SERVICE AND ADJUSTMENTS. Husqvarna YT180

SERVICE AND ADJUSTMENTS

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CAUTION: BEFORE PERFORMING ANY SERVICE OR ADJUSTMENTS:

Depress clutch/brake pedal fully and set parking brake.

Place gearshift lever in NEUTRAL (N) position.

Place attachment clutch in "DISENGAGED" position.

Turn ignition key "OFF" and remove key.

Make sure the blades and all moving parts have completely stopped.

Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with plug.

TRACTOR

TO REMOVE MOWER (See Fig. 20)

Mower will be easier to remove from the right side of tractor.

• Place attachment clutch switch in “DISENGAGED” position.

• Move attachment lift lever forward to lower mower to its lowest position.

• Roll belt off electric clutch pulley.

• Disconnect anti-sway bar from chassis bracket by removing retainer spring.

• Disconnect suspension arms from rear deck brackets by removing retainer springs.

• Disconnect front links from deck by removing retainer springs.

• Raise lift lever to raise suspension arms. Slide mower out from under tractor.

IMPORTANT: IF AN ATTACHMENT OTHER THAN THE

MOWER IS TO BE MOUNTED TO THE TRACTOR, THE

R.H. AND L.H. SUSPENSION ARMS MUST BE REMOVED

FROM TRACTOR.

TO INSTALL MOWER (See Fig. 20)

• Raise attachment lift lever to its highest position.

• Slide mower under tractor with discharge guard to right side of tractor.

• Lower lift lever to its lowest position.

• Install mower in reverse order of removal instructions.

SUSPENSION

ARMS

RETAINER

SPRING

ANTI-SWAY BAR

RETAINER

SPRINGS

(BOTH SIDES)

FIG. 20

ELECTRIC

CLUTCH

PULLEY

RETAINER

SPRINGS

(BOTH SIDES)

18

A

SERVICE AND ADJUSTMENTS

TO LEVEL MOWER HOUSING

Adjust the mower while tractor is parked on level ground or driveway. Make sure tires are properly inflated (See

“PRODUCT SPECIFICATIONS” on page 3 of this manual).

If tires are over or underinflated, you will not properly adjust your mower.

SIDE-TO-SIDE ADJUSTMENT (See Figs. 21 and 22)

• Raise mower to its highest position.

• At the midpoint of both sides of mower, measure height from bottom edge of mower to ground. Distance “A” on both sides of mower should be the same or within 1/4" of each other.

• If adjustment is necessary, make adjustment on one side of mower only.

• To raise one side of mower, tighten lift link adjustment nut on that side.

• To lower one side of mower, loosen lift link adjustment nut on that side.

NOTE: Each full turn of adjustment nut will change mower height about 1/8".

• Recheck measurements after adjusting.

BOTTOM EDGE

OF MOWER TO

GROUND

BOTTOM EDGE OF

MOWER TO GROUND

A

FRONT-TO-BACK ADJUSTMENT (See Figs. 23 and 24)

IMPORTANT: DECK MUST BE LEVEL SIDE-TO-SIDE. IF

THE FOLLOWING FRONT-TO-BACK ADJUSTMENT IS

NECESSARY, BE SURE TO ADJUST BOTH FRONT LINKS

EQUALLY SO MOWER WILL STAY LEVEL SIDE-TO-

SIDE.

To obtain the best cutting results, the mower housing should be adjusted so that the front is approximately 1/4" to

3/4" lower than the rear when the mower is in its highest position.

Check adjustment on right side of tractor. Measure distance “D” directly in front and behind the mandrel at bottom edge of mower housing as shown.

• Before making any necessary adjustments, check that both front links are equal in length. Both links should be approximately 10-3/8".

• If links are not equal in length, adjust one link to same length as other link.

• To lower front of mower loosen nut “E” on both front links an equal number of turns.

• When distance “D” is 1/4" to 3/4" lower at front than rear, tighten nuts “F” against trunnion on both front links.

• To raise front of mower, loosen nut “F” from trunnion on both front links. Tighten nut “E” on both front links an equal number of turns.

• When distance “D” is 1/4" to 3/4" lower at front than rear, tighten nut “F” against trunnion on both front links.

• Recheck side-to-side adjustment.

MANDREL

GROUND LINE

FIG. 21

SUSPENSION

ARM

“D” “D”

FIG. 23

BOTH FRONT LINKS MUST BE EQUAL IN LENGTH

FIG. 22

LIFT LINK

ADJUSTMENT NUT

NUT “E”

NUT “F”

19

FRONT LINKS TRUNNION

FIG. 24

SERVICE AND ADJUSTMENTS

TO REPLACE MOWER BLADE DRIVE BELT

(See Fig. 25)

The mower blade drive belt may be replaced without tools.

Park the tractor on level surface. Engage parking brake.

BELT REMOVAL -

• Remove mower from tractor (See “TO REMOVE

MOWER” in this section of this manual).

• Work belt off both mandrel pulleys and idler pulleys.

• Pull belt away from mower.

BELT INSTALLATION -

• Install new belt in reverse order of removal.

• Make sure belt is in all pulley grooves and inside all belt guides.

• Install mower in reverse order of removal instructions.

MANDREL

PULLEY

IDLER PULLEY

WITH PARKING BRAKE "ENGAGED"

1-1/2"

NUT “A”

JAM NUT

OPERATING ARM

MANDREL PULLEY

FIG. 25

TO ADJUST BRAKE (See Fig. 26)

Your tractor is equipped with an adjustable brake system which is mounted on the right side of the transaxle.

If tractor requires more than six (6) feet stopping distance at high speed in highest gear, then brake must be adjusted.

• Depress clutch/brake pedal and engage parking brake.

• Measure distance between brake operating arm and nut "A" on brake rod.

• If distance is other than 1-1/2" loosen jam nut and turn nut "A" until distance becomes 1-1/2". Retighten jam nut against nut "A".

• Road test tractor for proper stopping distance as stated above. Readjust if necessary. If stopping distance is still greater than six (6) feet in highest gear, further maintenance is necessary. Contact your nearest authorized service center.

FIG. 26

TO REPLACE MOTION DRIVE BELT

(See Fig. 27)

Park the tractor on level surface. Engage parking brake.

For assistance, there is a belt installation guide decal on bottom side of left footrest.

• Remove mower (See “TO REMOVE MOWER” in this section of this manual.)

• Disconnect clutch wire harness.

• Remove clutch locator.

• Remove upper belt keeper.

• Remove belt from stationary idler and clutching idler.

• Pull belt slack toward rear of tractor. Remove belt upwards from transaxle pulley by deflecting belt keepers.

• Pull belt toward front of tractor and remove downwards from around electric clutch.

• Install new belt by reversing above procedure.

IMPORTANT: MAKE SURE UPPER BELT KEEPER IS

POSITIONED PROPERLY BETWEEN LOCATOR TABS

A N D E L E C T R I C C L U T C H W I R E C O N N E C T I O N I S

SECURE.

ELECTRIC

CLUTCH

CLUTCH LOCATOR

CLUTCHING

IDLER

LOCATOR TABS

UPPER BELT

KEEPER

STATIONARY

IDLER

TRANSAXLE

PULLEY

CLUTCH

WIRE

HARNESS

FIG. 27

20

SERVICE AND ADJUSTMENTS

TO ADJUST STEERING WHEEL ALIGNMENT

If steering wheel crossbars are not horizontal (left to right) when wheels are positioned straight forward, remove steering wheel and reassemble per instructions in the Assembly section of this manual.

FRONT WHEEL TOE-IN/CAMBER

The front wheel toe-in and camber are not adjustable on your tractor. If damage has occurred to affect the front wheel toe-in or camber, contact your nearest authorized service center/department.

TO REMOVE WHEEL FOR REPAIRS

(See Fig. 28)

• Block up axle securely.

• Remove wheel cover, retaining ring and washers to allow wheel removal (rear wheel contains a square key

- Do not lose).

• Repair tire and reassemble.

• On rear wheels only: align grooves in rear wheel hub and axle. Insert square key.

• Replace washers and snap retaining ring securely in axle groove.

• Replace wheel cover.

TO START ENGINE WITH A WEAK BATTERY

(See Fig. 29)

CAUTION: Lead-acid batteries generate explosive gases. Keep sparks, flame and smoking materials away from batteries. Always wear eye protection when around batteries.

If your battery is too weak to start the engine, it should be recharged. If "jumper cables" are used for emergency starting, follow this procedure:

IMPORTANT: YOUR TRACTOR IS EQUIPPED WITH A

12 VOLT NEGATIVE GROUNDED SYSTEM. THE OTHER

V E H I C L E M U S T A L S O B E A 1 2 V O L T N E G A T I V E

GROUNDED SYSTEM. DO NOT USE YOUR TRACTOR

BATTERY TO START OTHER VEHICLES.

TO ATTACH JUMPER CABLES -

• Connect each end of the RED cable to the POSITIVE

(+) terminal of each battery, taking care not to short against chassis.

• Connect one end of the BLACK cable to the NEGA-

TIVE (-) terminal of fully charged battery.

• Connect the other end of the BLACK cable to a good

CHASSIS GROUND, away from fuel tank and battery.

TO REMOVE CABLES, REVERSE ORDER -

• BLACK cable first from chassis and then from the fully charged battery.

• RED cable last from both batteries.

WASHERS

RETAINING

RING

POSITIVE TERMINAL NEGATIVE TERMINAL

WHEEL COVER

SQUARE KEY

(REAR WHEEL ONLY)

FIG. 28

21

CHASSIS

CABLES

CHARGED

BATTERY

POSITIVE TERMINAL

FIG. 29

NEGATIVE TERMINAL

SERVICE AND ADJUSTMENTS

TO REPLACE FUSE

Replace with 30 amp automotive-type plug-in fuse. The fuse holder is located in the engine compartment, directly in front of the dash.

TO REPLACE HEADLIGHT BULB

• Raise hood.

• Pull bulb holder out of the hole in the backside of the grill.

• Replace bulb in holder and push bulb holder securely back into the hole in the backside of the grill.

• Close hood.

INTERLOCKS AND RELAYS

Loose or damaged wiring may cause your tractor to run poorly, stop running or prevent it from starting.

• Check wiring. See the electrical wiring diagram in the

Repair Parts section of this manual.

TO REMOVE HOOD AND GRILL ASSEMBLY

(See Fig. 30)

• Lift hood. Disconnect headlight wire connection.

• Remove wing nuts on inside of side panels.

• Pivot hood and side panel forward and lift off tractor.

• To replace, reverse above procedure.

WINGNUT (INSIDE)

WIRE CONNECTION

FIG. 30

22

SERVICE AND ADJUSTMENTS

ENGINE

TO ADJUST THROTTLE CONTROL CABLE

(See Fig. 31& 32)

The throttle control has been preset at the factory and adjustment should not be necessary. Check adjustment as described below before loosening cable. If adjustment is necessary, proceed as follows:

• With engine not running, move throttle control lever to fast ( ) position.

• Check that speed control lever is against stop screw. If it is not, loosen casing clamp screw and pull throttle cable until lever is against screw. Tighten clamp screw securely.

TO ADJUST CARBURETOR (See Fig. 33)

The carburetor has been present at the factory and adjustment should not be necessary. However, minor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. If the carburetor does not need adjustment, proceed as follows:

In general, turning the adjusting needles in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/air mixture. Turning the adjusting needles out (counterclockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

IMPORTANT: DAMAGE TO THE NEEDLES AND THE

SEATS IN CARBURETOR MAY RESULT IF SCREW IS

TURNED IN TOO TIGHT.

PRELIMINARY SETTING -

• Be sure you have a clean air filter, and the throttle control cable is adjusted properly (see above).

• With engine off turn idle fuel adjusting needle in (clockwise) closing it finger tight and then turn out (counterclockwise) 1-1/4 turns.

• Turn main fuel adjusting needle in (clockwise) closing finger tight and then turn out (counterclockwise) 1 turn.

FINAL SETTING -

• Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control lever in neutral (N) position.

• With throttle control lever in fast ( ) position, turn main fuel adjusting needle in (clockwise) until engine begins to die then turn out (counterclockwise) until engine runs rough. Turn needle to a point midway between those two positions.

• Idle speed setting - With throttle control lever in slow

( ) position, engine should idle at 1400 RPM. If engine idles too slow or fast, turn idle speed adjusting screw in or out until correct idle is attained.

• Idle fuel needle setting - With throttle control lever in slow ( ) position, turn idle fuel adjusting needle in

(clockwise) until engine begins to die and then turn out

(counterclockwise) until engine runs rough. Turn needle to a point midway between those two positions.

• Recheck idle speed. Readjust if necessary.

ACCELERATION TEST -

• Move throttle control lever from slow ( ) to fast ( ) position. If engine hesitates or dies, turn idle mixture screw out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine accelerates smoothly.

High speed stop is factory adjusted. Do not adjust-damage may result.

IMPORTANT: NEVER TAMPER WITH THE ENGINE

GOVERNOR, WHICH IS FACTORY SET FOR PROPER

ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE

T H E F A C T O R Y H I G H S P E E D S E T T I N G C A N B E

DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

N E A R E S T A U T H O R I Z E D S E R V I C E C E N T E R /

DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND

E X P E R I E N C E T O M A K E A N Y N E C E S S A R Y

ADJUSTMENTS.

STOP SCREW CASING

CLAMP

SCREW

SPEED

CONTROL

LEVER

THROTTLE

CABLE

STOP SCREW

IDLE SPEED

ADJUSTING

SCREW

FIG. 31

FIG. 32

FIG. 33

SPEED

CONTROL

LEVER

IDLE FUEL

ADJUSTING

NEEDLE

MAIN FUEL

ADJUSTING

NEEDLE

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