Norton C3120 Owner's Manual page 41

1. Remove the Hydraulic Pump Cover from the console.
2. Locate the Check Valve Adjusting Screw as shown below:
Check Valve
Adjusting Screw
3. Turn the Check Valve Adjusting Screw clockwise to increase the raise
speed and counterclockwise to decrease the raise speed.
4. Replace the Hydraulic Pump Cover.
The lowering speed can be adjusted as follows: NOTES: If the machine
will not lower check to see if the Depth Lock has been activated. For
additional information on the Depth Lock see the section Depth Lock on
page 22.
1. Remove the Hydraulic Pump Cover from the console.
2. Located the Inline Flow Control Valve as shown in the picture below.
NOTE: The Inline Flow Control Valve only affects the lowering speed
not the raise speed.
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