9
10. To "freewheel" or move the machine around
without the engine running, turn the dump valve
levers located at the back of the pumps to the
"freewheel" positions (see Figure 1). To operate
the machine, the dump valve levers must be
returned to the closed positions.
Dump Valve Levers
(normal position)
SGB112
Figure 1. Dump Valves
-NOTE-
The hydro drive belt is spring loaded and does
not require adjustment.
1. Remove the belt cover.
2. Adjust the cutter deck drive belt using a belt tension
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt nut. (See Figure 2)
SC400G
BELT
WASHER
"J" BOLT
NUT
CUTTER DECK DRIVE BELT TENSION
ALIGNMENT IDLER - L.H.
END OF L-SHAPED
BRACKET
Figure 2. Deck Drive Belt Adjustment
-NOTE-
Due to initial belt stretch and to prevent the belt
from slipping, check this adjustment after the
first 2 hours, 4 hours and 8 hours of operation.
3. Adjust the RH blade drive belt using a belt tension
gauge. Adjust the belt so that the belt moves 1/2"
with 10 pounds of pressure. Adjust the tension by
tightening or loosening the J-bolt nut. (See Figure 3)
4. Replace the belt cover.
"J" Bolt
Nut
Belt
Deck
Washer
Figure 3. Cutter Deck Belt Adjustment R.H.
CUTTER DECK ADJUSTMENTS
Due to the many cutting conditions that exist, it is difficult
to suggest a cutter deck setting that will work for every
lawn. There are two adjustments that can be made on
these decks, pitch and height.
PITCH is the angle of the blades (comparing front to
rear). A 1/4" downward pitch (front of deck down) is
recommended for best cutting performance.
HEIGHT is the nominal distance the blade is off of the
ground. This measurement is made with the blades
pointed side to side and distance is measured between
cutting tip and ground. (Also see Blade Height Adjust-
ment)
Changes to the cutting height can be achieved by reposi-
tioning the cutter deck. (This adjustment will also effect
the pitch of the deck). There are three available posi-
tions (see Figure 4).
CUTTER DECK BELT ADJUSTMENTS