Snowmobile Polaris 600 RUSH (2010 year). Manual - part 61

8.10

Steering and Suspensions

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

Rear Track Shock (RTS) Factory Settings

The RTS spring is the primary suspension setup and 
tuning component. For more information regarding how to 
set the spring preload and compression dampening, 
reference the Pro-Ride Progressive Suspension or Pro-
Ride RMK Coil-Over Rear Suspension sections in this 
chapter.

I

2011-2012 RUSH/SWITCHBACK

RMK COIL OVER

8.11

Steering and Suspensions

8

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

Limiter Straps

The limiter straps on the Pro-Ride Progressive and Pro-
Ride RMK Coil-Over rear suspensions are not adjustable. 
Drilling new holes in the straps to increase or decrease 
strap length is not recommended.

The limiter straps on Switchback/RMK 144 rear 
suspensions are adjustable. The limiter straps are initially 
set in the mid position.

Move BOTH limiter straps to the HIGH position to increase 
ski pressure and reduce ski lift. The HIGH position moves 
the balance of the snowmobile towards the front which 
increases cornering characteristics, but reduces flotation.

Move BOTH limiter straps to the LOW position to decrease 
ski pressure and increase ski lift. The LOW position moves 
the balance of the snowmobile towards the rear which 
increases traction and flotation, but reduces cornering 
characteristics.

Torque limiter strap nuts to specification.

Torsion Springs/SAG Setting

The Switchback 144 rear suspension is equipped with rear 
torsion springs. The spring preload can be set by adjusting 
the torsion spring preload blocks.

The torsion spring preload sets the rear suspension SAG 
setting. SAG is the difference between the unloaded and 
loaded rear bumper height when the snowmobile is sitting 
on snow.

The specified SAG setting for the Switchback 144 Tipped 
rear suspension is 5" (12.7cm). to set SAG, follow these 
steps:

1.

Position the snowmobile on snow.

NOTE: Positioning  the  snowmobile on a hard 
surface (pavement/concrete) distributes more 
weight to the rear track shock/torsion springs and 
can distort the following measurements.

2.

Lift the rear bumper to fully extend the rear 
suspension. Using a tape measure, find (X).

3.

Have the rider, in riding gear, mount the snowmobile. 
The rider should drop down hard on the seat and 
bounce the suspension several times to collapse the 
suspension.

4.

Again, measure the distance between the rear 
bumper and ground (Y).

5.

Subtract measurement Y from X (X-Y=SAG).

= T 

Limiter Strap Fasteners: 19 ft-lb (25 Nm)

HIGH
MID
LOW

X

Y

8.12

Steering and Suspensions

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

6.

Set both torsion spring adjuster blocks to SOFT, 
MEDIUM, or FIRM to achieve the specified SAG 
measurement.

NOTE:  Optional torsion springs are available to fine 
tune SAG setting. See individual model 
specifications in Chapter 1.

SOFT

MEDIUM

FIRM

8.13

Steering and Suspensions

8

9923311 - 2010-2012 PRO-RIDE RUSH/Switchback/RMK Service Manual

© 2011 Polaris Sales Inc.

FRONT SUSPENSION ASSEMBLY ILLUSTRATIONS

2010 Pro-Ride Front Control Arms

NOTE: Assembly Notes

• Orientate rod ends so they are parallel with mating 

component.

• Apply grease to pivot shafts during assembly.

MOUNTING STUDS

MOUNTING STUDS

PIVOT SHAFTS

BUSHINGS

UPPER CONTROL ARM

LOWER CONTROL ARM

SPINDLE

BUSHING

SNAP RING

SPHERICAL BEARING

C

C

C

C

C

C

C

B

B

A

A

BUSHINGS

BUSHINGS

D

WASHERS

CAUTION

Never re-use lock nuts. Always re-assemble using new 

lock nuts.

= T 

A: 37 ft-lb (50 Nm) (Shock Mounting Fastener Nuts)



B: 40 ft-lb (54 Nm)



C: 30 ft-lb (41 Nm)



D: 44 ft-lb (60 Nm) Apply Loctite® 262™ to Threads