ryan LAWNAIRE 28 544887 User manual

OP / PARTS MANUAL
MAN 4163566 Rev. A 2-2009
MODEL:
544874F
LAWNAIRE 28 - 6.5 HP B&S
544887
LAWNAIRE 28 - 5.5 HP HONDA

CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of
its constituents are known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Californie Proposition 65
Avertissement
Les échappements des moteurs diesel
et certains de leurs composés sont
reconnus par l’Etat de Californie pour
être cancérigènes, provoquer des
défauts congénitaux et d’autres dangers
en matière de reproduction.
ADVERTENCIA
AVERTISSEMENT
WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
California Advertencia
de la Proposicion 65
El estado de California hace saber que
los gases de escape de los motores
diesel y algunos de sus componentes
producen cáncer, defectos de
nacimiento y otros daños en el
proceso de reproducción humana.
L’
é mission du moteur de ce mat é riel
contient des produits chimiques que
l’Etat de Californie consid
è re ê tre
canc é rig è nes, provoquer des d é fauts
cong é nitaux et d’autres dangers en
mati è re de reproduction.
El estado de California hace saber
que los gases de escape de este
producto contienen productos
quÍmicos que producen cáncer,
defectos de nacimiento y otros daños
en el proceso de reproducción
humana.
CALIFORNIA
Proposition 65 Warning
Battery posts, terminals, wiring
insulation, and related accessories
contain lead and lead compounds,
chemicals known to the State of
California to cause cancer and birth
defects or other reproductive harm.
WASH HANDS AFTER HANDLING.

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02-2009
IMPORTANT MESSAGE
Thank you for purchasing this Schiller Grounds Care, Inc. product. You have purchased a world class product,
one of the best designed and built anywhere.
This machine comes with a Technical Manual containing safety, operation, parts, maintenance and service
information. The useful life and good service you receive from this machine depends to a large extent on how
well you read and understand this manual. Treat your machine properly, lubricate and adjust it as instructed,
and it will give you many years of reliable service.
Your safe use of this Schiller Grounds Care, Inc. product is one of our prime design objectives. Many safety
features are built in, but we also rely on your good sense and care to achieve accident-free operation. For best
protection, study the manual thoroughly. Learn the proper operation of all controls. Observe all safety precau-
tions. Follow all instructions and warnings completely. Do not remove or defeat any safety features. Make sure
those who operate this machine are as well informed and careful in its use as you are.
See a Schiller Grounds Care, Inc. dealer for any service or parts needed. Schiller Grounds Care, Inc. service
ensures that you continue to receive the best results possible from Schiller Grounds Care, Inc. products. You
can trust Schiller Grounds Care, Inc. replacement parts because they are manufactured with the same high
precision and quality as the original parts.
Schiller Grounds Care, Inc. designs and builds its equipment to serve many years in a safe and productive man-
ner. For longest life, use this machine only as directed in the manual, keep it in good repair and follow safety
warnings and instructions. You'll always be glad you did.
Schiller Grounds Care, Inc.
One Bob Cat Lane
Johnson Creek, WI 53038-0469
TABLE OF CONTENTS........................................ FIGURES ................................................................... PAGE
SAFETY........................................................................................................................................................2- 6
LABELS........................................................................................................................................................7, 8
SET-UP........................................................................................................................................................ 9-11
CONTROLS..............................................................................................................................................12, 13
OPERATION.............................................................................................................................................14, 15
SERVICE..................................................................................................................................................16- 22
SERVICE/SPECIFICATIONS .........................................................................................................................23
PARTS SECTION........................................................................................................................................... 25
ENGINE MOUNTING .......................................... FIGURE 1 ...................................................................26, 27
AERATOR HEAD ................................................ FIGURE 2 ................................................................... 28, 29
FRAME, WHEELS & TIRES................................ FIGURE 3 ................................................................... 30, 31
HANDLEBAR & SHROUD................................... FIGURE 4 ................................................................... 32, 33
AERATOR DRIVE ............................................... FIGURE 5 ................................................................... 34, 35
TRANSPORT DRIVE .......................................... FIGURE 6 ................................................................... 36, 37
TRANSMISSION ................................................. FIGURE 7 ................................................................... 38, 39
REVERSING GEAR BOX.................................... FIGURE 8 ................................................................... 40, 41
DIFFERENTIAL................................................... FIGURE 9 ................................................................... 42, 43

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MODEL NUMBER: This number appears on
sales literature, technical manuals and price lists.
SERIAL NUMBER: This number appears only
on your mower. It contains the model number
followed consecutively by the serial number.
Use this number when ordering parts or seeking
warranty information.
SAFETY
NOTICE !!!
Unauthorized modifications may present extreme
safety hazards to operators and bystanders and
could also result in product damage.
Schiller Grounds Care, Inc. strongly warns against,
rejects and disclaims any modifications, add-on
accessories or product alterations that are not
designed, developed, tested and approved by Schiller
Grounds Care, Inc. Engineering Department. Any
Schiller Grounds Care, Inc. product that is altered,
modified or changed in any manner not specifically
authorized after original manufacture–including the
addition of “after-market” accessories or component
parts not specifically approved by Schiller Grounds
Care, Inc.–will result in the Schiller Grounds Care,
Inc. Warranty being voided.
Any and all liability for personal injury and/or
property damage caused by any unauthorized
modifications, add-on accessories or products not
approved by Schiller Grounds Care, Inc. will be
considered the responsibility of the individual(s) or
company designing and/or making such changes.
Schiller Grounds Care, Inc. will vigorously pursue
full indemnification and costs from any party
responsible for such unauthorized post-manufacture
modifications and/or accessories should personal
injury and/or property damage result.
This symbol means:
ATTENTION!
BECOME ALERT!
Your safety and the safety of others is involved.
Signal word definitions:
The signal words below are used to identify levels
of hazard seriousness. These words appear in this
manual and on the safety labels attached to Schiller
Grounds Care, Inc. machines. For your safety and
the safety of others, read and follow the information
given with these signal words and/or the symbol
shown above.
DANGER indicates an imminently hazardous
situation which, if not avoided, WILL result in death
or serious injury.
WARNING indicates a potentially hazardous
situation which, if not avoided, COULD result in
death or serious injury.
CAUTION indicates a potentially hazardous situation
which, if not avoided, MAYresult in minor or moderate
injury. It may also be used to alert against unsafe
practices or property damage.
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, MAY result in property damage.

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PREPARING FOR SAFE OPERATION
Operator preparation and training
Read the Operation & Safety
Manual
- If an operator or mechanic
cannot read English, it is
the owner's responsibility
to explain this material
to them. If any portion
of this material is unclear, contact your factory
representative for clarification.
- Become familiar with the safe operation of the
equipment, operator controls and safety signs.
Know how to stop the engine and attachments
quickly in an emergency. Do not operate or allow
another person to operate this machine if there
are any questions about safety.
- All operators and mechanics should be trained.
The owner is responsible for training the users.
- Wear appropriate clothing, including long
trousers and safety goggles or safety glasses
with side shields when operating mower. Do not
operate barefoot or wearing open sandals. Long
hair, loose clothing or jewelry may get tangled in
moving parts.
- Wear hearing protection.
- Never allow underage children, unskilled
or improperly trained people operate this
equipment. Local regulations can restrict the age
of the operator.
- Keep warning labels and this operator's manual
legible and intact. Replacement labels and
manuals are available from the factory.
- Do not operate machine while under the
influence of drugs or alcohol.
- The owner/user can prevent and is responsible
for accidents or injuries occurring to themselves,
other people or property.
Site preparation and circumstances
- Evaluate the terrain to determine what
accessories and attachments are needed to
properly and safely perform the job. Only use
accessories and attachments approved by the
manufacturer.
- Clear the area to be aerated of objects such
as rocks, toys, wire or other debris that may be
struck or thrown by the aerator.
- Be sure the area is clear of pets and people,
especially young children. Never assume they
will remain where you last saw them. Stop the
machine if any enter the area.
- Aerate only in daylight or in good artificial light.
- Do not aerate wet grass as tires may lose
traction.
SAFETY
PREPARING FOR SAFE OPERATION
Machine preparation
- Check operator presence interlock system and
brake operation. Adjust or repair any problems
before using.
- Do not tamper with or defeat safety devices.
Keep guards, shields and interlock safety devices
in place and in proper working condition. They
are for your protection.
- Keep all fasteners such as nuts, bolts and pins
well secured.
- Visually inspect tires, tine bolts and the aerator
mechanism for wear or damage. Replace worn
or damaged parts.
- Verify that machine and attachments, if any, are
in good operating condition.
- Do not engage traction drive or tines until ready
to aerate.

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OPERATING SAFELY
In general
- Use extra care when loading or unloading the
machine into a trailer or truck.
- Slow down and use caution when making turns
and crossing roads and sidewalks. Stop tines if
not aerating.
- Do not run the engine in an enclosed area where
dangerous carbon monoxide fumes can collect.
- Never leave a machine unattended. Always
disengage times, traction drive ans stop engine
before leaving machine.
Starting
- Start only according to instructions in this manual
or on the machine.
- Before attempting to start the engine, make sure
the traction drive and tines are disengaged.
- When starting the engine, make sure hands and
feet are clear of the tines.
- Do not change engine governor settings or
overspeed the engine. Operating the engine
at excessive speed can increase the hazard of
personal injury.
Interrupting operation
- Before leaving the operator's position:
- Park on level ground.
- Disengage the traction drive and tines.
- Shut off the engine.
- Disengage the tines and wait until they quit
moving:
- when not aerating;
- for transport;
- when crossing surfaces other than grass.
- Stop the engine, disengage the tines and traction
drive and wait until the tines stop moving before
refueling.
- Stop the engine, disengage the traction drive and
tines and disconnect the spark plug wire(s) or
remove the key:
- before checking, cleaning or working on the
machine;
- after striking a foreign object. Inspect the
machine for damage and make repairs before
restarting;
- if the machine begins to vibrate abnormally:
shut off machine immediately. Inspect and
make repairs as needed before restarting;
- except for repairs or adjustments as specifically
noted, such as for carburetor adjustment,
where the engine must be running. Keep
hands and feet clear of moving parts in these
circumstances.
- Allow the tines to come to a complete stop when
stopping operation to inspect the machine, do
maintenance or repair.
- Reduce the throttle setting during engine shut-
down and, if the engine is provided with a shut-
off valve, turn the fuel off at the conclusion of
aerating.
OPERATING SAFELY
MANEUVERING SAFELY
In general
- Slow down before turning.
- Be aware when approaching blind corners,
shrubs, trees, tall grass or other objects that may
obscure vision.
Slopes
Slopes are a major factor in loss-
of-control and tipover accidents
that sometimes lead to severe
injury or death. All slopes require
extra caution.
- Do not aerate on slopes if
uneasy or uncertain. Ultimate responsibility for
safe operation on slopes rests with the operator.
- Do not aerate excessively steep slopes.
- Aerate across slopes, not up and down.
- Avoid starting or stopping on a slope. If tires lose
traction, disengage the tines and proceed slowly
straight down the slope.
- Keep all movement on the slopes slow and
gradual. Do not make sudden changes in speed
or direction.
- Do not turn on slopes unless necessary, and then
turn slowly and downhill when possible.
- Stay away from slopes if the ground is loose or if
caught in the rain during mowing.
- Use lower speeds on a slope to avoid stopping or
shifting.
WARNING
MANEUVERING SAFELY
SAFETY

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- Remove obstacles such as rocks, treelimbs etc.
- Avoid driving over obstacles such as ruts, holes,
rocks and roots whenever possible. Be alert to
dips and rises. Uneven terrain can overturn a
mower or cause it to slide. Tall grasses can hide
obstacles.
- Do not aerate dropoffs, ditches or embankments.
The machine could suddenly turn over if a wheel
runs over the edge or an edge caves in.
- Do not aerate slopes when grass is wet.
Reduced traction could cause sliding.
MAINTENANCE SAFETY
MAINTENANCE SAFETY
In general
- Maintain machine according to manufacturer's
schedule and instructions for maximum safety
and best mowing results.
- Park machine on level ground.
- Never allow untrained personnel to service ma-
chine.
- Adjust or repair only after the engine has been
stopped and the tines have stopped moving.
- Replace parts if worn, damaged or faulty.
For best results, always replace with parts
recommended by the manufacturer.
- Disconnect battery or remove spark plug wire(s)
before making any repairs. Disconnect the
negative terminal first and the positive last. Re-
connect positive first and negative last.
- Do not dismantle the machine without releasing
or restraining forces which may cause parts to
move suddenly.
- Provide adequate support, e.g. jackstands for
lifted machine or parts if working beneath.
- Do not put hands or feet near or under rotating
parts.
- Clean up spilled oil or fuel thoroughly.
- Replace faulty mufflers.
- To reduce fire hazards, keep the engine, muffler,
battery compartment and fuel storage area free
of grass, leaves, debris buildup or grease.
Tines
- Tines can be sharp and can
cut. Use extra caution when
handling. Remove obstruc-
tions with care.
- Be aware that moving one
tine can cause other tines to
move.
- Only replace tines. Never straighten or weld
them.
- Keep other persons away from tines.
Fuel
- Gasoline and diesel fuels
are flammable; gasoline
vapors are explosive. Use
extra care when handling.
- Store only in containers
specifically designed for
fuel.
- When refueling or checking fuel level:
- Stop the engine and allow to cool;
- Do not smoke;
- Refuel outdoors only;
- Use a funnel;
- Do not overfill;
- If fuel is spilled, do not attempt to start the
engine until the spill is cleaned up and vapors
have cleared.
- Do not fill containers in a vehicle or on a truck or
trailer bed with a plastic liner. Fill containers on
the ground away from the vehicle.
- When practical, remove gas powered equip-
ment from the truck or trailer and refuel it on the
ground. If equipment must be refueled on the
truck or trailer, refuel from a portable container
rather than a dispenser nozzle.
Keep the dispenser nozzle in contact with the rim
of the fuel tank or container opening until fueling
is complete. Do not use a nozzle lock-open
device.
- Replace caps on fuel cans and tanks securely.
WARNING
WARNING
SAFETY

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- Stop the engine and allow to cool before storing.
- Drain the fuel tank outdoors only.
- Store fuel in an approved container in a cool, dry
place.
- Keep the machine and fuel containers in a locked
storage place to prevent tampering and to keep
children from playing with them.
- Do not store the machine or fuel container near
heating appliances with an open flame such as a
water heater or an appliance with a pilot light.
- Keep gasoline storage area free of grass, leaves
and excessive grease to reduce fire hazard.
- Clean grass and debris from cutting units, drives,
mufflers and engine to help prevent fires.
TRANSPORTATION AND STORAGE SAFETY
SAFETY

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LABELS

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LABELS

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SET-UP
GENERAL NOTE: FRONT, REAR, RIGHT HAND AND LEFT HAND REFERENCES BELOW
ARE WITH RESPECT TO AN OPERATOR AT THE CONTROLS.
UNPACKING - Unpacking the aerator entails
securing the handle and rolling the unit off the
shipping pallet.
1. Cut the banding securing the aerator to the pallet
Banding is under tension and may snap back
when cut. Wear eye protection and stay clear
when cutting the band.
2. Unhook the two side latches. Pivot the hood
forward and remove it from the aerator.
3. Remove the two loose parts bags tied to the unit.
These bags contain the hardware required for
set-up and an extra set of tines.
4. Remove the (6) six bolts securing the handle
cover to the handle and remove the handle
cover.
5. Apply a solution of soap and water to the rubber
isolators Aon the handle and, while holding the
clutch and latch rods up in their approximate
position, slide the handle into the handle
mounts B. The outside flange of the handle
mount should be loosened to allow the handle to
be inserted to the proper position.
6. Secure the handle with two (2) 3/8-16 X 2 1/2"
screws with locknuts (from hardware bag).
Tighten only until snug. The handle must be free
to move in the rubber mount.
7. Cut the plastic tie from the clutch lever on top of
the handle. Connect the clutch lever rod Cto the
linkage bellcrank Dand secure it with the
5/16" washer and hairpin cotter from the
hardware bag.
8. Unhook the spring from the latch E. Slide the
hole in the end of the latch rod Fover the pin on
the latch and secure with the 1/2" washer and
cotter pin. Reconnect the spring to the latch.
Cut the safety tie from the latch after the rod and
spring have been attached.

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SET-UP
9. Push the latch lever (on the handle) to raise and
lower the unit. If the latch drops into the notch
easily, when raised and lowered, proceed to step
10. Remove hairpin cotter Ifrom rod G. Pull rod
from Pivot Shaft and adjust by turning rod so
that the latch drops into the notch easily when
the unit is lowered. Operating the clutch lever
with the unit lowered, will allow the rod to be
removed for adjustment.
10. Operate the clutch lever to check for positive belt
engagement. If belt needs adjustment, refer to
Drive Belt Adjustment (page 17).
11. Reisntall the handle cover assembly. Route the
throttle cable as shown, under the handlebar
support 1. Route the throttle cable through the
clip 2, and then over the handle bar tube. (Note:
For ease of cover assembly, the throttle control
cable can be removed, then reinstalled.)
12. Install the engine on/off switch 3. Cut the plastic
tie holding the wire harness. Route the wire
harness along the handlebar tube 4. Connect
the harness to the switch 5. The notch in
the connector goes on the terminal with the
formed detent. Secure the wire harness to the
handlebars with two plastic ties 6.

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13. HONDA THROTTLE HOOK-UP:
(See step 14 for Briggs throttle hookup.)
-Remove the air cleaner.
-Using a 10mmm socket or wrench, slightly
loosen the engine throttle pivot nut 7, 1/8 of a
turn. (this is approximate, adjust as required for
proper throttle control feel.)
-Attach the throttle cable as shown, with the
"Z-bend" end put into the hole 8in the carburetor
lever.
-Remove the cable clamp 9on the engine.
-Route the cable under the clamp, and replace
the cable clamp leaving it loose.
-Move the throttle control lever on the handle to
the fast position, then pull back about 1/8".
-On the engine, move the throttle lever 10 to the
fully fast position (far left).
-Tighten cable clamp 9.
14. BRIGGS THROTTLE HOOK-UP:
-Remove the cable clamp on the engine 11.
-Insert the "Z-bend" end of the throttle cable into
the hole 12 on the throttle arm
-Reinstall the cable clamp leaving it loose with
the cable below the mounting screw.
-Move the throttle control lever on teh handle to
the "FAST" position, then pull back about 1/8".
-On the eninge, move the throttle lever to the fully
fast position (far right).
-Tighten the cable clamp screw.
15. Check the engine oil level (best when done with
the machine lowered to the aerating position.)
16. Raise the machine to the transport position and
add fuel and start the engine. (Refer to Controls
on P. 12 if necessary)
17. Check for full range of throttle movement, and
adjust cable position 9or 11 if necessary.
18. Stop the engine using the key switch, and
replace the air cleaner on Honda engines.
19. Reinstall the hood.
SET-UP

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CONTROLS
ENGINE CONTROLS
The engines are equipped with a choke control and
and a fuel shut-off valve.
Choke (A): Choke as required to start the engine
(slide control).
Fuel Shut-Off Valve (B): Turn the valve lever to
"ON" (horizontal position) to allow fuel to flow from
the tank to the engine.
Handle Mounted Engine Shut-Off Key Switch (D):
The handle bar mounted key switch needs to be
in the ON position to start the engine. To stop the
engine turn the key switch to the OFF position.
Engine Shut-Off Switch (C): Leave the engine
switch in the ON position. The Handle Mounted
Engine Shut-Off Key Switch is used to start and stop
engine.
BRIGGS: This switch is located under the hood, on
the right side of the engine toward the front of the
unit.
HONDA: This switch is located on the front right side
of the unit.
BRIGGS ENGINE:
HONDA ENGINE:

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CONTROLS
AERATOR CONTROLS
The aerator is equipped with a Dog Clutch Lever
C, Latch Lock Lever D, Clutch Lever Eand Throttle
Control F.
Dog Clutch Lever: Controls the drive mechanism.
Push the lever down to engage the dog clutch, pull
up to disengage. The aerator drive will not operate
unless the dog clutch is engaged.
Latch Lock Lever: Locks the aerator in the up or
down position. To lower the unit and engage the
aerator, push the Latch Lock Lever and push down
on the handlebar. To raise the unit and disengage
the aerator, push the Latch Lock Lever and pull up on
the handlebar.
Clutch Lever: Engages the unit drive. Pull back on
the Clutch Lever with the unit raised to transport the
unit without operating the aeration mechasism. Pull
back on the Clutch Lever with the unit lowered to
move the unit forward and begin aerating.
Throttle Control: Adjusts the engine speed.
Pushing the control forward increases the speed;
pulling the control back reduces the speed.

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OPERATION
PRE-OPERATION CHECK
1. Visually check all moving parts and all fasteners.
If loose or broken, tighten or replace. Check
for and replace any broken, bent or excessively
worn tines.
2. Lubricate all lubrication fittings before each days
use or after every eight hours of operation (see
SERVICE section).
3. Check the engine crankcase oil level with the
engine resting in a level position. Add oil if
necessary (see SERVICE section).
4. Follow the engine manufacturer's
recommendations for the correct type and
amount of oil. Fill the fuel tank according to the
engine manufacturer's specifications.
Gasoline is extremely flammable and highly
explosive under certain conditions. Always stop
the engine and do not smoke or allow open
flames or sparks when refueling. BE SURE to
install fuel cap after refueling.
NEVER start or run the engine inside where exhaust
fumes can collect. Carbon monoxide present in the
exhaust is an odorless and deadly gas.
DO NOT operate equipment without shields in place.
DO NOT make adjustments or perform any
maintenance while the engine is running.
Before operating, check the area and remove any
object which may present a safety hazard or damage
the equipment.
This unit is not designed to be used on steep slopes.
To prevent injury and/or damage to equipment, use
extreme caution when operating near terraces or hilly
terrain. Travel up and down slopes at a 45 degree
angle rather that across, to prevent unit from tipping
over, DO NOT release clutch handle on a slope; this
will cause freewheeling, allowing the unit to roll down
the slope.

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OPERATION
AERATING
NOTE: For best performance and maximum tine
penetration, the lawn should be thoroughly
watered the day before aeration. Compacted soil
conditions will cause the unit to bounce, resulting in
possible damage to the tines and undue stress to the
unit
DO NOT operate unit unless all shields are in place.
DO NOT make any adjustments or perform any
maintenance while the engine is running.
Before operating, check the area to be aerated and
remove any objects that may be a safety hazard or
cause damage to the unit.
DO NOT place hands or feet beneath the unit at any
time.
NOTE: Never cross hard objects or surfaces (such
as sidewalks, driveways, stepping stones,
etc.) with aerator in the lowered position.
OPERATION TIP
NOTE: Walk through the area to be aerated and
mark with flags immovable objects, such as sprinkler
heads and water mains.
Be sure the unit is raised, and the fuel shut-off valve
on the bottom of the fuel tank is open.
1. Set the throttle control lever to a "middle"
position. Place engine key switch in the
"ON" position. Pull recoil starter and choke if
necessary to start engine.
2. Slowly pull back on the clutch lever and adjust
the throttle for a comfortable transport speed.
Transport the unit to the work area.
3. Upon reaching the work area, release the clutch
lever. Lower the aerator, push the throttle lever
all the way forward to "FAST" and pull the clutch
lever back to start aerating.
Aerate across slopes or on steeper grades at a
450angle up and down the slope.
The unit is designed to make turns while
aerating. If the tines damage the turf while
making turns, push down on the handlebars
while turning to help eliminate the problem.
4. Release the clutch lever and raise the aerator
when aerating is completed.
When replacement parts are required, use
genuine Schiller Grounds Care, Inc. parts or
parts with equivalent characteristics, including
type, strength and material. Failure to do so may
result in product malfunction and possible injury to
the operator and/or bystanders.
Replace any warning decal that becomes illegible.
Do not operate equipment without shields in
place.
Do not make any adjustments or perform any
maintenance while the engine is running.

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SERVICE
CLEANING
After each day's aerating, remove and thoroughly clean the tines. Apply a light coating of oil to the tines to
prevent rust. Replace bent, broken or worn tines and reinstall the tines on the unit. After the engine has
cooled, clean the unit with water. Keep the belts free of oil and dirt.
LUBRICATION
Lubrication Fittings - A: The Lawnaire 28 has
eight grease fittings. (1) Front wheel pivot, (5) Pivot
axle, (2) Differential. Use a standard lithium based
grease to lubricate all eight fittings after every eight
hours of operation. Wipe each fitting before and after
lubricating.
Reversing Gear Boxes - B: Lubrication filled gear
boxes should require no additional lubrication, add
lithium based gun lubricant if required.
Transmission - C: Remove plug, fill to bottom of
plug opening with 80-90W gear lube.
TRANSPORTING
Close the fuel shut-off valve before transporting.
Loading; When using ramps to load the unit for transporting, be sure all three wheels are supported by
ramps.
Unloading; When using ramps to unload the unit, engage the dog clutch (lever down) to keep the unit
from rolling down the ramp too quickly.
TIRE PRESSURE
NOTE: Improper inflation will shorten tire life
considerably.
Check tire pressure before each days
operation. Keep all three tires inflated to 14-16 PSI
(97-110 kPa).
Use caution when inflating a tire, or bringing a low
tire up to recommended pressure. Use a pressure
gauge to check the pressure in a partially inflated tire
before connecting an air hose. Due to the low air
volume requirements of small tires, over-inflation may
reached in a matter of two or three seconds, which
may cause the tire to explode.

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SERVICE
BELT REMOVAL AND INSTALLATION
1. Remove the shield covering the aerator
mechanism.
2. Remove the two screws Asecuring the ends of
the pulley shaft.
3. Remove the hardware from the idler shaft pillow
blocks C. Move the idler shaft Bback (toward
the rear of the unit) to release the tension on the
idler drive belt Eand aerator chains Hand J.
4. Remove the LEFT aerator chain J.
5. Remove both the Idler Drive Belt Eand the Drive
Belt D.
6. Put on new belts and reinstall the two screws A
securing the ends of the pulley shaft.
7. Make sure the RIGHT aerator chain His properly
meshed with the sprocket on the idler shaft and
reinstall the pillow block on the RIGHT side of
the idler shaft. DO NOT tighten the pillow block
hardware.
8. Time the aerator by positioning the inner two
crank arms Glevel and to the back of the unit
(the outer two crank arms Fwill be level and to
the front).
9. Install the LEFT aerator chain Jand the pillow
block at the LEFT side of the idler shaft (a pry bar
may be necessary to align the holes in the pillow
block flange and the frame).
10. Tighten the hardware on both pillow blocks.
DRIVE BELT ADJUSTMENT
11. Pull back on the clutch lever to engage the
drive belt. Adjust the nut Lon the Drive Belt
Adjustment Screw (until there is a 3/16" (5mm)
deflection by four pounds of force on the side of
the drive belt opposite the transmission
12. Reinstall shields before operating the unit.

18
Lawnaire
28
SERVICE
TRANSMISSION REMOVAL
1. Remove the shield covering the aerator
mechanism.
2. Loosen primary drive chain adjustment screw M.
3. Open the connector link of the primary drive
chain Nand remove the chain from the unit.
4. Disconnect the drive belt adjustment screw L
from the bellcrank and detach the tension spring
Ofrom the top of the transmission.
5. Take out the two transmission mounting screws
Pand remove the transmission with the clutch
mounting bracket R.
6. Remove the clutch mounting bracket Rfrom the
transmission.
7. Remove the screw securing the dog clutch
sprocket to the output shaft and pull the sprocket
from the shaft.