Toro 520XI, 5xi Series, 518xi, 522xi, 520Lxi Service Manual

...

5XI SERIES TRACTOR SERVICE MANUAL

Table of Contents – Page 1 of 2

SAFETY INFORMATION

SPECIFICATIONS PRODUCT LINEUP TRACTOR SPECIFICATIONS ATTACHMENTS AND ACCESSORIES (PARTIAL LISTING) ENGINE SPECIFICAT IONS (AIR- CO O LED) ENGINE SPECIFICATIO NS (LIQUI D- COO LED)

MAINTENANCE TABLE SERVICE SCHEDULE

CHASSIS MODEL/SERIAL NUMBER LOCATION GREASING AND LUBRICATION REAR FENDERS, FOOTRESTS, & TUNNEL FRONT WHEEL TOE-IN STEERING WHEEL POWER STEERING SMART TURNÉ STEERING MOTION CONTROL PEDAL TIRE PRESSURE FUEL TANK SHUT-OFF VALVE ELECTRIC PTO CLUTCH DRIVE SHAFT

HYDROSTATIC DRIVE TROUBLESHOOTING TRANSAXLE FLUID BRAKE NEUTRAL ADJUSTMENT

GASOLINE ENGINE TROUBLESHOOTING ENGINE CRANKS BUT WILL NOT START. STARTER DOES NOT CRANK. ENGINE STARTS BUT DOES NOT KEEP RUNNING. ENGINE IS DIFFICULT TO START. ENGINE RUNS BUT KNOCKS OR MISSES. ENGINE WILL NOT IDLE. ENGINE OVERHEATS. ENGINE LOSES POWER. ENGINE KNOCKS. AIR CLEANER ENGINE OIL OIL FILTER SPARK PLUG FUEL FILTER

5XI SERIES TRACTOR SERVICE MANUAL

Table of Contents – Page 2 of 2

GASOLINE ENGINE - continued COOLING SYSTEM, AIR COOLING SYSTEM, LIQUID

DIESEL ENGINE TROUBLESHOOTING ENGINE CRANKS BUT WILL NOT START. STARTER DOES NOT CRANK. ENGINE STARTS BUT DOES NOT KEEP RUNNING. ENGINE IS DIFFICULT TO START. ENGINE RUNS BUT KNOCKS OR MISSES. ENGINE WILL NOT IDLE. ENGINE OVERHEATS. ENGINE LOSES POWER. ENGINE KNOCKS. EXCESSIVE BLACK SMOKE FROM EXHAUST. EXCESSIVE W H IT E SMOKE FRO M EX HAU ST. AIR CLEANER ENGINE OIL OIL FILTER COOLING SYSTEM ENGINE MOUNTS FUEL SYSTEM GLOW PLUGS

ELECTRICAL BATTERY FUSE HEADLIGHTS INSTRUMENT PANEL LIGHTS TAILLIGHTS ELECTRIC CLUTCH TROUBLESHOOTING SAFETY INTERLOCK SYSTEM CRUISE CONTROL FUEL GAUGE CHARGING SYSTEM SCHEMATICS

TORO

5xi Series

Tractor

Service Manual

ABOUT THIS MANUAL

This service manual was written expressly for Toro Wheel Horse 5xi series garden tractors. The Toro Company has made every effort to make the information in this manual complete and correct.

This manual was written for the service technician; basic mechanical/electrical skills are assumed. The Table of Contents lists the systems and the related topics covered in this manual.

For information on the electrical system, please refer to the Toro Electrical Demystification Guide (492-4404). For information specific to the engines used on these garden tractors, refer to the appropriate engine manufacturer’s service and repair instructions.

We are hopeful that you will find this manual a valuable addition to your service shop. If you have any questions or comments regarding this manual, please contact us at the following address:

The Toro Company Consumer Service Training Department 8111 Lyndale Avenue South Bloomington, MN 55420

The Toro Company reserves the right to change product specifications or this manual without notice.

QUICK REFERENCE SECTION

Safety Information..............................................

Specifications .................................................

Maintenance Table .............................................

SERVICE SECTION

Chassis.........................................................

Hydrostatic Drive .................................................

Gasoline Engine..................................................

Diesel Engine ....................................................

Electrical........................................................

TABLE OF CONTENTS

5xi Series Tractor Service Manual 1-1

Table of Contents

SAFETY INFORMATION

General Information ..................................... 1-3

Think Safety First ....................................... 1-3

SPECIFICATIONS

Product Lineup......................................... 1-4

Tractor Specifications ................................... 1-4

Attachments and Accessories ............................. 1-5

Engine Specifications ................................... 1-6

MAINTENANCE TABLE ..................................... 1-7

QUICK REFERENCE

1-2 5xi Series Tractor Service Manual

This symbol means WARNING or PERSONAL SAFETY INSTRUCTION - read the instruction because it has to do with your safety. Failure to comply with the instruction may result in personal injury or even death.

This manual is intended as a service and repair manual only. The safety instructions provided herein

are for troubleshooting, service, and repair of the 5xi series garden tractor. The tractor and attachment operator’s manuals contain safety information and operating tips for safe operating practices. Operator’s manuals are available through your local Toro distributor or:

The Toro Company Publications Department 8111 Lyndale Avenue South Bloomington, MN 55420

Avoid unexpected starting of engine...

Always turn off the engine and disconnect the spark plug wire(s) before cleaning, adjusting, or repair.

Avoid lacerations and amputations...

Stay clear of all moving parts whenever the engine is running. Treat all normally moving parts as if they were moving whenever the engine is running or has the potential to start.

Avoid burns...

Do not touch the engine, muffler, or other components which may increase in temperature during operation, while the unit is running or shortly after it has been running.

Avoid fires and explosions...

Avoid spilling fuel and never smoke while working with any type of fuel or lubricant. Wipe up any spilled fuel or oil immediately. Never remove the fuel cap or add fuel when the engine is running. Always use approved, labeled containers for storing or transporting fuel and lubricants.

Avoid asphyxiation...

Never operate an engine in a confined area without proper ventilation.

Avoid injury from batteries...

Battery acid is poisonous and can cause burns. Avoid contact with skin, eyes, and clothing. Battery gases can explode. Keep cigarettes, sparks, and flames away from the battery.

Avoid injury due to inferior parts...

Use only original equipment parts to ensure that important safety criteria are met.

Avoid injury to bystanders...

Always clear the area of bystanders before starting or testing powered equipment.

Avoid injury due to projectiles...

Always clear the area of sticks, rocks, or any other debris that could be picked up and thrown by the powered equipment.

Avoid modifications...

Never alter or modify any part unless it is a factory approved procedure.

Avoid unsafe operation...

Always test the safety interlock system after making adjustments or repairs on the machine. Refer to the Electrical chapter later in this manual for more information.

THINK SAFETY FIRST

SAFETY INFORMATION

5xi Series Tractor Service Manual 1-3

Tractor Specifications

Item 73470 73540

(73541)

73560 73545

(73546)

73550 (73551)

Fuel Tank Capacity 4.25 gal

(16.1l)

4.25 gal (16.1l)

Hydraulic System Capacity 6 Qts (5.7l) 6 Qts (6.6 l) 7 Qts (6.6 l) 7 Qts (6.6 l) 7 Qts (6.6 l)

Battery Size (Cold Cranking Amps) 12V 380CCA 12V 380CCA 12V 380CCA 12V 380CCA 12V 495CCA

Ground Speed Forward (High Range) 0-7.4 mph

(11.9 km/hr)

0-7.4 mph (11.9 km/hr)

Ground Speed Forward (Low Range) 0-4.4 mph

(7.1 km/hr)

0-4.4 mph (7.1 km/hr)

Ground Speed Reverse (High Range)

0-3.4 mph (5.48 km/hr)

Tire Size - Front 16 x 7.5-8 16 x 7.5-8 16 x 7.5-8 16 x 7.5-8 16 x 7.5-8

Tire Size - Rear 23 x 10.5-12 23 x 10.5-12 23 x 10.5-12 23 x 10.5-12 23 x 10.5-12

Tire Pressure 12 psi

(82.7 kPa)

12 psi (82.7 kPa)

Wheel Base 52 in

(132.1 cm)

52 in (132.1 cm)

Turning Radius 20 in

(50.8 cm)

20 in (50.8 cm)

Total Width 40.5 in

(102.8 cm)

40.5 in (102.8 cm)

Length 76.5 in

(196.9 mm)

76.5 in (196.9 mm)

Note: Specifications shown are for 1998 models. Subsequent production may vary. As part of a continuous improvement process, the Toro Company reserves the right to change specifications without notice.

Product Lineup

Model (International)

Name Engine HP Drive Type

73470 518xi Kohler 18 Eaton 11 Hydro, 2 speed Uni-Drive® transaxle 73540 (73541) 520xi Kohler 20 Eaton 11 Hydro, 2 speed Uni-Drive® transaxle 73560 522xi Kohler 22 Eaton 11 Hydro, 2 speed Uni-Drive® transaxle 73545 (73546) 520Lxi Kawasaki 20 Eaton 11 Hydro, 2 speed Uni-Drive® transaxle

73550 (73551) 523Dxi Daihatsu 23 Eaton 11 Hydro, 2 speed Uni-Drive® transaxle

SPECIFICATIONS

1-4 5xi Series Tractor Service Manual

Attachments and Accessories (partial listing)

Part # (International) Description Drive Belt Spindle Belt

78353 (78442) 42" Rear Discharge Mower

95-4093

95-4230

78357 (78444) 44" Side Discharge Mower

95-4094

95-4228

78358 44" Recycler® Mower

95-4094

95-4228

78363 (78448) 48" Side Discharge Mower

95-4095

95-3878

78364 48" Recycler® Mower

95-4095

95-3878

78370 (78452) 52" Side Discharge Mower

95-4094

94-2501

78375 52" Recycler® Mower

95-4094

94-2501

78395 (78469) 60" Side Discharge Mower

95-4093

95-4229

79375* 36" Tiller

Front 94-7877

Rear 94-7878

79355* 48" Snow/Dozer Blade

79356* 50" Mid-Mount Grader Blade

79305 (79444) 44" Vac/Bagger

93-8007

79310 (79448) 48" Vac/Bagger

79-7490

79977 Front Mount Dethatcher

79365 42" Single Stage Snowthrower

95-3918

79366 *** 44" Two Stage Snowthrower

95-3917

79919 Snow Cab

79210 Roll-Over-Protection System (ROPS)

95-4220 Rear Attach-A-Matic® (from Parts)

79947** Bucket Loader

94-2050 Dual Wheel Adapter Kit (From Parts)

94-7800 Clevis Hitch (From Parts)

94-4090 48" Blade Retrofit Kit (From Parts)

95-4091 Diesel Block Heater (From Parts)

95-7858 Sidelight Kit (From Parts)

86041 44" Recycler® Kit 79195 48" Recycler® Kit 79185 52" Recycler® Kit

79948 Weight Box

* Requires 95-4220 Rear Attach-A-Matic® ** Requires 79948 weight Box ***Requires rear wheel weights, 95-4220 Rear Attach-A-Matic®

SPECIFICATIONS

5xi Series Tractor Service Manual 1-5

Engine Specifications (air-cooled)

Item 73470 73540 (73541) 73560

Manufacturer/Model Kohler/CH18S Kohler/CH20S Kohler/CH22S

Horsepower (kW) 18 HP (13.4 kW) 20 HP (14.9 kW) 22 HP (16.4 kW)

Oil Viscosity Over 0° F (-18° C)

Below 32°F (0° C)

10W-30 5W-20 or 5W-30

Oil Capacity (With Filter) 2.1 Qts. (2 l) U.S. Qts. U.S. Qts. U.S. Qts.

Spark Plug (Champion # Shown) RC12YC RC12YC RC12YC

Spark Plug Gap .030 in (.76 mm) .030 in (.76 mm) .030 in (.76 mm)

Recommended Engine Speed (No Load) (International Unit)

3400 RPM 2300 RPM

Idle Speed 1400 RPM 1400 RPM 1400 RPM

Charging System Output 15 amps 15 amps 15 amps

Head Bolt Torque

30 ft·lb (40.7 N·m)

30 ft·lb (40.7 N·m) 30 ft·lb (40.7 N·m)

Connecting Rod Torque 130 in·lb (17.3 N·m) 130 in·lb (17.3 N·m) 130 in·lb (17.3 N·m)

Flywheel Torque 49 ft·lb (66.4 N·m) 49 ft·lb (66.4 N·m) 49 ft·lb (66.4 N·m)

Engine Specifications (liquid-cooled)

Item 73545 (73546) 73550 (73551)

Manufacturer/Model Kawasaki/FD620D Daihatsu/582447 Diesel

Horsepower (kW) 20 HP (14.9 kW) 23 HP (17.1)

Oil Viscosity Over 40° F (5°C)

Below 40° F (5°C)

10W-30 or 10W-40 Above 0°F (-18°C)

5W-20 or 5W-30 Below 32° F (0° C)

10W-30 or 10W-40 Above 0°F (-18°C)

5W-30 Below 50° F (10°C)

Oil Capacity (With Filter) 1.9 U.S. Qts. (1.8l) 3.5 U.S. Qts. (3.3 l )

Coolant Capacity 4.1 Qts. 5 Qts.

Spark Plug (NGK # Shown) BMR4A N/A

Spark Plug Gap .024 -.028 in (0.6 - 0.7 mm) N/A

Recommended Engine Speed (International Units)

3400 RPM 2300 RPM

3400 RPM 2200 RPM

Idle Speed 1550 1850

Charging System Output 20 amps 40 amps

Head Bolt Torque 15 ft·lb (21 N·m) 25 ft·lb (34 N·m)

Connecting Rod Torque 15 ft·lb (21 N·m) 27 ft·lb (36 N·m)

Flywheel Torque 80 ft·lb (110 N·m) 35 ft·lb (47 N·m)

SPECIFICATIONS

1-6 5xi Series Tractor Service Manual

Service Schedule

Item Kohler, Manual

Steering

Kohler, Power Steering

Kawasaki Daihatsu

Grease Zerks

Front wheel spindles (2) Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Front axle pivot (1) Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Maintenance panel (3) Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Pulley box (2) Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Deck spindles (3) until

resistance is felt

Every 25 hrs. Every 25 hrs. Every 25 hrs. Every 25 hrs.

Deck idler & wheels (3) 60" Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. 60" deck gage wheels

grease

Every 25 hrs. Every 25 hrs. Every 25 hrs. Every 25 hrs.

Foot pedal shaft (1) Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Steering (1) one pump Every 50 hrs. N/A N/A N/A

Engine

Check oil level Every use Every use Every use Every use Oil change @ 5 hrs.

Every 100 hrs.

@ 5 hrs. Every 100 hrs.

Oil filter change Every 200 hrs. Every 200 hrs. Every 200 hrs. @ 50 hrs.

Every 200 hrs. Air filter Every 100 hrs. Every 100 hrs. Every 100 hrs. Every 100 hrs. Precleaner clean & oil Every 25 hrs. Every 25 hrs. Every 25 hrs. N/A Fuel filter Every 100 hrs. Every 100 hrs. Every 100 hrs. Every 400 hrs. Radiator level check N/A N/A Every use Every use Radiator screen clean N/A N/A Every use Every use Radiator flush N/A N/A Every 400 hrs. or

2 yrs.

Every 400 hrs. or

2 yrs. Change spark plugs Every 200 hrs. Every 200 hrs. Every 100 hrs. N/A Drain water from fuel filter N/A N/A N/A Every use Check fan belt N/A N/A Every 100 hrs. Every 100 hrs.

@ = initial service

NOTE: Service more frequently under dry/dirty/dusty conditions

MAINTENANCE TABLE

5xi Series Tractor Service Manual 1-7

Service Schedule (cont’d)

Item Kohler, Manual

Steering

Kohler, Power Steering

Kawasaki Daihatsu

Transaxle & Hydraulics

Oil level check 25 hrs. 25 hrs. 25 hrs. 25 hrs. Oil change Every 200 hrs. Every 200 hrs. Every 200 hrs. Every 200 hrs. Oil filter change @ 50 hrs.;

Every 200 hrs.

@ 50 hrs.; Every 200 hrs.

Clean power steering screen

N/A @ 50 hrs.;

Every 200 hrs.

@ 50 hrs.; Every 200 hrs.

Miscellaneous

Check PTO belt tension Every 50 hrs. Every 50 hrs. Every 50 hrs. Every 50 hrs. Check battery electrolyte Every 25 hrs. Every 25 hrs. Every 25 hrs. Every 25 hrs. Tire pressure Every 25 hrs. Every 25 hrs. Every 25 hrs. Every 25 hrs. Safety interlock Every use Every use Every use Every use Clean clippings from

deck

Every use Every use Every use Every use

Check under hood for grass build up

Every use Every use Every use Every use

Check service brake function

Every use Every use Every use Every use

Clean 3 air intake screens Every use Every use Every use Every use Clean rear transaxle cover Every use Every use Every use Every use

@ = initial service

MAINTENANCE TABLE

1-8 5xi Series Tractor Service Manual

QUICK REFERENCE SECTION

Safety Information ................................................

Specifications....................................................

Maintenance Table................................................

SERVICE SECTION

Chassis ......................................................

Hydrostatic Drive .................................................

Gasoline Engine..................................................

Diesel Engine ....................................................

Electrical........................................................

CHASSIS

5xi Series Tractor Service Manual 2-1

Table of Contents

MODEL/SERIAL NUMBER LOCATION ......................... 2-4

GREASING AND LUBRICATION

Service Interval/Specification.............................. 2-4

Lubrication Points ...................................... 2-4

REAR FENDERS, FOOTREST, & TUNNEL

General Information ..................................... 2-7

Removal .............................................. 2-7

Reassembly ........................................... 2-9

FRONT WHEEL TOE-IN

Specification/Service Interval............................. 2-10

Measurement ......................................... 2-10

Adjustment ........................................... 2-11

Spindle Adjustment .................................... 2-11

STEERING WHEEL

Remove Steering Wheel ................................ 2-12

Reassembly .......................................... 2-12

POWER STEERING

General Information .................................... 2-13

Maintenance.......................................... 2-13

SMART TURN STEERING

General Information .................................... 2-15

Theory of Operation .................................... 2-15

Inspection ............................................ 2-16

Adjustments .......................................... 2-16

CHASSIS

2-2 5xi Series Tractor Service Manual

MOTION CONTROL PEDAL

Adjustment ...........................................2-20

TIRE PRESSURE .........................................2-20

FUEL TANK SHUT-OFF VALVE ..............................

2-20

ELECTRIC PTO CLUTCH

General Information ....................................2-21

Break-In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 21

DRIVE SHAFT

General Information ....................................2-22

Inspection ............................................2-22

Assembly.............................................2-22

CHASSIS

5xi Series Tractor Service Manual 2-3

MODEL/SERIAL NUMBER LOCATION

The tractor model and serial number plate location is shown in the illustration.

The engine has its own model and serial number identification. Consult the appropriate engine manufacturer’s service literature for the location and translation of the engine model and serial number information.

GREASING AND LUBRICATION

Service Interval/Specification

The machine should be greased every 50 hours or yearly, whichever occurs first. You should grease more frequently when operating conditions are extremely dusty or sandy. See the maintenance table in section 1c.

Grease Type: General-purpose lithium base grease

Lubrication Points

There are 3 grease zerks on the front axle; one on at each spindle and one at the center pivot.

2.0757.015

2.0109.043

2.0109.033

CHASSIS

2-4 5xi Series Tractor Service Manual

Remove the maintenance panel located in the tunnel in front of the seat.

This will allow access to the 3 zerk fittings below.

The pulley box for the mower deck contains 2 zerk fittings; one at each pulley pivot.

2.0109.026

2.0144.023

2.0109.024

CHASSIS

5xi Series Tractor Service Manual 2-5

GREASING AND LUBRICATION (cont’d)

There are 3 zerk fittings located on the mower deck spindles. Apply grease until resistance is felt from the grease gun handle (2-3 pumps).

Also lubricate the mower deck idler arm on decks so equipped.

The 60" deck has zerk fittings on the gage wheels, grease every 25 hours of operation.

There is 1 zerk fitting located on the foot pedal shaft which requires greasing.

Models with manual steering have a lubrication point on the steering gear. Do not force excessive amounts of grease into this fitting (one pump of the grease gun handle only).

2.0144.069

2.0415.012

2.0415.001

CHASSIS

2-6 5xi Series Tractor Service Manual

REAR FENDERS, FOOTRESTS, & TUNNEL

General Information

The seat, rear fenders, footrests, and tunnel can be removed as a unit providing easy access to chassis components.

Removal

1. Disconnect the electrical connections for the seat switch, cruise control, and taillights (as applicable) from the wiring harness.

NOTE: The cruise control and taillights share the same connector, which is located under the right fender.

2. Remove the brake and motion control pedals.

2.0109.039

2.0109.003

2.0109.021

2.0109.020

CHASSIS

5xi Series Tractor Service Manual 2-7

REAR FENDERS, FOOTRESTS, & TUNNEL (cont’d)

3. Remove the four bolts securing the fenders to the frame (two on each side of the seat).

4. Remove the nuts from the front footrest supports and the clamps from the rear supports.

5. Remove the three air intake screens.

2.0109.015

2.0109.019

2.0109.004

CHASSIS

2-8 5xi Series Tractor Service Manual

6. Remove the knob for the transaxle range selector.

7. With the help of an assistant, lift the rear of the fender assembly until it clears the transaxle shift lever. Then remove the assembly to the rear of the tractor.

Reassembly

Reverse steps 1-7 to reassemble the seat, rear fenders, footrests, and tunnel.

NOTE: Failure to keep all hoses in place on the top of the fuel tank could result in improper operation of the fuel vent or supply system.

NOTE: Do not pinch any wiring between the fender assembly and the top edges of the frame.

2.0109.017

2.0109.039

2.0109.014

CHASSIS

5xi Series Tractor Service Manual 2-9

FRONT WHEEL TOE-IN

Specification/Service Interval

If there is uneven tire wear, lawn scuffing, or hard steering, toe-in may need to be adjusted. Toe-in should be 1/8" - 1/4" (3 to 6 mm) on the front wheels. This should be checked every 100 hours or once a year, whichever occurs first.

Measurement

1. Disengage the PTO, set the parking brake, and turn the ignition key to OFF to stop the engine. Remove the key.

2. Turn wheels straight ahead. Square the lower steering plate to the center line of the frame rails by aligning a straight edge (A) with the footrest support (B) as shown.

3. Push the front of the tires out to remove normal looseness in the linkage.

4. Measure the distance between both front tires at spindle level (at the front and rear of the wheels).

5. The front measurement should be 1/8" to 1/4" (3 to 6 mm) less than the rear measurement.

If adjustment is needed, follow the steps outlined on the next page.

Note: The black steering tie rod end goes to the front and has right hand threads.

2.0109.043

2.0109.035

2.0144.050

CHASSIS

2-10 5xi Series Tractor Service Manual

Adjustment

1. Loosen the jam nuts at the ends of the steering rods.

2. Rotate both steering rods equal amounts to adjust the toe-in to 1/8" to 1/4" (3 to 6 mm) .

3. Recheck the toe-in as described earlier.

IMPORTANT: Make sure that the flat surface on the top of the front tie rod ends are parallel to the bottom of the steering arms (inset).

Spindle Alignment

When installing the spindle to the steering arm, you must align the wheel so that it is parallel to the steering arm as shown.

2.0109.047

2.0109.046

2.0109.048

CHASSIS

5xi Series Tractor Service Manual 2-11

STEERING WHEEL

Remove Steering Wheel

1. Remove plastic trim cover.

2. Loosen the nut securing the wheel.

3. Install puller as shown. Tighten forcing screw to remove steering wheel.

NOTE: Install large flat washers on puller bolts to protect steering wheel.

Reassembly

1. Place the steering wheel on the shaft, carefully aligning the splines.

NOTE: On manual steering models, be sure to align steering wheel in the “straight ahead” position. There is

no fixed “straight ahead”

position on power steering models.

2. Torque the retaining nut to 45 - 50 ft·lbs.

3. Replace the trim cover.

2.0144.051

2.0144.052

2.0144.053

CHASSIS

2-12 5xi Series Tractor Service Manual

POWER STEERING

General Information

The 22 HP, 20 HP liquid-cooled and 23 HP diesel tractors are equipped with power steering.

This system routes pressurized hydraulic fluid supplied by the hydrostatic transmission to a directional valve located at the base of the steering column. When the steering wheel is turned, this valve directs pressure to a double acting hydraulic cylinder, causing the steering plate to pivot as the cylinder extends or contracts. Tie rods attached to the steering plate turn the front spindles.

When the tractor is not running, some oil will drain from the power steering system. When this happens, it will be necessary to purge the air from the system. This is done by turning the steering wheel with the engine running until the wheels turn fully and smoothly in both directions.

Maintenance

The power steering system is equipped with an in-line filter screen. It should be cleaned after initial 50 hours, then every 200 hours, or if the power steering gets noisy.

To clean the power steering screen:

1. Remove the left and center air intake screens.

2. Remove the screen housing from the clamp securing it to the left-hand side of steering tower.

.3. Remove the top hose first to prevent oil from

back-flushing the screen.

4. Remove the hydraulic lines, and seal the ends to keep out dirt.

3.7195.029

2.0144.16

2.0109.044

CHASSIS

5xi Series Tractor Service Manual 2-13

POWER STEERING (cont’d)

3. Disassemble the housing, and clean the screen with solvent.

4. Inspect the “O” rings that seal the lines and housing. Replace them if there are any signs of cuts or deterioration, (i.e. hardening or swelling of the rubber).

Lubricate the “O” rings before reassembly.

5. Reassemble the housing, replace the lines, and secure to steering tower.

6. Bleed air from the system by turning the steering wheel from stop to stop several times.

7. Check the hydrostatic transmission fluid level.

2.0144.076

2.0144.16

2.0144.086

CHASSIS

2-14 5xi Series Tractor Service Manual

SMART TURN™ STEERING

General Information

The Smart Turn Steering™ feature automatically lowers the speed of the tractor in tight turns. The decrease in speed is directly proportional to the sharpness of the turn, up to a maximum speed reduction of approximately 40% .

The Smart Turn Steering feature permits sharp turns to be made without always having to change speed control position. The original speed is restored as the turn is completed.

Theory of Operation

The steering plate (A) is attached to the speed control lever (B) on the hydrostatic transmission through a system of linkage and levers.

When the steering wheel is turned, the linkage pushes the speed control lever (A) on the hydrostatic transmission towards the neutral position and slows the tractor.

2.3653.005

2.0144.63

2.0144.059

CHASSIS

5xi Series Tractor Service Manual 2-15

SMART TURN™ STEERING (cont’d)

Inspection

The Smart Turn Steering system was set-up at the factory and should not need any adjustment. Adjustment must be verified if the transaxle is removed and reinstalled.

Correct adjustment can be verified by checking the position of the bushing (A) in the slot of the brake pivot plate (B). The bushing should not contact either side of the slot.

Correct adjustment can be verified by removing the maintenance panel and visually checking the position of bushing (A). It should be centered in the slot in the brake pivot (B). The bushing should not contact either side of the slot when the brake is applied.

Adjustments

IMPORTANT: The adjustment procedure must

be performed in the sequence given.

If adjustment of the system is necessary:

1. Remove the rear fenders and tunnel from the tractor as outlined on page 2-7.

NOTE: It is important that the toe-in is properly adjusted before adjusting the Smart Turn Steering linkage. Verify setting by following the procedure starting on page 2-10.

2.0144.059

2.0109.014

2.0144.066

CHASSIS

2-16 5xi Series Tractor Service Manual

+ 65 hidden pages

Toro 520XI, 5xi Series, 518xi, 522xi, 520Lxi Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual