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Reelmaster 3550−DPage 5 − 26Electrical System
Parking Brake Switch
The parking brake switch is a normally closed proximity
switch that is located on the control console (Fig. 25).
The sensing plate that opens the switch is the parking
brake lever.
When the parking brake is applied, the parking brake
lever is positioned near the target end of the parking
brake switch so the switch is opened. The parking brake
lever is moved away from the switch when the parking
brake is released causing the switch to close.
The TEC controller monitors the position of the parking
brake switch (open or closed). Using inputs from the
parking brake switch and other switches in the interlock
system, the TEC controller controls the energizing of the
fuel stop solenoid and fuel pump (see Table 3: Input
Conditions Required to Illuminate Diagnostic Display
Outputs in this chapter).
Testing
1. Park machine on level surface, lower cutting units,
stop engine, apply parking brake and remove key from
ignition switch.
2. Before disconnecting the parking brake switch for
testing, the switch and its circuit wiring should be tested
as a TEC electrical input using the Diagnostic Display
(see Diagnostic Display in this chapter). If input testing
verifies that the parking brake switch and circuit wiring
are functioning correctly, no further switch testing is nec-
essary. If, however, input testing determines that the
parking brake switch and circuit wiring are not function-
ing correctly, proceed with the following switch testing
procedure.
3. Remove cover from control panel to gain access to
parking brake switch.
4. Make sure that when the parking brake is applied,
the clearance between the brake lever and the end of
the parking brake switch switch is 0.250” (6.3 mm). If
necessary, adjust switch and return to step 4 in this pro-
cedure.
1. Control panel cover
2. Parking brake lever
3. Brake switch
4. Jam nut (2)
5. Lock washer (2)
Figure 25
1
2
4
4
5
5
3
13 to 17 ft−lb
(18 to 23 N−m
)
5. Make sure ignition switch is OFF and disconnect the
parking brake switch connector from machine wire har-
ness.
6. Verify that the machine wire harness connector ter-
minal for black wire is closed (continuity) to ground.
7. Turn ignition switch to the ON position (do not start
engine) and verify with a multimeter that machine wire
harness connector terminal for pink wire has system
voltage (12 VDC) present.
8. If black wire is closed to ground, and the pink wire
has system voltage present, replace parking brake
switch.
9. Make sure that there is 0.250” (6.3 mm) clearance
between the brake lever and the end of the parking
brake switch after switch installation is complete. Tight-
en brake switch jam nuts from 13 to 17 ft−lb (18 to 23
N−m).
10.Install cover to control panel.