Cub Cadet SLTX1000 Series - Manual (Page 62)

LTX Tractors
56
Externally repairable drive system problems
Most of the problems listed in this section will result in a customer complaint of low power or low ground speed,
sometimes accompanied by growling or similar noises from the transaxle. If the tractor is difficult to push, check the
brakes and the hydraulic bypass.
1. Engine performance:
1a. Find the specified engine RPM for the tractor (
3,375-3,525 RPM for the Cub Cadet Series
1000).
1b. Check the engine with a tachometer to con-
firm that it maintains the specified RPM under
normal load. See Figure 5.1.
1c. Correct engine performance problems before
trying to diagnose drive system problems.
2. Check the tires: Confirm that the correct size tires
are on the tractor.
Smaller rear tires will yield lower ground speed.
Under-filled tires will put additional load on the drive
system.
• LTX 1040 Series has 20” x 8” rear tires.
• LTX 1050 Series has 20” x 10” rear tires.
• SLTX 1050 Series has 22” x 9.5” rear tires.
3. Check the hydro. bypass linkage: See Figure 5.2.
3a. If the tractor does not drive with as much
speed or power as normal:
• Confirm that the transmission release rod is
fully engaged (pushed-in).
• When the transmission release rod is fully
engaged, confirm that the bypass arm on the
side of the transaxle moves freely.
• If the bypass arm is not releasing fully, the vari-
able displacement pump will cavitate, or pump
air. The air bubbles will produce a growling
noise as they go through the system.
3b. If the tractor is difficult to push:
• Confirm that the Transmission Release Rod is
disengaged (pulled-out and hooked).
• Confirm that the Transmission Release Rod and spring are moving the bypass arm correctly. It takes
about 5 lbs. (2.3 Kg.) force to move the bypass arm fully into the release position.
• If the bypass linkage is working correctly, confirm that the brakes are releasing fully.
Figure 5.1
Figure 5.2
bypass linkage