Everything You Need to Know About Can-Am Defender Secondary Clutches

Introduction to Can-Am Defender Secondary Clutches

The Can-Am Defender is a popular side-by-side utility terrain vehicle (UTV) known for its power, performance and rugged durability. One of the most important components of the Can-Am Defender drivetrain is the secondary clutch, which plays a vital role in transferring engine power to the wheels.

A secondary clutch is part of the continuously variable transmission (CVT) system that utilizes a belt and pulley system to achieve seamless, infinite gear ratios for smooth acceleration and deceleration. The secondary clutch is located behind the primary clutch and is connected to the drive axles and wheels.

Understanding how secondary clutches work on the Can-Am Defender, as well as knowing how to maintain and repair them, is important for getting the most out of your machine. Proper clutch setup and maintenance will provide optimal performance and belt life.

How Secondary Clutches Work

The Can-Am Defender uses a secondary clutch with weights and ramps to control engagement speed and belt clamping force. At low RPMs, the weights in the clutch are thrown outward due to centrifugal force. This presses the moveable sheave against the stationary sheave using inclined ramps, squeezing the belt tighter.

As engine RPMs increase, the clamping force continues to intensify, reaching its maximum just before peak power RPM. This maintains a consistent ratio between engine and CVT output speed. It also keeps the belt tight to avoid slippage under high loads.

Conversely, as RPMs decrease, the weights retract inward, allowing the moveable sheave to shift away from the stationary sheave. This reduces the clamping force on the belt so the transmission can downshift smoothly.

The stiffer the secondary spring, the higher the RPMs need to reach before the weights push the moveable sheave out. A softer spring means the clutch engages at lower RPMs for quicker response.

Benefits of Secondary Clutches

Here are some key benefits secondary clutches provide on Can-Am Defenders and other CVT-equipped UTVs:

• Smoother Acceleration: The variable pulley ratio allows the engine to stay in its optimal RPM range.
• Increased Performance: Constant belt grip prevents slippage and power loss.
• Fuel Efficiency: The engine can run at lower RPMs during steady speeds.
• Easy Operation: No need to shift gears manually.
• Custom Tuning: Clutch kit springs allow altering engagement RPMs.

Maintaining and Repairing Secondary Clutches

Like other drivetrain components, proper maintenance is key to maximizing secondary clutch life and performance. Here are some tips:

Inspection and Cleaning

Visually inspect clutches periodically for signs of wear, glazing, cracks, chips or other damage. Remove any mud or debris buildup on the sheaves or spider assemblies. Replace worn belt if needed.

Clutch Alignment

Misalignment causes uneven belt wear and slippage. Use a straightedge to check for proper sheave alignment. Adjust if needed to realign clutch faces.

Clutch Rebuilds

Over time, clutch components like weights, bushings and bearings wear out. Complete clutch rebuilds or replacements may be needed to restore performance. Use OEM or high quality aftermarket parts.

Tuning and Upgrades

Heavier clutch springs, different weight configurations and adjustable components like helix kits allow custom clutch tuning. This can optimize engagement RPMs for specific uses.

Belt Condition

Inspect CVT belt for cracks, uneven wear, glazing or edge fraying. Replace belt if needed according to maintenance intervals. Proper belt condition is critical.

Troubleshooting Common Secondary Clutch Problems

Here are some common Can-Am Defender secondary clutch issues and fixes:

No Engagement

If the clutch doesn't engage properly, check the spring condition and that the moveable sheave can slide freely. Worn bushings, bearings or ramps can prevent engagement.

Late Engagement

Soft clutch springs or heavy/worn weights will delay engagement. Stiffer springs or lighter weights can restore normal engagement RPMs.

Slipping Belt

Insufficient clamping force from a worn belt, glazed sheaves or weak springs can cause belt slip. Address worn components and deep clean sheave surfaces.

Rough Takeoff

Harsh engagement typically indicates improper clutch alignment. Realign the clutches to prevent uneven belt wear. Worn components can also cause rough engagement.

Overheating

Slipping belts, misaligned or damaged clutches, and incorrect tuning can overheat the clutches. Address these issues to maintain proper running temperatures.

Finding Replacement Clutch Components

Genuine OEM Can-Am Defender clutch parts can be purchased from Can-Am dealerships. Many reputable aftermarket brands also offer clutch components, springs, helix kits and CVT belts for Defenders.

Quality clutch components optimized for the Defender's engine output are recommended for proper drivetrain performance and longevity. Consult your owner's manual for correct part numbers and specifications.

Aftermarket Clutch Manufacturers

Here are some reputable aftermarket clutch brands offering components for the Can-Am Defender:

• EPI Performance
• HiFloFiltro
• DynoJet
• Stage 3 Motorsports
• Polaris
• QuadBoss

Professional Clutch Servicing

While home mechanics can tackle basic clutch inspection, cleaning and tuning, it's advisable to have professional clutch rebuilds, installations and alignment performed by an experienced CVT shop or dealer technician.

This ensures proper assembly, shimming, alignment and tuning for optimal drivetrain performance. Trying to DIY advanced clutch repairs without proper tools, knowledge and experience can lead to bigger problems down the road.

Maintaining Your Can-Am Defender's Clutch System

As a critical drivetrain component, proper maintenance and repair of the Can-Am Defender's secondary clutch will deliver the best performance, fuel efficiency and longevity from your machine. Perform regular belt, clutch and alignment inspections along with timely repairs.

Consider quality clutch upgrades and professional servicing when needed. Understanding how secondary clutches function allows you to properly operate, maintain and troubleshoot issues on your Defender for miles of off-road adventure.

FAQs

What is the purpose of the secondary clutch?

The secondary clutch is part of the CVT system that provides variable gear ratios for smooth acceleration/deceleration. It controls belt grip and transfers engine power to the wheels.

How can I tell if my secondary clutch is worn out?

Signs include delayed or irregular engagement, belt slippage, rough takeoff, overheating and lack of power. Visually inspect for damage, glazing and wear.

What basic maintenance should be done on the secondary clutch?

Regularly inspect the belt condition, clean clutch components, check alignment, lubricate as needed, and watch for signs of damage or abnormal wear.

When should the secondary clutch be rebuilt or replaced?

Typically every few thousand miles or whenever worn components like bearings, bushings and weights are negatively impacting performance.

Where can I purchase OEM or aftermarket clutch parts?

Can-Am dealerships sell OEM parts. Aftermarket parts are available from brands like EPI, DynoJet, Polaris, HiFloFiltro, QuadBoss, and Stage 3.