Jacobsen SLF 1880, Technical/Repair Manual

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2C-6
NEUTRAL AND REVERSE SENSING
SWITCHES
Neutral Switch
The traction pedal is designed to return to neutral
whenever the forward or reverse foot pedals are
released. If the tractor continues to creep after the trac-
tion pedal is released, check the neutral adjustments
and adjust the traction pedal linkage (Figure 2C-2).
1. Disconnect the pump linkage from the traction
pedal.
2. Check the position of the return arm on the drive
pump. The pointer on arm should be centered in
the sensing area of the switch.
3. Adjust the pointer by loosening the jam nut and
turning the adjustment screw while holding the
adjustment nut.
4. Add or remove shims as needed to obtain correct
air gap between switch sensing surface and
pointer arm (Figure 2C-2).
• Magnetic Switch - 0.098 to 0.125 in. (2.5 to 3 mm).
• Digital (Orange) Switch - 0.125 to 0.157 in. (3 to 4
mm).
5. Tighten jam nut against adjusting nut.
6. Connect the pump linkage to the traction pedal.
7. Check the Interlock system and operation of trac-
tion pedal after adjustment.
4WD Reverse Sensing Switch
A four-wheel drive reverse sensing switch is included
on machines equipped with four-wheel drive. The
switch stops four-wheel drive operation when the
machine is placed in reverse or neutral. The switch is
located on the same mounting bracket as the neutral
switch (Figure 2C-2).
1. Loosen the switch mounting screws.
2. While in neutral, adjust the switch as required to
position the sensing area under the return arm as
shown.
3. Add or remove shims as needed to obtain correct
air gap between switch sensing surface and pio-
nter. (Figure 2C-2).
• Magnetic Switch - 0.098 to 0.125 in. (2.5 to 3 mm).
• Digital (Orange) Switch - 0.125 to 0.157 in. (3 to 4
mm).
Figure 2C-2. Neutral and 4WD Reverse Sensing Switches
NOTICE
The neutral switch forms part of the interlock system
and senses when the traction pedal is in neutral. If
the Interlock system fails to operate properly, check
and replace the switch before operating the tractor.
Neutral
Switch
Pointer
Locknut
Adjusting
Nut
4WD Cut-Out
Switch