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TR–4
IN-VEHICLE INSPECTION
1. Turn the ignition switch to the "ON" position.
2. Check to see if the indicator will illuminate when the differ-
ential lock switch is turned on.
NOTE:
•
If not, check the indicator valve.
3. Turns off the differential lock switch.
4. Disconnect the pipe A. Then, Connect a MityVac to the
pipe A.
5. Start the engine.
6. Check to see if the MityVac indicates a negative pressure
while keeping the engine revolution speed at idling.
7. Connect the MityVac to the diaphragm with a suitable
pipe.
8. Set the MityVac to –200 mmHg manually.
9. Hold the negative pressure of the MityVac at –200 mmHg
for about 10 seconds.
NOTE:
•
If the diaphragm exhibits damage, deterioration and so
forth, the negative pressure will rapidly return to posi-
tive pressure.
10. Disconnect the pipe B.
11. Connect the MityVac to the pipe B.
12. Start the engine. Turns on the differential lock switch.
13. Check to see if the MityVac indicates a negative pressure
while keeping the engine revolution speed at idling.
14. Connect the MityVac to the diaphragm with a suitable
pipe.
15. Set the MityVac to –200 mmHg manually.
16. Hold the negative pressure of the MityVac at –200 mmHg
for about 10 seconds.
NOTE:
•
If the diaphragm exhibits damage, deterioration and so
forth, the negative pressure will rapidly return to posi-
tive pressure.
Pipe A
Pipe A
Pipe B
JTR00010-00201
JTR00011-00202
JTR00012-00203
JTR00013-00204
JTR00014-00205
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