Ferris FAST-Vac Operator's Manual page 9

7. Remove the jack from underneath the suspension
cradle (or suspension cross member, depending
on your unit).
8. Remove the jack stands from underneath the
machine.
To adjust the spring pre-load:
1. Park the machine on a flat, level surface. Engage
the parking brake, disengage the PTO, turn the
ignition switch to OFF, and remove the ignition
key.
2. Chock the front wheels of the machine to prevent
the machine from rolling.
3. Raise the rear of the machine and secure with jack
stands.
4. Remove the rear drive tires.
WARNING
Use two hands when adjusting the shock
assembly springs. The will prevent the wrench
from slipping while pressure is being applied.
5. To adjust the spring pre-load of the shock
assembly (A, Figure 2) insert the tip of the
spanner wrench (p/n 5022853) (B), that came with
the zero-turn riding mower, into the notch of the
pre-load adjuster (C). While holding the spanner
wrench in place with one hand, turn counter-
clockwise to increase the amount of pre-load.
(Turning clockwise will decrease the amount
of pre-load.) Make sure that both rear shock
assemblies are adjusted to the same pre-load
position.
6. Re-install the rear drive tires. Torque the lug bolts
to 85-91 ft. lbs. (115-129 Nm). Remove the jack
stands from under the machine.
NOTE: If the spanner wrench is not located in a clamp
under the seat plate of your unit, it was included with
the publication packet for the zero-turn riding mower.
Installation Installation
7