TB 9-5120-212-24
Figure 1. Torque Wrench - Adjustment Locations.
(1) If TI indication error is the same in both cw and ccw directions, adjust pointer of
TI dial indicator.
(2) If TI indication error is not the same in both directions, perform technique
of (3) through (10) below.
(3) Remove sealant from the four adjustment screws A, B, C, and D (fig. 1) on the
back of TI.
(4) Using appropriate size Allen wrench, back off screws A and B (fig. 1) at least
three turns.
(5) Adjust screw C (fig. 1) until a pressure reading is shown on dial indicator, then
back off screw until indication returns to 0.
(6) Check spacing between the reaction arm on sensing unit housing and reaction
ears. If reaction arm is not centered between ears, adjust screws C and D (fig. 1) until
sensor is centered.
(7) Turn screw A (fig. 1) inward until a pressure reading is shown on dial indicator
and then back off to 0 plus one-quarter additional turn.
(8) Turn screw B (fig. 1) inward until a pressure reading is shown on dial indicator
and back off to 0.
(9) Repeat a above and adjust screws B and C (fig. 1) slightly to bring TI indications
within tolerance.
(10) Reseal retaining screws with silicone rubber sealer. Repeat table 4.
(11) Operate crank cw to obtain an indication of 800 ft-lbs (1200 ft-lbs for models
DPT-2500 and DPT-2500R) on force/torque indicator.
for models DPT-2500 and DPT-2500R) on digital display.
NOTE
It should not be necessary to adjust internal ZERO (fig. 2 and
fig. 3) unless circuit board is repaired.