Matrix ULTRA Series Manuel utilisateur

Revised: March 2021 I Revised By: BNelson Page 1of 15

Strength Cable and Belt Guide

Keeping strength cables and belts tensioned properly is not part of the product warranty and

should be maintained by the facility. This document will walk you through how to properly

tension Matrix strength cables and belts and, also show you examples of damaged cables.

Cables can stretch over their life and should be checked WEEKLY for proper tension and

inspected for damage. Without proper tension, users will lose some range of motion and excess

wear to the cables can occur.

Table of Contents

(click a link to be directed to that instruction)

Cable Bolt Overview

Versa Series

Varsity Series

Checking for Proper Tension

Aura Series

Cable Cross & Functional Trainers

Ultra Series

Go Series

Identifying Damaged Cables & Components

Revised: March 2021 I Revised By: BNelson Page 2of 15

Cable Bolt Overview

Strength cables may have different size cable bolts that connect to the top plate or head plate adapter

on weight stacks. For this reason, it is important to follow these steps when tensioning cables to ensure

your cable has enough engagement to not be a safety concern.

Remove and measure the cable bolt. Measure from the top of the bolt head to the bottom of the bolt.

Remember the bolt length as you screw the bolt into the head plate adapter/sleeve (axle). A minimum

of ½” (13mm) must be engaged at all times.

Example: The bolt measures 2 ½” (63.5mm) in length (top of bolt head to bottom of threads). Attached

the cable bolt to the head plate adapter/sleeve (axle) by screwing it down so 2” (51mm) of the bolt is still

showing. From there you will check the tension of your cable. If the cable needs tension, you will screw

the bolt down giving it further engagement. If it is too tight and there is no other way to adjust tension

(see tensioning procedures in the following pages) you must replace the cable. Do not unscrew to reduce

the required ½” (13mm) of engagement.

Revised: March 2021 I Revised By: BNelson Page 3of 15

Checking for Proper Tension

Ultra, Versa, Aura, Go and Varsity Series Single Stations

Check for Proper Tension:

1. Unpin the weight stack pin from the stack

2. From the midway point of the cable bolt and top of weight stack, use your finger to move the

cable from side to side. You should see no more than ½” (13mm) of deflection (about the width

of your finger) before the top weight plate starts to move or you feel resistance from the cable

3. If you have more than ½” (13mm) of deflection, follow the tensioning procedure below

Cable Cross and Functional Trainers

Check for Proper Tension:

1. Proper tension should leave 20mm of clearance at the widest point on the pulley guard as

pictured below.

The following pages will outline tensioning procedures for each series/design.

Revised: March 2021 I Revised By: BNelson Page 4of 15

Ultra Series

Important: A minimum of ½” (13mm) of the cable bolt must be engaged into the head plate adapter

Cable Tensioning Procedure:

1. Unpin the weight stack pin from the stack

2. Remove the cable bolt from the head plate adapter

3. Turn down the cable bolt so ½” (13mm) of the bolt is engaged into the head plate adapter (see

image below)

4. Check cable tension. If you have no more than ½” (13mm) deflection the cable is tensioning

properly (see checking for proper tension procedure above)

•If you have too much deflection, turn the cable bolt down a few turns and check tension

again. Do this until proper deflection is achieved

5. Tighten jam nut down the cable bolt so it is tight to the head plate adapter. You must secure it

with a wrench. Finger tight is not good enough.

6. Use the weight stack pin and pin 50-60 lbs. then perform 5-7 reps to set/stretch the cable

7. Check for proper tension (see above)

8. Check to make sure the weight stack pin goes into each weight plate. If the pin touches the

bayonet, that is fine as long as the pin can be inserted completely.

•If not, loosen the jam nut on the cable bolt and turn out 1 thread then recheck

Note: Some 2018 and newer Ultra Series units may also have the top down tensioning shown for Versa

Revised: March 2021 I Revised By: BNelson Page 5of 15

Versa Series

Versa Series single stations use a ball end cable at the top of the weight stack. The cable is secured to

the head plate by a jam nut locking it in place. To adjust the cable tension, you must use the adjustment

on the lower part of the weight stack frame.

Cable Tensioning Procedure:

1. Loosen the two bolts circled in the picture below. Do not remove

2. Using a 6mm Allen socket, turn the adjuster bolt (shown with the arrow) down a few turns.

This will push the cable pulleys lower giving the cable tension

3. Check for proper tension

4. Tighten the bolts from Step 1 once the proper cable tension has been achieved

Revised: March 2021 I Revised By: BNelson Page 6of 15

Aura Series

The Aura Series was originally designed with a reinforced 15/16” flat Kevlar/urethane belt. Later, a line

extension was designed using cables. Belts and cables are NOT interchangeable.

Cables

Important: A minimum of ½” (13mm) of the cable bolt must be engaged into the head plate adapter

Cable Tensioning Procedure:

1. Unpin the weight stack pin from the stack

2. Remove the cable bolt from the head plate adapter

3. Turn down the cable bolt so ½” (13mm) of the bolt is engaged into the head plate adapter (see

image below)

4. Check cable tension. If you have no more than ½” (13mm) deflection the cable is tensioning

properly (see checking for proper tension procedure above)

•If you have too much deflection, turn the cable bolt down a few turns and check tension

again. Do this until proper deflection is achieved

5. Tighten jam nut down the cable bolt so it is tight to the head plate adapter. You must secure it

with a wrench. Finger tight is not good enough.

6. Use the weight stack pin and pin 50-60 lbs. then perform 5-7 reps to set/stretch the cable

7. Check for proper tension (see above)

8. Check to make sure the weight stack pin goes into each weight plate. If the pin touches the

bayonet, that is fine as long as the pin can be inserted completely.

•If not, loosen the jam nut on the cable bolt and turn out 1 thread then recheck.

Note: On some machines, such as the cable Leg Press, there will be additional adjustment at the opposite

side of the cable. Only adjust there if you run out of bolt threads above the weight stack.

Revised: March 2021 I Revised By: BNelson Page 7of 15

Aura Series

The Aura Series was originally designed with a reinforced 15/16” flat Kevlar/urethane belt. Later, a line

extension was designed using cables. Belts and cables are NOT interchangeable.

Belts

Belts should be tensioned if you notice the belt riding to one side of a pulley or if range of motion loose is

seen.

Belt Tensioning Procedure:

1. Loosen bolts on ‘fold over’ clamp or ‘barrel’ clamp

2. Using your hand, pull any slack out of the belt and using a pliers on the cut end of the belt,

pull to remove that slack

3. Tighten bolts using the instruction below

Note: It is recommended to leave three (3) squares of extra belt showing on the opposite side of the

clamp to give you something to grab onto when tensioning.

‘Fold over’ type clamp;

•Add Red Vibra-Tite thread locker to the 4 bolts threads then tighten to 5 N-m using a torque

wrench.

•The bolts should be tightened in a uniform pattern to ensure the clamp is applying consistent

pressure to the belt (see the image below). Tighten the 4 bolts a few turns each until the 5 N-

m torque is reached on each. Do not tighten 1 bolt all the way to 5 N-m before moving onto

the 2nd bolt, etc. Tighten a little to each bolt until 5 N-m is met.

‘Barrel’ type clamp;

•Add Red Vibra-Tite thread locker to the 2 bolts threads then tighten to 30 N-m using a torque

wrench. Like the fold over clamp, tighten each bolt a little at a time until proper torque is met.

Revised: March 2021 I Revised By: BNelson Page 8of 15

Go Series

Important: A minimum of ½” (13mm) of the cable bolt must be engaged into the head plate adapter

Cable Tensioning Procedure:

1. Unpin the weight stack pin from the stack

2. Remove the cable bolt from the head plate adapter

3. Turn down the cable bolt so ½” (13mm) of the bolt is engaged into the head plate adapter (see

image below)

4. Check cable tension. If you have no more than ½” (13mm) deflection the cable is tensioning

properly (see checking for proper tension procedure above)

•If you have too much deflection, turn the cable bolt down a few turns and check tension

again. Do this until proper deflection is achieved

5. Tighten jam nut down the cable bolt so it is tight to the head plate adapter. You must secure it

with a wrench. Finger tight is not good enough.

6. Use the weight stack pin and pin 50-60 lbs. then perform 5-7 reps to set/stretch the cable

7. Check for proper tension

9. Check to make sure the weight stack pin goes into each weight plate. If the pin touches the

bayonet, that is fine as long as the pin can be inserted completely.

•If not, loosen the jam nut on the cable bolt and turn out 1 thread then recheck

Revised: March 2021 I Revised By: BNelson Page 9of 15

Varsity Series

Varsity Series machines have two different cable attachment assemblies. One assembly has a cable bolt

that attaches to the head plate shown below. The second is a clamp style using a ball end cable (no bolt)

shown on the next page.

Important: A minimum of ½” (13mm) of the cable bolt must be engaged into the head plate adapter

Cable Bolt

Cable Tensioning Procedure:

1. Unpin the weight stack pin from the stack

2. Remove the cable bolt from the head plate adapter

3. Turn down the cable bolt so ½” (13mm) of the bolt is engaged into the head plate adapter (see

image below)

4. Check cable tension. If you have no more than ½” (13mm) deflection the cable is tensioning

properly (see checking for proper tension procedure above)

•If you have too much deflection, turn the cable bolt down a few turns and check tension

again. Do this until proper deflection is achieved

5. Tighten jam nut down the cable bolt so it is tight to the head plate adapter. You must secure it

with a wrench. Finger tight is not good enough.

6. Use the weight stack pin and pin 50-60 lbs. then perform 5-7 reps to set/stretch the cable

7. Check for proper tension (see above)

8. Check to make sure the weight stack pin goes into each weight plate. If the pin touches the

bayonet, that is fine as long as the pin can be inserted completely.

•If not, loosen the jam nut on the cable bolt and turn out 1 thread then recheck

Revised: March 2021 I Revised By: BNelson Page 10 of 15

Varsity Series

The machines using the cable clamp will have a ball end cable (above weight stack) with a cable stopper

at the user end of the cable. The cable tension for these machines is based on the cable stopper position

to the pulley.

Cable Clamp

Cable Tensioning Procedure:

1. Remove/loosen the clamp bolts from the clamp on top of the weight stack

2. Move the cable ball end to the middle adjustment slot and check the distance of the cable

stopper to the pulley

3. Check cable stopper position in relation to the pulley

4. Tighten the clamp bolts using a wrench

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