Coleman HS400UTV-2 Owner's Manual page 52

4-27 Control Functions
Front and Rear Shock Adjustment(Option 1)
The spring preload can be adjusted to suit
the operating conditions.
You can reduce preload for a softer ride, or
increase preload if the vehicle is bottoming
out on rough terrain.
CAUTION:
Frequent or severe bottoming out can cause
increased wear or damage to the vehicle.
Adjust the spring preload as follows.
To increase the spring preload, turn the
adjusting ring in direction
To decrease the spring preload, turn the
adjusting ring in direction
.
.
1. Spring preload adjusting ring
2. Position indicator
NOTE:
A special wrench can be obtained at a
service center to make this adjustment.