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TROUBLE SHOOTING
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1. Blade timing is set at the factory and (with
normal use) cannot go out of time. The
obvious symptom of improper blade timing
is the sound of the blades hitting together.
2. Causes of improper blade timing:
A. The blades were not timed properly
when a new belt was installed.
B. A blade hit something hard enough to
shear its woodruff key allowing the
cradle to turn on the shaft, fig 1, Item
35. The key keeps the blade cradle from
turning on the shaft.
C. The same impact condition as "B" ex-
cept that the key did not shear but the
drive collar has turned (slipped) on the
shaft, fig 1, Item 42. This condition is
rare as the key should shear (to protect
the driveline) before the collar will slip.
3. Corrections for Items A, 'B and C:
A. Retime the blades; see ADJUSTMENTS.
B. Remove the blade and cradle and install
a new woodruff key. Check blade timing;
see ADJUSTMENTS.
C. Replace the drive collar with a new one;
check the drive shaft and gear box shaft
for damage. Retime the blades; see
ADJUSTMENTS.
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ROUTINE MAINTENANCE
1. Keep the mower blades sharp and balanced.
2. Keep the mower clear of cuttings and debris.
3. Periodically inspect the drive housings for
leakage of lubricant, fig 1, Items 36 and 44.
If the drive housings show signs of leakage,
contact the Gravely Dealer. Do not open the
drive housing as this voids warranty.
STORAG E
1. Clean the mower of all cuttings and debris.
2. Perform all routine maintenance.
3. Apply a light coat of oil to preserve the finish
and appearance.
FORM NUMBER: 20812L2
EFFECTIVE DATE: 6-15-74
PRINTED IN USA