MTD 500 Series Shop Manual

Professional Shop Manual

Medium Frame 2 & 3 Stage Snow Throwers

(500, 600 and 700 series)

2005 to present

MTD Products Inc. - Product Training and Education Department

NOTE: These materials are for use by trained technicians who are experienced in the service and repair of outdoor power

equipment of the kind described in this publication, and are not intended for use by untrained or inexperienced individuals.

These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperi-

enced individuals should seek the assistance of an experienced and trained professional. Read, understand, and follow all

instructions and use common sense when working on power equipment. This includes the contents of the product’s Oper-

ators Manual, supplied with the equipment. No liability can be accepted for any inaccuracies or omission in this publication,

although care has been taken to make it as complete and accurate as possible at the time of publication. However, due to

the variety of outdoor power equipment and continuing product changes that occur over time, updates will be made to these

instructions from time to time. Therefore, it may be necessary to obtain the latest materials before servicing or repairing a

product. The company reserves the right to make changes at any time to this publication without prior notice and without

incurring an obligation to make such changes to previously published versions. Instructions, photographs and illustrations

used in this publication are for reference use only and may not depict actual model and component parts.

I

Chapter 1: Introduction

Professional Service Manual Intent .......................................................................1

Safety ....................................................................................................................1

Fasteners .............................................................................................................. 3

Assembly Instructions ........................................................................................... 3

Identifying Snow Thrower Series........................................................................... 3

Understanding Model And Serial Numbers ...........................................................4

Chapter 2: Belts And Cables

Auger Belt .............................................................................................................7

Drive Belt .............................................................................................................10

Auger Control Cable ...........................................................................................11

Drive Clutch Control Cable ..................................................................................13

Auger and Drive Cable Adjustments (500, 600 and 3-wheel Track Drives) ........14

Auger Cable Adjustments (2-wheel Track Drives) ..............................................15

Speed Selector Cable .........................................................................................16

Speed Selector Rod ............................................................................................18

Auger and Drive Lever Interlock.......................................................................... 20

Chapter 3: 500 Series Drive System

Axle Assemblies ..................................................................................................23

Hex Drive Shaft ...................................................................................................26

Planetary Gears................................................................................................... 27

Friction Wheel Replacement............................................................................... 29

Chapter 4: 600 Series Drive System

Axle Assemblies ..................................................................................................31

Hex Drive Shaft Assembly ...................................................................................33

Friction Wheel Replacement............................................................................... 35

Chapter 5: 700 Series 2-Wheel Track-Drive System

Track Adjustment ................................................................................................37

Track and Track Wheels ..................................................................................... 38

Hex Drive Shaft ...................................................................................................39

Friction Wheel Replacement............................................................................... 43

Axle Shaft ............................................................................................................44

Planetary Gears and Shaft ..................................................................................46

Steering Trigger Cables ...................................................................................... 51

Table of Contents

II

Chapter 6: 700 Series 3-Wheel Track-Drive System

Track Removal/replacement ............................................................................... 53

Track Drive Assembly ......................................................................................... 58

Drive Axle Assemblies .........................................................................................59

Hex Drive Shaft and Planetary Gears................................................................. 60

Friction Wheel Replacement ...............................................................................63

Idler Hold Down Tools .........................................................................................64

Chapter 7: Auger Housing and Gear Box

Skid Shoes.......................................................................................................... 67

Skid Shoe Adjustment......................................................................................... 67

Shave Plate .........................................................................................................68

Auger Housings ...................................................................................................69

Auger Assemblies ............................................................................................... 71

2-Stage Gear Boxes ............................................................................................74

3-Stage Gear Boxes ............................................................................................78

Chapter 8: Discharge Chute and Controls (Manual Crank)

Remote Pitch Control Head (Plastic Chutes) ......................................................83

Remote Pitch Control Head (Steel Chutes)......................................................... 86

Discharge Chute (Manual Crank, Cork Screw Style).......................................... 89

Discharge Chute (with Remote Head)................................................................. 90

Manual Crank, Cork Screw Style ........................................................................ 92

Chute Bracket Adjustment ..................................................................................92

Remote Head ......................................................................................................93

Chapter 9: Discharge Chute and Controls (Joystick, Cable Style)

Remote Pitch Control Head (Plastic Chutes)...................................................... 97

Discharge Chute (with Remote Head) ...............................................................100

Joystick (Cable Style) ........................................................................................102

Chapter 10: Discharge Chute and Controls (Joystick, Hex Shaft)

Remote Pitch Control Head (Plastic Chutes).................................................... 105

Remote Head (Joystick, Hex Shaft) ..................................................................108

Joystick (Hex Shaft) ..........................................................................................114

Chapter 11: Discharge Chute and Controls (Electric)

Remote Pitch Control Head (Plastic Chutes) ....................................................119

Remote Pitch Control Head (Steel Chutes) .......................................................122

Discharge Chute ...............................................................................................125

Electric Chute Control .......................................................................................130

Electric Joystick and Harness ........................................................................... 131

Electric Joystick Bracket ....................................................................................132

Chute Control Assembly ....................................................................................136

Chute Control Motors

........................................................................................137

Electric Chute Control Pitch Cables ..................................................................140

Schematics ........................................................................................................143

Introduction

1

Professional Service Manual Intent

This Manual is intended to provide service dealers with an introduction to the mechanical aspects of medium

frame two and three stage snow throwers.

NOTE: Please refer to the engine’s service manual for all maintenance and repair procedures.

Disclaimer: The information contained in this manual is correct at the time of writing. Both the product and the infor-

mation about the product are subject to change without notice.

About the text format:

NOTE: is used to point out information that is relevant to the procedure, but does not fit as a step in the proce-

dure.

• Bullet points: indicate sub-steps or points.

1. Numbered steps

indicate specific things that should be done, and the order in which they should be done.

1a. Substeps

will be lettered and nested within steps. Two or more substeps may be combined to describe

the actions required to complete a step.

Disclaimer: This manual is intended for use by trained, professional technicians.

• Common sense in operation and safety is assumed.

• In no event shall MTD or Cub Cadet be liable for poor text interpretation or poor execution of the proce-

dures described in the text.

• If the person using this manual is uncomfortable with any procedures they encounter, they should seek

the help of a qualified technician or Cub Cadet Technical Support.

Safety

This Service Manual is meant to be used along with the Operator’s Manual. Read the Operator’s Manual and

familiarize yourself with the safety and operational instructions for the equipment being worked on. Keep a copy of

the Operator’s Manual for quick reference. Operator’s manuals may be viewed for free at the Cub Cadet website. It

will be necessary to have the complete model and serial number for the equipment.

Caution is used to point out potential danger to the technician, operator, bystanders, or sur-

rounding property.

! CAUTION! CAUTION

Warning indicates a potentially hazardous situation that, if not avoided, could result in death

or serious injury.

! WARNING! WARNING

! DANGER! DANGER

Danger indicates an imminently hazardous situation that, if not avoided, will result in death or

serious injury. This signal word is to be limited to the most extreme situations

CHAPTER 1: INTRODUCTION

Medium Frame 2 & 3 Stage Snow Throwers

2

• Be prepared in case of emergency:

Keep a fire extinguisher nearby

Keep a first aid kit nearby

Keep emergency contact numbers handy

• Replace any missing or damaged safety labels on shop equipment.

• Replace any missing or damaged safety labels on equipment being serviced.

! CAUTION! CAUTION

• Grooming and attire:

Do not wear loose fitting clothing that may become entangled in equipment.

Long hair should be secured to prevent entanglement in equipment.

Jewelry is best removed.

• Protective gear: includes, but is not limited to

Clear eye protection ................................ while working around any machinery

Protective gloves..................................... where necessary

Armored footwear.................................... when working around any machinery

Hearing protection................................... in noisy environments

Chemically resistant gloves..................... when working with chemicals or solvents

Respirator................................................ when working with chemical or solvents

Appropriate tinted eye protection............. when cutting or welding

Flame resistant headgear, jacket, chaps. when cutting or welding

! WARNING! WARNING

! CAUTION! CAUTION

• Remember that some hazards have a cumulative effect. A single exposure may

cause little or no harm, but continual or repeated exposure may cause very serious

harm.

• Clean spills and fix obviously dangerous conditions as soon as they are noticed.

• Lift and support heavy objects safely and securely.

• Be aware of your surroundings and potential hazards that are inherent to all power

equipment. All the labels in the world cannot protect a technician from an instant of

carelessness.

Introduction

3

Fasteners

• Most of the fasteners used on these snow throwers have SAE thread sizes.The engines have metric

thread sizes. For this reason, wrench sizes are frequently identified in the text, and measurements are

given in U.S. and metric scales.

• If a fastener has a locking feature that has worn, replace the fastener or apply a small amount of releas-

able thread locking compound such as Loctite® 242 (blue).

• Some fasteners, like cotter pins, are single-use items that are not to be reused. Other fasteners such as

lock washers, retaining rings, and internal cotter pins (hairpin clips) may be reused if they do not show

signs of wear or damage. This manual leaves that decision to the judgement of the technician.

Assembly Instructions

• Torque specifications may be noted in the part of the text that covers assembly. They may be summa-

rized in tables along with special instructions regarding locking or lubrication. Whichever method is more

appropriate will be used. In many cases, both will be used so that the manual is handy as a quick-refer-

ence guide as well as a step-by-step procedure guide that does not require the user to hunt for informa-

tion.

• Lubricant quantity and specification may be noted in the part of the text that covers maintenance, and

again in the section that covers assembly. They may also be summarized in tables along with special

instructions. Whichever method is more appropriate will be used. In many cases, the information will be

found in several places in the manual so that the manual is handy as a quick-reference guide as well as a

step-by-step procedure guide that does not require the user to hunt for information.

• The level of assembly instructions provided will be determined by the complexity of reassembly, and by

the potential for damage or unsafe conditions to arise from mistakes made in assembly.

• Some instructions may refer to other parts of the manual for subsidiary procedures. This avoids repeating

the same procedure two or three times in the manual.

Identifying Snow Thrower Series

NOTE: Medium frame two stage snow throwers are available as a 500, 600 or 700 series.

The 500 series features:

• Steerable drive wheels

• Auger housing width of 22” - 30”

• 2 stage and 3 stage augers available.

Figure 1.1

500 Series

Medium Frame 2 & 3 Stage Snow Throwers

4

The 600 series features:

• Solid drive wheel axles

• Auger housing width of 22” - 30”

• 2 stage augers

The 700 series features:

• Track drive (2 and 3 wheel versions)

• Auger housing width of 24” - 30”

• 2 stage and 3 stage augers available.

Understanding Model And Serial Numbers

The model and serial numbers are located on a white

sticker with a bar code. The sticker is located at the back of

the machine, below and to the left of the speed selector

shaft.

Figure 1.2

600 Series

Figure 1.3

700 Series

Figure 1.4

Introduction

5

The model number is 31AH64FG795. The break down of what the model number

means is as follows:

• 31 - - - - - - - - - - - - - - - - - - - - - - - - Indicates that this is a snow thrower.

• - - A- - - - - - - - - - - - - - - - - - - - - - - - Sales level

• - - - H- - - - - - - - - - - - - - - - - - - - - - - Starter (M = 110v electric starter with a 3A/5A split alternator)

• - - - - - 6 - - - - - - - - - - - - - - - - - - - - - Frame series

• - - - - - - 4 - - - - - - - - - - - - - - - - - - - - Engine (T = 277 cc Cub Cadet engine)

• - - - - - - - F- - - - - - - - - - - - - - - - - - - Handle panel style

• - - - - - - - - -G - - - - - - - - - - - - - - - - - Auger housing

• - - - - - - - - - - 795 - - - - - - - - - - - - - - Customer number

The serial number is 1H072B30186. The serial number

reads as follows:

• 1 - - - - - - - - - - - - - - - - - -Engineering level

• - H - - - - - - - - - - - - - - - - -Month of production (H = August)

• - - - 07- - - - - - - - - - - - - - - -Day of the month

• - - - - - 2 - - - - - - - - - - - - - - -Last digit of the year

• - - - - - - B - - - - - - - - - - - - - -Plant it was built in

• - - - - - - - - 3 - - - - - - - - - - - - -Assembly line number

• - - - - - - - - - -0186 - - - - - - - - - -Number of unit built

Additional technical and service information may also be available to our company authorized service center per-

sonnel through our company corporate offices, regional parts distributors and regional service center field support

personnel. Please contact the designated support office in your area or our corporate offices directly should further

service information be needed.

Cub Cadet LLC

P.O. Box 368022

Cleveland, OH 44136

Telephone: (330) 273-8669

www.cubcadet.com

Medium Frame 2 & 3 Stage Snow Throwers

6

Belts and Cables

7

Auger Belt

To remove/replace the Auger Belt:

NOTE: Prior to servicing or replacing any belts stop the

engine and allow it to cool. Then disconnect spark

plug and ground it to the engine

NOTE: If the unit is throwing the Auger Belt, inspect the

round part of the Auger Housing that the impeller

spins in. If there is a buckle or a crease in it, the

Auger Housing is bent and must be replaced

before replacing the belt.

1. Remove the two screws that secure the belt cover

using a 3/8” wrench. See Figure 2.1.

2. Lift the belt cover off of the unit.

NOTE: Some units have a belt guide. The belt guide can

be removed by removing the two screws, by the

arrows in Figure 2.2., using a 1/2” wrench.

Figure 2.1

3/8”

Hex Screws

Figure 2.2

Chapter 2: Belts And Cables

Medium Frame 2 & 3 Stage Snow Throwers

8

3. Loosen the idler pulley enough for the belt to clear it

using a 1/2” wrench.

4. Slip the belt off of the engine pulley.

5. Drain the fuel into an approved container.

6. Carefully tip the snow thrower forward so it rests on

the auger housing.

7. Remove the bottom access panel. See Figure 2.4.

8. Remove the belt guide (the shoulder bolt) with a 3/

4” wrench and a 9/16” wrench. See Figure 2.5.

9. Unhook the idler bracket return spring.

Figure 2.3

Figure 2.4

3/8” wrench

Figure 2.5

Return Spring

Belts and Cables

9

NOTE: On 2005 through 2007 model years, the Return

Spring hooked into a hole in the impeller housing.

See Figure 2.6.

NOTE: The idler bracket has a tab that acts as a brake,

pressing against the Auger Belt whenever the

Auger Control Lever is released.

10. Pull the belt down past the Auger Pulley. See Figure

2.7.

11. Install the belt by following the previous steps in

reverse order.

12. Start the engine.

13. Engage and disengage the Auger Control Lever a

few times.

14. With the Auger Control Lever disengaged, move to

the front of the unit and verify that the augers are not

moving.

NOTE: If the Augers are moving, adjust the cable tension

and repeat steps 12 through 14.

15. Test run the snow thrower in a safe area before

returning it to service.

Figure 2.6

Return

Spring

Figure 2.7

Medium Frame 2 & 3 Stage Snow Throwers

10

Drive Belt

To remove/replace the drive belt:

NOTE: Prior to servicing or replacing any belts, stop

the engine and allow it to cool. Then discon-

nect spark plug and ground it to the engine

1. Remove Auger Belt as described on the Auger Belt

section of this chapter.

2. Using a 3/8” wrench, rotate the Drive Idler Bracket

enough slip the belt off of the engine pulley. See

Figure 2.8.

3. Work the belt off the bottom of the Drive Platter.

4. Slip the belt between the Friction Wheel and Drive

Platter. See Figure 2.9.

5. Pull the belt up through the top of the housing.

6. Install the belt by following the previous steps in

reverse order.

7. Test run the snow thrower in a safe area before

returning it to service.

Figure 2.8

Drive

Idler Bracket

Torsion

Spring

Figure 2.9

Drive Platter

Belts and Cables

11

Auger Control Cable

To remove/replace the Auger Control Cable:

NOTE: The auger control is on the left side of the handle

bars.

1. Place an alignment mark on the adjustment bracket

and the frame. See Figure 2.10.

2. Loosen the hex screws securing the adjustment

bracket to release tension off of the cable.

3. Detach the cable from the control handles. See Fig-

ure 2.11.

NOTE: On units with threaded Z-fittings:

• Loosen the jam nut.

• Unthread the cable from the Z-fitting.

4. Loosen the cable guide pulley on the adjustment

bracket and slip the cable out of the pulley groove.

5. Remove the belt cover.

6. Loosen the second cable guide pulley and slip the

cable out of the pulley groove. See Figure 2.12.

Figure 2.10

Alignment mark

Figure 2.11

Figure 2.12

Medium Frame 2 & 3 Stage Snow Throwers

12

7. Detach the spring end of the cable from the Idler

Pulley Bracket. See Figure 2.13.

8. Install the cable by following the previous steps in

reverse order.

NOTE: When attaching he spring end of the cable,

the open side of the spring faces the engine.

9. Test run the snow thrower in a safe area before

returning it to service.

Figure 2.13

Idler Pulley Bracket

Auger Cable

Belts and Cables

13

Drive Clutch Control Cable

To remove/replace the Drive Control Cable:

NOTE: The drive control is on the right handle.

1. Stop the engine and allow it to cool. Disconnect the

spark plug wire and ground it to the engine.

2. Drain the fuel into an approved container.

3. Carefully tip the snow thrower forward so it rests on

the auger housing opening.

4. Place an alignment mark on the adjustment bracket

and

the frame. See Figure 2.14.

5. Detach the cable from the engagement handle.

NOTE: On units with threaded Z-fittings:

• Loosen the jam nut.

• Unthread the cable from the Z-fitting.

6. Remove the bottom access panel.

7. Unhook the spring end of the cable from the Drive

Platter Support Bracket. See Figure 2.15.

8. Unhook the cable from the pulley on the adjustment

bracket.

9. Install the cable by following the previous steps in

reverse order.

10. Test run the snow thrower in a safe area before

returning it to service.

Figure 2.14

alignment mark

Figure 2.15

Drive platter support bracket

Medium Frame 2 & 3 Stage Snow Throwers

14

Auger and Drive Cable Adjustments (500, 600 and 3-wheel Track Drives)

NOTE: Prior to servicing or replacing any belts, stop

the engine and allow it to cool. Then discon-

nect spark plug and ground it to the engine

1. Loosen the hex screws that secure the bracket that

guides the cable needing adjustment using a 3/8”

wrench. See Figure 2.16.

2. Slide the bracket up to add slack to the cable or

down to add tension to the cable.

NOTE: The cables should be straight, without ten-

sion when the handle is not engaged.

NOTE: If either bracket reaches the end of its travel

without achieving correct adjustment, use a

straight-edge to confirm that the handle bars

are not bent.

3. When adjusted correctly, the cables should not have

any slack. They should also not be under tension

while in the disengaged position.

NOTE: The speed selector should be able the travel

through its full range of travel without bind-

ing.

IMPORTANT: Creep in the drive or auger systems

is unacceptable and must be fixed

before returning to service.

4. Test run the unit in a safe area before returning it to

service.

Figure 2.16

Hex Screws

Adjustment

Brackets

Belts and Cables

15

Auger Cable Adjustments (2-wheel Track Drives)

Check the adjustment of the auger control:

1. When the Auger Control Lever is released, in the

disengaged or “up” position, the cable should have

very little slack. It should not be tight.

2. In a well-ventilated area, start the snow thrower

engine.

3. While standing in the operator’s position, behind the

snow thrower, engage the auger.

4. Allow the auger to remain engaged for approxi-

mately ten seconds before releasing the auger con-

trol. Repeat this several times.

5. With the throttle control in the FAST (rabbit) position

and the auger control in the disengaged or “up”

position, walk to the front of the machine.

6. Confirm that the auger has completely stopped

rotating and shows no signs of motion.

IMPORTANT: If the auger shows any signs of rotating, return to the operator’s position and shut off the engine

and wait for all moving parts to stop before readjusting the auger control.

To adjust the Auger Control Cable:

1. Loosen the hex jam nut on the Auger Control Cable “Z” fitting. See Figure 2.17.

2. Without turning the cable, thread the ferrule up or down the “Z” fitting until there is no slack in the cable with-

out pulling on the auger idler pulley..

• Hold the flats on the ferrule with pliers and tighten the jam nut against the ferrule.

• Do not over-tighten the cable.

3. Repeat steps 2 through 6 above until proper adjustment has been achieved.

Drive Cable Adjustments (2-wheel Track Drives)

Check the adjustment of the drive control by:

1. With the Drive Control Lever released, in the disengaged or “up” position, push the snow thrower gently for-

ward. The unit should roll freely.

2. Engage the drive control and gently attempt to push the snow thrower forward. The tracks should not turn and

the unit should not roll freely.

3. Release the drive control and move the shift lever back and forth between the R2 position and the F6 position

several times. The shift lever should move easily.

If any of the above tests failed, the drive cable is in need of adjustment. Proceed as follows:

1. To adjust the drive, loosen the hex jam nut on the auger control cable “Z” fitting. See Figure 2.17.

2. Thread the ferrule without turning the cable onto the “Z” fitting until there is no slack in the cable.

• Hold the flats on the ferrule with pliers and tighten the jam nut against the ferrule.

• Do not over-tighten the cable.

3. Rotate the coupling end of the cable counterclockwise to loosen the tension or clockwise to increase the ten-

sion on the cable.

4. Tighten the hex jam nut.

5. Re-check the adjustment of the Drive Control Cable, as described above, to verify proper adjustment has been

achieved.

Figure 2.17

Medium Frame 2 & 3 Stage Snow Throwers

16

Speed Selector Cable

To adjust the Speed Selector Cable:

NOTE: Inspect the drive platter and friction wheel

before adjusting the speed sector cable.

Ensure that the friction wheel can freely

travel through the whole range of positions.

NOTE: A damaged or binding friction wheel can

mimic a speed selector cable that is out of

adjustment.

1. Place the shift lever in the fastest forward speed

position.

2. Loosen the hex nut on the Shift Cable Index Bracket

and pivot the bracket downward until the slack in the

cable is gone. See Figure 2.18.

3. Tighten the hex nut.

To remove/replace the Speed Selector Cable:

1. Stop the engine and allow it to cool. Disconnect the

spark plug wire and ground it to the engine.

2. Drain the fuel into an approved container.

3. Carefully tip the snow thrower forward so it rests on

the auger housing opening.

4. Remove the bottom access panel.

5. Place a block of wood on the left side of the drive

wheel to hold the shifter arm stationary. See Figure

2.19.

6. Release the tension on the Speed Selector Cable

with two 7/16” wrenches. See Figure 2.20.

NOTE: Older production units only have one hole

for the speed selector cable, as seen in Fig-

ure 2.20. Current production models have

three holes. The extra holes were added to

expand the adjustment range to the cable.

Figure 2.18

Figure 2.19

Figure 2.20

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