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.

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.

5.9—THROTTLE LEVER

Push forward to increase engine speed, pull back to decrease.

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.

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.

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.

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.

NOTE

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.

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.

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National Mower HYD70OM-8/99 Choke, Throttle Lever, DROP/LIFT Needle Valve, Traction Pedal, MOW and Lift Treadle