Step 3. Adjusting Your Truss Rod

 Adjusting Your Truss Rod

       The purpose of the truss rod is to counteract the tension placed on the neck by the strings. This tension can be affected by movement of the wood from environmental influences like temperature and humidity. 

To adjust your truss rod:

check your tuning, 
then install a capo at the 1st fret, 
depress the 6th string at the last fret.
With your feeler gauge,
check the gap between the bottom of the string and the top of the 8th fret - the measurement should be approximately .010".

Adjustment at headstock (Allen wrench):

If neck is too concave, 
(the guitar in playing position, 
looking up the neck towards the keys) turn the truss-rod 
nut counter clock-wise. Too convex—clockwise.




                  Adjustment at neck joint (Phillips screwdriver): 

If neck is too concave, 
turn the truss-rod nut clock-wise. Too convex—Counter clockwise.
Check your tuning, 
then check the gap again with the feeler gauge. 
In either case, if you meet excessive resistance or need
for adjustment, 
or you’re not comfortable with this adjustment,
take your guitar to your authorized Service Center.