Ferris ISX800 Series Operator's Manual page 45

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The front shocks can be adjusted by changing the spring pre-
load.
The rear shocks can be adjusted by changing the spring
pre-load and/or the upper mounting position. Some units
feature two (2) upper shock mounting positions and some
units feature three (3) upper shock mounting positions.
A spanner wrench (B) was included with the literature packet
that came with this unit. There are two ends on it. The smaller
end is used on the front shock and the larger end is used on
the rear shock.
Items to consider before adjusting the suspension:
• Less spring pre-load should be used with light weight
operators, which will provide a softer, more cushioned
ride.
• More spring pre-load should be used with heavy weight
operator's , which will provide a stiffer, more rigid ride.
• There are multiple positions in which the upper mount
of the rear shock can be positioned in. If adjusting the
spring pre-load does not achieve the ride requirement,
the shock should be moved to the next higher numbered
upper shock mounting position to achieve the desired ride
requirement.
• Before adjusting the upper shock mount to a higher
numbered upper shock mounting position, you should
attempt to achieve the ride height through the spring pre-
load adjustment.
• The highest numbered shock mounting position
should always be used when a rear mounted grass
collection system is installed on the unit.
To Adjust the Spring Pre-load:
This procedure details the process for adjusting the spring's
pre-load for the rear shocks. To adjust the spring's pre-load
for the front shocks only steps #1 and #5 are required.
The shock's pre-load adjustment consists of rotating the pre-
load adjuster (A, Figure 64) with a spanner wrench so that the
adjuster rides either up or down on the shock's fixed point (B)
into one of the adjuster's five notch positions. As the adjuster
moves up towards the spring, the spring is more compressed
which creates more spring load. As the adjuster moves down
away from the spring, the spring is less compressed creating
less spring pre-load.
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1. Park the unit on a flat, level surface such as a concrete
floor. Disengage the PTO, engage the parking brake, and
turn the ignition switch to OFF to stop the engine.
2. Chock the front wheels to prevent the unit from rolling.
3. Raise the rear of the unit and secure with jack stands.
4. Remove the rear drive tires.
WARNING
Spring loaded components can kick back causing injury.
Use two hands when adjusting the shock springs with the
spanner wrench. This will prevent the wrench from slipping
while pressure is being applied.
5. Using the supplied spanner wrench (B, Figure 1), insert
the tip of the wrench into the adjustment notch (C, Figure
64) in the pre-load adjuster (A). While holding the wrench
in place with one hand:
• Turn the pre-load adjuster so that it moves up
towards the spring, compressing it, to increase the
springs's pre-load;
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