Polaris Ace RZR 570, RZR 570 EPS (2018 year). Manual - part 27

109

MAINTENANCE

Brakes

The front and rear brakes are hydraulic disc type brakes activated by the 
brake pedal. See page 36. 

Always check brake pedal travel and the brake fluid reservoir level 
before each use of the vehicle. When applied, the brake pedal should 
feel firm. Any sponginess would indicate a possible fluid leak or low 
brake fluid level, which must be corrected before riding. See page 110 
for brake fluid information. 

If you discover any irregularities in brake system operation, including 
excessive pedal travel, contact your POLARIS dealer or other qualified 
personnel for proper diagnosis and repairs.

WARNING! Operating the vehicle with a spongy brake pedal can result in loss 
of braking, which could cause an accident resulting in severe injury or death. 
Never operate the vehicle with a spongy-feeling brake pedal.

110

MAINTENANCE

Brakes

Brake Fluid

Inspect the level of the brake fluid before each operation. If the fluid 
level is low add DOT 4 brake fluid only. See page 132 for the part 
numbers of POLARIS products.

WARNING! After opening a bottle of brake fluid, always discard any unused 
portion. Never store or use a partial bottle. Brake fluid is hygroscopic, meaning it 
rapidly absorbs moisture from the air. The moisture causes the boiling 
temperature of the brake fluid to drop, which can lead to early brake fade and 
the possibility of accident or severe injury.

Change the brake fluid every two 
years and any time the fluid 
becomes contaminated, the fluid 
level is below the minimum, or if 
the type and brand of the fluid in 
the reservoir are unknown. 
Access the brake fluid reservoir 
through the left front wheel well.

1. Position the vehicle on a 

level surface.

2. Place the transmission in 

PARK.

3. View the brake fluid level in 

the reservoir. The level 
should be between the 
maximum and minimum 
level lines.

4. If the fluid level is lower 

than the lower level line, add 
brake fluid to the upper line. 

5. Apply the brake forcefully for a few seconds and check for fluid 

leakage around the fittings.

Brake Fluid 

Reservoir

Maximum

Minimum

111

MAINTENANCE

Brakes

Brake Inspection

1. Check the brake system for 

fluid leaks.

2. Check the brake pedal for 

excessive travel or a spongy 
feel. 

3. Check the friction pads for 

wear, damage and looseness.

4. Check brake discs for signs 

of cracks, excessive 
corrosion, warping or other 
damage. Clean any grease 
using an approved brake 
cleaner or alcohol. 

WARNING! Do not apply WD-40 or any petroleum product to brake discs. 
These types of products are flammable and may also reduce the friction 
between the brake pad and caliper.

5. Inspect the brake disc spline and pad wear surface for excessive 

wear. Change pads when worn to 0.030" (0.762 mm).

Steering Wheel Inspection

Check the steering wheel for specified freeplay and smooth operation at 
the intervals outlined in the Periodic Maintenance Chart beginning on 
page 83. 

1. Position the vehicle on level ground.

2. Lightly turn the steering wheel left and right.

3. There should be 0.8"-1.0" (20-25 mm) of freeplay.

4. If there is excessive freeplay or strange noises, or the steering feels 

rough or “catchy,” have the steering system inspected by an 
authorized POLARIS dealer or other qualified personnel.

0.030" (0.762mm)

112

MAINTENANCE

Suspension Settings

The front and rear suspensions are preload adjustable, with five settings 
on each axle.

The suspensions are set on the lowest (softest) setting at the factory. 
This setting is appropriate for nearly all riding conditions. Since the 
vehicle is equipped with full skid plates, suspension adjustment is not 
necessary.

If desired, the suspension may be adjusted to maintain vehicle clearance 
height when carrying loads. Your POLARIS dealer can provide the tool 
required to make suspension adjustments. Elevate the vehicle slightly 
for easier adjustment.

Always heed the following rules if you make adjustments to this 
suspension.
• Always return the suspension to the lowest (softest) setting after the 

load is removed from the vehicle. The increased suspension height 
will negatively impact vehicle stability when operating without a 
load.

• Always apply the same adjustment setting to all four wheels.
• Never operate the vehicle on the highest (stiffest) or second highest 

preload settings without a total combined payload in the vehicle of 
450 lbs. (204 kg) or more. Payload includes the driver, passenger, 
POLARIS-approved accessories and cargo. Never exceed the stated 
load capacity for this vehicle. See page 130.

Adjustment 

Cam

Lowest 

(Softest) 

Setting

Highest 

(Stiffest) 

Setting