Jump Starting Procedure; Tcm (Tractor Control Module) Explanation; Replacing Fuses (Power Relay Module) - Ventrac 4500K Operator's Manual

Jump Starting Procedure

DANGER
The battery produces a fl ammable and explosive
gas. The battery may explode.
• Wear eye protection and gloves.
• Do not jump start a cold or frozen battery. Allow
the battery to warm up and inspect for cracks
or damage.
• Do not jump start a cracked or damaged battery.
• Do not attempt to jump start the power unit
using a battery of a different voltage.
1. Inspect the discharged battery for terminal corro-
sion and loose connections. Clean terminals and
tighten connections prior to jump starting.
2. Make sure the vehicle used to jump start the
power unit has a 12 volt, negative ground, elec-
trical system.
3. Pull the boosting vehicle up close to the disabled
power unit. Be sure the vehicles do not touch.
4. Shut off the boosting vehicle's engine and set
the parking brake.
Attempting to start the disabled unit with the
boosting vehicle's engine running could cause
damage to the regulator.
2
1
A. Discharged Battery
B. Booster Battery
5. Connect one end of the positive (+) booster cable
to the discharged battery's positive (+) terminal (1).
6. Connect the other end of the positive (+)
booster cable to the booster battery's positive
(+) terminal (2).
7. Connect the negative (-) booster cable to the
CAUTION
B
3
A
C. Ground Stud
SERVICE
booster battery's negative (-) terminal (3).
8. Connect the other end of the negative (-) booster
cable to the disabled power unit's ground stud (4).
9. Start the disabled power unit and remove the
booster cables in reverse order of installation
(negative booster cable fi rst).

TCM (Tractor Control Module) Explanation

The Tractor Control
Module (A) is a
sealed computerized
device designed to
control the electronic
safety related
functions of this
tractor. Both solid
state and mechani-
cal components are
used to assure safe,
reliable operation of
this machine.
This TCM monitors the electronic circuits necessary
for the engine, starter, and PTO to function. These
"input" circuits include the PTO Switch, Neutral Switch,
Parking Brake Switch, Key Switch, Seat Switch, and
Generator Presence. The TCM is programmed to
allow the engine, starter, or PTO to operate only when
specifi c input criteria are satisfi ed. The engine, start,
and PTO are controlled by "outputs" from the TCM.
For additional information, refer to the TCM section
of the troubleshooting guide.

Replacing Fuses (Power Relay Module)

1. Park the power unit on a level surface.
2. Engage the parking brake and shut off the engine.
3. Remove the key from the ignition switch.
4. Turn the battery disconnect switch to the Off
position.
4
5. Tilt the seat forward and fasten in place with the
seat prop.
6. Remove the
sealed fuse cap
from the power
relay module.
C
7. Identify and pull
the defective
fuse from the
socket.
Position
Top (A)
Bottom (B)
Service - 49
Power Relay module (J-Case Fuse)
Fuse Circuit
50 amp Key Switch, TCM
50 amp Rear Fuse Panel Supply
A A
A A
B B