Interlock Safety System - Husqvarna WHF4215ETS Operator's Manual

Walk-behind hydro commercial mowers
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ADJUSTMENTS
FRONT DECK BELT ROUTING:
FIGURE 3
PUMP BELT
1. Before performing adjustments on pump belt, turn the mower off and disconnect spark plug
wire or wires.
2. Check tension on the belt. If it feels loose adjustment will need to be made.
3. Loosen the nut on the bottom of the idler pulley.
4. Slide the idler pulley against the belt, retighten the nut while applying pressure to the idler
pulley. (see fig. 6)

INTERLOCK SAFETY SYSTEM

The interlock modules function is to prevent the engine form starting if the blade and/or ground
speed lever are engaged. It also causes engine shutdown if the operator falls from, or attempts
to leave the operator position while the blades or ground speed lever are engaged. After the
engine starts, the operator must hold either the left or right O.P. lever down before engaging the
blades or moving the ground speed lever. If neither O.P. lever is held the engine will stop. Check
the function of the safety electrical system on a regular basis.
1. Engine must kill if blades are engaged without at least one O.P. lever held down.
2. Engine must kill if ground speed lever is taken out of neutral without holding down at least one
O.P. lever.
3. Engine must not start unless blades are off and ground speed lever is in the neutral position.
4. Do not operate the mower if the interlock safety system allows operation or starting in any
unsafe condition.
7

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