L I N X W I T H A T R A F L E X I N S T A L L A T I O N
Tension the Belt
Linx with Atra Flex Installation for Model 424 Automotive Dynamometers
42
TENSION THE BELT
The Linx belt drive system is designed for all-wheel drive vehicles. The Linx belt drive
system keeps the driving wheels of an all-wheel drive vehicle spinning at the same
speed to avoid driveline damage. When the Linx is used with two-wheel drive vehicles
to spin the non-driving wheels for the purpose of not throwing codes, extra attention
will be needed for the proper adjustment of the Linx belt.
Always monitor the front and rear drum speed with every vehicle tested.
When the drum speed starts to vary more than a couple of miles per hour,
belt adjustment is needed.
You will need the following part:
• 62100003
Tension Arm Assembly
Use the following instructions along with Figure 34 on page 43.
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.
Note:
Verify the belt is aligned and seated in the grooves on each pulley.
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.