Adjusting the Free Speed

The AutoTrim valve is factory set to approximately 70% of full speed. To reduce the free speed, reduce the length of L. To increase the free speed, increase the length of L.

Adjust the length of L by turning the support ring (1).

On very hard joints (<30°) at low torque levels, further speed reduction might be necessary. When the tool is used only on soft joints, less or no speed reduction is needed.

The factory set length of L is depending on the tool size, see table.

AutoTrim Valve

Length of L (mm)

4250 1878 43

39.2 +/-0.1

4250 1878 90

39.2 +/-0.1

4250 1878 91

39.7 +/-0.1

4250 1878 92

40.2 +/-0.1

4250 1878 93

40.7 +/-0.1

4250 1878 94

40.3 +/-0.1

4250 1878 95

40.5 +/-0.1

4250 1878 97

39.2 +/-0.1

4250 1878 98

39.7 +/-0.1

4250 2675 91

40.5 +/-0.1

4250 2675 92

40.3 +/-0.1

4250 1878 50

38.7 +/-0.1

4250 1878 51

38.7 +/-0.1