John Deere LT133, LT155, LT166 Technical Manual
LT133, LT155 & LT166
Lawn Tractors
TECHNICAL
MANUAL
John Deere
Worldwide Commercial and
Consumer Equipment Division
TM1695 (20Sep00)
Replaces TM1695 (15Sep98)
Litho in U.S.A
M85699
M85700
M85701
This technical manual is written for an experienced
technician and contains sections that are specifically for
this product. It is a part of a total product support
program.
The manual is organized so that all the information on a
particular system is kept together. The order of grouping
is as follows:
• Table of Contents
• General Diagnostic Information
• Specifications
• Electrical Wiring Harness Legend
• Component Location
• System Schematic
• Wiring Harness
• Troubleshooting Chart
• Theory of Operation
• Diagnostics
• Tests & Adjustments
• Repair
INTRODUCTION
Safety
Specifications and
Information
Kohler Engines
Briggs & Stratton Engine
Electrical
P ower Train (Gear)
Note: Depending on the particular section or system
being cove red, not all of the abo ve groups may be
used.
Each section will be identified with a symbol rather than a
number. The groups and pages within a section will be
consecutively numbered.
We appreciate your input on this manual. To help, there
are postage paid post cards included at the back. If you
find any errors or want to comment on the layout of the
manual please fill out one of the cards and mail it back to
us.
All information, illustrations and
specifications in this manual are based on
the latest information available at the time of
publication. The right is reserved to make
changes at any time without notice.
P ower Train (Hydrostatic)
Steering
Brakes
Attachments
Miscellaneous
9/25/00
COPYRIGHT
Deere and Co.
John Deere Worldwide Commercial and
Consumer Equipment Division
Horicon, WI
All rights reserved
©
2000
1 - 1
SAFETY
SAFETY
RECOGNIZE SAFETY INFORMATION
This is the safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the potential for personal injury.
Follow recommended precautions and safe servicing
practices.
HANDLE FLUIDS SAFELY-AVOID
FIRES
BE PREPARED FOR EMERGENCIES
UNDERSTAND SIGNAL WORDS
A signal word—DANGER, WARNING, or CAUTION—is
used with the safety-alert symbol. DANGER identifies
the most serious hazards.
DANGER or WARNING safety signs are located near
specific hazards. General precautions are listed on
CAUTION safety signs. CAUTION also calls attention to
safety messages in this manual.
REPLACE SAFETY SIGNS
When you work around fuel, do not smoke or work near
heaters or other fire hazards.
Store flammable fluids away from fire hazards. Do not
incinerate or puncture pressurized containers.
Make sure machine is clean of trash, grease, and debris.
Do not store oily rags; they can ignite and burn spontaneously.
Be prepared if a fire starts.
Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for do ctors, am bulance s ervice, hospital, and fire departme nt near yo ur telep hone.
Replace missing or damaged safety signs. See the machine operator’s manual for correct safety sign placement.
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SAFETY
USE CARE IN HANDLING AND
SERVICING BATTERIES
PREVENT BATTERY EXPLOSIONS
• Keep sparks, lighted matches, and open flame
away from the top of battery. Battery gas can
explode.
• Never check battery charge by placing a metal
object across the posts. Use a volt-meter or
hydrometer.
• Do not charge a frozen battery; it may explode.
Warm battery to 16°C (60°F).
PREVENT ACID BURNS
• Sulfuric acid in battery electroly te is poisonous. It is
strong enough to burn skin, eat holes in clothing,
and cause blindness if splashed into eyes.
USE SAFE SERVICE PROCEDURES
WEAR PROTECTIVE CLOTHING
Wear close fitting clothing and safety equipment appropriate to the job.
Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear a suitable hearing protective device such as earmuffs or earplugs to protect
against objectionable or uncomfortable loud noises.
Operating equipment safely requires the full attention of
the operator. Do not wear radio or music headphones
while operating machine.
SERVICE MACHINES SAFELY
• Avoid acid burns by:
1. Filling batteries in a well-ventilated area.
2. Wearing eye protection and rubber gloves.
3. Av oiding brea thing fumes when ele ctrolyte is
added.
4. Avoiding spilling or dripping electrolyte.
5. Use proper jump start procedure.
• If you spill acid on yourself:
1. Flush your skin with water.
2. Apply baking soda or lime to help neutr aliz e the
acid.
3. Flush your eyes with water for 10_15 minutes.
4. Get medical attention immediately.
• If acid is swallowed:
1. Drink large amounts of water or milk.
2. Then drink milk of magnesia, beaten eggs, or
vegetable oil.
3. Get medical attention immediately.
Tie long hair behind your head. Do not wear a necktie,
scarf, loose clothing, or necklace when you work near
machine tools or moving parts . If these items were to
get caught, severe injury could result.
Remove rings and other jewelry to prevent electrical
shorts and entanglement in moving parts.
USE PROPER TOOLS
Use tools appropriate to the work. Makeshift tools and
procedures can create safety hazards. Use power tools
only to loosen threaded parts and fasteners. For loosening and tightening hardware, use the correct size tools.
DO NOT use U.S. measurement tool s on metric fasteners. Avoid bodily injury caused by slipping wrenches.
Use only service parts meeting John Deere specifications.
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SAFETY
PARK MACHINE SAFELY
Before working on the machine:
1. Lower all equipment to the ground.
2. Stop the engine and remove the key.
3. Disconnect the battery ground strap.
4. Hang a “DO NOT OPERATE” tag in operator
station.
SUPPORT MA CHINE PROPERLY AND USE
PROPER LIFTING EQUIPMENT
USING HIGH PRESSURE WASHERS
Directing pressurized water at electronic/ele ctrical components or connectors, bearings, hydraulic seals, fuel
injection pumps or other sensitive parts and components may cause product malfunctions. Reduce pressure and spray at a 45 to 90 degree angle.
ILLUMINATE WORK AREA SAFELY
Illuminate your work area adequately but safely. Use a
portable safety light for working inside or under the machine. Make sure the bulb is enclos ed by a wire cage.
The hot filament of an accidentally broken bulb can ignite spilled fuel or oil.
WORK IN VENTILATED AREA
If you must work on a lifted machine or attachment, securely support the machine or attachment.
Do not support the machine on cinder blocks, hollow
tiles, or props that may crumble under continuous load.
Do not work under a machine that is supported solely by
a jack. Follow recommended procedures in this manual.
Lifting heavy components incorrectly can cause severe
injury or machine damage. Follow recommended procedure for removal and installatio n of components in the
manual.
WORK IN CLEAN AREA
Before starting a job:
1. Clean work area and machine.
2. Make sure you ha v e all necessary tools to do your
job.
3. Have the right parts on hand.
4. Read all instructions thoroughly; do not attempt
shortcuts.
Engine exhaust fumes can cause sickness or death. If it
is necessary to run an engine in an enclosed area, remove the exhaust fumes from the area with an exhaust
pipe extension.
If you do not have an exhaust pipe extension, open the
doors and get outside air into the area.
W ARNING: CALIFORNIA PROPOSITION 65
WARNING
Gasoline engine exhaust from this product contains
chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
REMOVE PAINT BEFORE WELDING OR
HEATING
Avoid potentially toxic fumes and dust. Hazardous
fumes can be generated when paint is heated by welding, soldering, or using a torch. Do all work outside or in
a well ventilated area. Dispose of paint and solvent
properly. Remove paint before welding or heating : If you
sand or grind paint, avoid breathing the dust. Wear an
approved respirator. If you use solvent or paint stri pper,
remove stripper with soap and water before welding.
Remove solvent or paint stripper containers and other
flammable material from area. Allo w fumes to dispe rse
at least 15 minutes before welding or heating.
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SAFETY
AVOID HARMFUL ASBESTOS DUST
Avoid breathing dust that may be generated when
handling components containing asbestos fibers.
Inhaled asbestos fibers may cause lung cancer.
Components in products that may contain asbestos
fibers are brake pads, brake band and lining assemblies, clutch plates, and some gask ets. The asbestos
used in these components is usually found in a resin or
sealed in some way. Normal handling is not hazardous
as long as airborne dust containing asbestos is not
generated.
Avoid creating dust. Never use compressed air for
cleaning. Avoid brushing or grinding material containing
asbestos. When servicing, wear an appr oved respirator. A special vacuum cleaner is recommended to clean
asbestos. If not available, apply a mist of oil or water on
the material containing asbestos. Keep bystanders
away from the area.
SERVICE TIRES SAFELY
AVOID INJURY FROM ROTATING
BLADES, AUGERS AND PTO
SHAFTS
Keep hands and feet away while machine is running.
Shut off power to service, lubricate or remove mower
blades, augers or PTO shafts.
HANDLE CHEMICAL PRODUCTS
SAFELY
Explosive separation of a tire and rim parts can cause
serious injury or death.
Do not attempt to mount a tire u nless you have the proper equipment and experience to perform the job.
Always maintain the correct tire pressure. Do not inflate
the tires above the recommended pressure. Never we ld
or heat a wheel and tire assembly. The heat can cause
an increase in air pressure resulting in a tire explosion.
Welding can structurally weaken or deform the wheel.
When inflating tires, use a clip-o n chuck an d extens ion
hose long enough to allow you to stand to one side and
NOT in front of or over the tire assembly. Use a safety
cage if available.
Check wheels for low pressure, cuts, bubbles, damaged
rims or missing lug bolts and nuts.
Direct exposure to hazardous chemicals can cause serious injury. Potentially hazardous chemicals used with
John Deere equipment include such items as lubricants,
coolants, paints, and adhesives.
A Material Safety Data Sheet (MSDS) provides specific
details on chemical products: physical and health hazards, safety procedures, and emergency response
techniques. Check the MSDS before you start any job
using a hazardous chemical. That way you will know exactly what the risks are and how to do the job safely.
Then follow procedures and recommended equipment.
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SAFETY
DISPOSE OF WASTE PROPERLY
Improperly disposing of waste can threaten the environment and ecology. Potentially harmful waste used with
John Deere equipment include such items as oil, fuel,
coolant, brake fluid, filters, and batteries. Use le akproof
containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them. Do not pour waste onto the ground,
down a drain, or into any water source. Inquire on the
proper way to recycle or dispose of waste from your local environmental or recycling center, or fro m your John
Deere dealer.
LIVE WITH SAFETY
Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields.
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SPECIFICATIONS AND INFORMATION
GENERAL VEHICLE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3
METRIC FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
METRIC FASTENER TORQUE VALUE—GRADE 7. . . . . . . . . . . . . . . . . . . . . . . . . . 7
INCH FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GASOLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GASOLINE STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ENGINE OIL - KOHLER ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ENGINE OIL - BRIGGS & STRATTON ENGINE. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ENGINE BREAK–IN OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ANTI-CORROSION GREASE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ALTERNATIVE LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
SYNTHETIC LUBRICANTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LUBRICANT STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
MIXING OF LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CHASSIS GREASE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
GEAR TRANSMISSION GREASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
HYDROSTATIC TRANSMISSION OIL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SERIAL NUMBER LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CONTENTS
CONTENTS
Page
SPECIFICATIONS
9/25/00
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NOTES
SPECIFICATIONS AND INFORMATION
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9/25/00
SPECIFICATIONS AND INFORMATION
GENERAL VEHICLE SPECIFICATIONS
ENGINE SPECIFICATIONS
KOHLER ENGINES—LT 133 and LT155
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kohler
Model / Model Number:
LT133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command LT / CV13S-21525
LT155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Command 15 QT / CV15S-41562
Power:
LT133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.7 kW (13.0 hp)
LT155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 kW (15.0 hp)
Displacement:
LT133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .398 cm
LT155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .426 cm
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Stroke/Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Overhead Valves
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressurized
Oil Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Element, Full Flow, Spin-On Filter
Crankcase Capacity (With Filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 L (1.9 qt)
Without Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (1.5 qt)
Cooling System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Cooled
Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper with outer foam element
Muffler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Horizontal discharge below frame
Spark Plug Gap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm (0.040 in.)
GENERAL VEHICLE SPECIFICATIONS
3
(24.3 cu-in.)
3
(26.0 cu-in.)
BRIGGS & STRATTON—LT166
Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Briggs & Stratton
Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vanguard V-Twin
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .916928 Gasoline
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303777
Horsepower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.9 kW (16.0 hp)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480 cm
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Stroke/Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Overhead Valves
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressurized
Oil Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Full Flow Filter (w/o By-Pass Valve)
Crankcase Capacity (With Filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 L (1.6 qt)
Without Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 L (1.5 qt)
Cooling System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Cooled
Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paper with outer foam element
Muffler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Horizontal discharge below frame
Spark Plug Gap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm (0.040 in.)
ELECTRICAL
Ignition. . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Capacitor Discharge Ignition (CDI)
Type of Starter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bendix
Charging System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flywheel Alternator
3
(29.3 cu. in.)
9/25/00
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