Install Guide Sled Dynamometer Hub Replacement Dynojet® Research Inc.
Contents Dynojet Sled Dynamometer Hub Replacement Be sure that you kit includes the following components. If there are parts missing, call Dynojet Research at (406) 388-5255.
Install Guide Dynojet Sled Dynamometer Hub Replacement The following steps will guide you through the replacement of the hubs on your sled dynamometer. Warning: Do Not remove the parts from the spline shaft. The hubs are setup and ready to install. Step 1 Remove the guards. Note: • Remove the track guard. • Loosen the button head cap screws on the guards. • Pull the guards off the arms.
Step 2 Remove the Sprocket Ends containing the old hubs. • Loosen the 1/2" x 41/2" bolts on the front end of the arms. • Remove the front bolts and swing the arms down. • Remove the rear bolts and remove the arms. Step 3 Place the new sprocket ends in the hanging chains.
Step 4 Attach the new sprocket ends to the dyno. • Put one 1/2" x 41/2" bolt with a 7/16” flat washer through each sprocket end and the rear hole in the dyno arms. Fasten loosely. Important: • Allow the sprocket ends to hang as in the picture below. • Pull the chains straight down and tightly against the hanging sprockets. • Swing both sprocket ends on the shaft up and put in the front 1/ " x 41/ " bolts with 7/ 2 2 16” flat washers.
• Use a 7/16” flat washer,1/2” lock washer and 1/2” locking nut on each bolt and snug down. • Rotate the shaft until it slides easily side to side. • Tighten all four bolts to 70 ft. lbs. • Make sure that the shaft still slides easily from side to side between the sprocket ends. • Remove the shaft. Step 5 Check chain alignment in plastic chain guides. Tap guides as needed (with a rubber hammer) to center them with the chain. Step 6 Replace the metal arm guards and the track guard.
Warning: When replacing the Outside Driver Hub, notice a punch mark on the edge of the hub. This punch mark should be directly opposite of the alignment hole in the Outside Driver. Be sure that when you install the new Outside Driver Hub and Outside Driver that these holes are directly opposite of each other. Improper alignment of the outside Driver Hub and Driver will not allow you to assemble the driver set correctly.
