Dynojet 424 Linx: DWRT Installation Guide - Manual (Page 35)

4 2 4 L I N X I N S T A L L A T I O N
Tension the Belt
Version 6 Linx Installation for Model 424 Automotive Dynamometers
31
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TENSION THE BELT
You will need the following part:
• 62100003 Tension Arm Assembly
Use the following instructions along with Figure 28 on page 32.
1
Verify the drum brakes are released.
The dyno wheel base should only be adjusted with the brakes released or the
Linx belt drive system disengaged.
2 Set the dyno to a wheelbase adjustment of 101-inches.
3 Measure 50.5-inches from the center of one of the drums. Mark this point on the
bridge tube closest to the belt.
4 Loosen the ACME lock nuts on the tensioner.
Note: Before tensioning the belt, the brakes must be released and the drums free
to turn.
5 Turn the ACME screws on the tensioner to tension the belt. Alternate sides to
keep the pulley aligned with the belt.
6 Once the belt has some tension, place the tension arm centered on the mark.
Verify the angle is completely seated on the underside of the tube.
7 Place two weights on the tension arm with the outer weight flush with the end of
the arm. If the weights want to slip off of the bar, tension the belt more before
putting the weights on.
Note: Use the weights included in the Eddy Current Brake calibration set.
8 With the weights placed on the bar, tension the belt until the tension bar is
horizontal.
9 Place a straight edge on the side of the tensioner pulley so it runs parallel to the
belt. Verify the distance between the straight edge and the edge of the belt is even.
Adjust this distance by turning one of the ACME screws if necessary.
10 Tighten the lock nuts.
11 Remove the weights and the tension arm.
12 Recheck the belt tension after the first several dyno runs and occasionally after
that.