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Cub Cadet 12AE764N709 Shop Manual

33" wide area mower
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Professional Shop Manual
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.
MTD Products Inc. - Product Training and Education Department
33" Wide Area Mower
© Copyright 2007 MTD Products Inc. All Rights Reserved
FORM NUMBER - 769-03596
10/2007

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Summary of Contents for Cub Cadet 12AE764N709

  • Page 1 Professional Shop Manual 33” Wide Area Mower 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.

  • Page 3: Table Of Contents

    Table of Contents Chapter 1: Introduction ................... 1 Description of the Mower..................1 Fasteners ......................1 Assembly ......................2 Model and Serial Numbers ................... 2 Chapter 2: Maintenance ..................3 Cleaning ....................... 3 Lubricants ......................3 Axle shafts ......................3 Front casters......................

  • Page 4: Chapter 1: Introduction

    • Common sense in operation and safety is assumed. • In no event shall MTD or Cub Cadet be liable for for poor text interpretation, or poor execution of the procedures described in the text. • If the person using this handbook is uncomfort- able with any procedures they encounter, they should seek the help of a qualified technician.

  • Page 5: Assembly

    Some instructions may refer to other parts of the man- ual for subsidiary procedures. This avoids repeating the same procedure two or three times in the manual. Figure 1.2 The model number is 12AE764N709. The model number breaks down as follows: 12......self propelled ...A.......sales level ..E....type of starter (e = electric)

  • Page 6: Chapter 2: Maintenance

    MAINTENANCE CHAPTER 2: MAINTENANCE Cleaning Axle shafts Maintaining any piece of equipment begins with keep- The rear axle shaft coming from the transmission is a ing it clean. Any spills such as fuel or oil should be double-D shaft. As required of all double-D axle shafts, wiped off promptly.

  • Page 7: Front Casters

    MAINTENANCE Front casters Spindles The front caster wheels of the mower are equipped Both blade spindles are equipped with grease fittings. with two grease fittings. Any grease injected into one The spindles should be greased every 50 hours or at side of the wheel will migrate to the other side.

  • Page 8: Fasteners

    MAINTENANCE Fasteners Emissions Check all fasteners annually for any signs of loosening In order to meet the new EPA regulations, there has or damage. been some changes to the fuel system. The fuel tank is blow moulded and composed of a high density poly- Excessive vIbration is a primary cause of fatigue fail- mer.

  • Page 9: Chapter 3: Drive System

    Drive system CHAPTER 3: DRIVE SYSTEM A single belt is used to transfer power from the engine Remove the belt guide that is near the idler pul- crankshaft to the input shaft of the transaxle. The left using pair 7/16” wrenches.

  • Page 10: Drive Belt

    Drive system Slip the belt past the belt guide and work the belt Drive Cable off of the remaining pulleys. A cable is used to pull the idler pulley to engage the IMPORTANT: Before installing a new belt, it transmission driving the wheels. This puts tension on must be turned inside out to route the belt prop- the drive belt allowing it to turn the transmission pulley.

  • Page 11: Drive Cable

    Drive system Remove the deck by following the steps Brakes described in Chapter 4: Deck and lift shaft. The brake is released by squeezing either or both Unhook the drive cable from the idler bracket. levers. The handle on the left hand side will release the See Figure 3.7.

  • Page 12: Brake Adjustment

    Drive system The two cable design allows the operator to mow with- Brake adjustment out engaging the traction (wheel) drive. This is a handy Raise the rear of the mower at least 18” off the feature for mowing in tight areas where maneuverabil- ground.

  • Page 13: Brake Caliper

    Drive system If the brake needs to be adjusted, tighten or Brake caliper loosen the adjustment nut with a 1/2” wrench, Raise the rear of the mower at least 18” off the See Figure 3.13. ground. NOTE: If the brake is set too tight the mower will Safely support mower with jack stands.
  • Page 14 Drive system Remove caliper mounting bolts. Inspect the brake yoke for signs of corrosion that See Figure 3.16. may prevent proper movement of pins through the yoke. See Figure 3.18. Actuator Pins Adjustment Screw Brake Yoke Front Brake Brake Pad Plate Figure 3.16 Figure 3.18...
  • Page 15 Drive system Brake cables The cable will now be loose enough to slip the z- fitting from the handle. See Figure 3.21. To replace the cables: NOTE: These cables are not adjustable. Deck engagement cable Loosen the lock nuts located on the cable brack- ets and slide it up the cable.
  • Page 16 Drive system Loosen the connecting nut of the loop link cou- Pull each cable out and down to free the cable pler with a 3/8” wrench to free the eyelets on the from the frame. The cables can be pulled 1 at a brake cable.

  • Page 17: Transmission Removal And Replacement

    Drive system Transmission Removal and replacement Detach the lower shift rod from the upper shift using pair 1/2” wrenches. Loosen wheel bolts using a 1/2” wrench. See Figure 3.28. LIft and safely support mower so that the wheels are at least 18” off the ground. Remove both rear wheels .
  • Page 18 Drive system Remove the hairpin clip that fastens the spring Lower the transmission and tilt it forward to tension rod to the transmission. See Figure 3.30. guide it out from under the frame. When the transmission is out of the mower remove the lower shift rod, spring retention rod, and extension spring.

  • Page 19: Chapter 4: Cutting Deck And Lift Shaft

    CUTTING DECK AND LIFT SHAFT CHAPTER 4: CUTTING DECK AND LIFT SHAFT Deck removal Remove the four hairpin clips in the deck lift links and slide the deck to the left to clear the hanging Take the deck cover off by removing the three pins on the lift links.

  • Page 20: Cleaning The Deck

    CUTTING DECK AND LIFT SHAFT Cleaning the deck Blades Clean debris off of the deck every time the deck cover The condition of the blades will greatly effect the quality is removed. It is routine maintenance that will make the of the cut.

  • Page 21: Blade Removal

    CUTTING DECK AND LIFT SHAFT Blade removal Install the blade by following the above steps in reverse order. Tighten the blade nut to a torque Remove the deck as described in the previous of 70 - 90 ft-lbs ( 95 - 122 Nm). section of this chapter or lift the tractor using a professional grade lift.

  • Page 22: Spindles

    CUTTING DECK AND LIFT SHAFT Spindles To replace a spindle: The spindles are a complete unit. The only replaceable Remove the deck as described at the beginning parts are the pulleys. The spindles are equipped with a of this chapter. grease fitting that should get one squirt of grease after Remove the blade following the steps described every use of the deck wash system or every 10 hours...
  • Page 23 CAUTION: Cub Cadet belts are design to fit our using a pair of 9/16” wrenches See Figure 4.12. equipment and are not standard lengths. Use of a non-OEM belt may prevent the mowing deck from working properly.

  • Page 24: Deck Timing Belt

    CUTTING DECK AND LIFT SHAFT Remove the belt guide by the engine pulley with Deck Timing Belt a pair of 3/8 wrenches. See Figure 4.13. To service the deck timing belt: Take the deck cover off by removing the three self tapping screws.
  • Page 25 CUTTING DECK AND LIFT SHAFT Slide the belt off of the left side spindle. With the tension relieved slip the timing belt off of the pulleys. Back the jam nut on the idler stop bolt to the head of the bolt. See Figure 4.16. To install the timing belt turn the blades 90 apart.

  • Page 26: Deck Engagement (Pto) Cable

    CUTTING DECK AND LIFT SHAFT Slide the timing belt over the spindles. Test run the mower before returning to service. Swing the idler pulley away from the belt using a Deck engagement (PTO) cable 3/8” ratchet for leverage. To service the PTO cable: Slip the timing belt behind the idler pulley.
  • Page 27 CUTTING DECK AND LIFT SHAFT Take the deck cover off by removing the three Remove the cable from the frame using two 1/2” nuts and bolts. See Figure 4.24. wrenches. See Figure 4.26. NOTE: depending on production date the nuts and bolts may have been replaced by self tap- Blade cable ping screws.

  • Page 28: Leveling The Deck

    Clips deck is lower or higher and proceed to the next step. NOTE: Use of Cub Cadet deck leveling gauge, part number 490-900-0041, will make measuring the blade tip height easier. See Figure 4.27. Figure 4.28 Remove the deck height lever with a 1/2”...
  • Page 29 CUTTING DECK AND LIFT SHAFT NOTE: The deck adjustment lever is divided into three (3) parts, the adjustment handle and two (2) lever pivot brackets. See Figure 4.30. Adjustment handle Lever Pivot Brackets Figure 4.30 Remove the split bushing from the rear lift shaft. See Figure 4.31.

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