Cub Cadet RZT-S User Manual
Professional Shop Manual
RZT-S
NOTE: These materials are for use by trained technicians who are experi enced in the service and repair of outdo or power
equipment of the kind described in this publication, and are not intende d for use by untrained or in experienced indi viduals.
These materials are intended to provide supplemental information to assist the trained technician. Untrained or inexperienced individuals should seek the assistance of an experie nced and trained professio nal. Read, understand, and follow all
instructions and use common sense when working on powe r e quip ment. T his includes the contents of the product’s Operators 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 accura te as possible at the time of publ ication. 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
Table of Contents
Chapter 1: Introduction
Professional Shop Manual intent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Description of the RZT-S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Model and Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2: Engine related parts
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fuel tank removal/replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fuel pick up tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fuel Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Evaporative (EVAP) emissions system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Roll over valve vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Control cable adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 3: Body
Floor pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Left fender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Right fender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Seat box assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chapter 4: Brake and Drive System
Brake system description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Brake adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Brake puck/rotor replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Brake shaft Bushings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Drive belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Drive belt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Hydro neutral control adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Control pedal shaft assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Chapter 5: Steering
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Wheel alignment and drive control link adjustments . . . . . . . . . . . . . . . . . . . 48
Front wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Front yokes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Removal of the steering gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Drag links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
I
Chapter 6: electrical system
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
PTO Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Brake Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Reverse Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Seat Safety Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Starter solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
PTO Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Start Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Run Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Engine shut-down circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Charging circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
PTO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Diagnostic Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Electrical environment: AC Vs. DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Ohm’s Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Kirchhoff’s current law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Kirchhoff’s voltage law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
How the system is wired together . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Types of circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Series/parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Shorts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Opens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Increased resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
The Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Digital Multi-meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Wiring diagram or schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Fused jumper wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Test lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Self-powered continuity lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Ammeters and specialized charging system testers . . . . . . . . . . . . . . . . . . . .87
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Charging the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Checking battery condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Battery Testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Adjustable load testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Fixed load testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Conductance testers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Battery discharge test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Storage of batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Electrical Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Voltage Drop Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Testing switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
II
Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Chapter 7: Decks and lift shaft
Cutting decks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Cleaning the deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
To clean the deck while it is removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Deck belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Idler pulleys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Spindle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Spindle removal/installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Spindle overhaul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Leveling the deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Front To Rear (pitch) Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Deck Gauge Wheel Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Deck lift shaft assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Chapter 8: Maintenance intervals
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Engine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
The spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Oil change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Servicing the fuel system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Clean the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Transmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
III
IV
Introduction
CHAPTER 1: INTRODUCTION
Professional Shop Manual intent
This Manual is intended to provide service dealers with an introduction to the mechanical aspects of the RZT-S
zero-turn mower.
• Detailed service information about the engine will be provided by the engine manufacturer, in most cases.
Disclaimer: The information contained in this manual is correct at the time of writing. Both the product and the information 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 pro cedure, bu t doe s not fit as a step in the pr ocedure.
• Bullet points: indicate sub-steps or points.
! CA UTION! CA UTION
! WA RNI NG! WA RNI NG
! DANGER! DANGER
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 procedures described in the text.
• If the person using this manual is uncomfortable with any procedures they encounter, they sh ould seek
the help of a qualified technician or Cub Cadet Technical Support.
Fasteners
Caution is used to point out potential danger to the technician, operator, bystanders, or surrounding property.
Warning indicates a potentially hazardous situation that, if not avoi ded, could result in death of
serious injury.
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.
• Most of the fasteners used on these mowers ar e sized in fraction al inches. The engine and transmissions
are metric. For this reason, wrench sizes are frequently identified in the text, and measur ements are given
in U.S. and metric scales.
• If a fastener has a locking feature th at has worn, replace the fastener or apply a small amount of releasable 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.
1
RZT-S
! CAUTION! CAUTION
• 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.
• Grooming and attire:
! WARNING! WARNING
! CAUTION! CAUTION
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
• 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.
! DANGER! DANGER
2
• 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.
• Exhaust fumes from running engines contain carbon monoxide (CO). Carbon
monoxide is a colorless odorless gas that is fatal if inhaled in sufficient quantity.
Only run engines in well ventilated areas. If running engines indoors, use an
exhaust evacuation system with adequate make-up air ventilated into the shop.
Introduction
Assembly
Torque specifications may be noted in the part of the text that covers assembly, they may also be summarized 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-reference guide as well as a step-bystep 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 dis-assembly/reassembly,
and by the potential for 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.
Description of the RZT-S
Figure 1.1
The RZT-S combines a traditional RZT lap bar zero turn
rider (ZTR) with Cub Cadet’s patented Syncro Steer
TM
technology.
The magic of the system: variable ratio steering gears
that turn the front wheels much further than conventional
systems. The steering control is linked to the traction drive
system control.
The traction drive system synchronizes the steering
angle of the front tires with the speed and direction of rot ation of the rear tires.
A true zero-turn maneuver is achieved when the operator turns the steering wheel far enough that the inside rear
wheel spins in reverse just like a traditional lap-bar controlled ZTR.
3
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. See Figure 1.2.
Figure 1.2
The model number is 17WF2BDS055. The break down of what the number mean is as follows:
1 .............................................................................................. Residential machine
....7 .......................................................................................... Residential zero turn mower
.......W..... ... ... .... ... .......................................... .......................... Returnable crate
...........F................................................ ... .... ... ... ... .................... Engine code
.............2. ................................................................................ Frame
.................B............................................................................. Transmission (B = EZT, G = ZT2800)
....................D.......................................................................... Style series
.........................S..................................................................... Deck (S = 42”, T = 46”, P=50”)
.............................056 ............................................................. Customer number
The serial number is 1B142H20124. The serial number reads as follows:
1 .............................................................................................. Engineering level
..B............................................................................................ Month of production (B = February)
.....14 ....................................................................................... Day of the month
.........2 ..................................................................................... Last digit of the year
...........H.................................. ... .... .......................................... Plant it was built in (Martin, TN)
..............2 ................................................................................ Assembly line number
.................0124 ....................................................................... Number of unit built
4
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.
Muffler
Remove the muffler by following these steps:
Bumper
Screws
Figure 2.1
exhaust screws
1. Remove the four screws (two on each side) that hold
the rear bumper in place using a 1/2” wrench.
See Figure 2.1.
2. Slide the bumper out from between the frame, the
fuel tank bracket on the right and utility bin bracket on
the left.
NOTE: The muffler guard will come off with the bumper.
3. Remove the two screws that hold each exhaust pipe
to the cylinder head using a T-27 torx driver .
See Figure 2.2.
4. Remove the muffler and exhaust pipes.
NOTE: The exhaust pipes are welded to the muffler. The
pipes and the muffler are serviced as one assembly.
Figure 2.2
Exhaust pipe
5. Clean and remove all gasket material from the cylinder head (and the exhaust pipe if they are being
reused).
6. Using new gaskets, install the muffler by following the
previous steps in reverse order.
NOTE: Tighten the exhaust screws to a torque of 150 in
lbs (17Nm).
NOTE: When installing the bumper, start all four screws
before tightening them. Otherwise the bumper will
bind and the holes will not line up.
7. Test drive the mower in a safe area before returning it
to service.
IMPORTANT: Do not put a mower with an exhaust leak
back in service.
5
RZT-S
Fuel System
Fuel tank removal/replacement
Remove/replace the fuel tank by following these steps:
Gasoline and its vapors are
! CAUTION! CAUTION
the fuel system.
1. Remove the left fender:
1a. Remove the two screws, indicated by the
arrows in Figure 2.3, from the underside of the
fender using a 3/8” wrench.
NOTE: The left rear wheel was removed for a clear
view of the screws.
extremely flammable. Use common sense when working around
Figure 2.3
1b. Remove the two screws, indicated by the
arrows in Figure 2.4, from the inboard side of
the fender using a T-27 torx driver.
Figure 2.4
6
Engine Related Parts
1c. Remove the screw from the front of the fender
using a T-27 torx driver. See Fi gure 2.5.
Vent hose
Roll over valve
Figure 2.5
Fuel line
Screw
1d. Unscrew the fuel cap.
NOTE: The fuel cap is tethered to the fender. This is an
EPA tier III requirement.
1e. Lift the fender off of the mower.
2. Clamp off the fuel line between the fuel tank and the
fuel filter. See Figure 2.6.
3. Disconnect the fuel line from the fuel tank at the fuel
filter.
4. Disconnect the fuel tank vent line from the roll over
valve.
5. Lift the fuel tank off of the mower.
6. Drain the fuel into an approved container.
7. Install the fuel tank by reversing previous steps.
Figure 2.6
8. Test drive the mower in a safe area before returning
it to service.
7
RZT-S
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.
NOTE: A loose or missing pick up tube will allow air into the fuel system and will reduce or prevent fuel follow
from the fuel tank to the engine.
To remove/replace the pick up tube:
1. Remove the left fender by following the procedures
described in Chapter 3: Body.
2. Clamp off the fuel line between the fuel tank and the
fuel filter. See Figure 2.7.
3. Disconnect the fuel line from the pick up tube.
4. Gently pry the pick up tube and grommet out of the
fuel tank. See Figure 2.8.
5. Inspect the grommet.
NOTE: If the grommet is cracked or damaged,
replace as needed.
Pick up tube
Fuel line
Figure 2.7
Grommet
Figure 2.8
8
Engine Related Parts
Fitting
Fuel Line
Grommet
pick up tube
Figure 2.9
NBR intermediate layer
NBR inner liner
6. 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 grommet in the fuel tank.
8. Insert the pick up tube into the fuel tank, through the
grommet.
9. Re-connect the fuel line.
10. Install the left fender.
11. Test run the mower in a safe area before returning it
to service.
The fuel line used by Cub Cadet is GREENbar
TM
. This
is a multi-layer fuel line that meets the current EPA guidelines.
CSM Cover
Picture courtesy of Avon Automotive
Reinforcement
Figure 2.10
THV barrier layer
NOTE: This fuel line has a thin inner liner. If a tear forms in
this inner liner, fuel can get between the liner and
the hose. This will cause the liner to collapse, cutting off the fuel flow.
NOTE: Replace the fuel line only with GREENbar
TM
700
series fuel line.
9
RZT-S
%NGINE
%NGINE
#HARCOAL
CANISTER
6ENT
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. Some of the requirements of tier III emissions include:
• Tethered fuel caps.
• Unvented fuel caps.
• Low permeation (GREENbar
• Roll over valve vents
The fuel tank has an unvented fuel cap. The fuel tank
vents through the roll over valve. The vapors will flow
through the vent hose (black hose with a red trace) to the
engine. See Figure 2.11.
The EVAP system, from the fuel tank up to the engine
connector, is a Cub Cadet system, meaning warranty and
parts are handled by Cub Cadet.
The engine side of the system varies by engine manufacturer, but on most engines the vent hose will go to the
air intake manifold.
TM
) fuel line
Roll over valve
Fuel tank
Fuel pick up tube
49 state fuel system
Figure 2.11
Fuel cap
NOTE: Units sold in California will have a charcoal
canister to further reduce the amount of
emissions that escape from the fuel system.
The fuel tank will vent through the charcoal
canister. The charcoal in the canister will act
as a filter and remove some of the vapors
that are venting out of the fuel tank.
A second vent hose connects the canister to
the engine. As the engine runs, the vacuum
in the intake manifold will draw the vapors
out of the charcoal, recharging it.
See Figure 2.12.
NOTE: A leak in the vent hose will allow dirt injec-
tion in the engine. This will not affect engine
performance until the dirt ingestion has
cause damage inside the engine.
California fuel system
Figure 2.12
10
Engine Related Parts
T roubleshooting
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).
A blockage in the line between the charcoal canister (if
equipped) and the intake manifold.
Engine runs lean Wrong fuel cap installed.
Leak in the vacuum lines.
Gasoline vapor escaping from
the engine
The charcoal canister (if equipped) is saturated.
A blockage in the line between the charcoal canister (if
equipped) and the intake manifold.
Wrong fuel cap installed.
Leak in the vacuum lines.
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RZT-S
Roll over valve vent
To remove the roll over valve:
1. Remove the left fender by following the procedures
described in Chapter 3: Body.
2. Disconnect the vent hose. See Figure 2.13.
NOTE: The vent hose will have a red trace.
3. Gently pry the roll over valve out of the fuel tank.
See Figure 2.14.
4. Inspect the rubber grommet, replace if damaged.
Vent hose
Red trace
Figure 2.13
Roll over valve
To install the roll over valve:
1. With the grommet on the roll over valve, install the
roll over valve by pressing it into the opening in the
tank.
2. Install the vacuum line.
3. Install the left fender.
4. Test run the engine in a safe area before returning
to service.
Figure 2.14
12
Testing the roll over valve
15 in.Hg.
Figure 2.15
Engine Related Parts
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.
Test the roll over valve by:
1. Remove the roll over valve by following the steps previously described in this section.
2. Connect a vacuum pump to the roll over valve.
3. Hold the roll over valve in an inverted position.
4. Apply a vacuum to the roll over valve.
See Figure 2.15.
NOTE: The roll over valve should hold 15 in.Hg. for 15
seconds.
Zero reading
Figure 2.16
5. With the vacuum still applied, turn the roll over valve
over. See Figure 2.16.
NOTE: The vacuum should be relieved.
6. If the results do not match what is listed above,
replace the roll over valve.
13
RZT-S
Control cable adjustment
To adjust the control cable:
1. Move the throttle lever to the detent between the full
throttle and the choke position.
2. Loosen the clamp that holds the control cable jacket
in position. See Figure 2.17.
3. Slide the cable jacket until the speed control lever
makes contact with the choke lever.
4. Tighten the control cable jacket.
5. Move the throttle lever to the choke position.
6. Verify that the choke is fully closed.
7. Test run the mower in a safe area before returning it
to service.
Choke lever
Contact point
Speed control lever
Control cable clamp
Figure 2.17
14
Floor pan
Body
CHAPTER 3: BODY
To remove/replace the floor pan:
1. 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.
1c. Remove the screw and washer that secures the
steering wheel to the steering shaft using a 1/2”
wrench. See Figure 3.1.
1d. Lift the steering wheel off of the steering shaft.
Figure 3.1
Brake pedal
Pedal shaft bell crank
Figure 3.2
2. Remove the brake pedal: See Figure 3.2.
2a. Remove the screw that secures the brake pedal
to the pedal shaft bell crank using a 1/2”
wrench.
2b. Unhook the brake pedal from the bell crank.
15
Z-Force-S
3. 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.
Reverse pedal
Figure 3.3
4a. Remove the screw that secures the drive
pedal to the pedal shaft bell crank using a 1 /2”
wrench.
4b. Unhook the drive pedal from the bell crank.
5. Remove the lower steering column cover by removing the two screws, indicated by the arrows in Figure 3.4, using a T-30 torx driver.
6. Remove the nine screws that hold the floor pan to
the frame using a T-30 torx driver.
7. Lift the floor pan off of the mower.
Forward drive pedal
Figure 3.4
8. Install the floor pan by reversing the previous steps.
NOTE: Confirm that all safety and control feat ur es
work correctly. Do Not return an unsafe
mower to service.
16
Figure 3.5
Left fender
Figure 3.6
Body
To remove/replace the left fender:
NOTE: The fuel tank is nested inside the left fender.
Gasoline and its vapors are
! CA UTION! CA UTION
the fuel system.
1. Remove the two screws, indicated by the arrows in
Figure 3.6, from the underside of the fender using a
3/8” wrench.
NOTE: The left rear wheel was removed for a clear view of
the screws.
2. Remove the two screws, indicated by the arrows in
Figure 3.7, from the inboard side of the fender using
a T-27 torx driver.
extremely flammable. Use common sense when working around
Figure 3.7
Figure 3.8
3. Remove the screw from the front of the fender using
a T-27 torx driver. See Figure 3.8.
4. Unscrew the fuel cap.
Screw
NOTE: The fuel cap is tethered to the fender. This is an
EPA tier III requirement.
5. Lift the fender off of the mower.
6. Install the fender by following the previous steps in
reverse order.
NOTE: Confirm that all safety and control features work
correctly. Do Not return an unsafe mower to service.
17
Z-Force-S
Right fender
To remove/replace the right fender:
1. Remove the yellow throttle lever using a #1 phillips
screwdriver. See Figure 3.9.
2. Disconnect the throttle lever assembly from the right
fender using a T-30 torx driver. See Fig ure 3.9.
Figure 3.9
3. Remove the two screws, indicated by the ar ro ws in
Figure 3.10, from the inboard side of the fender
using a T-27 tor x driver.
4. Remove the screw from the front of the fender using
a T-27 torx driver. See Figure 3.11.
5. Remove the deck lift lever grip.
Figure 3.10
Screw
18
Figure 3.11
6. Disconnect the key switch. See Figure 3.12.
Body
Key switch
PTO switch
Figure 3.12
Hour meter
7. Disconnect the hour meter.
8. Disconnect the PTO switch.
9. Remove the two screws from the underside of the
right fender using a 3/8” wrench. See Figure 3.13.
10. Lift the fender off of the mower.
11. Install the fender by following the previous steps in
reverse order.
Figure 3.13
12. Test drive the mower in a safe area before returning
it to service.
NOTE: Confirm that all safety and control features work
correctly. Do Not return an unsafe mower to service.
19
Z-Force-S
Seat box assembly
To remove/replace the seat box assembly:
1. Remove the battery.
2. Remove the deck by following the procedures
described in Chapter 7: Decks and Lift Shaft.
3. Remove the left fender by following the procedures
described in the left fender section of this chapter.
4. Remove the right fender by following the procedures described in the right fender section of this
chapter
5. Disconnect the harness from the seat switch.
6. Remove the two screws securing the seat frame to
the seat box using a 1/2” wrench. See Figure 3.14.
7. Remove both of the seat springs using a 1/2”
wrench. See Figure 3.15.
8. Remove the seat box cover using a 1/2” wrench.
Harness
Screws
Figure 3.14
Seat springs
9. Remove the two screws that hold the deck lift indexing bracket to the seat box using a 1/2” wrench.
See Figure 3.16.
20
Figure 3.15
Screws
Figure 3.16
Screws
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.
Figure 3.17
Cross member screw
Seat box screws
1 1. Remove the four screws (two on each side), that hold
the seat box to the frame using a 1/2” wrench.
See Figure 3.18.
12. Remove the two screws (one on each side), that hold
the cross member to the frame
NOTE: The cross member can be left in place.
Figure 3.18
13. Remove the three pan head screws indicated by the
arrows in Figure 3.19, that hold the front of the seat
box to the frame using a T-30 torx driver.
14. Fish the wiring harness out of the seat box.
Figure 3.19
15. Lift the seat box assembly off of the mower.
16. Install the seat box by reversing the previous steps.
17. Test drive the mower in a safe area before returning
it to service.
NOTE: Confirm that all safety and control features work
correctly. Do Not return an unsafe mower to service.
21
Z-Force-S
22
Brakes and Drive System
CHAPTER 4: BRAKE AND DRIVE SYSTEM
Brake system description
The RZT-S uses twin EZT Hydro-Gear transmissions to drive the rear wheels. The hydraulic acti on of the transmissions 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.
Main brake
control rod
Brake pedal
Figure 4.1
Brake shaft
• There is a brake for each transmission.
• They are activated by depressing the brake pedal.
• Depressing the brake pedal will cause the control
pedal shaft to rotate. When the shaft rotates, a bell
crank attached to it will pull on the main brake control rod. See Figure 4.1.
• The main brake rod will pull on a bell crank
attached to the brake shaft. This will cause the
brake shaft to rotate.
NOTE: The brake shaft is held 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.
Main brake
control rod
Secondary brake rods
Figure 4.2
De-clutching rod
• As the brake shaft rotates, the two bell cranks will
pull the secondary brake rods. The secondary
brake rods will pull on the brake caliper arm, pushing the brake pins into the caliper, applying the
brakes. See Figure 4.2.
• A brake link rod connects the right brake shaft bell
crank to the drive belt idler pulley bracket. When
the brakes are applied, this link rod pulls on the
idler pulley bracket, de-clutching the drive belt.
23
RZT-S
Brake adjustment
NOTE: When performing a brake adjustment, inspect the brake components for signs of wear or damage.
1. Block the front wheels.
2. Lift and safely support the rear of the mower.
NOTE: Make sure the parking brake is released.
3. Remove the cotter pin locking the castle nut on the
brake caliper. See Figure 4.3.
4. Back the castle nut off a few turns using a 9/16”
wrench.
NOTE: Even if the brakes are set to the correct
clearance, inserting a feeler gauge between
the rotor and the brake puck can be very difficult. Loosen the castle nut first, then insert
the feeler gauge and tighten the nut to set
the proper clearances
Castellated nut
Figure 4.3
Cotter pin
5. Insert a 0.030” (0.8 mm) feeler gauge between the
brake rotor and the outboard brake puck.
See Figure 4.4.
NOTE: The tolerance for the brake clearan ce is
0.020” - 0.040” (0.5 - 1.0mm). The 0.030
feeler gauge will set the clearance at the
midpoint.
6. Tighten the nut un til there is slig ht drag on the feeler
gauge.
NOTE: For even braking, both sides should be set
to the same clearance.
7. Install a new cotter pin.
8. Repeat same procedure on the other side.
9. Take the mower off of the jack stands.
10. Open the bypass valves and check the parking brake before returning the mower to service.
• With the brakes released, the mower should have onl y hydraulic drag when it is pushed.
• With the brakes engaged, the wheels should slide before they rotate when the mower is pushed.
11. Test drive the mower in a safe area before returning it to service.
NOTE: Check all safety and control features. Do Not return an unsafe mower to service.
Figure 4.4
0.030” feeler
gauge
24
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