E-REVO BRUSHLESS • 21
Important:
The shocks are
assembled at the factory
with a center-to-center
distance (between the rod
end balls) of 87mm. Any time
the shocks are removed and
disassembled, this distance
should be checked to ensure
proper operation of the
suspension.
87mm
BASIC TUNING ADJUSTMENTS
The ride height of the
model can be changed by
mounting the push rod
in a different hole in the
lower suspension arm.
From the factory, the push
rod comes installed in the
center hole of the lower
suspension arm’s push rod mount. If the push rod is mounted in the
inner hole, the ride height of the vehicle increases. If mounted in the
outer hole, the ride height decreases.
The ride height can be finely tuned by adjusting the sag of the
suspension.
Do not attempt to make large changes to the ride
height by adjusting the spring pre-load on the shock bodies.
If
suspension sag is severe and requires a large increase of the spring
pre-load to compensate, then a firmer spring should be used.
The lowest ride height can be achieved by installing the optional
adjustable push rod in the outermost hole of the lower suspension
arm’s push rod mount. Turn the rod ends all the way in until they stop
(shortening the length).
The optional Long Travel rocker arms are designed to be used only
with the standard non-adjustable push rods installed in the hole
labeled “LT” (the middle hole of the lower suspension arm’s push rod
mount). Any minor adjustments to the ride height are accomplished
by adjusting the spring pre-load.
Adjusting the Pivot Ball Caps
The pivot ball caps should be
adjusted so that the pivot balls
operate freely in the axle carriers
with no excess play. Use the
provided four-way suspension
multi-tool to tighten or loosen the
pivot ball cap.
Shock Oil
The 4 oil-filled aluminum shocks (dampers) effectively control the
suspension movement by preventing the wheels and tires from
continuing to “bounce” after rebounding from a bump. Changing the
oil in the shocks can vary the suspension damping effect. Changing the
oil to a higher viscosity oil will increase damping. Lowering the viscosity
of the oil will cause the suspension damping to be reduced. Damping
should be increased (with higher viscosity oil) if the model is bottoming
easily over jumps. Damping should be decreased (with thinner viscosity
oil) if the model is hopping over small bumps and feels unstable. The
viscosity of shock oil is affected by extremes in operating temperature;
an oil of certain viscosity will become less viscous at higher
temperatures and more viscous at lower temperatures. Operating in
regions with cold temperatures may require lower viscosity oil. From
the factory, the shocks are filled with SAE-40W silicone oil. Only use
100% silicone oil in the shock.
For shock piston tuning see Advanced Tuning Adjustments on page 27.
Replacing Shock Oil
The shocks have to be
removed from the vehicle and
disassembled to change the oil.
1. Remove the lower spring
retainer and shock spring.
2. Remove the upper shock cap
using the shock wrench and
the suspension multi tool
3. Empty the used shock oil from the shock body.
4. Fill the shock with new silicone shock oil up to the top of the
shock body.
5. Slowly move the piston up and down (always keeping it submerged
in oil) to release the air bubbles. Let the shock sit for a few minutes
to allow any remaining air bubbles to surface.
6. Slowly thread the upper cap with the installed shock bladder onto
the shock body with the suspension multi tool. The excess oil will
bleed out of the small hole in the shock cap.
7. Tighten the shock cap until snug. Use the included steel shock
wrench to hold onto shock body while tightening.
Increases
Ride Height
Decreases
Ride Height
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