PROPEL ANTI-STALL CONTROL SYSTEM
SUBSECTION 1OC
B. If a low voltage is present, turn off the engine and in-
ELECTRICAL POWER TO ANTI-STALL MODULE TEST. The
anti-stall module is located under the gauge panel at the left
spect to be sure that the spacing between the magnetic
of the operator's seat. Access to the module is gained by re-
pulse pickup and the gear teeth is 0.010 0.005 inches.
moving the gauge console side panel. A manual override
C. If the low voltage condition continues, replace the
switch is located on top of the module. The manual mode of
magnetic pulse pickup.
operation is used during specific test procedures. To place
the module in the manual mode, move the switch away
from the operator. Move the switch back toward the oper-
PROPEL CONTROL STATION TEST. The servicing of the
ator to return the module to the anti-stall mode.
propel control station is limited to a resistance check of the
The anti-stall module contains solid state electronics,
electrical connector assembly. To test the propel control
therefore, servicing is limited to voltage checks at key pins
station, proceed as follows:
on the electrical connectors. The module is non-repairable
NOTE
and should be replaced if it malfunctions. To test the elec-
trical power to the anti-stall module, proceed as follows:
Do not attempt to remove the cover or reposition the
control lever
1. Disconnect the electrical cables from the pump control-
lers.
1. Turn off or otherwise remove the power to the propel
control station.
2. Disconnect the cables to the propel control station.
2. Disconnect the electrical cables from the propel control
3. Connect and verify battery power (24 to 28 volts) to the
station
anti-stall module junction J2, pins A (+), B (GND).
3. Establish the test setup shown in Figure 10C-2.
4. Using a voltmeter, measure the voltage across the spec-
ified electrical connector pins of the anti-stall module. The
4. Set the meter to the R x 1 scale, short the meter leads to-
voltage must be within the specification tolerances given in
gether and adjust the meter to zero ohms to insure that the
Table 1OC-2 with the engine running at approximately full
throttle and no load attached
Table 10C-2. Anti-Stall Module Voltages
Connector On
Switch
Voltage
Anti-Stall
Specification
Mode
Across Pins
Module
+24 to 28 VDC Anti-Stall
J3
D(+)
C(-)
J3
+24 to 28 VDC Manual
D(+)
C(-)
+24 to 28 VDC Manual
J4
D(+)
Ct-)
+24 to 28 VDC Anti-Stall
J4
D(+)
C(-1
5. If in the manual mode the voltage is not within the spec-
ified tolerance, the anti-stall module must be replaced.
6. If in the anti-stall mode the voltage is not withm the
specified tolerance, the magnetic pulse pickup must be
checked.
7. If all voltages check within specifications, proceed to the
Propel Controller Test.
MAGNETIC PULSE PICK-UP TEST. To test the magnetic
Figure 10C-2 Propel Control Station
pulse pick-up, proceed as follows.
1. Disconnect the cable which connects the magnetic
pulse pickup to the anti-stall module at junchon J1.
Perform the resistance checks per Table 10C-2
2. Using an ac voltmeter, measure the ac voltage across
pins A and B of the cable connected to the magnetic pulse
pickup.
NOTE
3. With the engine running at full speed, the voltage read-
ing must be 15 volts minimum or proceed as follows:
When connecting the test leads to the electrical con-
nector pins, care should be taken not to deflect or de-
A. Check the continuity of the cable, inspect and repair any
form the electrical connector pins.
damaged cable or solder the joints.
10C-4
