Cub Cadet 435A Spécifications

Professional Shop ManualRZT-SMTD Products Inc. - Product Training and Education DepartmentNOTE: These materials are for use by trained technicians who

RZT-S4Model 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 rig

RZT-S946. Starting with a fully charged battery and battery cable connections that are clean and tight, measure the battery voltage. See Figure 7.40.7

Electrical System95Voltage Drop TestTo review:• Ohm’s law states that it takes voltage to push current through a resistance.• Kirchhoff’s voltage law

RZT-S96 A similar ground-side test on a mower with a slow-cranking starter motor can be conducted between the engine block and the negative batter

Electrical System976. 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 in

RZT-S98Testing switches• Refer to the “Components” section of this chapter that describes the function of the individual switches to be tested. • Swit

Electrical System99Diodes What is a diode? A diode acts like a one way valve, allowing current to flow in only one direction. S

RZT-S1006. Switch the leads and repeat the test.7. The meter should indicate no continuity. See Figure 7.50.8. If the results do no

Electrical System101Relay Most of the relays used by MTD or Cub Cadet have five pins. See Figure 7.51.• Windings: Terminals 1 & 2 are the out

RZT-S102Schematic+($'/,*+7&211(&725www.mymowerparts.comFor Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983

Decks and Lift Shaft103Cutting decksThe RZT-S comes with the option of a 42”, 46” or 50” floating deck. The decks are made of 13-gauge stamped steel.

Engine Related Parts5This chapter will cover the engine accessories that are manufactured by Cub Cadet. IMPORTANT: The engine is supplied by Kohler. R

RZT-S104.8. 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 dec

Decks and Lift Shaft105BladesThe condition of the blades will greatly effect the quality of the cut. The blades should be sharpened and bal-anced afte

RZT-S1064. Remove the blade.5. Install the blade by following the above steps in reverse order. Tighten the blade nut to a torque of 70 - 90 ft-lbs (9

Decks and Lift Shaft107Deck beltThe cutting deck uses a single belt design.The function of the deck belt is to transfer the mechanical force from the

RZT-S108To replace the 46” deck belt:1. Remove the deck as described at the beginning of this chapter.NOTE: Removal of the deck is not necessary, but

Decks and Lift Shaft109Idler pulleysNOTE: The decks used on RZT-S mowers have fixed idlers and movable idlers.Fixed idler pulleyTo remove/replace a fi

RZT-S1103. Remove the idler bracket:3a. Disconnect the idler spring. See Figure 7.12.3b. Remove the nut, bolt and shoulder spacer that hold the bracke

Decks and Lift Shaft111Spindle shaftsTo replace a spindle shaft:1. Remove the deck as described at the beginning of this chapter.2. Slip the deck

RZT-S112Spindle removal/installationTo remove/rebuild a spindle:1. Remove the deck as described at the beginning of this chapter.2. Remove the blade f

Decks and Lift Shaft113Spindle overhaulTo rebuild a spindle:1. Remove the spindle by following the procedures described in the spindle removal sec

RZT-S6Fuel SystemFuel tank removal/replacementRemove/replace the fuel tank by following these steps:1. Remove the left fender:1a. Remove the two screw

RZT-S1146. Remove the lower bearing.NOTE: The bearing should have a slip fit in the housing. If the bearing does not slide out of the housing, it can

Decks and Lift Shaft115Leveling the deck For the best quality cut, the deck must be level side to side and the front of the deck should be 1/4” lo

RZT-S1163. 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 a

Decks and Lift Shaft117Deck Gauge Wheel AdjustmentThe cutting decks are of a “floating” design. This means that they are suspended above the ground. T

RZT-S118Deck lift shaft assemblyNOTE: The brake shaft is a tube that slides over the deck lift shaft and is held captive by lift shaft arms, becoming

Decks and Lift Shaft1196. 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 Fig

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Maintenance Intervals121LubricationTo help keep the RZT-S in proper running order, Cub Cadet recommends the following lubrication intervals be used (a

RZT-S122The spark plugsThe spark plugs should be checked, cleaned and re-gapped on a monthly basis or every 100 hours of use. The spark plugs should b

Maintenance Intervals123Air filter A dirty air filter can reduce engine power, increase fuel consumption and make starting more difficult. The ai

Engine Related Parts71c. Remove the screw from the front of the fender using a T-27 torx driver. See Figure 2.5.1d. Unscrew the fuel cap.NOTE: The fue

RZT-S124Oil changeThe oil change interval is every 100 hrs.NOTE: The first oil change should be preformed at 8 hours.To change the oil:1. Place a suit

Maintenance Intervals125Oil filterTo replace the oil filter:1. Drain the oil by following the steps described in the previous section of this chap

RZT-S126Fuel systemWhat you should know about fuel.Most of the fuel presently available in North America is oxygenated to some extent. This is commonl

Maintenance Intervals1273. Carefully slide the fuel lines off of the filter. If there are pieces of rubber on the barbs of the fuel filter, replace th

RZT-S128www.mymowerparts.comFor Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983

www.mymowerparts.comFor Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983

MTD Products Inc - Product Training and Education DepartmentFORM NUMBER - 769-08005/005/2012www.mymowerparts.comFor Discount Cub Cadet Parts Call 606

RZT-S8Fuel pick up tubeThe 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

Engine Related Parts96. Inspect the pick up tube. See Figure 2.9.NOTE: If the pick up tube is loose or missing, it must be replaced.7. Install the gro

RZT-S10Evaporative (EVAP) emissions systemThe EPA has enacted rules that regulate the amount of vapors an engine’s fuel system is allowed to vent to t

Engine Related Parts11TroubleshootingSymptom CauseEngine starts, then dies A blockage in the vent hose.The roll over valve is stuck closed.Engine runs

RZT-S12Roll over valve ventTo remove the roll over valve:1. Remove the left fender by following the procedures described in Chapter 3: Body.2. Disconn

Engine Related Parts13Testing the roll over valve The roll over valve vent has two functions. The first function is to vent the tank and the secon

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RZT-S14Control cable adjustmentTo adjust the control cable:1. Move the throttle lever to the detent between the full throttle and the choke position.2

Body15Floor panTo remove/replace the floor pan:1. Remove the steering wheel:1a. Turn the steering wheel so that the wheels are pointing straight a

Z-Force-S163. Remove the reverse pedal using a pair of 7/16” wrenches. See Figure 3.3.4. Remove the forward drive pedal: See Figure 3.4.4a. Remove the

Body17Left fenderTo remove/replace the left fender:NOTE: The fuel tank is nested inside the left fender.1. Remove the two screws, indicated by the

Z-Force-S18Right fenderTo remove/replace the right fender:1. Remove the yellow throttle lever using a #1 phillips screwdriver. See Figure 3.9.2. Disco

Body196. Disconnect the key switch. See Figure 3.12.7. Disconnect the hour meter.8. Disconnect the PTO switch.9. Remove the two screws from the unders

Z-Force-S20Seat box assemblyTo remove/replace the seat box assembly:1. Remove the battery.2. Remove the deck by following the procedures described in

Body2110. Remove the four screws (two on each side), securing the seat box to the cross member using a 1/2” wrench. See Figure 3.17.11. Remove the fou

Z-Force-S22www.mymowerparts.comFor Discount Cub Cadet Parts Call 606-678-9623 or 606-561-4983

Brakes and Drive System23Brake system descriptionThe RZT-S uses twin EZT Hydro-Gear transmissions to drive the rear wheels. The hydraulic action of th

IChapter 1: IntroductionProfessional Shop Manual intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Fasteners . . . . .

RZT-S24Brake adjustment NOTE: When performing a brake adjustment, inspect the brake components for signs of wear or damage.1. Block the front wheels.2

Brakes and Drive System25Brake puck/rotor replacement On Hydro-Gear transmissions, the brake pucks are wearing parts that will need to be serviced fro

RZT-S266. Remove the front mounting bolt, allowing the caliper to swing down. See Figure 4.7.7. The outboard brake puck should fall out when the brake

Brakes and Drive System2714. 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 i

RZT-S28Brake shaft BushingsNOTE: The brake shaft is captive on the deck lift shaft. It is serviced with the deck lift shaft. Refer to the deck lift sh

Brakes and Drive System299. Remove the split spacer from the right side of the deck lift shaft. See Figure 4.13.10. Slide the right split bushing out

RZT-S30Drive beltTo remove/replace the drive belt:NOTE: If a drive belt fails prematurely, find and cor-rect the cause of the failure.1. Remove the de

Brakes and Drive System318. Remove the rear belt guard using a 3/8” wrench. See Figure 4.19.9. Disconnect the harness from the PTO clutch10. Disconne

RZT-S32Drive belt adjustmentThe drive belt is tensioned by a spring loaded idler pulley. When the brakes are applied, the drive belt is de-clutched. A

Brakes and Drive System33Transmission removal/replacementThe Hydro-Gear shop manual for the EZT transmissions is form number BLN-52622. This manual is

IIChapter 6: electrical systemIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

RZT-S34A loss of performance in one transmission can be caused by:1. Rear tires with different circumference or rolling resistance. Air pressure in th

Brakes and Drive System35To remove/replace a transmission:1. Remove the deck as described in Chapter 7: Cutting Decks and Lift Shaft.2. Lift and s

RZT-S368. 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 4.27.9. R

Brakes and Drive System3711. Remove the bowtie clip that secures the bypass rod to the by-pass arm. See Figure 4.30.12. Slide the bypass rod off of th

RZT-S38Hydro neutral control adjustmentNOTE: Neutral control rarely goes out of adjustment on its own. If it needs adjustment, check for damaged linka

Brakes and Drive System393. Disconnect both of the drive control rods from the transmission control arms using a pair of 9/16” wrenches. See Figure 4.

RZT-S407. With the engine still running, locate the socket head cap screw in the slot of the transmission control arm on the transmission that needs t

Brakes and Drive System41Control pedal shaft assemblyNOTE: The control pedal shaft is an assembly of the brake pedal shaft and the drive pedal shaft.

RZT-S428. 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 4.4

Brakes and Drive System4312. Remove the bolt that is pressing against the left con-trol pedal shaft bracket and its nut using a pair of 9/16” wrenches

IIIDiodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Relay . . . . . . . . . . .

RZT-S4416. Disconnect the reverse switch.17. Remove the two screws that hold the right control pedal bracket to the frame using a 1/2” wrench. See

Brakes and Drive System4524. Make sure the pinion gear is installed so that the tim-ing marks on the pinion gear line up with the timing marks on the

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Steering47IntroductionThe steering on the RZT-S mower works in two phases. • First it steers like any other riding mower by turning the front wheels.

RZT-S48Wheel alignment and drive control link adjustmentsThe wheel alignment and drive control link adjustments are performed together on the RZT-S.IM

Steering498. Install the segment gear alignment pins (1/4”). See Figure 5.3. 9. Insert the axle casting (5/16”)

RZT-S5013. Install the speed cam alignment bar. See Figure 5.6.14. Install the control link alignment fixture in the slots of the

Steering51Front wheels Remove/ replace the front wheels:1. Lift and safely support the front end of the riding mower.2. Remove the axle bolt and nut u

RZT-S52To replace the front wheel bearings:1. Lift and safely support the front of the mower.2. Remove the front wheel by following the procedures des

Steering53Front yokes To remove/ replace the front yokes:1 Lift and safely support the front of the mower.2. Remove the front wheel by following the p

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RZT-S54Removal of the steering gearsTo remove the steering gears:1. Remove the floor pan, following the procedures described in Chapter 3: Body.2. Rem

Steering55NOTE: 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 th

RZT-S56Installation and timing of the steering gearsTo install and time the steering gears:1. Install the alignment fixtures and alignment pins by fol

Steering5711. 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 neces

RZT-S58Drag linksTo remove/replace a drag link:1. Remove the floor pan by following the procedures described in Chapter 3: Body.2. Turn the steering w

Steering597. Remove the ball joint ends, counting the number of turns required to remove each ball joint. See Figure 5.27.8. Remove th

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Electrical System61Introduction This chapter is divided into five sections:• Introduction: About this chapter and precautions• Components: This secti

RZT-S62• Symptom: loud “BANG” when key is turned to the OFF position: The after fire solenoid is not closing, either because it is physically damaged

Electrical System63PTO SwitchUnderstanding the PTO switch1. A-COM is in the starter circuit. It is a Normally Closed (NC) set of contacts. Power

Introduction1Professional Shop Manual intentThis Manual is intended to provide service dealers with an introduction to the mechanical aspects of the R

RZT-S64Reverse Safety SwitchThe Reverse Safety Switch is mounted on the right brake pedal shaft support bracket. It is the same part num-ber as the pa

Electrical System65Starter solenoid The starter solenoid is mounted to the rear frame cross member under the seat. See Figure 7.6.• When the prop

RZT-S66Start CircuitTurning the key to the START position:• spins the starter motor• enables the ignition• energizes the afterfire solenoidThe circuit

Electrical System67 Once the starter motor spins, it still needs spark and fuel to run. Looking at the circuits that do that:1. The ignition spar

RZT-S683. 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•

Electrical System69Run Circuit With the key switch in the RUN position, the L terminal sends power to: • the Afterfire Solenoid• t

RZT-S70Engine shut-down circuits Engine shutdown circuits stop the engine by disabling the ignition and removes power from the afterfire solenoid.

Electrical System71Charging circuitHow it works1. When the engine is running, magnets attached to the underside of the flywheel induce AC (Altern

RZT-S725. From the harness connector: See Figure 7.17.5a. The red/white trace wire leads to the 20A fuse.5b. From the fuse, the wire connects to the s

Electrical System734. System check, to identify the problem The system check consists of: • Stator check• Regulator Rectifier check• Downstream check

RZT-S2• Be prepared in case of emergency: Keep a fire extinguisher nearby Keep a first aid kit nearby Keep emerge

RZT-S745d. 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 res

Electrical System757. If the regulator/rectifier fails any one of these tests, replace it with a new one. 8. Check the DC amperage output of the regu

RZT-S76PTO CircuitBasic Operation: See Figure 7.24.1. With the key switch in any position other than OFF, the L terminal supplies power to the winding

Electrical System773. Once the PTO relay is energized by a ground path through one of the safety switches, it latches. See Figure 7.25.3a

RZT-S78Diagnostic TechniquesNOTE: Electrical diagnostic procedures and tools are the same for all Cub Cadet and MTD mowers. This sec-tion is written i

Electrical System79• Low Voltage: Many electronic devices simply stop working if system voltage falls below a given thresh-old. If a 12 volt system i

RZT-S80Ohm’s LawOhm’s Law relates voltage, amperage, and resistance. It states that voltage is the product of resistance times current.• It is written

Electrical System81Kirchhoff’s voltage lawKirchhoff’s voltage law deals with voltage drops. A voltage drop is the amount of voltage used up or “dropp

RZT-S82Types of circuitsThere are three ways a circuit can be wired:•Series• Parallel• Series/parallelSeries Series circuits are wired so that the

Electrical System83Series/parallel Series/parallel circuits have some sections wired in series and some in parallel. See Figure 7.31.What can go

Introduction3AssemblyTorque specifications may be noted in the part of the text that covers assembly, they may also be summarized in tables along with

RZT-S84The ToolsEquipment needed to diagnose an electrical system:• DMM (Digital Multi-Meter)• Wiring schematic or diagramEquipment that may be useful

Electrical System85Digital Multi-meter A DMM is the most useful tool to troubleshoot any electrical system. There is an amazing variety of DMMs o

RZT-S86Wiring diagram or schematic A wiring or a schematic diagram, and the ability to read it, are very important in troubleshooting a circuit. The d

Electrical System87Ammeters and specialized charging system testers Inductive ammeters are available in many forms. Some are as simple as a gauge

RZT-S88BatteriesA fully charged battery that is in good condition is an important factor when trying to diagnose other parts of an electrical system:•

Electrical System89Checking battery conditionThere are three things to do when testing a battery:• Visual inspection• Electrolyte test• Operational t

RZT-S90Battery TestersThere are four major ways to check a battery:• Electrolyte test using a specific gravity tester (hydrometer) to compare the dens

Electrical System91Fixed load testers Fixed load testers (sometimes called toasters) are inex-pensive load testers found at any auto parts store.

RZT-S92Battery discharge test Occasionally a battery will discharge while sitting unused. To test for a battery that is “leaking” voltage:1. Confi

Electrical System93Electrical Troubleshooting1. The first step in troubleshooting is to always verify the complaint. Defining and verifying the probl