Polaris 850 SKS 155 2020 User Manual

3.2
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
WATER PUMP ASSEMBLY VIEW .. . . .. . . .. . . .. . ... . .. .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . ... . ... . ... . .3.60
REED VALVE ASSEMBLY VIEW .. . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . ..3.62
FLYWHEEL REMOVAL / INSPECTION. . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . ..3.63
STATOR REMOVAL / INSPECTION .. . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . .3.64
STATOR INSTALLATION . . ... . ... . ... . ... . .. .. . ... . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ..3.65
FLYWHEEL INSTALLATION .. . ... . ... . .. .. . . .. . ... . ... . ... . ... . ... . . .. . ... . ... . .. . . .. . . ... . ... . ... . ..3.66
REED VALVE INSPECTION .. . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. .3.68
REED PETAL REPLACEMENT INSPECTION . . .. . . .. . . .. . . ... . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. .3.69
REED PETAL REMOVAL . . .. . . .. . ... . ... . ... . ... . ... . . .. . ... . ... . ... . ... . ... . ... . ... . ... . ... . .. . . ... .3.70
REED PETAL INSTALLATION . ... . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. .3.71
GENERAL INFORMATION - TOP END . ... . .. .. . ... . ... . .. . . ... . ... . ... . ... . ... . .. . . .. . . ... . ... . ... . ..3.73
CYLINDER HEAD REMOVAL . . .. . . ... . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. .3.73
CYLINDER HEAD INSPECTION . . ... . ... . ... . ... . . .. . . .. . ... . ... . ... . ... . ... . . .. . ... . ... . ... . .. . . ... .3.74
CYLINDER REMOVAL. . ... . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. . . .. . . ..3.75
CYLINDER INSPECTION . . ... . .. .. . . .. . . .. . . .. . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . ... . ..3.76
CYLINDER HONING. . .. . . .. . . .. . . .. . . .. . ... . ... . . .. . . .. . . .. . . .. . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . .3.77
PISTON REMOVAL. . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . .3.78
PISTON MARKINGS. . .. . . .. . . .. . . .. . . .. . .. .. . . .. . . .. . . .. . ... . ... . ... . .. .. . . .. . ... . ... . ... . ... . ... . . ..3.79
PISTON INSPECTION . . . .. . . .. . . .. . . .. . . .. . . .. . ... . . .. . . .. . . .. . . .. . . .. . ... . ... . .. .. . . .. . ... . ... . ... . .3.79
PISTON RING MARKINGS . . . .. . . .. . . .. . . ... . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . .3.80
PISTON RING INSTALLED GAP . . ... . ... . ... . .. . . ... . ... . ... . ... . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. . .3.80
PISTON NEEDLE BEARING .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . ..3.81
GENERAL INFORMATION - BOTTOM END . . .. . ... . ... . ... . ... . ... . . .. . ... . ... . .. . . ... . ... . ... . ... . ..3.82
CRANKCASE DISASSEMBLY .. . . .. . . .. . ... . .. .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . ... . ... . ... . ... . ... .3.82
CRANKSHAFT REMOVAL . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . ... . . .. . . .. . . .. . . .. .3.83
LOWER CRANKCASE CROSS SHAFT GALLERY INSPECTION . . ... . ... . ... . ... . ... . ... . ... . .. . . ... .3.84
LOWER CONNECTING ROD BEARING INSPECTION . .. . ... . .. .. . . .. . . .. . . .. . ... . ... . ... . .. .. . ... . ..3.85
MAIN BEARING INSPECTION .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . ... . . .. . . .. . . .. . . .. . . .. . ... . ... . . .. . .3.85
PTO BEARING INSPECTION ... . ... . . .. . ... . ... . .. . . ... . ... . ... . ... . ... . ... . .. . . .. . . ... . ... . ... . ... . .3.86
CRANKSHAFT TRUING . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . .. .. . . .. . . .. . . .. . ... . ... . .. .. .3.87
CRANKSHAFT RUNOUT INSPECTION. .. . . .. . . .. . . ... . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . ..3.88
CRANKSHAFT INDEX . . ... . .. .. . . .. . . .. . ... . ... . ... . .. .. . ... . ... . ... . .. . . ... . ... . ... . ... . ... . .. . . .. . .3.88
WATER PUMP REMOVAL . ... . ... . ... . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. . . .. . . ... . .. . . .. . . .. . . .. .3.89
WATER PUMP INSTALLATION . ... . . .. . . .. . . .. . ... . ... . ... . ... . ... . . .. . ... . ... . .. . . ... . ... . ... . ... . ..3.92
CRANKSHAFT INSTALLATION . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . ... . . .3.94
CRANKCASE ASSEMBLY ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . ..3.96
PISTON INSTALLATION .. . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. .3.97
CYLINDER INSTALLATION . . . ... . ... . ... . ... . .. . . .. . . .. . . ... . ... . ... . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . .3.98
CYLINDER HEAD INSTALLATION . . .. .. . ... . ... . .. . . ... . ... . ... . ... . ... . ... . .. . . .. . . ... . ... . ... . ... . .3.99
RECOIL ASSEMBLY VIEW .. . . .. . ... . ... . ... . .. . . ... . ... . ... . ... . ... . .. . . .. . . ... . ... . ... . ... . .. . . .. 3.100
RECOIL HOUSING REMOVAL.. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. . ... . . .. . . .. . . .. . . .. . . .. . ... . ... . . .. 3.101
RECOIL HOUSING DISASSEMBLY . . . .. . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . ... . ... . ... 3.101
RECOIL HOUSING ASSEMBLY . .. . . .. . . .. . . .. . ... . ... . .. .. . . .. . ... . ... . ... . ... . ... . ... . ... . ... . ... 3.102
RECOIL HOUSING INSTALLATION. .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. . . .. . . ... . .. . . .. . . .. . . .. . . .. . . 3.104
E-VES-II OVERVIEW . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. . . .. . . ... . .. . . .. . . .. . . .. . . .. . . .. . . .. . . .. 3.105
E-VES-II ASSEMBLY VIEW . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. . . .. . . ... . ... . .. . . .. . . .. . . .. . . .. . . ... 3.107
E-VES-II OPERATION NOTES . . ... . . .. . . .. . . .. . ... . ... . ... . ... . . .. . . .. . ... . ... . .. . . ... . ... . . .. . ... . 3.108
E-VES-II REMOVAL . . .. . . .. . . .. . . .. . . .. . .. .. . . .. . . .. . . .. . ... . ... . ... . . .. . . .. . . .. . ... . ... . ... . ... . . . 3.112
ENGINE / COOLING / EXHAUST

Polaris 850 SKS 155 2020 Specifications

General

Brand	Polaris
Model	850 SKS 155 2020
Category	Snowmobiles
Language	English