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Rear Suspension Adjustment (Models
Equipped with Rear Suspension)
Many units equipped with rear suspension has multiple upper
mounting positions for the rear shock assembly (A, Figure
1). If the unit that you are installing the collection system
on is equipped with rear suspension, the upper mounting
position of the rear shock assembly must be re-positioned to
accommodate the additional weight of the collection system.
1
Some units are equipped with two (2) upper shock mounting
positions and some units are equipped with three (3) upper
shock mounting positions. To accommodate the additional
weight of the collection system the upper end of the shock
mount assembly must re-positioned so that the shock is in its
most vertical orientation.
If the unit that you are installing the collection system on does
not have additional upper mounting positions, the spring's
pre-load must be adjusted. For unit's with additional upper
mounting positions: if a stiffer ride is desired after the rear
shock is re-positioned to it's most vertical position, it can be
achieved by adjusting the spring's pre-load.
To adjust the upper shock mounting position:
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 key from the ignition.
2. Chock the front wheels of the unit to prevent the machine
from rolling.
3. Raise the rear of the machine and secure with jack
stands. The jack stands must be positioned under the
bumper of the unit.
4. Position the jack under the suspension cradle (or the
cross member that ties the suspension arms together,
depending on your unit) and slowly raise the rear
suspension to relieve the pressure on the upper shock
mounting bolts.
Note: This will require small adjustments to the jacks position.
The shock should move freely on the mounting bolt when the
pressure is relieved.
5. Remove the upper shock mounting hardware and
pivot the shock to the position that orients the shock
most vertically (position #2 for units with two (2) upper
mounting positions; position #3 for units with three (3)
upper mounting positions). Adjust the jack to align the
shock assembly to the shock mounting hole.
6. Re-install the upper shock mounting hardware and
tighten securely.
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.
5
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