TM 5-6675-348-13&P
Table 3-7. Blade Pro Motor Grader Control System Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
FAULT 3-8. HYDRAULIC CONTROL VALVES DO NOT RAISE OR LOWER IN AUTOMATIC MODE,
BUT BLADE OPERATES MANUALLY.
Step 1.
Check R/L Switches (1) for proper operation.
Put R/L Switches (1) in Auto position. If green automatic LED does not light,
replace R/L Switches (1).
If connectors are wet, the Remote Interface Box will be damaged.
Step 2.
Remove Hydraulic Valve Cable connector (3) to ensure it is clean, dry, and free from damage.
If Hydraulic Valve Cable connector (3) is damaged or broken, replace connectors.