Walker MDD (20.9 HP) - Manual (Page 85)

Maintenance Instructions
ADJUSTMENTS
81
Straight Ground Travel Adjustment
Forward Speed Control Friction Lock
The FSC friction lock is adjusted to hold the select-
ed forward speed when the steering levers are
moved and yet the friction is not too heavy to make
moving the control difficult (too much friction).
The procedure for checking and adjusting the FSC
friction lock is as follows:
Forward Speed Control Friction Lock
1. Place the FSC in the full FORWARD position
and pull both steering levers back; the FSC le-
ver should not move. If the FSC lever moves
back when the steering levers are pulled back,
the friction needs to be increased.
2. With the steering levers held back, move the
FSC lever back from the FORWARD position.
With a proper amount of friction adjusted, the
FSC lever should move back with a slight
amount of resistance (friction). If the FSC lever
movement is “stiff”, the friction needs to be de-
creased.
3. The FSC friction is increased or decreased by
tightening or loosening the friction adjust-
ment nut. Loosen or tighten the nut and check
the control function until conditions of both
steps 1 and 2 (above) are met.
Tilt-Up Deck Adjustable Stop
When the carrier frame hinge joint is properly adjust-
ed, the deck lock levers should move in and out of
the engaged and disengaged positions freely. All
four hitch pins used for height adjustment should sit
flush on the washers above the deck pin bushing.
On a level surface, if any pin is sticking up (likely the
front pins), tighten the opposite side or loosen the
existing side to lower the pin. Adjustments are made
by loosening the jam nut and tightening or loosening
the set screws on the Deck Mount Pivot Brackets.
Retighten the jam nut when the adjustment is com-
plete.
Tilt-Up Deck Adjustable Stop
Fuel Valve Solenoid Linkage
To prevent damage to the fuel valve solenoid, the
linkage to the engine must be adjusted so the sole-
noid bottoms out before the control arm on the en-
gine contacts its stop (when the engine is running).
A solenoid that does not bottom out when the engine
is running will become overloaded and burn out.
End Wrench on
Adjustment Nut
Friction Washer
Friction
Adjustment Nut
FSC Actuator
Set Screw
Jam Nut