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Note: If the brake screws require excessive tightening or frequent adjustment, follow the

steps outlined in the section, Replacing Brake Screws. The frequency of adjustment will

increase as the brake screws wear. While a week may be an appropriate span between

adjustments, a day or less is too frequent.

To Tighten

1. Use a 5mm Allen wrench to tighten both of the brake screws; with your ngertips, turn the wrench

clockwise until you feel the slightest of resistance.

2. Once you feel resistance, turn the brake screw 360° more at the shoulder joint and 270° more at the

elbow joint.

3. After tightening both brake screws, check for drifting by moving the arm and letting go. The arm should

stop when you stop moving it. If it continues to drift, tighten it in 90° adjustments and check again for

drifting.

4. Finally, tighten the brake screw at the shoulder joint an additional 360° and the brake screw at the

elbow joint an additional 90° to allow for brake wear.

Note: If you have a torque wrench, the recommended brake screw adjustment for the

Extension Arm is 97.4 lb-in (1100 Ncm) at the shoulder joint and 53 lb-in (600 Ncm) at the

Elbow joint.

To Loosen

1. Use a 5mm Allen wrench to loosen the brake screws, turning counterclockwise 90°.

2. Check for ease of movement. If it is still too dicult, loosen it 90° more and check again for ease of

movement.

7.3.2 Adjusting Spring Arm Tension

The Spring Arm tension controls the vertical (up and down) movement of the Spring Arm. It is located at the

elbow joint of the Spring Arm. To test the tension of the Spring Arm, push the light head toward the ceiling.

If it drifts down, increase the tension. Pull the light head toward the oor. If it rises, decrease the tension.

Note: The Spring Arm should always be parallel to the oor while adjusting the tension.

Stryker Visum User Manual

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