This 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 inthis 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 service procedures before starting the work. Certain procedures require the use of special tools. Use
only the proper tools as specified.
This manual includes procedures for maintenance operations, component identification and unit repair, along
with service specifications for 2003 Polaris Trail Boss ATVs.Comments or suggestions about this manual may
be directed to: Service Publications Dept. @ Polaris Sales Inc. 2100 Hwy 55 Medina Minnesota 55340.
2003 Trail Boss 330 ATV Service Manual (PN 9918061)
ECopyright 2002 Polaris Sales Inc. All information contained within this publication is based on the latest product information at the time of
publication. Due to constant improcvements in the design and quality of production components, some minor descrepancies 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 ommisions 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.
UNDERSTANDING SAFETY LABELS AND INSTRUCTIONS
Throughout these instructions, important information is brought to your attention by the following symbols:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
DANGER
Failure to follow DANGER instructions will result in severe injury or death to the operator, bystander or person
inspecting or servicing the ATV.
WARNING
Failure to follow WARNING instructions could result in severe injury or death to the operator, bystander or
person inspecting or servicing the ATV.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid personal injury, or ATV or property
damage.
NOTE:
A NOTE provides key information to clarify instructions.
Trademarks
Polaris acknowledges the following products mentioned in this manual:
FLEXLOC, Registered Trademark of SPS Technologies
Loctite, Registered Trademark of the Loctite Corporation
STA-BIL, Registered Trademark of Gold Eagle
FOX, Registered Trademark of Fox Shox
Nyogel, Trademark of Wm. F. Nye Co.
Fluke, Registered Trademark of John Fluke Mfg. Co.
Mity Vac, Registered Trademark of Neward Enterprises, Inc.
Ammco, Registered Trademark of Ammco Tools, Inc.
Torx, Registered Trademark of Textron
Hilliard, Trademark of the Hilliard Corporation
CHAPTER INDEX
CHAPTER 1GENERAL
CHAPTER 2MAINTENANCE
CHAPTER 3ENGINE
CHAPTER 4FUEL SYSTEM
CHAPTER 5BODY/SUSPENSION
CHAPTER 6PVT SYSTEM
CHAPTER 7FINAL DRIVE
CHAPTER 8TRANSMISSION
CHAPTER 9BRAKES
CHAPTER 10ELECTRICAL
GENERAL INFORMATION
CHAPTER 1
GENERAL INFORMA TION
MAINTENANC
2003 Model Identification1.2..................
Serial Number Location1.2...................
2003 Trailboss Model1.3.....................
Replacement Keys1.4.......................
Machine Dimensions1.5.....................
Specifications - 2003 Trail Boss 3301.6-1.7........
Publication Numbers1.8.....................
Paint Codes1.8.............................
Standard Torque Specifications1.8............
Tap Drill Charts1.9..........................
Decimal Equivalent Chart1.9.................
Unit of Measure Conversion Table1.10..........
Glossary of Terms1.11........................
E
/
1
1.1
GENERAL INFORMATION
MODEL IDENTIFICATION
The machine model number must be used with any correspondence regarding warranty or service.
Machine Model Number Identification
A03CA32AA
Emissions &
Year Designation
Basic Chassis
DesignationEngine Designation
Model Option
ENGINE DESIGNATION NUMBERS
32 ES32PFE10Single, Air Cooled, SOHC 4 Stroke, Electric Start............
VIN IDENTIFICATION
World Mfg. ID
123456789 10 11 1213 1415 1617
4XAAA
Vehicle Descriptor
32A*3P000000
Vehicle Identifier
Body Style
Powertrain
Emissions
Engine
Check Digit
Model
Year
Plant No.
Individual Serial No.
* This could be either
a number or a letter
ENGINE SERIAL NUMBER LOCA TION
Whenever corresponding about an engine, be sure to refer to the engine model number and serial number. This
information can be found on the sticker applied to the recoil housing on the right side of engine.(A) An additional
number is stamped on the center top of crankcase beneath the cylinder coolant elbow.
UNIT MODEL NUMBER AND SERIAL NUMBER LOCATION
The machine model number and serial number are
important for vehicle identification. The machine
serial number is stamped on the lower left side of
the frame tube.(B)
A
Front
B
TRANSMISSION I.D. NUMBER
LOCA
TION
1.2
The transmission I.D. number is located
on top of the transmission, right side of
machine.
GENERAL INFORMATION
2003 TRAILBOSS MODEL
2003 TRAILBOSS 330
1.3
REPLACEMENT KEYS
Replacement keys can be made from the original
key. T o 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.
Should both keys become lost, ignition switch
replacement is required.
31XX
Key Series
Number
GENERAL INFORMATION
Series #Part Number
204010278
214010278
224010321
234010321
274010321
284010321
314110141
324110148
674010278
684010278
1.4
GENERAL INFORMATION
MACHINE DIMENSIONS
46 in
117 cm
FRONT
34 in
86 cm
46 in
117 cm
75 in
191 cm
SIDE
49.5 in
126 cm
1.5
MODEL:2003 TRAIL BOSS 330..........
Altitud
e
Below40
F
+40Fto+80
F
(Feet
)
above1800
Altitud
e
Meter
s
0-180
0
(Feet
)
180
0-370
0
MODEL NUMBER:A03CA32.
ENGINE MODEL:ES32PFE10..
GENERAL INFORMATION
CARBURETION
TypeBST 34 Mikuni................
Main Jet122.5............
Pilot Jet42.5.............
Jet Needle4HB48--2...........
Needle JetP-0M...........
Pilot Screw2 Turns Out..........
Pilot Air Jet160..........
Valve Seat1.5...........
Fuel Octane (R+M/2)87 Non-Oxygenated or.
89 Oxygenated
CLUTCH
TypePVT....................
Belt321 1077.....................
Belt Width (Projected)1.1882 (30.18mm).....
Side Angle (Overall)26°......
Outside Circumference40.86 ±.122....
Center Distance10±.122 (254.5mm)..........
Clutch Offset0.52 (12.7mm)............
Drive SpringGrey.............
Driven SpringBlack............
Driven Helix2+2.............
JETTING CHART
Altitude
Meters
(Feet)
0-1800
(0-6000)
above 1800
(above 6000)
CLUTCH CHART
Meters
(Feet)
*40E helix, black driven spring
0-1800
(0-6000)
1800-3700
(6000-12000)
AMBIENT TEMPERATURE
Below 40°F
Below 5°C
117.5122.5
120115
Shift
WeightSpringSpringHelix
20--40Blue/GreyBlack2+2
20--38Blue/GreyBlack2+2
+40EFto+80EF
+5ECto+26EC
Drive Clutch
Driven Clutch
Driven
ENGINE
Type4 Cycle, Single Cyl........................
Displacement329 cc...............
Bore3.0912 (78.5mm).......................
Stroke2.6792 (68mm).....................
Valve Clearance In & Ex0.006 ± 0.00082 (0.15 ± 0.02 mm) BTDC on compression......
CoolingAir with fan assisted oil cooler....................
Toe Out1/82-1/42 (3-6.35 mm)Brake (Hand)Single Lever, Hyd. Disc..................
Ground Clearance5.52 (13.97 cm)Brake ( Auxiliary Foot) Hydraulic..
Front V ertical Travel6.72 (17.02 cm)
Rear SuspensionProgressive Rate Swing Arm...
Rear Travel9.02 (22.86 cm)........
Rear Shock22 Gas Charged Twin T ube........
Shock AdjustmentCam..
TIRES
Tire Size - Front23 x 7 - 10....
Tire Size - Rear22 x 11 - 10....
Tire Pressure - F/R4/3 lbs..
Total Width462 (117 cm)........
Total Length752 (191 cm).......
Total Height462 (117 cm)........
Wheel Base49.52 (125.73 cm).......
Weight - Dry505 lbs. (230 kg).......
LOAD CAPACITY
Front Rack (Accy)75 lbs. (34 kg)....
Rear Rack (Std)125 lbs. (57 kg)......
Tongue Weight85 lbs. (14 kg).......
Tow HitchStd...........
OPTIONAL SUSPENSION SPRINGS
SPRING TYPESOFTSTANDARDFIRM
Rear Compression Spring
N/A
Front Strut SpringN/A7041850-067
7041518-067
130 --165 lb/in.
41 lb/in.
7041303-067
250 lb/in.
7041375-067
64 - 113 lb/in.
1.7
PUBLICATION NUMBERS
2003TrailB
330A03CA32AA991749299178629917863
GENERAL INFORMATION
YearModelModel No.Owner’s
Manual PN
oss
NOTE: When ordering service parts be sure to use the correct parts manual.
Parts
Manual PN
Parts
Micro Fiche PN
PAINT CODES
PAINTED PARTCOLOR
DESCRIPTION
SpringsSilver-- --P-385
RimsBright White2185P-133
Rack(s)Black9440P-067
FrameBlack9440P-067
FRAME COLOR - P067 Medium Gloss Black 9440 / 8520147.
Order direct from Midwest Industrial Coatings 952--252--2000 See Quick Reference Manual for ordering info.
DITZLER
NUMBER
POLARIS
NUMBER
STANDARD TORQUE SPECIFICATIONS
The following torque specifications are to be used as a general guideline. F OR SPECIFIC TORQUE VALUES OF
FASTENERS Refer to exploded views in the appropriate section. There are exceptions in the steering,
ABDC: After bottom dead center.
ACV: Alternating current voltage.
Alternator: Electrical generator producing voltage alternating current.
ATDC: After top dead center.
BBDC: Before bottom dead center.
BDC: Bottom dead center.
BTDC: Before top dead center.
CC: Cubic centimeters.
Center Distance: Distance between center of crankshaft and center of driven clutch shaft.
Chain Pitch: Distance between chain link pins (No. 35 = 3/8² or 1 cm). Polaris measures chain length in number of pitches.
CI: Cubic inches.
Clutch Buttons: Plastic bushings which aid rotation of the movable sheave in the drive and driven clutch.
Clutch Offset: Drive and driven clutches are offset so that drive belt will stay nearly straight as it moves along the clutch face.
Clutch Weights: Three levers in the drive clutch which relative to their weight, profile and engine RPM cause the drive
clutch to close and grip the drive belt.
Crankshaft Run-Out: Run-out or “bend” of crankshaft measured with a dial indicator while crankshaft is supported
between centers on V blocks or resting in crankcase. Measure at various points especially at PTO.
DCV: Direct current voltage.
Dial Bore Gauge: A cylinder measuring instrument which uses a dial indicator. Good for showing taper and
out-of-round in the cylinder bore.
Electrical Open: Open circuit. An electrical circuit which isn’t complete.
Electrical Short: Short circuit. An electrical circuit which is completed before the current reaches the intended load.
(i.e. a bare wire touching the chassis).
End Seals: Rubber seals at each end of the crankshaft.
Engagement RPM: Engine RPM at which the drive clutch engages to make contact with the drive belt.
ft.: Foot/feet.
Foot Pound: Ft. lb. A force of one pound at the end of a lever one foot in length, applied in a rotational direction.
g: Gram. Unit of weight in the metric system.
gal.: Gallon.
ID: Inside diameter.
in.: Inch/inches.
Inch Pound: In. lb. 12 in. lbs. = 1 ft. lb.
kg/cm2: Kilograms per square centimeter.
kg-m: Kilogram meters.
Kilogram/meter: A force of one kilogram at the end of a lever one meter in length, applied in a rotational direction.
lorltr: Liter.
lbs/in2: Pounds per square inch.
Left or Right Side: Always referred to based on normal operating position of the driver.
m: Meter/meters.
Mag: Magneto.
Magnetic Induction: As a conductor (coil) is moved through a magnetic field, a voltage will be generated in the
windings. Mechanical energy is converted to electrical energy in the stator.
mi.: Mile/miles.
mm: Millimeter. Unit of length in the metric system. 1mm = approximately .040².
Nm: Newton meters.
OD: Outside diameter.
Ohm: The unit of electrical resistance opposing current flow.
oz.: Ounce/ounces.
Piston Clearance: Total distance between piston and cylinder wall.
psi.: Pounds per square inch.
PTO: Power take off.
PVT: Polaris Variable Transmission (Drive Clutch System)
qt.: Quart/quarts.
Regulator: Voltage regulator. Regulates battery charging system output at approx. 14.5 DCV as engine RPM increases.
Reservoir Tank: The fill tank in the liquid cooling system.
Resistance: In the mechanical sense, friction or load. In the electrical sense, ohms, resulting in energy conversion to heat.
RPM: Revolutions per minute.
Seized Piston: Galling of the sides of a piston. Usually there is a transfer of aluminum from the piston onto the cylinder wall.
Stator Plate: The plate mounted under the flywheel supporting the battery charging coils.
TDC: Top dead center. Piston’s most outward travel from crankshaft.
Vol t: The unit of measure for electrical pressure of electromotive force. Measured by a voltmeter in parallel with the circuit.
Watt: Unit of electrical power. Watts = amperes x volts.
WOT: Wide open throttle.
Steering and Toe Alignment2.20-2.22...............
Exhaust System Maintenance2.22.............
Brake System Service2.23-2.24....................
Drive Chain and Sprocket Service2.24-2.26..........
Suspension Service / Controls2.26-2.27.............
Wheel Removal / Installation2.27...............
Tire Inspection2.28...........................
2.1
MAINTENANCE
PERIODIC MAINTENANCE CHART
Inspection, adjustment and lubrication intervals of important components is listed in the following chart.
Maintenance intervals are based upon average riding conditions and a vehicle speed of approximately 10 mph.
Inspect, clean, lubricate, adjust or replace parts as necessary. NOTE: Inspection may reveal the need for
replacement parts. Always use genuine Polaris parts
H = CAUTION: Due to the nature of these adjustments, it is recommended that service be performed by
an authorized Polaris dealer.
" = Vehicles subjected to severe use (operation in wet or dusty areas, low speed heavy load operation,
prolonged idle) should be inspected and serviced more frequently. For engine oil, short trip cold
weather riding also constitutes severe use. Pay special attention to oil level. A rise in oil level in cold weather
can indicate moisture collecting in the oil tank. Change oil immediately if oil level begins to rise.
E =Emission Control System Service (California).
(Whichever comes first)
ItemHoursCalendarMiles
Engine Oil - Level/Change100 hrs6 months1000 (1600)Check Level Daily; Break In service at 1 month
E"
Oil Filter100 hrs6 months1000 (1600)Replace with oil change
E
Air Filter - Foam Pre-CleanerDailyDailyIns pect-Clean & oil more often in dirty conditions.
E"
Air Filter - Main ElementWeeklyWeeklyInspect - Replace if necessary
Annually12 monthsInspect T orque and Locking Fastener and re-
place if necessary
placed
Remarks
PRE-RIDE / DAIL Y INSPECTION
Perform the following pre-ride inspection daily, and when servicing the vehicle at each scheduled maintenance.
GTires - check condition and pressures
GFuel and oil tanks - fill both tanks to their proper level; Do not overfill oil tank
GAll brakes - check operation and adjustment (includes auxiliary brake)
GThrottle - check for free operation and closing
GHeadlight/Taillight/Brakelight - check operation of all indicator lights and switches
GEngine stop switch - check for proper function
GWheels - check for tightness of wheel nuts and axle nuts; be sure axle nuts are secured by cotter pins
GDrive chain - condition and slack; refer to drive chain adjustment
GAir cleaner element - check for dirt; clean or replace
GSteering - check for free operation noting any unusual looseness in any area
GLoose parts - visually inspect vehicle for any damaged or loose nuts, bolts or fasteners
GEngine coolant - check for proper level at the recovery bottle
2.3
MAINTENANCE
POLARIS LUBRICANTS,MAINTENANCE AND SERVICE PRODUCTS
Part No.Description
Engine Lubricant
2870791Fogging Oil (12 oz. Aerosol)
2871281Engine Oil (Quart) Premium 4 Synthetic
0W-- 40 (4 -- Cycle) (12 Count)
2871844Engine Oil (Gallon) Premium 4 Synthetic
0W-- 40 (4 -- Cycle) (4 Count)
2871567Engine Oil (16 Gallon) Premium 4
Synthetic 0W--40 (4--Cycle)
Gearcase / Transmission Lubricants
2873603Premium Synthetic Gearcase Lubricant (1
Gal.) (4 Count)
2873602Premium Synthetic Gearcase Lubricant
(12 oz. bottle) (12 Count)
2871653Premium Front Gearcase Fluid (8 oz.) (12
Count)
2871653Premium Front Gearcase Fluid (2.5 Gal)
(2 Count)
2870465Oil Pump for 1 Gallon Jug
2871654Premium Drive Hub Fluid (8 oz.) (12
Count)
2872277Premium Drive Hub Fluid (2.5 gal.) (2
Count)
2871653AngleDriveFluid(8oz.)
Grease / Specialized Lubricants
2871322Premium All Season Grease (3 oz.
cartridge) (24 Count)
2871423Premium All Season Grease (14 oz.
cartridge) (10 Count)
2871460Starter Drive Grease (12 Count)
2871515Premium U-Joint Lube (3 oz.) (24 Count)
2871551Premium U-Joint Lube (14 oz.) (10 Count)
2871312Grease Gun Kit
2871329Dielectric Grease (Nyogel)
Coolant
287132360/40 Coolant (Gallon) (6 Count)
287153460/40 Coolant (Quart) (12 Count)
Additives / Sealants / Thread Locking Agents /
Misc.
2870585Loctite Primer N, Aeros ol, 25 g
2871956Loctite Thread Sealant 565 (50 ml.) (6
Count)
2871949Loctite Threadlock 242 (50 ml.) (10
Count)
2871950Loctite Threadlock 242 (6 ml.) (12
Count)
2871951Loctite Threadlock 262 (50 ml.) (10
Count)
2871952Loctite Threadlock 262 (6 ml.) (12
Count)
2871953Loctite Threadlock 271 (6 ml.) (12
Count)
2871954Loctite Threadlock 271 (36 ml.) (6
Count)
2870584Loctite 680-Retaining Compound (10
ml.)
2870587Loctite 518 Gasket Eliminator / Flange
Sealant (50 ml.) (10 Count)
2872113Disk Brake Quiet (12 oz.) (12 Count)
2871326Premium Carbon Clean (12 oz.) (12
Count)
2870652Fuel Stabilizer (16 oz.) (12 Count)
2871957Black RTV Silicone Sealer (3 oz. tube)
(12 Count)
2871958Black RTV Silicone Sealer (11 oz.
cartridge) (12 Count)
2870990DOT3 Brake Fluid (12 Count)
2872113Disc Brake Quiet, Aerosol, (9 oz.) (12
Count)
2871557Crankcase Sealant, 3-Bond 1215 (5oz.)
2872893Engine Degreaser (12oz.) (12 Count)
NOTE: The number count indicated by each part
number in the table above indicates the number of
units that are shipped with each order.
NOTE: Each item can be purchased separately at
your local Polaris dealer.