National Mower HYDRO HYD70OM-8/99 - Manual (Page 12)

HY70OM-8/99
12
5.8—CHOKE
When starting a cold engine, pull the choke
control out to close the choke plate and allow a richer
fuel mixture to enter the engine. After the engine starts,
push the choke control about half way in to keep the
partially closed. Push the choke control all the way in to
open the choke plate for normal operation after the
choke plate engine is properly warmed. A warm engine
usually requires less choke to start.
5.9—THROTTLE LEVER
Push forward to increase engine speed, pull
back to decrease.
5.10—TRACTION PEDAL
The traction pedal operates the forward and reverse
direction and speed of the machine. By pushing the toe
of the pedal down, the forward speed is increased. By
pushing the heel of the pedal down the reverse speed is
increased. When the traction pedal is released the
machine will slow down and stop.
5.11—MOW AND LIFT TREADLE
Depress and hold the down pedal with left foot to
lower mowers. Reels will rotate if reel control lever is in
“ENGAGED” position. Depress and hold the up pedal to
raise mowers. Reels will stop if control lever is in
“ENGAGED” position when mowers are raised.
When operating the mow or lift pedal,
keep the pedal depressed until the
mowers have been completely lowered
or raised, and then release the pedal.
5.12—FREE-WHEELING VALVE
To permit moving the Hydro 70 without starting
the engine, a freewheeling device or tow valve has been
provided.
The valve is located under the left shield on the
front side of the vehicle. With the engine “OFF”, turn
knob to open valve and permit free-wheeling. Free-
wheeling valve must be closed during normal operation
or tractive effort will be severely reduced.
5.13—DROP/LIFT NEEDLE VALVE
A needle valve is located under the left shield on
the front side of the vehicle. By turning the needle valve
knob, the speed of drop and raising of the cutting units
can be adjusted as desired.
Familiarize yourself with the instrument
panel and the controls. Study the
instructions and learn to use the controls
correctly. Keep hands and feet away from
controls unless you intend to use them.
3.13 INTERLOCK SWITCHES
There are four interlock switches on your Hydro
70. They are a safety precaution which will allow you to
start your mower only when the traction pedal is in
neutral, the reel control lever is in the disengaged
position and operator is seated on the tractor. If you
are able to start your mower with these levers in any
other position, adjustment of the switches is required.
1. The neutral start switches are located under the
traction control pedal.
2. The reel control lever switch is located on the side of
the console and is activated by the reel lever.
3. The seat switch is located under the seat and is
activated by the weight of the operator.
NOTE