Cub Cadet RZT-S Professional Shop Manual
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Cub Cadet RZT-S Professional Shop Manual

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See also: Owner's Manual , Operator's Manual
For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983
Professional Shop Manual
RZT-S
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.
© Copyright 2012 MTD Products Inc. All Rights Reserved
MTD Products Inc. - Product Training and Education Department
www.mymowerparts.com

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Do you have a question about the RZT-S and is the answer not in the manual?

Questions and answers

Clarence Robinson
April 18, 2025

Hello, I have a cub cadet rzt sx that shut down due to lack of fuel. It doesn't,have an inline filter as seen in the manual. where is the filter located

0
1 comments:
Mr. Anderson
May 9, 2025

The exact location of the fuel filter on a Cub Cadet RZT-S is not specified in the provided information. However, the context indicates that the fuel filter is connected to fuel lines and can be accessed for replacement by clamping off the fuel lines and sliding them off the filter. It is likely located along the fuel line between the fuel tank and engine.

This answer is automatically generated

0
jerry
June 3, 2025

torque value for front wheel axils

0
Tom Brasko
May 2, 2025

mower does not turn left

0

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Summary of Contents for Cub Cadet RZT-S

  • Page 1 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Professional Shop Manual RZT-S 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.
  • Page 2 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...

  • Page 3: Table Of Contents

    Description of the RZT-S ........
  • Page 4 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Chapter 6: electrical system Introduction ........... 61 PTO Switch .
  • Page 5 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Diodes ............99 Relay .
  • Page 6 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...

  • Page 7: Professional Shop Manual Intent

    • 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.
  • Page 8 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S • Be prepared in case of emergency: ! CAUTION ! CAUTION 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.

  • Page 9: 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. Description of the RZT-S The RZT-S combines a traditional RZT lap bar zero turn rider (ZTR) with Cub Cadet’s patented Syncro Steer technology.

  • Page 10: Model And Serial Numbers

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Model and Serial Numbers The model and serial number tag can be found under the seat. See Figure 1.2. The serial number is located to the right of the model number as shown above.

  • Page 11: Muffler

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Engine Related Parts CHAPTER 2: ENGINE RELATED PARTS This chapter will cover the engine accessories that are manufactured by Cub Cadet. IMPORTANT: The engine is supplied by Kohler. Refer to the Kohler manual for engine specific service infor- mation.

  • Page 12: Fuel Tank Removal/Replacement

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Fuel System Fuel tank removal/replacement Remove/replace the fuel tank by following these steps: Gasoline and its vapors are ! CAUTION ! CAUTION extremely flammable. Use com- mon sense when working around the fuel system.
  • Page 13 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Engine Related Parts Remove the screw from the front of the fender using a T-27 torx driver. See Figure 2.5. 1d. Unscrew the fuel cap. Screw NOTE: The fuel cap is tethered to the fender. This is an EPA tier III requirement.

  • Page 14: Fuel Pick Up Tube

    Fuel pick up tube The fuel tank on the RZT-S mower has a fuel pick up tube. This is a rigid tube that runs from the bottom of the tank to the top of the tank were the fuel line attaches to it.

  • Page 15: Fuel Line

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Engine Related Parts Fitting Inspect the pick up tube. See Figure 2.9. NOTE: If the pick up tube is loose or missing, it must be replaced. Install the grommet in the fuel tank.

  • Page 16: Evaporative (Evap) Emissions System

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Evaporative (EVAP) emissions system The EPA has enacted rules that regulate the amount of vapors an engine’s fuel system is allowed to vent to the atmosphere. The rules are know as tier III emissions guidelines. These rules apply to all engines built on or after 1/1/ 2012.
  • Page 17 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Engine Related Parts Troubleshooting Symptom Cause Engine starts, then dies A blockage in the vent hose. The roll over valve is stuck closed. Engine runs rich Raw gasoline in the charcoal canister (if equipped).

  • Page 18: Roll Over Valve Vent

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Roll over valve vent To remove the roll over valve: Remove the left fender by following the procedures Vent hose described in Chapter 3: Body. Disconnect the vent hose. See Figure 2.13.
  • Page 19 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Engine Related Parts Testing the roll over valve The roll over valve vent has two functions. The first function is to vent the tank and the second function is to close off the vent if the tank is inverted.

  • Page 20: Control Cable Adjustment

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Control cable adjustment To adjust the control cable: Move the throttle lever to the detent between the full throttle and the choke position. Loosen the clamp that holds the control cable jacket Choke lever in position.

  • Page 21: Floor Pan

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Body CHAPTER 3: BODY Floor pan To remove/replace the floor pan: Remove the steering wheel: 1a. Turn the steering wheel so that the wheels are pointing straight ahead. Screw 1b. Gently pry the cover off of the steering wheel.
  • Page 22 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Z-Force-S Remove the reverse pedal using a pair of 7/16” wrenches. See Figure 3.3. Reverse pedal Figure 3.3 Remove the forward drive pedal: See Figure 3.4. Remove the screw that secures the drive pedal to the pedal shaft bell crank using a 1/2”...

  • Page 23: Left Fender

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Body Left fender To remove/replace the left fender: NOTE: The fuel tank is nested inside the left fender. Gasoline and its vapors are ! CAUTION ! CAUTION extremely flammable. Use com- mon sense when working around the fuel system.

  • Page 24: Right Fender

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Z-Force-S Right fender To remove/replace the right fender: Remove the yellow throttle lever using a #1 phillips screwdriver. See Figure 3.9. Disconnect the throttle lever assembly from the right fender using a T-30 torx driver. See Figure 3.9.
  • Page 25 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Body Disconnect the key switch. See Figure 3.12. Disconnect the hour meter. Hour meter Key switch Disconnect the PTO switch. PTO switch Figure 3.12 Remove the two screws from the underside of the right fender using a 3/8”...

  • Page 26: Seat Box Assembly

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Z-Force-S Seat box assembly To remove/replace the seat box assembly: Remove the battery. Remove the deck by following the procedures described in Chapter 7: Decks and Lift Shaft. Remove the left fender by following the procedures Harness described in the left fender section of this chapter.
  • Page 27 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Body 10. Remove the four screws (two on each side), securing the seat box to the cross member using a 1/2” wrench. See Figure 3.17. Screws Figure 3.17 Cross member screw 11.
  • Page 28 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Z-Force-S www.mymowerparts.com...

  • Page 29: Brake System Description

    Brake system description The RZT-S uses twin EZT Hydro-Gear transmissions to drive the rear wheels. The hydraulic action of the trans- missions will provide the braking for the mower while it is in motion. There is a friction brake on the transmission that is used as a parking brake.

  • Page 30: Brake Adjustment

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Brake adjustment NOTE: When performing a brake adjustment, inspect the brake components for signs of wear or damage. Block the front wheels. Lift and safely support the rear of the mower.

  • Page 31: Brake Puck/Rotor Replacement

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System Brake puck/rotor replacement On Hydro-Gear transmissions, the brake pucks are wearing parts that will need to be serviced from time to time. If a mower is operated with the parking brake dragging, the pucks will wear out rapidly and the brake rotor will develop hot spots.
  • Page 32 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the front mounting bolt, allowing the caliper to swing down. See Figure 4.7. The outboard brake puck should fall out when the brake caliper swings down. If it did not, it can be removed now.
  • Page 33 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System 14. Place a new puck into the caliper. See Figure 4.10. NOTE: A piece of scotch tape may be used to hold the new brake pucks in place for assembly. The tape will grind away when the brakes are applied.

  • Page 34: Brake Shaft Bushings

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Brake shaft Bushings NOTE: The brake shaft is captive on the deck lift shaft. It is serviced with the deck lift shaft. Refer to the deck lift shaft section of Chapter 7: Decks and Lift Shaft for removal/replacement procedures.
  • Page 35 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System Brake shaft Remove the split spacer from the right side of the deck lift shaft. See Figure 4.13. Split spacer Deck lift shaft Figure 4.13 10. Slide the right split bushing out of the brake shaft until it is full exposed.

  • Page 36: Drive Belt

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Drive belt To remove/replace the drive belt: NOTE: If a drive belt fails prematurely, find and cor- rect the cause of the failure. Battery Remove the deck as described in Chapter 7: Cut- ting Decks and Lift Shaft.
  • Page 37 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System PTO Harness Remove the rear belt guard using a 3/8” wrench. Belt guard See Figure 4.19. Disconnect the harness from the PTO clutch Figure 4.19 10. Disconnect the brake de-clutching rod from the idler pulley bracket.

  • Page 38: Drive Belt Adjustment

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Drive belt adjustment The drive belt is tensioned by a spring loaded idler pulley. When the brakes are applied, the drive belt is de- clutched. An adjustable linkage connects the tensioning pulley to the brake shaft. A brake link that is out of adjust- ment will prevent the moveable idler from correctly tensioning and de-tensioning the belt.

  • Page 39: Transmission Removal/Replacement

    Transmission removal is not difficult and allows the transmission to be more completely drained. The fluid used is 20W50 motor oil. Cub Cadet Hydraulic Drive System Fluid Plus (1 qt. P/N: 737-3120) is a pre- mium alternative if the fluid is being completely drained and replaced.
  • Page 40 All of these factors will contribute to the wear rate of the transmissions. Generally speaking, the transmissions on Cub Cadet mowers and tractors with SynchroSteer technology hold up slightly better than in lap bar applications because some of the steering load is taken by the front wheels.
  • Page 41 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System To remove/replace a transmission: Remove the deck as described in Chapter 7: Cutting Spring Decks and Lift Shaft. Lift and safely support the rear of the mower.
  • Page 42 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the nut and bolt that holds the front of the transmission to the mounting bracket using a pair of 1/2” wrenches. See Figure 4.27. Mounting bracket Figure 4.27 Remove the nut, T-bolt and spacer that connect the transmissions to each other using a 1/2”...
  • Page 43 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System 11. Remove the bowtie clip that secures the bypass rod Bypass rod to the by-pass arm. See Figure 4.30. 12. Slide the bypass rod off of the bypass arm.

  • Page 44: Hydro Neutral Control Adjustment

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Hydro neutral control adjustment NOTE: Neutral control rarely goes out of adjustment on its own. If it needs adjustment, check for damaged linkage or signs of tampering. The mower engine and drive system must be operated to complete this procedure. Confirm...
  • Page 45 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System Disconnect both of the drive control rods from the transmission control arms using a pair of 9/16” wrenches. See Figure 4.34. Drive control rods Figure 4.34 Start the engine and advance throttle to maximum RPM.
  • Page 46 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Socket head cap screw With the engine still running, locate the socket head cap screw in the slot of the transmission control arm on the transmission that needs to be adjusted.

  • Page 47: Control Pedal Shaft Assembly

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System Control pedal shaft assembly NOTE: The control pedal shaft is an assembly of the brake pedal shaft and the drive pedal shaft. Steering shaft bolt To remove/replace the control pedal shaft assembly: Remove the floor board by following the procedures described in Chapter 3: Body.
  • Page 48 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the two nuts and bolts that hold the front of the steering column assembly to the mower using a pair of 1/2” wrenches. See Figure 4.40. Bolts Figure 4.40 Remove the two screws that hold the rear of the steering column assembly to the mower using a 1/2”...
  • Page 49 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System 12. Remove the bolt that is pressing against the left con- trol pedal shaft bracket and its nut using a pair of 9/ 16” wrenches. See Figure 4.43.
  • Page 50 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Disconnect the reverse switch. Remove the two screws that hold the right control pedal bracket to the frame using a 1/2” wrench. See Figure 4.46. Screws Lift the control pedal shaft assembly out of the mower.
  • Page 51 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Brakes and Drive System 24. Make sure the pinion gear is installed so that the tim- ing marks on the pinion gear line up with the timing Timing marks marks on the sector gears.
  • Page 52 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S www.mymowerparts.com...

  • Page 53: Introduction

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering CHAPTER 5: STEERING Introduction The steering on the RZT-S mower works in two phases. • First it steers like any other riding mower by turning the front wheels. • Second and more importantly, the steering linkage controls the drive output of the two Hydro-Gear trans- missions.

  • Page 54: Wheel Alignment And Drive Control Link Adjustments

    IMPORTANT: Check the tire air pressure and wear before attempting to diagnose any problems with the steering or tracking of a RZT-S riding mower. If the tire circumferences are not equal across the same axles, it will greatly affect the performance of the riding mower.
  • Page 55 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering 8. Install the segment gear alignment pins (1/4”). Alignment pin See Figure 5.3. Figure 5.3 9. Insert the axle casting (5/16”) alignment pins into the alignment holes in both axle castings.
  • Page 56 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Install the speed cam alignment bar. See Figure 5.6. Timing mark Timing mark Speed cam alignment bar Figure 5.6 Install the control link alignment fixture in the slots of the control links. See Figure 5.7.

  • Page 57: Front Wheels

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering Front wheels Remove/ replace the front wheels: Axle bolt 1. Lift and safely support the front end of the riding mower. 2. Remove the axle bolt and nut using a pair of 3/4”...
  • Page 58 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S To replace the front wheel bearings: Lift and safely support the front of the mower. Punch Remove the front wheel by following the procedures describe in the previous section of this chapter.

  • Page 59: Front Yokes

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering Front yokes To remove/ replace the front yokes: Yoke cover Lift and safely support the front of the mower. 2. Remove the front wheel by following the procedures in the front wheel section of this chapter.

  • Page 60: Removal Of The Steering Gears

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Removal of the steering gears To remove the steering gears: Remove the floor pan, following the procedures described in Chapter 3: Body. Remove the nut from the bolt that holds the drag link to the inboard steering gear using a pair of 9/16”...
  • Page 61 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering NOTE: The same part number gear is used on both yokes. If the gear is to be used on the left yoke, install it so that the LH stamped into the gear is facing up. If the gear is to be used on the right yoke, install it so that the RH stamped into the gear is facing up.
  • Page 62 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Installation and timing of the steering gears To install and time the steering gears: Install the alignment fixtures and alignment pins by following the procedures described in the wheel alignment and drive control link adjustments section “RH”...
  • Page 63 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering 11. Attach the drag link ball joint end to the inboard steering gear. Use a pair of 1/2” wrenches to tighten the nut and bolt. NOTE: If necessary, adjust the drag link ball joint end so that the hole in the ball joint end lines up with the hole in the steering gear.

  • Page 64: Drag Links

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Drag links To remove/replace a drag link: Remove the floor pan by following the procedures described in Chapter 3: Body. Turn the steering wheel so that the drag links outer ball joint is accessible through the opening if the frame.
  • Page 65 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Steering 7. Remove the ball joint ends, counting the number of turns required to remove each ball joint. See Figure 5.27. 8. Remove the jam nuts. 9. Install the jam nuts on the new drag link.
  • Page 66 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S www.mymowerparts.com...

  • Page 67: Introduction

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System CHAPTER 6: ELECTRICAL SYSTEM Introduction This chapter is divided into five sections: • Introduction: About this chapter and precautions • Components: This section will describe the location and operation of the electrical components on the mower.
  • Page 68 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S • Symptom: loud “BANG” when key is turned to the OFF position: The after fire solenoid is not closing, either because it is physically damaged or the power is not being turned off. Check for power at the sole- noid.

  • Page 69: Pto Switch

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System PTO Switch Understanding the PTO switch A-COM is in the starter circuit. It is a Normally Closed (NC) set of contacts. Power coming from the brake switch (key switch in START, brakes ON) flows through the orange wire with black trace to the PTO switch.

  • Page 70: Reverse Safety Switch

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Reverse Safety Switch Reverse pedal The Reverse Safety Switch is mounted on the right bracket brake pedal shaft support bracket. It is the same part num- ber as the parking brake switch. It has two sets of con- tacts, but only the normally open (NO) set is used.

  • Page 71: Starter Solenoid

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Starter solenoid The starter solenoid is mounted to the rear frame cross member under the seat. See Figure 7.6. • When the proper safety conditions are met (brake applied and PTO OFF), the orange wire with white...

  • Page 72: Start Circuit

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Start Circuit Turning the key to the START position: • spins the starter motor • enables the ignition • energizes the afterfire solenoid The circuit that sends power to the starter motor: See Figure 7.8.
  • Page 73 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Magneto Once the starter motor spins, it still needs spark and fuel to run. Looking at the circuits that do that: Magneto The ignition sparks are generated by an ignition module.
  • Page 74 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S The L terminal on the key switch sends power to: • the Afterfire Solenoid • the windings of the PTO Relay • the PTO Switch C-COM terminal • the System Monitor See Figure 7.11.

  • Page 75: Run Circuit

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Run Circuit With the key switch in the RUN position, the L terminal sends power to: • the Afterfire Solenoid • the windings of the PTO Relay • the PTO Switch C-COM terminal •...

  • Page 76: Engine Shut-Down Circuits

    That function was left in place so that the same key switch can be used, but it is not needed. The RZT-S powers the solenoid through the L terminal of the key switch and not the alternator.

  • Page 77: Charging Circuit

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Charging circuit How it works Stator When the engine is running, magnets attached to the underside of the flywheel induce AC (Alternating Cur- rent) in the stator that is mounted beneath the fly- wheel.
  • Page 78 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S From the harness connector: See Figure 7.17. The red/white trace wire leads to the 20A fuse. From the fuse, the wire connects to the starter solenoid, sharing the “hot” post with the bat- tery cable.
  • Page 79 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System System check, to identify the problem The system check consists of: • Stator check • Regulator Rectifier check • Downstream check Stator check: See Figure 7.19. 5a. Key OFF, unplug the stator from the regulator rectifier.
  • Page 80 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Interpretation: • If the stator fails either or both tests, it is likely to be bad. • If the stator fails the output test, but passes the resistance test, there is a possibility that the magnets on the rotor (flywheel) have lost their fields.
  • Page 81 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System If the regulator/rectifier fails any one of these tests, replace it with a new one. Test # Pos. Probe COM. Probe Results Housing O.L. (infinite resistance) Housing AC 1 O.L.

  • Page 82: Pto Circuit

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S PTO Circuit Basic Operation: See Figure 7.24. With the key switch in any position other than OFF, the L terminal supplies power to the windings of the PTO relay and to the C-COM terminal of the PTO switch.
  • Page 83 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Once the PTO relay is energized by a ground path through one of the safety switches, it latches. See Figure 7.25. 3a. The PTO clutch ground path that passes through the PTO relay is disconnected from the clutch.

  • Page 84: Diagnostic Techniques

    RZT-S Diagnostic Techniques NOTE: Electrical diagnostic procedures and tools are the same for all Cub Cadet and MTD mowers. This sec- tion is written in a way to provide basic trouble shooting skills that can be used on any mower.

  • Page 85: Electrical Environment: Ac Vs. Dc

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System • Low Voltage: Many electronic devices simply stop working if system voltage falls below a given thresh- old. If a 12 volt system is run at 11 volts with a failing alternator, electronic controls may stop working.

  • Page 86: Ohm's Law

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Ohm’s Law Ohm’s Law relates voltage, amperage, and resistance. It states that voltage is the product of resistance times current. • It is written as V = I x R.

  • Page 87: Kirchhoff's Voltage Law

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Kirchhoff’s voltage law Kirchhoff’s voltage law deals with voltage drops. A voltage drop is the amount of voltage used up or “dropped” by resistance in a circuit. Ohm’s law states that V = I x R, every component in a circuit has resistance, even the wires.

  • Page 88: Types Of Circuits

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Types of circuits There are three ways a circuit can be wired: • Series • Parallel • Series/parallel Series Series circuits are wired so that the current has only one path to follow. If one component in the system fails, the circuit will be broken and whole system will not work.

  • Page 89: Series/Parallel

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Series/parallel Series/parallel circuits have some sections wired in series and some in parallel. See Figure 7.31. Lamp Battery Lamp Lamp Lamp Switch Figure 7.31 What can go wrong? There are three types of failures that can occur in an electrical circuit:...

  • Page 90: The Tools

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S The Tools Equipment needed to diagnose an electrical system: • DMM (Digital Multi-Meter) • Wiring schematic or diagram Equipment that may be useful: • Fused jumper wires • Test light •...

  • Page 91: Digital Multi-Meter

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Digital Multi-meter A DMM is the most useful tool to troubleshoot any electrical system. There is an amazing variety of DMMs on the market. Some are very basic, others are tailored to specific industries, and some high-end graphing meters function like oscilloscopes.

  • Page 92: Wiring Diagram Or Schematic

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Wiring diagram or schematic A wiring or a schematic diagram, and the ability to read it, are very important in troubleshooting a circuit. The dia- gram shows how the circuit was designed and what paths the electricity is suppose to flow.

  • Page 93: Ammeters And Specialized Charging System Testers

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Ammeters and specialized charging system testers Inductive ammeters are available in many forms. Some DMM with inductive are as simple as a gauge to be held against the circuit in ammeter feature question when it is energized.

  • Page 94: Batteries

    These chemicals are known in the State of California to cause cancer and reproductive harm. Wash hands after handling NOTE: The batteries used in Current Cub Cadet equipment are sealed. It is not possible to check, test or add fluid.

  • Page 95: Checking Battery Condition

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Checking battery condition There are three things to do when testing a battery: • Visual inspection • Electrolyte test • Operational test Visual inspection • Inspect the battery and battery connections for corrosion. Clean if necessary. Neutralize acid with baking soda, and protect the terminals once they are cleaned.

  • Page 96: Battery Testers

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Battery Testers There are four major ways to check a battery: • Electrolyte test using a specific gravity tester (hydrometer) to compare the density of the electrolyte in a fully charged battery to the density of water (water = 1.0 s.g.).

  • Page 97: Fixed Load Testers

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Fixed load testers Fixed load testers (sometimes called toasters) are inex- pensive load testers found at any auto parts store. See Figure 7.37. NOTE: Because they have a fixed load value, they do not give most batteries a reliable and safe load test.

  • Page 98: Battery Discharge Test

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Battery discharge test Occasionally a battery will discharge while sitting unused. To test for a battery that is “leaking” voltage: Confirm that operator technique is not creating a sit- uation that causes a draw. As an example, if a...

  • Page 99: Electrical Troubleshooting

    Use the hour meter and indicator lamps as a guide to direct the search. As an example, when diagnosing a “no-crank” condition on a RZT-S mower: if the PTO light is lit on the hour meter but the technician has visually verified that the PTO clutch is not engaged, the PTO circuit would be a reasonable place to check for problems.
  • Page 100 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Starting with a fully charged battery and battery cable connections that are clean and tight, measure the battery voltage. See Figure 7.40. With the circuit energized, start at either end of the circuit and check for voltage.

  • Page 101: Voltage Drop Test

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Voltage Drop Test To review: • Ohm’s law states that it takes voltage to push current through a resistance. • Kirchhoff’s voltage law states that the sum of all the voltage drops equals the source voltage.
  • Page 102 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S A similar ground-side test on a mower with a slow- cranking starter motor can be conducted between the engine block and the negative battery post. See Figure 7.43. With the starter engaged, this machine exhibited a voltage-drop reading of 0.312 volts, indicating a...
  • Page 103 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Voltage drop on a good circuit should be less than 0.1 volts. A voltage drop reading on the meter of greater than 0.2 volts indicates a fairly substantial problem that demands attention.

  • Page 104: Testing Switches

    Isolate the switch from the rest of the circuit. Test each pair of terminals for continuity in all modes of switch operation: at-rest, and actuated. Many switches on Cub Cadet equipment are typed by their at-rest state: Normally Open, Normally Closed, Common.

  • Page 105: Diodes

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Diodes What is a diode? A diode acts like a one way valve, allowing current to flow in only one direction. See Figure 7.47. Silver band • Which way does this electrical check-valve work? There will be a band on one end of the diode.
  • Page 106 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S No continuity Switch the leads and repeat the test. The meter should indicate no continuity. Silver band See Figure 7.50. If the results do not match the above, replace the diode.

  • Page 107: Relay

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Electrical System Relay Most of the relays used by MTD or Cub Cadet have five Spade 3 Common pins. See Figure 7.51. • Windings: Terminals 1 & 2 are the outer-most Spade 5 NO of the row of three small spade terminals.

  • Page 108: Schematic

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Schematic www.mymowerparts.com...

  • Page 109: Chapter 7: Decks And Lift Shaft

    CHAPTER 7: DECKS AND LIFT SHAFT Cutting decks The RZT-S comes with the option of a 42”, 46” or 50” floating deck. The decks are made of 13-gauge stamped steel. The procedure to remove the deck is the same for all of them.

  • Page 110: Cleaning The Deck

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Locate the LH and RH deck release pins on each side of the deck. Pull the release pins outward and release the deck from the LH and RH deck lift arms.

  • Page 111: Blades

    Blades come in a variety of styles; side discharge, mulching, bagging, combination, there are even de-thatching blades on the market. The RZT S comes with what Cub Cadet calls a 3 in 1 blade. This means it can side discharge, bag and mulch.
  • Page 112 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the blade. Install the blade by following the above steps in Star reverse order. Tighten the blade nut to a torque of 70 - 90 ft-lbs (95 - 122 Nm).

  • Page 113: Deck Belt

    NOTE: Not all belt damage is visible. Broken cords inside the belt are not visible to the naked eye, but can cause vibration issues and greatly reduce the life of the belt. Cub Cadet belts are design to fit our equipment and are not standard lengths. Use of a non- ! CAUTION ! CAUTION OEM belt may prevent the mowing deck from working properly.
  • Page 114 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S To replace the 46” deck belt: Remove the deck as described at the beginning of this chapter. NOTE: Removal of the deck is not necessary, but makes it easier to route the belt around the spindles.

  • Page 115: Idler Pulleys

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Decks and Lift Shaft Idler pulleys NOTE: The decks used on RZT-S mowers have fixed idlers and movable idlers. Fixed idler pulley To remove/replace a fixed idler pulley: Remove the deck as described at the beginning of this chapter.
  • Page 116 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the idler bracket: Disconnect the idler spring. See Figure 7.12. Remove the nut, bolt and shoulder spacer that hold the bracket to the deck. Spring Idler bracket Figure 7.12 Install the bolt that the pulley spins on in the idler bracket.

  • Page 117: Spindle Shafts

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Decks and Lift Shaft Spindle shafts To replace a spindle shaft: Remove the deck as described at the beginning of this chapter. Slip the deck belt off of the spindle pulley that is to be serviced.

  • Page 118: Spindle Removal/Installation

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Spindle removal/installation To remove/rebuild a spindle: Remove the deck as described at the beginning of this chapter. Remove the blade following the steps described in the blade section of this chapter.

  • Page 119: Spindle Overhaul

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Decks and Lift Shaft Spindle overhaul To rebuild a spindle: Pulley Remove the spindle by following the procedures described in the spindle removal section of this chap- Washer ter. Shaft Remove the spindle pulley, spacer and washer using an impact wrench and a 15/16”...
  • Page 120 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Remove the lower bearing. NOTE: The bearing should have a slip fit in the Brass punch housing. If the bearing does not slide out of the housing, it can be driven out of the hous- ing using a brass punch.

  • Page 121: Leveling The Deck

    Figure 7.23 higher and proceed to the next step. NOTE: Use of Cub Cadet deck leveling gauge, part num- ber 490-900-0041, will make measuring the blade tip height easier. See Figure 7.24.

  • Page 122: Front To Rear (Pitch) Leveling

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Loosen, but do NOT remove, the hex bolt on the front left deck hanger link. See Figure 7.25. NOTE: The front right deck hanger link is not adjust- able To level the deck turn the adjustment gear, located immediately behind the bolt.

  • Page 123: Deck Gauge Wheel Adjustment

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Decks and Lift Shaft Deck Gauge Wheel Adjustment The cutting decks are of a “floating” design. This means that they are suspended above the ground. The gauge wheels occasionally touch the ground. They are designed to bump the deck up and over ground surface irregulari- ties.

  • Page 124: Deck Lift Shaft Assembly

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Deck lift shaft assembly NOTE: The brake shaft is a tube that slides over the deck lift shaft and is held captive by lift shaft Brake shaft arms, becoming part of the lift shaft assem- bly.
  • Page 125 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Decks and Lift Shaft Remove both of the deck lift shaft brackets by remov- ing the two screws that hold them in place using a 1/ 2” wrench. See Figure 7.31.
  • Page 126 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S www.mymowerparts.com...

  • Page 127: Chapter 8: Maintenance Intervals

    CHAPTER 8: MAINTENANCE INTERVALS Lubrication To help keep the RZT-S in proper running order, Cub Cadet recommends the following lubrication intervals be used (adjustable to local conditions). Lubricate with Cub Cadet part number 737-0168 grease or an equivalent NGLI grade 2 lithium based, lead-free multi-purpose non-soap grease.

  • Page 128: Remove/Replace Spark Plugs

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S The spark plugs The spark plugs should be checked, cleaned and re-gapped on a monthly basis or every 100 hours of use. The spark plugs should be replaced after every 500 hours of use.

  • Page 129: Air Filter

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Maintenance Intervals Air filter A dirty air filter can reduce engine power, increase fuel Air filter door consumption and make starting more difficult. The air filter should be cleaned every 100 hours and replaced every 200 hours of use.

  • Page 130: To Change The Oil

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S Oil change The oil change interval is every 100 hrs. NOTE: The first oil change should be preformed at 8 hours. To change the oil: Place a suitable drain pan under the rear of the mower.

  • Page 131: Oil Filter

    For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 Maintenance Intervals Oil filter To replace the oil filter: Drain the oil by following the steps described in the previous section of this chapter. Fuel filter Clean the area around the oil filter Remove the oil filter by turning it counter-clockwise, as seen from the right side of the mower.

  • Page 132: Fuel System

    Fuel used in Cub Cadet outdoor power equipment should be no more than 30 days old. Because it may already have been stored at the refinery or gas station for a week or more, fuel should be purchased in small quantities and stored in safety approved gas cans with the caps closed.

  • Page 133: Clean The Engine

    Carefully slide the fuel lines off of the filter. If there are pieces of rubber on the barbs of the fuel filter, replace the affected fuel line. IMPORTANT: The RZT-S uses low permeation fuel line to meet EPA guidelines. When replacing the fuel lines, they must be replaced with the same type of low permeation fuel line.
  • Page 134 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 RZT-S www.mymowerparts.com...
  • Page 135 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 www.mymowerparts.com...
  • Page 136 For Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983 MTD Products Inc - Product Training and Education Department FORM NUMBER - 769-08005/00 5/2012 www.mymowerparts.com...

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