Table 4-2. Unit Troubleshooting - Continued
TEST OR INSPECTION
AIR SYSTEM/BRAKES - Continued
ANY AIR RESERVOIR PRESSURE LOW
Check reservoir drain valve closed.
Close drain valve.
Check for leaks from reservoir.
Repair hoses/connectors (see para 4-147).
Replace tank (see para 4-157).
heck pressure protection valves for correct operation.
Replace as required (see para 4-153).
STEERING HARD IN ONE OR BOTH DIRECTIONS
Check ambient air temperature.
Run engine for few minutes. Steering will be stiff at very low temperatures.
Check oil level.
Fill reservoir as required (see Chapter 3, Lubrication Instructions).
Check oil viscosity and/or oil cleanliness.
Drain system and refill with correct oil (see Chapter 3, Lubrication Instructions).
Check for binding in steering column or shaft.
Replace steering column or shaft U-joints (see para 4-160).
Notify Direct Support.