Torque Specifications; Pvt System Overview; General Operation; Drive Clutch Operation - Polaris Ranger RZR XP 900 2011 Service Manual

CLUTCHING (PVT)
SPECIAL TOOLS AND SUPPLIES
TOOL DESCRIPTION PART NUMBER
Drive Clutch Puller 2872085
Clutch Holding Wrench 9314177
Clutch Holding Fixture 2871358-A
Spider Jam Nut Socket PU- 50578
Drive Clutch Spider Removal and
2870341
Installation Tool
Roller Pin Tool 2870910
Clutch Bushing Replacement
2871226
Tool Kit
Piston Pin Puller 2870386
Driven Clutch Compression Tool PU-50518
Clutch Bushing Replacement
2871025
Tool Kit
SPECIAL SUPPLIES PART NUMBER
Loctite® 609™ and 263™ N/A
RlV Silicone Sealer 8560054
TORQUE SPECIFICATIONS
PVT System Fastener Torques
ITEM TORQUE VALUE
Drive Clutch Retaining Bolt 96 ft. Ibs. (130 Nm)
Driven Clutch Retaining Bolt 40 ft. Ibs. (54 Nm)
PVT Inner Cover Bolts 12 ft. Ibs. (16 Nm)
PVT Outer Cover Screws 45-50 in. Ibs. (5-5.6 Nm)
Spider Jam Nut
250 ft. Ibs. (339 Nm)
(Apply 263 Loctite)
Drive Clutch Spider 280-300 ft. Ibs.
(Apply 263 Loctite) (379-406 Nm)
Drive Clutch Cover Plate 100 in. Ibs. (12 Nm)
6.2
PVT SYSTEM OVERVIEW
General Operation
A
WARNING
All PVT maintenance or repairs should be performed by
a certified Polaris Master Service Dealer (MSD)
technician who has received the proper training and
understands the procedures outlined in this manual.
Because ofthe critical nature and precision balance
incorporated into the PVT components, it is
absolutely essential that no disassembly or repair
be made without factory authorized special tools
and service procedures.
The Polaris Variable Transmission (PVT) consists of three
major assemblies:
1) The Drive Clutch
2) The Driven Clutch
3) The Drive Belt
The internal components of the drive clutch and driven clutch
control engagement (initial vehicle movement), clutch upshift
and backshift. During the development of the Polaris vehicle,
the PVT system is matched first to the engine power curve; then
to average riding conditions and the vehicle's intended usage.
Therefore, modifications orvariations ofcomponents at random
are never recommended. Proper clutch setup and careful
inspection of existing components must be the primary
objective when troubleshooting and tuning.
Drive Clutch Operation
Drive clutches primarily sense engine RPM. The two major
components which control its shifting function are the shift
weights and the coil spring. Whenever engine RPM is
increased, centrifugal force is created, causing the shift
weights to push against rollers on the moveable sheave, which
is held open by coil spring preload. When this force becomes
higher than the preload in the spring, the outer sheave moves
inward and contacts the drive belt. This motion pinches the
drive belt between the spinning sheaves and causes it to rotate,
which in tum rotates the driven clutch.
At lower RPM, the drive belt rotates low in the drive clutch
sheaves. As engine RPM increases, centrifugal force causes the
drive belt to be forced upward on drive clutch sheaves.
9923144 - 2011 RANGER RZR XP 900 Service Manual
© Copyright 2011 Polaris Sales Inc.