Polaris ACE 900 2017 User manual

FOREWORD
The information printed within this publication includes the latest product information at time of print. The most recent
version of this Service Manual is available in electronic format at www.polarisdealers.com.
This Service Manual is designed primarily for use by certified Polaris Master Service Dealer®technicians in a properly
equipped shop and should be kept available for reference. All references to left and right side of the vehicle are from
the operator's perspective when seated in a normal riding position.
Some procedures outlined in this manual require a sound knowledge of mechanical theory, tool use, and shop
procedures in order to perform the work safely and correctly. Technicians should read the text and be familiar with the
service procedures before starting any repair. Certain procedures require the use of special tools. Use only the proper
tools as specified. If you have any doubt as to your ability to perform any of the procedures outlined in this Service
Manual, contact an authorized dealer for service.
We value your input and appreciate any assistance you can provide in helping make these publications more useful.
Please provide any feedback you may have regarding this manual. Authorized dealers can submit feedback using 'Ask
Polaris'. Click on 'Ask Polaris', and then click on 'Service Manual / Service Literature Question'.
Consumers, please provide your feedback in writing to: Polaris Industries Inc. ATTN: Service Publications Department,
2100 Hwy 55, Medina, MN 55340.
Publication Printed August 2018 (PN 9929422 R02)
© Copyright 2018 Polaris Industries Inc. All information contained within this publication is based on the latest product information at the time of publication. Due to
constant improvements in the design and quality of production components, some minor discrepancies may result between the actual vehicle and the information
presented in this publication. Depictions and/or procedures in this publication are intended for reference use only. No liability can be accepted for omissions or
inaccuracies. Any reprinting or reuse of the depictions and/or procedures contained within, whether whole or in part, is expressly prohibited. Printed in U.S.A.
2017-2019 ACE 900
Service Manual

SAFETY WARNINGS
The following signal words and symbols appear throughout this manual and on the vehicle. Your safety is involved
when these words and symbols are used. Become familiar with their meanings before reading the manual.
DANGER
DANGER indicates a hazardous situation which, if not avoided, WILL result in death or serious injury.
WARNING
SAFETY ALERT WARNING indicates a hazardous situation which, if not avoided, COULD result in death or serious
injury.
CAUTION
SAFETY ALERT CAUTION indicates a hazardous situation which, if not avoided, COULD result in minor to moderate
injury.
CAUTION
CAUTION indicates special precautions that must be taken to avoid vehicle damage or property damage.
NOTICE
NOTICE provides key information by clarifying instructions.
IMPORTANT
IMPORTANT provides key reminders during disassembly, assembly and inspection of components.

TRADEMARKS
POLARIS ACKNOWLEDGES THE FOLLOWING PRODUCTS MENTIONED IN THIS MANUAL:
Loctite, Registered Trademark of the Loctite Corporation
Nyogel, Trademark of Wm. F. Nye Co.
Fluke, Registered Trademark of John Fluke Mfg. Co.
Mity-Vac, Registered Trademark of Neward Enterprises, Inc.
Torx, Registered Trademark of Textron
Hilliard, Trademark of the Hilliard Corporation
Warn, Trademark of Warn Industries
FOX, Registered Trademark of FOX RACING SHOX
RydeFX, Registered Trademark of ArvinMeritor
Some Polaris factory publications can be downloaded from www.polarisindustries.com, purchased from
www.purepolaris.com or by contacting the nearest Polaris dealer.
REVISION INDEX
REV DATE CHANGES
R01 08/01/2018 Initial release.
R02 04/03/2019 Updated Oil Filter Change Procedure
FEEDBACK FORM
A feedback form has been created for the technician or consumer to provide Polaris
with an overall satisfaction rating for this service manual, provide comments on your
experience or upload pictures/video. This feedback form is viewable on a mobile
device by scanning the QR code or by clicking HERE if viewing this document
electronically.

2017-2019 ACE 900
Service Manual
Chapter Summary
CHAPTER 1: GENERAL INFORMATION
CHAPTER 2: MAINTENANCE
CHAPTER 3: ENGINE / COOLING SYSTEM
CHAPTER 4: FUEL SYSTEM
CHAPTER 5: PVT SYSTEM
CHAPTER 6: TRANSMISSION
CHAPTER 7: FINAL DRIVE
CHAPTER 8: STEERING / SUSPENSION
CHAPTER 9: BRAKE SYSTEM
CHAPTER 10: BODY / FRAME
CHAPTER 11: ELECTRICAL

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9929422 R02 - 2017-2019 ACE 900 Service Manual
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GENERAL INFORMATION
CHAPTER 1
GENERAL INFORMATION
VEHICLE INDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
MODEL NUMBER DESIGNATION (2015 +) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
VEHICLE IDENTIFICATION NUMBER (VIN) DESIGNATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
VIN AND ENGINE SERIAL NUMBER LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3
REFERENCE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
REPLACEMENT KEYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
PUBLICATION PART NUMBERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6
2017 ACE 900 XC .....................................................................................1.6
2017 ACE 900 XC CLUTCH CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7
2018 ACE 900 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8
2018 ACE 900 CLUTCH CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9
2019 ACE 900 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.10
2019 ACE 900 CLUTCH CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.11
MISC. SPECIFICATIONS AND CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.12
MASTER TORQUE TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.12
CONVERSION TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.16
SAE TAP / DRILL SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.17
METRIC TAP / DRILL SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.17
DECIMAL EQUIVALENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.18

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VEHICLE INDENTIFICATION
MODEL NUMBER DESIGNATION (2015 +)
Example: R15RUE57AC
GROUP MODEL YEAR MAKE / CHASSIS CODE ENGINE CODE REGION OPTION
1st 2nd 3rd 4th* 5th* 6th* 7th* 8th* 9th 10th**
R 1 5R U E 57A C
* = digits that would transfer to 17 digit VIN and are used in digits 4-8 respectively
** = 10th digit will be used on color/featured versions of models (not including the base)
First 3 digits and 10th digit are used in model number only. They are not used with the 17 digit VIN.
Digits 1 through 8 determine Digital Wrench calibration.
VEHICLE IDENTIFICATION NUMBER (VIN) DESIGNATION
Example: 4XAGH85A0F3000000
WORLD MFG. ID
VEHICLE DESCRIPTORS VEHICLE IDENTIFIERS
CHASSIS
DRIVELINE
CHASSIS
MODIFIER
ENGINE SIZE
ENGINE MODIFIER
CHECK DIGIT
MODEL YEAR *
MFG. LOCATION
INDIVIDUAL SERIAL NO.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
4 X A G H 8 5 A 0 F 3 0 0 0 0 0 0
* Model Year: A = 2010; B = 2011; C = 2012; D = 2013; E = 2014; F = 2015; G= 2016; H=2017
GENERAL INFORMATION

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VIN AND ENGINE SERIAL NUMBER LOCATIONS
Whenever corresponding about a Polaris ORV, be sure to refer to the vehicle identification number (VIN) and the
engine serial number.
The VIN can be found stamped on the lower frame rail qon the front left side of the ORV.
The engine serial number qcan be found on the side portion of the engine located on the cylinder head.
The transmission I.D, number qis located on the LH side of the transmission case on the prop shaft housing.
GENERAL INFORMATION
1

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REFERENCE INFORMATION
REPLACEMENT KEYS
Replacement keys can be made from the original key. To identify which series the key is, take the first two digits on the
original key and refer to the chart to the right for the proper part number.
(i.e. In this example, the first two digits are 31 which would use key blank PN 4110141.)
SERIES# PART NUMBER
20 4010278
21 4010278
22 4010321
23 4010321
27 4010321
28 4010321
31 4110141
32 4110148
67 4010278
68 4010278
PUBLICATION PART NUMBERS
YEAR MODEL MODEL NO. OWNER’S MANUAL
2017 ACE 900 XC A17DCE87AU 9926883
2018 ACE 900 XC A18DCE87BB 9928077
NOTE
When ordering service parts be sure to use the correct parts manual.
Polaris factory publications can be found at www.polaris.com or purchased from www.purepolaris.com.
GENERAL INFORMATION