Service Bulletin

Customer Service Bulletin
Commercial Business Group
Greens Aerator Date: October 16, 2002
Model/Serial Range: Model Number:
Serial Numbers:
09120 70001-220009999
Subject: Hole quality concerns.
An incorrectly welded crank arm (Short Crank Assembly 66-4040 or Long Crank
Assembly 66-4030) may affect timing and be responsible for poor hole-quality.
The picture below will help identify a crank assembly that is made wrong. The timing
hole should be in a 90-degree position to the crank pins as shown. An incorrect crank
assembly should be replaced. Contact your local Toro distributor for assistance.
The setup of the machine can also contribute to hole-quality.
Set up items to check (procedures listed in Operator’s Manual):
1. Full engine speed is 3600 rpm.
2. Tire pressure is set to provide a level frame using the “T” shaped Height Gauge.
3. All 4 crank assemblies are timed (synchronized).
4. The coring head depth adjustment bolts are set at 11/16 inch (17.5 mm)
Operating Tip
The Greens Aerator works best when operating in a straight line. Hole-quality can
deteriorate in turns.
Correct position of
timing hole is 90
de
g
rees to crank
p
in.
Incorrect position of
timing hole shown.
90°
Ref: 09-07 Copyright

, 2002. The Toro Company