Cub Cadet SLTX1000 Series - Manual (Page 99)

CVT DRIVE AND BRAKE SYSTEM
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About this chapter
The drive and brake systems for the Cub Cadet Series 1000 tractor are combined. Two reasons for this:
• The brake on the Series 1000 tractor is supplied with the transaxle.
• The brake pedal applies the brake and disengages the drive system. Both systems share common link-
age.
The transaxle used in the Cub Cadet Series 1000 is a relatively simple gearbox containing forward, neutral, and
reverse gears. The variation in speed is all handled by the variable speed pulley system that drives the transaxle.
If the tractor has drive system problems within the warranty period, the servicing Cub Cadet dealer has the fol-
lowing responsibilities:
• Eliminate any external causes for drive system problems before removing the transmission from the trac-
tor.
• External problems would include, but are not limited to: belt, linkage, or brake issues.
• Look for signs of over-use or abuse. Transaxles that fail because of over use or abuse are not warrant-
able. They are to be repaired or replaced at the customer’s expense.
• If the problem is internal, the transmission is to be replaced under the like-kind exchange policy.
• If a transaxle is replaced under warranty, the original transaxle may be called-back for evaluation by MTD
Vendor Recovery Dept.
• Warranty Claims will be denied, returned, or adjusted if the returned transaxle does not meet Cub Cadet’s
replacement criteria.
• Dealers are encouraged to open transaxles for inspection, allowing them to identify a problem within the
transaxle.
• Beyond warranty, dealers are free to repair transmissions at customer expense.
• If the dealer has questions regarding transaxle replacement, they should call Cub Cadet Service using the
dealer only line before proceeding.
About the variable speed drive system.
There are two drive belts in the system. A long drive belt transfers power from the engine crankshaft to the lower
sheave of the variable-speed pulley. A shorter belt fits in the upper sheave of the variable speed pulley; transferring
power from there to the input pulley on the transaxle.
• The drive control pedal tensions the front drive belt.
• The center partition of the variable speed pulley separates the lower (front) belt from the upper (rear) belt.
• As the front belt is tensioned, it is drawn deeper into its sheave. The effective circumference of the driven
pulley shrinks.
• As the front belt is drawn deeper into its sheave, the center partition is forced upward, making the upper
shave narrower.
• As the upper sheave pinches-down on the rear drive belt, the belt is forced outward in the sheave. The
effective circumference of the pulley driving the rear belt grows.
• As the upper and lower sheaves change size, the drive ratio shifts increasing the speed of the rear belt.
• As the sheave that drives the rear belt changes size, the belt must be kept under constant tension. A ten-
sion idler pulley accomplishes this task.
• The clutch/brake pedal automatically de-tensions the front belt when it is applied.
CHAPTER 6: CVT DRIVE AND BRAKE SYSTEM