Suspension Adjustment - Ferris ISX3300 Series Operator's Manual

• If the gap is less than .010, the electric PTO clutch
will need to be replaced;
• If sufficient gap is present, proceed to the Blade
Brake Check procedure.
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Blade Brake Check
Mower blades and mower deck drive belt should come to a
complete stop within seven (7) seconds after electric PTO
switch is turned off.
1. With parking brake engaged, PTO disengaged and an
operator in the seat, start the engine.
2. Have an assistant observe the mower drive belt through
the open end of the left-hand arbor cover. Engage the
PTO and wait several seconds. Disengage the PTO and
check the amount of time it takes for the mower drive belt
to stop.
3. If the mower drive belt does not stop within seven (7)
seconds, perform the Electric PTO Clutch Adjustment. If
the belt still does not stop within seven (7) seconds, see
your authorized Ferris servicing dealer.

Suspension Adjustment

The shock assemblies (A, Figure 73) can be adjusted to allow
the operator to customize the ride according to the operator's
weight and/or operating conditions.
73
The front shock assemblies can be adjusted by changing the
spring's pre-load.
The rear shock assemblies can be adjusted by changing the
spring's pre-load and/or upper mounting position.
A spanner wrench (B) was included with the literature packet
that came with this unit. The spanner wrench is used to adjust
the spring's pre-load.
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 three positions in which the upper shock
mount can be positioned to. If adjusting the spring's 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 position you should attempt to achieve the ride
height through the spring's pre-load adjustment.
• Shock mounting position #3 should always be used when
a rear-mounted grass collection system is installed on the
unit.
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