SkyTrak 8042 Service Manual - Manual (Page 839)

Electrical System
9.248 Model 8042, 10042, 10054 Legacy Rev. 10/03
9.14.19 Service Brake Switch
The service brake switch works in conjunction with the
Stabil-TRAK™ system. With the boom above 40°, the
transmission shifter in either forward or reverse, and the
service brake depressed, the Stabil-TRAK™ system
engages. If the Service Brake Switch is suspect in the
proper operation of the Stabil-TRAK™ system, refer to
Section 10.8, “Stabil-TRAK™ System Test.”
a. Service Brake Switch Removal
1. If the vehicle has one battery, disconnect the
negative (-) battery cable at the negative (-) battery
terminal (1).
If the vehicle has dual batteries, disconnect both
negative battery cables from both negative (-) battery
terminals (2).
2. Label and disconnect the cab harness electrical
connectors (3) from the service brake switch (4 or 7).
Note: If roadlight option is installed the brake switch (4)
will be longer and there will be more electrical connec-
tions made.
3. Loosen locknut (5) and remove switch dust cover (6).
Remove switch body (7).
b. Service Brake Switch Installation
1. Ensure that there is only one thread (8) showing
above the locknut (9) on the shaft of the switch
body (10).
2. Insert switch body (10) through the top of the service
brake switch bracket (11).
3. Thread the switch dust cover (12) onto the switch
body (10) until finger tight against the service brake
switch bracket (11).
4. Use a wrench and fully tighten the locknut (9)
against the service brake switch bracket (11). There
should now be approximately two or three threads
showing above the locknut.
5. Thread the bottom lip (13) of the switch plunger
through the hole in the bottom of the dust cover (12).
6. Connect the cab harness electrical connectors (3) to
the service brake switch (4 or 7) connectors.
7. If the vehicle has one battery, connect the
negative (-) battery cable to the negative (-) battery
terminal (1).
If the vehicle has dual batteries, connect both
negative battery cables to both negative (-) battery
terminals (2).
8. Adjust the brake switch. (Refer to Section 9.14.19, c.
“Service Brake Switch Adjustment.”)
MH4890
1
2
MH3521
3
4
5
6
7
MA10,0710
8
9
10
11
12
13