Series 1000 and 1500
39
23.13.The double idler pivot bracket is held to the
frame by the same bolt that holds the fore-most
of the two pulleys. The rear pulley can be easily
removed from the bracket. It is necessary to take
the fenders off to remove the front pulley or the
bracket itself.
23.14.Install the drive belt by reversing the order of the
removal process.
• Apply anti-seize compound to the crankshaft
before installing the PTO clutch.
• Tighten the crankshaft bolt to a torque of 38-50
ft.-lbs. on assembly.
• Test the drive system and all tractor safety fea-
tures in a clear area that is free of hazards and
by standers before returning the tractor to ser-
vice.
24. DRIVE SYSTEM ADJUSTMENT:
HYDROSTATIC LT
24.1. The relief valve is operated using a small rod
that is visible at the bottom right corner of the
rear of the tractor frame.
See Figure 24.1.
24.2. Pulling the rod out and locking it in the upper
portion of the keyhole enables the tractor to be
pushed, but disables the hydraulics of the drive
system by opening a valve that releases the
hydraulic pressure from the motor circuit.
Figure 24.1
Relief valve rod
24.3. There is no adjustment to the relief valve, but full
travel of the linkage should be checked if the
drive system is losing power or ground speed.
See Figure 24.3.
24.4. Symptoms of a linkage that is out of adjustment
include:
• Low ground speed in either direction with no
unusual noises from the transaxle. One possible
cause for low ground speed is a linkage that
does not transfer all of the pedal travel to the
input arm on the transaxle.
• “Creeping” when the transaxle is in neutral
position.
• Whining or growling when the tractor is in Neu-
tral with the brake applied.
• The creeping and whining symptoms usually
accompany one-another, indicating that the link-
age is not properly centered around Neutral.
• Low ground speed in one direction only (For-
ward or Reverse) may accompany whining,
growling or creeping in Neutral if the linkage is
out of adjustment.
• Low ground speed, accompanied by excessive
noise is likely to be an internal problem or a
brake that is dragging or out of adjustment.
24.5. Begin linkage adjustment by inspecting the link-
age. Linkages on equipment that has been in the
field are usually out of adjustment because the
linkage is binding, worn, bent, or tampered with.
24.6. Replace any worn or damaged parts before
adjusting the linkage.
Figure 24.3
Relief valve linkage
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