SUBJECT: Loss of Correct Wheel Alignment

MODEL: Valiant/Chrysler – R to VJ/CJ Series
 

Investigations have been conducted into Field reports of repeated ‘loss of correct wheel alignment’ on Valiant and Chrysler models.  These investigations have indicated that failure to achieve the correct torque of 88 Nm (65 lbs./ft.) on the upper control arm cam bolts is the main cause of this problem. 

The ‘J’ Series Service Manual quotes the torque as 88 Nm (65 lbs./ft.) maximum thus implying that a lower torque is acceptable.  This is not correct,  the figure of 88 Nm (65 lbs./ft.) is a nominal figure. 

The required torque will not be achieved by normal use of a ring or open ended spanner.  The resultant ‘low’ torque on these bolts leads to loss of correct setting in a relatively short distance  (dependent on terrain,  in which vehicle operates.).  Torquing the bolts to the specified figure results in vehicle holding correct camber and caster under a wide variety of operating conditions. 

Correct cam bolt torque will be achieved by the following method: 

At completion of alignment,  tighten cam bolts using normal ring spanner.  Raise vehicle so that front wheels are clear of ground and using a normal 12 sided socket and torque wrench,  tighten cam bolts to the specified torque of 88 Nm (65 lbs./ft.) nominal. 
 
 

SUBJECT: Loss of Wheel Alignment – Upper Control Arm Reinforcement

MODEL: All Valiant
 

To overcome problems of loss of wheel alignment mainly experienced with vehicles operated under severe conditions or unsealed roads a running change adding reinforcement plates to the upper control arm brackets was made in late 1978.

In the event that repeat loss of wheel alignment is experienced and fatigue cracking of the front attachment tab of the upper control arm bracket is noticed,  on vehicle manufactured prior to the introduction of the reinforcement plate we recommend that the following corrective action is taken.
 

1. Remove the upper control arm from the upper control arm bracket  (refer page 2-2-9 of the CL Service Manual). 

 
2. Weld all existing cracks or failed welds on the upper control arm bracket.

 
3. Fabricate two reinforcements as shown in illustration below.

 
4. Install reinforcement on both sides of the vehicle and weld as shown in illustration below.  Clean up welded area and protect against corrosion using zinc rich primer and under body black.

 
5. Reinstall upper control arm using new cam bolts and nuts.

 
6. Measure and adjust vehicle height and wheel alignment.  Note: Correct torque of the cam bolt nuts to 88 Nm (65 lbs./ft.) is important to prevent loss of wheel alignment as the result of movement of the cam bolts.  It may be necessary to tighten the cam bolts using normal spanner then raise the wheels clear off the ground to provide clearance for the application of the torque wrench.