Polaris ACE 570 (2018 year). Manual - part 27

112

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 134 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. Remove the front box cover 

and access panel. See page 

27.

4. View the brake fluid level in 

the reservoir. The level 

should be between the 

maximum and minimum 

level lines.

5. If the fluid level is lower than 

the lower level line, add 

brake fluid to the upper line. 

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

leakage around the fittings.

Brake Fluid 

Reservoir

Brake Fluid Reservoir

Maximum

Minimum

113

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).

0.030" (0.762mm)

114

MAINTENANCE

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 85. 
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.

Rear Spring

The rear shock absorber spring is adjusted 

by rotating the adjuster either clockwise 

or counter-clockwise to increase or 

decrease spring tension.
Accessory springs are available through 

your POLARIS dealer.

Adjuster

115

MAINTENANCE

Tires

Operating your vehicle with worn tires will increase the possibility of skidding, 

loss of control and an accident, which could result in serious injury or death. 

Always replace tires when the tread depth measures 1/8” (3 mm) or less.
Improper tire inflation or the use of non-standard size or type of tires may 

adversely affect vehicle handling, which could result in vehicle damage or 

personal injury. Always maintain proper tire pressure. Always use POLARIS-

approved size and type of tires for this vehicle when replacing tires.

Tire Tread Depth

Always replace tires 

when tread depth is 

worn to 1/8” (3 mm) or 

less.

Axle and Wheel Nut Torque Specifications

Inspect the following items occasionally for tightness, and if they've 

been loosened for maintenance service. Do not lubricate the stud or the 

lug nut.

Lug Nut 

(Aluminum 

Wheels)

Front and Rear

30 ft-lbs (41 Nm) 

PLUS 1/4 TURN or 

90 degrees

2-Piece Flange 

Nut (Steel 

Wheels)

Front and Rear

27 ft-lbs (37 Nm)

Hub Retaining Nut

Front and Rear

80 ft-lbs (108 Nm)

WARNING

1/8" (3 mm)