OPERATION TROUBLESHOOTING
3-129
2. Open cover (1) on the cab side of the engine hood.
3. Turn locknut (2) of the release valve counterclockwise to
loosen it, then turn grip (3) counterclockwise and open the
release valve.
4. Turn the starting switch ON.
5. Move the parking brake switch to the ON (a) position (actu-
ated), then move it to the OFF (b) position (released).
The parking brake is released.
6. To restore the function of the parking brake, turn grip (3) of
the release valve clockwise to close the release valve, then
turn locknut (2) clockwise to lock it.
Tightening torque
Grip (3): 25 ± 5 N²m (2.5 ± 0.5 kgf²m, 18.1 ± 3.6 lbft)
Locknut (2): 20 ± 5 N²m (2.0 ± 0.5 kgf²m, 14.5 ± 3.6 lbft)
7. Move the parking brake switch to the ON (a) position. The
parking brake is applied.
To release the parking brake again, repeat the procedure in
Steps 1 to 5.
REMARK
If the brake accumulator pressure is low, the parking brake warning lamp may not go out, or the alarm
buzzer may sound continuously. If this happens, go to the following section “METHOD OF RELEASING
MECHANICALLY ( 3-130 )“ and release the brake.
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