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Graco LineLazer IV 3900 Series - Sensor Adjustment Procedures; Distance Sensor Gear Alignment; Distance Sensor Height Adjustment

Graco LineLazer IV 3900 Series
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311020 19
Trigger Sensor Adjustment
Refer to Troubleshooting for trigger sensor adjust-
ment, and see operation manual.
Distance Sensor Adjustment
Gear Alignment
1. Relieve pressure, page 7.
2. Fig. 14. Remove dust cap (142) from wheel.
Remove nut (127).
3. Remove wheel (120) from LineLazer.
4. Align gear (67) with sensor.
a. Pull gear out from wheel with gear puller.
b. Push gear in toward wheel with mallet.
5. Install wheel (120) on LineLazer .
6. Install nut (127) until tight, then back off 1/4 turn.
Install dust cap (142) on wheel.
Sensor Height Adjustment
1. Remove wheel (120) from LineLazer.
2. Remove distance sensor (66).
3. Adjust sensor assembly height with two 17 mm
nuts of sensor so bottom surface of sensor is
0.638 +/--0.020 from bottom surface of shield.
Torque to 8 +/-- 2 in-lb.
4. Reassemble distance sensor (66) and wheel (82).
Inside of tire
.638 in.
Tire
Distance
Sensor (66)
Gear (67)
Frame
Axle
ti6400a
Fig. 14
142
127
120
(120)
66
Distance Sensor Detail
Gear (67)

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