RBH Sound RBH 180 - Manual (Page 20)

18
– English
ADJUSTMENTS
SERVICING
In the event of system failure, there is a manual position
"MAN" switch option which allows for a temporary
over-ride of the overload warning system. It is recom-
mended that this be only used as a back-up & only until
necessary repairs can be arranged. A temporary by-pass
service connector has been included in the original
tractor kit & should be installed while the system is
being serviced. This service connector will provide a
shunt path & will shut-off hte cutting system immedi-
ately upon receiving a signal from the collector overload
switch indicating a full grass collector condition.
IMPORTANT
As soon as the blades strike any solid object the shear
bolts will break. Immediately stop the engine! Check
the blades! Replace the broken shear bolts only with
factory originals. For installation refer to fig. 30.
Check to make sure that all blade mounting bolts are
tightened.
To remove blades:
1. Remove the mower deck.
2. When replacing the blades, be sure all parts are
reassembled in proper order and securely
tightened, or severe vibrations will occur (See
fig. 30). Bent tip edges of blades must be toward
top of the mower deck, or blades will not cut.
IMPORTANT
The right blade has a left hand thread bolt.
! !
DANGER
Do not handle the blades with bare hands. Wear
gloves or wrap the blades with newspaper or other
material while removing or installing the blades.
3. Reinstall the mower deck.
! !
Fig. 30
SHEAR PINS (FIG. 30)
BLADE SHARPENING
Great care should be taken to keep the blades
balanced. An unbalanced blade will cause excessive
vibrations and eventual damage to the engine or the
mower.
IMPORTANT
1. The blade can be sharpened with a file or on a
grinding wheel. Do not attempt to sharpen while
on mower.
2. Place the center hole of the blade over the end
of a screwdriver, placed horizontally. If the blade
is balanced, it should remain in a horizontal
position. If either end of the blade moves
downward, sharpen the heavy end until the
blade is balanced.
DRIVE BELTS ADJUSTMENT
(FIG. 31, 32 AND 33)
The life time of the belts and their proper operation
depends on their right adjustment. After a few hours
of operation, they must be inspected and may need
adjustment.
IMPORTANT
The three belts are located beneath the main frame. One
belt drives the transaxle. The other one transmits the
power from the clutch to the mower deck. The third one
drives and synchronizes the two blades together.