) the vehicle attempts to exceed the specified top
speed with the accelerator pedal depressed or
released
the regenerative braking will limit the speed of the vehicle
to the specified top speed (the warning beeper will not
sound). When the regenerative braking system is acti-
vated by this sequence of events, the motor generates
power which is returned to the batteries.
If the operator attempts to override the regenerative
braking feature by moving the direction selector or key
switch to another position, the warning beeper will sound
and the vehicle will brake rapidly until it reaches the
speed of approximately 2 mph (3 kph).
Pedal-Up Braking
Pedal-up braking is regenerative braking that occurs
when the accelerator pedal is released while the vehicle
is moving between 8 mph (13 kph) and the vehicle’s top
speed.
Example: If all of the following events occur...
a) the vehicle is being driven down a slope
b) the accelerator pedal is released for more than
one second
the pedal-up braking will slow the vehicle (the warning
beeper will not sound) until either the vehicle speed is
reduced to 8 mph (13 kph), at which it freely coasts
between 8 and 3 mph (5 kph), or the accelerator pedal is
applied. When pedal-up braking system is activated by
this sequence of events, the motor generates power
which is returned to the batteries.
Performance Option Top Speed
Pedal-Up
Braking Strength
1. No Plug
13.5 mph
(22 kph)
Heavy
2. Blue Plug
13.5 mph
(22 kph)
Mild
3. Yellow Plug
15 mph
(24 kph)
Heavy
4. Red Plug
15 mph
(24 kph)
Mild
Fig. 16 Performance Options
! !