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Pinpoint Test F: Steering System Drift/Pull/Wander

  1. F1 CHECK FOR TIRE PULL 
      WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • If equipped with fire suppression system, depower the system.
    • Rotate the front wheel and tire assemblies side-to-side. Refer to WHEELS AND TIRES .
    • Carry out a road test on a smooth, flat road.
    • Does the vehicle drift/pull? 
    • Yes  : If vehicle pulls in the opposite direction, GO to  F2.

      If vehicle pulls in original direction, GO to  F3.

    • No  : The concern has been corrected. If equipped with fire suppression system, GO to  F8.
  2. F2 ROTATE THE WHEEL AND TIRE ASSEMBLIES FRONT TO REAR 
    • Rotate the wheel and tire assemblies front to rear. Refer to WHEELS AND TIRES .
    • Carry out a road test on a smooth, flat road.
    • Does the vehicle drift/pull? 
    • Yes  : GO to  F3.
    • No  : The concern has been corrected. If equipped with fire suppression system, GO to  F8.
  3. F3 CHECK THE STEERING COLUMN INTERMEDIATE SHAFT 
    NOTE: Be sure to keep the clockspring centered when disconnecting the intermediate shaft. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Check the steering column and intermediate shaft for grounding.
    • Disconnect the steering column intermediate shaft at the steering column.
    • Inspect the steering column intermediate shaft U-joints for looseness or wear.
    • Are the steering column intermediate shaft U-joints OK? 
    • Yes  : GO to  F4.
    • No  : INSTALL a new steering column intermediate shaft. REFER to STEERING COLUMN . If equipped with fire suppression system, GO to  F8.
  4. F4 CHECK THE STEERING GEAR MOUNTING 
    • Check the steering gear mounts for looseness or wear.
    • Are the steering gear mounts OK? 
    • Yes  : GO to  F5.
    • No  : INSTALL new steering gear mounts. REFER to POWER STEERING . If equipped with fire suppression system, GO to  F8.
  5. F5 CHECK THE STEERING GEAR 
    • Carry out the Steering Gear Valve component test. Refer to COMPONENT TESTS .
    • Is the steering gear valve OK? 
    • Yes  : GO to  F6.
    • No  : REPAIR or INSTALL a new steering gear. REFER to POWER STEERING . If equipped with fire suppression system, GO to  F8.
  6. F6 CHECK THE SUSPENSION COMPONENTS 
  7. F7 CHECK THE WHEEL ALIGNMENT 
    NOTE: The vehicle will tend to pull toward the side with the least positive caster and the most positive camber.
    • Yes  : CHECK for correct frame alignments. REFER to FULL FRAME AND BODY MOUNTING . If equipped with fire suppression system, GO to  F8.
    • No  : ADJUST the alignment angles to specifications. DO NOT exceed the specifications. TEST the system for normal operation. If equipped with fire suppression system, GO to  F8.
  8. F8 REPOWER THE FIRE SUPPRESSION SYSTEM 
      WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • Verify that the fire suppression system is repowered. For additional information, refer to FIRE SUPPRESSION SYSTEM .
    • Is the fire suppression system repowered? 
    • Yes  : Fire suppression system repowering is complete.
    • No  : REFER to FIRE SUPPRESSION SYSTEM for fire suppression system depowering and repowering procedure.
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