Polaris ACE 570 (2018 year). Manual - part 26

108

MAINTENANCE

Air Filter

Always clean all dirt and debris away from the air box area before 

servicing the air filter. Always change the air filter at the intervals 

outlined in the Periodic Maintenance Chart beginning on page 85.
1. Remove the cargo box access panel.
2. Clean all dirt and debris from the air 

box area BEFORE servicing the air 

filter.

3. Unlatch the cover clips and carefully 

remove the air box cover.

4. Loosen the air filter clamp and 

remove the filter.

NOTICE: Dirt or debris in the air box could 

result in severe engine damage. 

Always clean all dirt and debris from 

the air box before installing the filter.

5. Inspect the air box for dirt, debris, oil 

or water. Compress the edges of the 

air box drain to drain any water. Clean 

the air box thoroughly and wipe it 

well with a clean, dry cloth.

6. Reinstall the filter. Install a new filter 

if needed. Do not attempt to clean the 

air filter. Tighten the clamp.

7. Reinstall the air box cover and secure 

the cover clips.

8. Reinstall the access panel.

Cover Clips (2)

Cover Hinges

Filter

Clamp

Air Box Drain

109

MAINTENANCE

Breather Hose Inspection

1. Remove the breather hose clamp at the engine (near the exhaust 

outlet).

2. Pull the other end of the breather hose assembly away from the 

airbox.

3. Remove the breather hose assembly from the vehicle.
4. Inspect the hoses for debris. Blow gently through the hoses to check 

for clogging. Replace a damaged or clogged hose.

5. Check hoses for cracks, deterioration, abrasions or leaks. Replace as 

needed.

6. Reinstall the hose assembly and secure the clamp at the engine. 

Push the other end of the hose firmly into the airbox fitting.

NOTICE: Operation of the vehicle without breather hoses can cause engine 

damage. Always reinstall a breather hose after removing it for 

service.

Intake Pre-Filters

The engine intake pre-filter is located on 

the right side of the cargo box. The PVT 

intake pre-filter is located on the left side 

of the cargo box.
Inspect both pre-filters before each use of 

the vehicle to ensure adequate air flow. If 

necessary, remove the pre-filters and 

clean with soapy water. Dry with low 

pressure compressed air.

NOTICE: When washing the vehicle, always 

avoid spraying water directly 

toward the PVT intake duct. See 

page 127 for recommended 

washing procedures.

Engine Intake 

Pre-Filter

110

MAINTENANCE

Spark Arrester

Failure to heed the following warnings while servicing the spark arrester could 

result in serious injury or death.
Never run the engine in an enclosed area. Remove any combustible materials 

from the area. Wear eye protection and leather work gloves. Do not stand 

behind or in front of the vehicle while purging. Never go under the vehicle while 

it's inclined.
The exhaust system can get extremely hot. Do not perform service on the spark 

arrester while the system is hot. Allow components to cool sufficiently before 

proceeding.

Use the following procedure to periodically purge accumulated carbon 

from the exhaust pipe/muffler.
1. Remove the arrester clean-out 

plug from the bottom of the 

muffler.

2. Place the transmission in PARK.
3. Start the engine.
4. Quickly press and release the 

throttle pedal several times to 

purge carbon from the system.

5. If carbon comes out of the 

exhaust, cover or plug the 

exhaust outlet. Wear protective 

gloves.

6. Lightly tap on the exhaust pipe with a rubber mallet while repeating 

step 4.

7. If particles are still suspected to be in the muffler, elevate the rear of 

the vehicle one foot (30 cm) higher than the front. Block the wheels. 

8. Place the transmission in PARK. Repeat steps 4 to 6 until no more 

particles are expelled.

9. Stop the engine. Allow the arrester to cool.
10. Reinstall the arrester plug and remove the exhaust outlet cover or 

plug.

WARNING

Exhaust Outlet

Clean-Out 

Plug

111

MAINTENANCE

Brakes

The front and rear brakes are hydraulic disc type brakes activated by the 

brake pedal. See page 35. 
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 112 

for brake fluid information. 
If you discover any irregularities in brake system operation, including 

excessive pedal travel, contact your POLARIS dealer 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.