Null Tundra R, Skandic LT, Skandic WT, Skandic SWT, Skandic WT LC snowmobile User manual
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Tundra R, Skandic LT, Skandic WT, Skandic SWT, Skandic WT LC are snowmobiles that are designed for a variety of riding conditions. The Tundra R is a high-performance snowmobile that is ideal for trail riding and off-trail adventures. The Skandic LT is a versatile snowmobile that is suitable for both trail riding and utility work. The Skandic WT is a heavy-duty snowmobile that is built for hauling and pulling. The Skandic SWT is a sport utility snowmobile that combines the performance of a trail machine with the utility of a work machine. The Skandic WT LC is a lightweight snowmobile that is perfect for riders who want a machine that is easy to handle and maneuver.
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Section 07 REAR SUSPENSION
Subsection 01 (TABLE OF CONTENTS)
TABLE OF CONTENTS
0
SUPPLEMENT
07-01-1
MMR2002_039_07_01ATOC.FM
Section 07 REAR SUSPENSION
Subsection 02 (TORQUE REACTION SUSPENSION)
0
TORQUE REACTION SUSPENSION
Tundra R
5
24 Nm
(18 lbfft)
1
Runner
24 Nm
(18 lbfft)
2 3
Loctite 271
4
24 Nm
(18 lbfft)
48 Nm
(35 lbfft)
Loctite
271
6
11 Nm
(97 lbfin)
48 Nm
(35 lbfft)
7
11 Nm
(97 lbfin)
2.5 Nm
(23 lbfin)
10
A05F11S
3 Nm
(27 lbfin)
9
11
7
24 Nm
(18 lbfft)
Loctite
271
24 Nm
(18 lbfft) Loctite 271
MMR2002_029_07_02A.FM
07-02-1
Section 07 REAR SUSPENSION
Subsection 02 (TORQUE REACTION SUSPENSION)
COMPONENT REMOVAL
Lift rear of vehicle and support it off the ground.
5, Rear Arm
Release track tension.
Release spring tension. Unfasten shock from rear arm. Remove 3 screws retaining rear arm.
SUSPENSION ASS’Y REMOVAL
Release track tension.
NOTE: To prevent cross shaft from turning when unscrewing screws assembled with threadlocker, proceed as follows:
– Loosen one screw then retighten.
– Remove the other screw.
– Remove the first one.
1,2,3,4, Cross Shaft, Idler Wheel, Spacer and Screw
Remove idler wheel ass’y.
Suspension Ass’y
Lift rear of vehicle and support it off the ground.
Unscrew 4 screws retaining front arm and rear arm to frame.
Remove suspension.
DISASSEMBLY AND ASSEMBLY
6, Stopper Strap
When assembling make sure it is attached through the 3 rd hole from the end. Torque nut to 11 N•m
(97 lbf•in).
A
A05F0CA
1. 1 st hole
2. 3 rd hole
A. 11 N•m (97 lbf•in)
1 2
9,10,12, Nut, Slotted Screw and Slider
Shoe
To replace a worn shoe, remove the front screw and stop nut, then slide the shoe rearward out of the runner.
1
A05F0IC
1. Front screw and nut
CAUTION: Slider shoes must always be replaced in pairs.
07-02-2
MMR2002_029_07_02A.FM
Section 07 REAR SUSPENSION
Subsection 02 (TORQUE REACTION SUSPENSION)
7,8, Support and Front Arm Support
To remove rivets securing the supports, cut rivet heads off using a cold chisel.
At assembly, position the rivet head toward the outside of the assembly. Support the rivet head against a metal block, as shown, and use a flat head punch to secure the rivet in place.
1
2
3
4
A07F02A
1. Flat head punch
2. Support
3. Runner
4. Metal block
NOTE: Rivets can be substituted with 3/16 in x 3/4 in long screws and flanged elastic stop nuts. Always position screw head outside the assembly.
INSPECTION
6, Stopper Strap
Inspect strap for wear or cracks, bolt and nut for tightness. If loose, inspect hole for deformation.
Replace as required.
Shock Absorber
Refer to SUSPENSION AND SKI SYSTEM for shock inspection.
11, Slider Shoe
Molding line is the wear limit indicator.
A03F3SA
1
TYPICAL
1. Slider shoe
2. Molding line (wear limit indicator)
2
Replace slider shoes when wear limit is reached.
CAUTION: Slider shoes must always be replaced in pairs.
SUSPENSION ASS’Y
INSTALLATION
Release rear spring tension then install assembled suspension into track with front portion first.
Insert rear portion of suspension into track.
Bolt suspension to tunnel.
Pry rear spring end onto cam.
1
A05F0JA
1. Spring end
Adjust track tension/alignment. Refer to TRACK.
MMR2002_029_07_02A.FM
07-02-3
Section 07 REAR SUSPENSION
Subsection 02 (TORQUE REACTION SUSPENSION)
RIDE ADJUSTMENT
The front portion of rear suspension is adjustable for surface condition and steering effects.
The stopper strap is adjustable for vehicle weight transfer control.
The rear portion of rear suspension is adjustable for driver’s weight.
1
The stiffest adjustment is reached when the supporting edge of cam is the farthest to hexagonal portion of cam.
1
A05F0AA
2 3
1. Driver’s weight
2. Stopper strap for weight transfer
3. Steering effect/surface condition
4. Adjustment cams
4
Choice of suspension adjustments depends on carrying load, driver’s weight, personal preference, riding speed and field condition.
Slight suspension bottoming occurring under the worst riding conditions indicates a good choice of spring preload.
To adjust rear suspension adjustment cams, use special key supplied in vehicle tool box.
Turning adjustment cam moves edges of cam supporting spring rod. The softest adjustment is reached when the supporting edge of cam is the closest to hexagonal portion of cam.
1
2
A05F0NA
STIFFEST ADJUSTMENT
1. Supporting edge farthest to hexagonal
NOTE: To quickly change rear cam position without using any tool:
– Lay vehicle on its side.
– Unhook rear spring by hand from lower idler wheel.
1
A05F0FA
2
– Turn adjustment cam by hand to the desired position.
– Reinstall spring on its support making sure that it sits in the groove of support.
A05F0MA
SOFTEST ADJUSTMENT
1. Supporting edge closest to hexagonal
2. Spring
07-02-4
MMR2002_029_07_02A.FM
Section 07 REAR SUSPENSION
Subsection 02 (TORQUE REACTION SUSPENSION)
Stopper Strap
The function of the stopper strap is to control the transfer of vehicle weight during acceleration and to control track lead angle.
The longer the belt, the more the weight will be transferred to the track to provide a better traction.
The shorter the belt, the lesser the weight transferred to the track, thus maintaining a more positive steering.
The longer the belt, the greater will be the track lead angle. A shorter belt will reduce track lead angle which may help when negotiating a particular snow condition.
Adjusting holes on the stopper strap allow to adjust it according to driver’s requirements, field and/or snow conditions.
CAUTION: Whenever stopper strap length is changed, track tension must be readjusted to prevent any possibility of operating vehicle with a too loose or too tight track tension.
For normal use, locate bolt through 3 rd hole from strap end.
WARNING
Always torque the nut to 11 N•m (97 lbf•in). Replace strap if worn or torn.
Deep Snow Operation
When operating the vehicle in deep snow, it may be necessary to change position of adjustment cams, stopper strap and/or driver’s riding position, to change the angle at which the track rides on the snow. Operator’s familiarly with the various adjustments as well as snow conditions will dictate the most efficient combination.
LUBRICATION
Lubricate front and rear arms at grease fittings using synthetic grease (P/N 413 711 500).
NOTE: There are 4 grease fittings.
A
A05F0GA
A05F0CA
1. 1 st hole
2. 3 rd hole
A. 11 N•m (97 lbf•in)
1 2
NOTE: When towing a load, it is suggested to adjust stopper strap to its shortest length, soften front springs of rear suspension and stiffen rear springs.
These adjustment will improve steering ability.
MMR2002_029_07_02A.FM
07-02-5
Section 07 REAR SUSPENSION
Subsection 03 (SKANDIC WT SUSPENSION)
0
SKANDIC WT SUSPENSION
Skandic LT/WT/SWT/WT LC
1
3
2
5
6
7
4
A22F18T
TYPICAL
MMR2002_030_07_03A.FM
07-03-1
Section 07 REAR SUSPENSION
Subsection 03 (SKANDIC WT SUSPENSION)
REMOVAL
Release track tension.
Lift rear of vehicle and support it off the ground.
Unbolt front arm then rear arm.
Self-Locking Screws
CAUTION: These self-locking screws must always be replaced by new ones everytime they are removed.
NOTE: To prevent axle from turning when unscrewing self-locking screws, proceed as follows:
– Remove one self-locking screw then install a
10 mm shorter non-self-locking one in place.
Torque as specified in exploded view.
– Remove the opposite self-locking screw.
– Remove the temporary installed non-self-locking screw.
– If it doesn’t work, heat bolt head to melt threadlocker.
Remove suspension assembly.
A22F19A
1. Support
1
2, Conical Washer
At installation, position conical washers as shown.
11 11 2 2 3 3 3 4
A22F1AA
WASHER QUANTITY AND MOUNTING POSITION
A22F1EA
DISASSEMBLY AND ASSEMBLY
1, Extension
Remove nuts and conical washers from the eye bolt adjuster. Remove bolt retaining eye bolt adjuster to support.
Remove rear idler wheel on appropriate side.
Remove idler wheel from support.
Unbolt extension from its support.
A22F1BA
Tighten nut 3/4 turn after contacting washers for better deep snow performance. Maximum preload is 3 turns after nut touching washers. This last adjustment is for trail riding with or without a load and for pulling a load.
07-03-2
MMR2002_030_07_03A.FM
Section 07 REAR SUSPENSION
Subsection 03 (SKANDIC WT SUSPENSION)
4, Rear Spring
Remove top idler wheels.
Unscrew one end of shock.
Remove spring.
5, Front Spring
Remove circlips retaining spring support to top and bottom of front arm.
Holding spring end, remove lock pin of top spring support then bottom support lock pin.
Unbolt front idler wheel axle.
Remove idler wheel on side where axle retaining plate is not welded.
Remove springs.
Rivets can be substitued by M8 x 20 bolts and nuts.
3, Horse-Shoe Washer
For deep snow riding, do not install washer.
For trail riding with passenger and/or weight, install
1 washer under each rubber stoppers.
For trail riding with heavy load and/or pulling a load, use 2 washers under each rubber stoppers.
7, Shock
Install shock with its rod upward.
SHOCK ABSORBER SERVICING
Secure the shock body end in a vise.
1
A22F1CA
1. Circlips
1
6, Support Plate
Drill rivets to remove support plate. Use a 8 mm
(21/64 in) drill bit.
A14F0BA
TYPICAL
1. Clamp
CAUTION: Do not clamp directly on shock body.
Examine each shock for leaks. Extend and compress the piston several times over its entire stroke then check that it moves smoothly and with uniform resistance.
Pay attention to the following conditions that will denote a faulty shock:
– A skip or a hang back when reversing stroke at mid travel.
– Seizing or binding condition except at extreme ends of stroke.
– Oil leakage.
– A gurgling noise, after completing one full compression and extension stroke.
Renew if any fault is present.
A22F1DA
MMR2002_030_07_03A.FM
07-03-3
Section 07 REAR SUSPENSION
Subsection 03 (SKANDIC WT SUSPENSION)
INSTALLATION
Threaded holes must be cleaned before a self-locking screw is installed. Use a metal brush or a screwtap to clean the hole properly then use a solvent (Methyl-
Chloride), let act during 30 minutes and wipe off.
The solvent utilization is to ensure the adhesive works properly.
Use a tie-down between front arm and spring axle to ease installation of front arm screws.
A22F1FA
RIDE ADJUSTMENT
Refer to Operator’s Guide.
07-03-4
MMR2002_030_07_03A.FM
DRIVE AXLE
Tundra R
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
0
2
3
12
11
9
8
Synthetic grease
9
6
5
A05D1BS
MMR2002_031_07_04A.FM
07-04-1
A29D2GS
07-04-2
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
Skandic LT
12
8
Synthetic grease
6
13
9
13
11
5 14
2
4
7
1
10
Synthetic grease
MMR2002_031_07_04A.FM
Skandic WT/SWT/WT LC
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
A29D2HS
13
5
9
13
2
3
6
MMR2002_031_07_04A.FM
4
Loctite 271
07-04-3
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
REMOVAL
Tundra R and Skandic LT
Drain oil from chaincase. Release drive chain tension. Remove chaincase cover.
Raise and block rear of vehicle off the ground.
Remove suspension. Refer to SUSPENSION.
2,8, End Bearing Housing and Seal
Remove cable protector no. 7, and plastic bearing cover. Remove circlip no. 14 from drive axle.
Remove chain and sprocket then circlip and bearing no. 12 from drive axle.
Pry oil seals from chaincase and end bearing housing.
6,9,13, Drive Axle and Sprocket
Release drive axle sprocket from track and at the same time, pulling the drive axle towards the end bearing housing side.
Remove drive axle from vehicle.
Skandic WT/SWT/WT LC Only
Drain gearbox.
Remove angle drive no. 1 and square pin no. 4.
Raise and block rear of vehicle off the ground.
Remove suspension. Refer to SKANDIC WT SUS-
PENSION.
Remove muffler. Unfasten screw from drive axle end. Loosen Allen screw on bearing race.
1
Remove 3 screws retaining ball bearing housing then, remove inner plate no. 3.
Remove drive axle.
DISASSEMBLY
4, Speedometer Drive Insert
Remove speedometer drive insert.
5,12, Bearing
To remove bearings, use puller assembly, ring and half rings as illustrated.
A00C44A
9,13, Sprocket and Half-Sprocket
To remove press fit sprockets, use a press and a suitable support as illustrated.
A22D15B
1. Allen screw
2. Screw
07-04-4
2
1
A00F06A
TYPICAL
1. Support sprocket near hub
NOTE: Two different types of sprocket press fit can be found. Ensure to replace ring reinforced sprockets with the same type.
MMR2002_031_07_04A.FM
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
ASSEMBLY
8,9,13, Drive Axle and Sprocket
To assemble press fit sprockets, use a press and a suitable pipe as illustrated. Sprockets must be assembled according to the following dimensions.
Skandic LT
1
A
B
C
A29D1UA
A. 47.0 mm (1.850 in)
B. 148.0 mm (5.827 in)
C. 271.0 mm (10.669 in)
D. 372.0 mm (14.646 in)
D
Skandic WT/WT LC
A00F07A
1. Pipe
Tundra R
A B
2
1
A29D1VA
1. Gearbox side
A. 55.0 mm (2.165 in)
B. 157.0 mm (6.181 in)
C. 399.0 mm (15.709 in)
D. 501.0 mm (19.724 in)
Skandic SWT
3
A00F08B
TYPICAL
1. Chaincase side
2. Center line of sprocket
3. Drive axle end
A. 83.0 mm (3-17/64 in)
B. 237 mm (9-21/64 in)
1
1
A29D1WA
1. Gearbox side
A. 105.0 mm (4.016 in)
B. 207.0 mm (8.150 in)
C. 449.0 mm (17.677 in)
D. 551.0 mm (21.693 in)
D
C
B
A
D
C
B
A
MMR2002_031_07_04A.FM
07-04-5
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
All Models
Ensure to align indexing marks of each sprocket when assembling.
1
A24D05A
TYPICAL
1. Indexing marks aligned
The maximum desynchronization for the sprockets is 1.5 mm (1/16 in).
To check this tolerance, place axle assembly on a plane surface and measure the gap between sprocket tooth and surface.
1. Grease seal type
2. Oil seal type
11, Bearing Protector
At assembly, flat side of bearing protector must be against bearing.
5,12, Bearing
Always push bearing by inner race.
1 A
A00F0AA
1. Plane surface
A. 1.5 mm (1/16 in) MAXIMUM
CAUTION: The same sprocket must not be pressed twice on the axle. If synchronization is found to be defective, use a new sprocket.
6,8, Drive Axle and Seal
When assembling drive axle, always position a new seal on each end of drive axle (if applicable).
Locate seal lip as illustrated.
A00F0DA
The bearing on the splined side of axle must be pushed until it is seated on shaft shoulder. The end bearing housing bearing must be flush with end of drive axle. Each bearing must have its shield facing the sprocket.
1 1
2
A00F05A
1. Bearing shield on this side
2. Flush with drive axle
3. Seated on shaft shoulder
3
07-04-6
MMR2002_031_07_04A.FM
Section 07 REAR SUSPENSION
Subsection 04 (DRIVE AXLE)
INSTALLATION
Position drive axle assembly into location. Install end bearing housing. Install spacer (if applicable) between bearing and lower chaincase sprocket.
Install chaincase and position seals (if applicable), making sure that a gap of approximately 2 mm
(1/16 in) exists between end of bearing housing and each seal.
3 A
1
4
2
LUBRICATION
15, Grease Fitting
Lubricate end housing bearing with synthetic grease
(P/N 513 711 500).
ADJUSTMENT
Sprocket/Track Alignment
CAUTION: Do not tamper with sprocket/track alignment if frame or suspension is damaged.
Sprockets might be repositioned to fit lugs without removing drive axle.
Use drive axle sprocket adjuster kit (P/N 861 725
700).
A00F0GA
SIDE VIEW
1. Bearing
2. Seal
3. Housing
4. Seal lip
A. 2 mm (.080 in) approximately
3, Retainer Ring
Make sure that welded nuts are toward inside of tunnel.
Lock drive axle sprocket with a circlip.
Reinstall the chaincase cover.
Refill with chaincase oil. Refer to TECHNICAL DATA.
Install the suspension. Refer to TRACK and adjust track tension and carry out track alignment procedure.
TYPICAL
MMR2002_031_07_04A.FM
07-04-7
Section 07 REAR SUSPENSION
Subsection 05 (TRACK)
TRACK
TRACK TYPE APPLICATION
Refer to TECHNICAL DATA section.
GENERAL
This section gives guidelines for track removal.
Some components require more detailed disassembly procedures. In these particular cases, refer to the pertaining section in this manual.
INSPECTION
Visually inspect track for:
– cuts and abnormal wear
– broken rods
– broken or missing track cleats.
If track is damaged or rods are broken, replace track. For damaged or missing cleats, replace by new ones.
WARNING
Do not operate a snowmobile with a cut, torn or damaged track.
REMOVAL
Tundra R
Remove the following items:
– chaincase cover, sprockets, chain
– muffler
– upper center idler ass’y
– suspension
– end bearing housing
– drive axle seal
– drive axle (outwards from end bearing housing)
– track.
0
Skandic LT
Remove the following parts:
– speedometer cable
– muffler
– chaincase cover
– suspension
– drive axle seal
– end bearing housing
– sprockets and chain
– drive axle (toward end bearing housing)
– track.
Skandic WT/SWT/WT LC
Remove the following parts:
– rear suspension
– muffler.
Drain gearbox.
Remove drive axle then track.
INSTALLATION
All Models
Reverse the removal procedure.
NOTE: When installing the track, respect rotation direction indicated by an arrow on track thread.
Check sprocket/track alignment as described in
DRIVE AXLE.
Track Tension and Alignment
Track tension and alignment are inter-related. Do not adjust one without checking the other. Track tension procedure must be carried out prior to track alignment.
07-05-1
MMR2002-032_07_05A.FM
Section 07 REAR SUSPENSION
Subsection 05 (TRACK)
Tension
Lift the rear of vehicle and support with a mechanical stand. Allow the slide to extend normally. Check the gap halfway between front and rear idler wheels. Measure between slider shoe and bottom inside of track.
When using the track tension gauge (P/N 529 021
500), slide U-shape extrusion to proper deflection.
Refer to TECHNICAL DATA.
NOTE: Lightly oil track tension gauge center pin to avoid sticking.
CAUTION: Too much tension will result in power loss and excessive stress on suspension components. If too loose, the track will have a tendency to thump.
To adjust, loosen the rear idler wheel retaining screws then loosen or tighten the adjuster bolts located on the inner side of the rear idler wheels.
1
40
45
50
2
1
A01B4JA
1. Example: 45 mm
2. Extrusion
Insert preset gauge between slider shoe and track.
Allow gauge to settle by forcing track up and down. Track tension is as specified when edge of gauge reaches line.
2
A19F05A
TYPICAL
1. Retaining screw
2. Adjuster bolt
Alignment
WARNING
Before checking track tension, ensure that the track is free of all particles which could be thrown out while it is rotating. Keep hands, tools, feet and clothing clear of track. Ensure no one is standing in close proximity to the vehicle.
A01B4KA
TYPICAL
1. Line
1
07-05-2
MMR2002-032_07_05A.FM
Section 07 REAR SUSPENSION
Subsection 05 (TRACK)
All Models
With rear of vehicle supported off the ground, start engine and allow the track to rotate slowly.
Check that the track is well centered; equal distance on both sides between edges of track guides and slider shoes.
1
2
1
3
A01F05A
1. Guides
2. Slider shoes
3. Equal distance
WARNING
Before checking track alignment, ensure that the track is free of all particles which could be thrown out while track is rotating. Keep hands, tools, feet and clothing clear of track.
To correct, stop engine then tighten the adjuster bolt on side where guides are farthest to slide. Recheck alignment.
1 2 1
A19F05B
TYPICAL
1. Retighten
Restart engine, rotate track slowly and recheck alignment.
Track Cleat
Removal
– Raise rear of vehicle off the ground and lift snow guard then rotate track to expose a cleat to be replaced.
– Using track cleat remover (P/N 529 028 700) for all models.
Installation
NOTE: Keep the same pitch between guide cleats.
– Place new cleat in position and using small track cleat installer (P/N 529 028 800) bend cleat then push tabs into rubber.
3
A01F0BA
1. Guides
2. Slider shoes
3. Tighten on this side
NOTE: Torque retaining screw to 48 N•m (35 lbf•ft) after adjustment.
Tighten the idler wheel retaining screws.
1
A01B4UA
TYPICAL
1. First step
2. Second step (to push tabs into rubber)
2
MMR2002-032_07_05A.FM
07-05-3
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Key Features
- Rear suspension
- Track type application
- Drive axle
- Track tension and alignment
- Track cleat
- Shock absorber servicing
Related manuals
Frequently Answers and Questions
How to adjust track tension?
How to check sprocket/track alignment?
How to remove track cleat?
How to install track cleat?
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