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Sportsman 400
Polaris Sportsman 400 User Manual
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ENGINE
3.21
CAMS
HAFT
RE
MOV
AL
1.
Remove
thermos
tat
housing.
2.
Remove
camshaf
t
sprock
et
ins
pect
ion
cov
er
.
3.
Loosen
t
hree
c
amshaf
t
sprock
et
bolts.
4.
Remove
camshaf
t
end
cap
and
O
-Ring.
5.
Ins
pect
camshaf
t
end
c
ap
(t
hrus
t
f
ace)
for
wear
.
Replace
if
worn
or
damaged.
89
91
Table of Contents
Chapter Index
1
Table of Contents
1
General Information
3
Identification Numbers
3
Model Identification
3
Engine Serial Number Location
3
Replacement Keys
4
Model Color Identification
5
Machine Dimensions
10
Spring Position (Sheave)
15
Paint Codes
19
Publication Numbers
19
Standard Torque Specifications
20
Decimal Equivalents
23
Decimal Equivalent Chart
25
Sae Tap Drill Sizes
25
Glossary of Terms
26
Chapter 2 Maintenance
28
Chapter 1
28
Periodic Maintenance Chart
29
Pre-Ride Inspection
30
Front Gearcase Lubrication
37
Transmission Lubrication
38
Shift Linkage Adjustment
39
Transmission Gearshift Adjustment
39
Throttle Operation
41
Idle Speed
42
Pilot Screw Adjustment
42
Fuel Filter
44
Fuel System
44
Carburetor Draining
45
Compression Test
46
Engine Mounts
46
Battery Maintenance
47
Ignition Timing
48
Spark Plug
48
Cooling System Hoses
49
Coolant Level Inspection
50
Radiator Coolant Level Inspection
50
Air Box Sediment Tube Service
52
Breather Filter Inspection
52
Breather Hose
52
Recoil Housing
53
Engine Oil Level
54
Oil Change/Filter
54
Valve Clearance
56
Exhaust Valve Clearance Adjustment
57
Intake Valve Clearance Adjustment
57
Exhaust Pipe
62
Brake Pad Inspection
63
Auxiliary Brake Testing
64
Front Suspension
65
Rear Suspension
65
Controls
66
Wheel Removal/Installation
67
Tire Inspection
68
Tire Pressure
68
Chapter 3 Engine
69
Torque Specifications
70
Torque Patterns
71
Piston Identification
72
Engine Service Data
73
Cooling System
75
Cooling System Specifications
76
Accessible Components
77
Engine Removal
78
Engine Installation Notes
79
Cleaning the Cylinder after Honing
80
Honing to Oversize
80
Crankshaft Straightening
81
EH42PL / EH50PL Engine Lubrication
84
EH42PL / EH50PL Engine Exploded View
85
Cam Chain Tensioner Inspection
87
Rocker Arm/Shaft Inspection
88
Camshaft Removal
90
Automatic Compression Release Installation
92
Camshaft Inspection
93
Cylinder Head Exploded View
94
Cylinder Head Inspection
95
Cylinder Head Warpage
95
Cylinder Head Disassembly
96
Valve Inspection
98
Combustion Chamber
99
Valve Seat Reconditioning
100
Cylinder Head Assembly
104
Valve Sealing Test
105
Piston Removal
108
Cylinder Inspection
109
Piston/Rod Inspection
111
Piston Ring Installed Gap
112
Crankcase Disassembly
113
Starter Drive Removal/Inspection
113
One Way Valve
116
Crankcase Separation
117
Oil Pump Removal/Inspection
118
Oil Pump Assembly
120
Counter Balancer Shaft Removal/Inspection
121
Crankshaft Removal/Inspection
122
Crankcase Bearing Inspection
123
Crankcase Inspection
124
Crankshaft End Play Adjustment
125
Counter Balancer Shaft End Play Adjustment
127
Pump Shaft Oil Seal Installation
128
Crankcase Assembly
129
Water Pump Mechanical Seal Installation
130
One Way Valve Installation
132
Piston Ring Installation
133
Piston Installation
134
Cylinder and Head Installation
135
Cylinder Installation
135
Cylinder Head Installation
136
Camshaft Installation and Timing
137
Camshaft Timing
137
Cam Chain Tensioner Installation
140
Oil Pipes
142
Thermostat Installation
142
Recoil Disassembly/Inspection
143
Recoil Assembly
145
Chapter 4 Fuel System/Carburetion
150
Jetting Guidelines
151
Main Jet Selection
151
Fuel Flow Diagram
153
Mikuni Jet Part Numbers
154
CV Carburetor System Function (4 Cycle)
155
Mikuni CV Carb Operation
156
Float System
158
Main System
158
Carburetor Cleaning
162
Carburetor Inspection
163
Carburetor Assembly
164
Float Height Adjustment
165
Fuel Level
166
Needle and Seat Leakage Test
166
Fuel Pump Exploded View
168
Troubleshooting
169
Chapter 5 Body and Steering
171
Body Assembly Exploded View
173
Cover/Panel Removal
174
Headlight Pod Exploded View
175
Side Panel Removal
176
Steering Assembly, Exploded View
177
A-Arm Replacement
178
Rear Suspension Assembly
179
Strut Assembly
180
Front Strut Cartridge Replacement
181
Ball Joint Replacement
182
Decal Replacement
183
Chapter 6 Pvt System
184
Steering Post Assembly
183
Chapter 5
184
Drive Clutch Operation
186
Driven Clutch Operation
186
PVT System Operation
186
Pvt Drying
187
PVT Maintenance/Inspection
187
Pvt Overheating
188
PVT Disassembly
189
PVT Assembly
191
PVT Sealing and Ducting Components
192
Drive Clutch Spring Specifications
194
Shift Weights
195
Button to Tower Clearance Inspection
196
Shift Weight Inspection
196
Drive Clutch Exploded View
197
Drive Clutch Inspection
197
Drive Clutch Disassembly
198
Spider Removal
199
Drive Clutch Assembly
201
Drive Belt Tension
202
Drive Belt Removal/Inspection
203
Drive Belt Installation
204
Clutch Alignment /Offset
205
Drive Clutch Bushing Service
206
Driven Clutch Disassembly/Inspection
210
Driven Clutch Assembly
213
EBS Theory of Operation
218
EBS Exploded View
220
Drive Clutch Inspection
221
Moveable Sheave Bushing Inspection
222
Troubleshooting
230
Chapter 7 Final Drive 7
232
Final Drive
233
Awd Operation Overview
234
Awd Front Hub Bearing Adjustment
237
Awd Front Hub Exploded View
238
Awd Hub Seal Replacement
239
Hilliard Clutch Disassembly/Inspection
241
AWD Armature Plate Inspection
242
Awd Front Drive Axle Removal
243
Awd Front Drive Axle Installation
244
Awd Front Drive Axle Exploded View
247
Awd Front Prop Shaft Removal
250
U-Joint Disassembly
251
U-Joint Assembly
252
Awd Front Housing Removal
254
Awd Front Housing Assembly
256
Awd Front Housing Exploded View
258
Rear Hub/Bearing Carrier Removal
259
Rear Hub Installation
261
Rear Hub Disassembly
262
Rear Hub Assembly
263
Rear Drive Shaft Removal
264
Rear Drive Shaft Installation
265
Rear Drive Shaft Service
266
Chapter 8 Transmission Service
269
Torque Specifications
270
Gear Shift Selector Disassembly
271
Gear Shift Selector Removal
271
Gear Shift Selector Assembly
273
Boot Replacement
274
Gear Shift Selector Installation
274
Transmission Removal
275
Transmission Installation
278
Transmission Disassembly
280
Transmission Exploded View
301
Troubleshooting Checklist
302
Chapter 9 Brakes
303
Troubleshooting
303
Specifications
304
Brake System Service Notes
305
Brake Pad Kits
305
Brake Noise Troubleshooting
306
Hydraulic Brake System Operation
307
Dual Hydraulic Caliper Bleeding
308
Fluid Replacement/Bleeding Procedure
310
Master Cylinder Disassembly
312
Master Cylinder Inspection
314
Master Cylinder Assembly
314
Master Cylinder Installation
316
Front Pad Removal
317
Front Pad Assembly
318
Front Disc Inspection
319
Front Caliper Removal
321
Front Caliper Disassembly
321
Front Caliper Inspection
322
Front Caliper Assembly
323
Front Caliper Installation
324
Rear Caliper Assembly
329
Troubleshooting
333
Chapter 10 Electrical
334
Chapter 9
334
Special Tools
335
Electrical Service Notes
335
High Beam Headlight Adjustment
336
Indicator Lamp Replacement
337
Timing Check Procedure
338
Typical Ignition Timing Curve
339
Flywheel Identification
340
Ignition System
342
Ignition System Troubleshooting
344
Battery Service
345
Battery Installation
346
Load Test
347
Specific Gravity Test
347
Off Season Storage
348
Charging Procedure
348
Charging System Testing
349
Starter System Troubleshooting
352
Voltage Drop Test
352
Starter System
353
Starter Motor Disassembly
354
Armature Testing
357
Starter Assembly
358
Starter Drive
359
Electronic Speedometer Troubleshooting
360
Fan Control Circuit Operation
368
Brake Light Switch
369
Etc Operation Test
371
Electrical Notes
372
4
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Polaris Sportsman 400 Specifications
General
Brand
Polaris
Model
Sportsman 400
Category
Offroad Vehicle
Language
English
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