Linear Tensioner Installation Instructions Roller Chain Drives

Mounting Requirements Before beginning the installation, review the following:

• Mounting bracket and supporting framework must be sturdy to prevent twisting under load.
• Mounting bracket and linear tensioner must be located to allow for correct alignment with the driveR and driveN sprockets.
• The linear tensioner should always be mounted on the slack side of the drive. See Fig. 1.
• A linear tensioner used on a chain drive should always be positioned on the outside of the chain. See Fig. 2. Note: If using the LT series and idler sprocket, at least three teeth must engage the chain.
• If possible, position the linear tensioner approximately 1/2, but no less than 1/3, of the center distance from the driveR sprocket.
• Never use a spring-loaded linear tensioner on a reversing drive.

Assembly Instructions

1. If you are using a CT series tensioner, continue to step 2; otherwise, mount the idler sprocket to the LT linear tensioner head.
2. Drill a hole in the mounting bracket, positioned to meet the above Mounting Requirements, corresponding to mounting bolt size outlined in Table 1.
3. Insert mounting bolt in linear tensioner body and into the mounting hole. See Fig. 1 and Fig. 2. Hand tighten only! Check the alignment with the driveR and driveN sprockets. Any misalignment must be corrected!
4. Determine the final mounting location, amount of travel, and necessary tightening force on the chain. See Table 1.
5. With the tensioner securely held into position, tighten the mounting fastener.
6. Compress the tensioner head to the desired amount of travel.
7. Place the chain over all of the sprockets.
8. Slowly release the force of the linear tensioner head until it contacts the chain.
9. Before starting the drive, recheck drive alignment and check all mounting fasteners for tightness.

Table 1. Tensioner Data

Note 1) All forces (lbs.) are nominal.