Husqvarna WHF4817 Lawn Mower User Manual


 
6
FRONT DECK BELT ROUTING:
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 ad-
justment will need to be made.
3. Loosen the nut on the bottom of the idler pul-
ley.
4. Slide the idler pulley against the belt, retighten
the nut while applying pressure to the idler pul-
ley.
INTERLOCK SAFETY SYSTEM
The interlock safety system is to prevent the en-
gine form starting if the blade switch is engaged or
the neutral lock bails is unlocked. It also causes
engine shutdown if the operator falls from, or at-
tempts to leave the operator position while the
blades are engaged or the neutral lock bail is un-
locked. After the engine starts, the operator must
hold either the left or right O.P. lever down before
engaging the blades or unlocking the neutral lock
bail. If neither O.P. lever is held the engine will stop.
Check the function of the safety electrical system
on a regular basis.
FIGURE 2
SETUP AND ADJUSTMENTS
1. Engine must kill if blades are engaged without
at least one O.P. lever held down.
2. Engine must kill if the neutral lock bail is un-
locked from the drive levers without holding
down at least one O.P. lever.
3. Engine must not start unless blades are off
and the neutral lock bail is locked in the drive
levers.
4. Do not operate the mower if the interlock safety
system allows operation or starting in any un-
safe condition.
NEUTRAL LOCK ADJUSTMENT
GROUND SPEED NEUTRAL ADJUSTMENT
Jack up the rear of the unit until the rear wheels
are off of the ground. Secure with jack stands.
Move the ground speed lever to the fast posi-
tion. Start the mower, with the neutral lock bail
locked in the drive levers, check for tire rota-
tion. Using two 9/16” open-end wrenches,
loosen the jam nut on the bottom of the turn-
buckle on the motion control linkage. Turn the
turnbuckle until the tire stops turning. Holding
down the O.P. lever, release the neutral lock bail
from the drive levers. This will cause the tires to
rotate in full forward. Squeeze the drive levers
back and re-lock the neutral lock bail. Verify that
the tire is not turning. Retighten the 9/16” jam
nut. Repeat on other side if necessary.
Jack up the rear of the unit until the rear wheels
are off of the ground. Secure with jack stands.
Verify that the neutral lock bail locked in the drive
levers. (See Neutral Lock Adjustments to ad-
just if necessary). Loosen the jam nut on the
ground speed stop bolt on the front of the con-
sole and back it out a little. Move the ground
speed lever to the rear position. If the tires do
not stop, adjustment of the tracking knob and
tracking bolt may be required. Loosen the jam
nut on the tracking bolt and turn it until the bolt
just contacts the drive left drive lever. Turn the
tracking knob until the threaded portion just con-
tacts the right drive lever. Holding down the O.P.
lever, unlock the neutral lock bail. If the tires ro-
tate, then the tracking