Cub-cadet T65 Series Bedienungsanleitung

Professional Shop ManualT65 Series Vertical Shaft EnginesMTD Products Inc. - Product Training and Education DepartmentNOTE: These materials are for us

T65 Series Vertical Shaft Engines4MTD Vertical Engine Model DesignatorsStarter/Alternators 1=Recoil start2=Electric start (12V)3=E. start/alt. 18W4=E.

T65 Series Vertical Shaft Engines94Reassembly1. Clean the cylinder1a. Remove all gasket material from all mating surfaces.1b. Clean the cylinder and s

Crankshaft, piston and connecting rod955d. Tap the piston through the ring compressor into the cylinder using a wooden hammer handle. See Figure 10.25

T65 Series Vertical Shaft Engines967. Install the cam shaft by:7a. Pre-lube the cam shaft with clean 10W-30 motor oil or engine assembly lube.7b. Rota

Crankshaft, piston and connecting rod9711. Install the fuel tank by following the steps described in Chapter 4: Fuel systems and Governor.12. Install

T65 Series Vertical Shaft Engines98Engine specifications chartEngine torque values chartNOTE: * - Apply a small amount of releasable thread locking co

Failure Analysis101A properly maintained engine will provide years of service. Occasionally an engine will fail. An important part of working on engin

T65 Series Vertical Shaft Engines1025. When particles enter the combustion chamber, the up and down motion of the piston grinds the parti-cles against

Failure Analysis1038. Because the oil suspends the particles, the engine components that are immersed in oil will show defi-nite signs of abrasive ing

T65 Series Vertical Shaft Engines104Insufficient lubricationThe bearing surfaces in an engine are not smooth. The machining processes used to make the

Failure Analysis1053. Metal transfer is the primary indicator that the film of oil between two engine parts has been violated. If the damage is lo

Introduction5Model and serial number The model and serial number can be found on a white sticker with a bar code. The sticker is usually located n

T65 Series Vertical Shaft Engines106Engine OverspeedThe MTD engine is designed for a maximum speed of 3300 RPM. When the governor is unable to control

Failure Analysis107Engine OverheatMTD engines are air cooled engines. Because of this, cleanliness of the engine is very important to the life of the

T65 Series Vertical Shaft Engines108Mechanical Breakage/ Wear Sometimes an engine fails because a part breaks. There are generally three causes of

MTD Products Inc - Product Training and Education DepartmentFORM NUMBER - 769-0962412/2013

T65 Series Vertical Shaft Engines6Spark plugs The information in this manual applies to the MTD engine. Some basic principles may apply to engines

Introduction7Air filter The main function of the air filter is to trap air borne par-ticles before they reach the carburetor that can cause cat-a

T65 Series Vertical Shaft Engines8Oil type and capacityThe recommended oil for MTD engines is an SAE 10W-30 oil with an SM API rating or better. The o

Introduction9NOTE: There are two types of dip sticks that can be found on the T series engine; a short threaded dip stick and a quarter turn extended

T65 Series Vertical Shaft Engines10Changing the oilNOTE: If the engine has been running, allow the engine to cool before doing any mainte-nance work.N

Introduction11Fuel systemWhat you should know about fuel.Most of the fuel presently available in North America is oxygenated to some extent. This is c

T65 Series Vertical Shaft Engines12Valve lashValve lash is the clearance between the top of the valve stem and the rocker arm. The valve lash should b

Introduction136. Check valve lash between each valve stem and rocker arm using a feeler gauge. 7. Intake valve lash (top valve) should be 0.004” - 0.0

T65 Series Vertical Shaft Engines14Exhaust systemThe exhaust system is a frequently overlooked component of an engine. It is important to make sure th

Basic Troubleshooting15DefinitionsTroubleshooting - The act of gathering information by preforming tests and direct observations.Diagnosis - Developin

T65 Series Vertical Shaft Engines16IV. Unusual exhaust tone.There are tools that the technician can use in order to define the problem, such as:1. Int

Basic Troubleshooting17Identify factors that could cause the problem This is the second step in the troubleshooting process.1. Crankshaft will not

T65 Series Vertical Shaft Engines18I. Run the engine with a spark tester in-line between the spark plug wire and the spark plug or use an oscilloscope

Basic Troubleshooting19V. Makes unusual smoke when running.a. Black smoke, usually heavy, usually indicates a rich air fuel mixture.• Not enough air:

T65 Series Vertical Shaft Engines20chirping noise.• Confirm with a compression test and leak-down test.e. Unusual exhaust tone.Splashy• Splashy idle

Basic Troubleshooting21Repairing the problemThe third step in the troubleshooting process is to repair the problem. This step consists of:A. Form a di

T65 Series Vertical Shaft Engines22Prime testTo perform a prime test:1. Prime the engine through the carburetor throat using a squirt bottle, filled w

Basic Troubleshooting233. Connect tester to compressed air.4. Adjust the regulator knob until the needle on the gauge is in the yellow or set area of

IChapter 1: IntroductionProfessional Service Manual Intent... 1Safety ...

T65 Series Vertical Shaft Engines24Compression testTo perform a compression test:NOTE: Compression should be in the range of 55 - 85 PSI (3.8 - 5.9 Ba

Basic Troubleshooting25PCV testing The PCV (Positive Crankcase Ventilation) valve is located in the engine block and allows the crankcase pres-sur

T65 Series Vertical Shaft Engines26Troubleshooting flow chartsIgnition TroubleshootingEngine willnot startEngine runserratically or shutsoff, restarts

Basic Troubleshooting27Engine Operation ProblemsExcessive engine loadingOVERHEATSLow oil level or wrong viscosity oilCooling air flow obstructed or cl

T65 Series Vertical Shaft Engines28SURGES OR RUNS UNEVENLYFuel cap vent obstructedDirty carburetor or air filterCarburetor improperly adjustedGoverno

Basic Troubleshooting29ENGINE MISFIRESImproper Valve LashWeak valve springExcessive carbon build upCarburetor improperly adjustedIgnition timing orinc

T65 Series Vertical Shaft Engines30BREATHER PASSING OILOil level too highBreather damaged, dirty orimproperly installedDamaged gaskets, sealsor "

AIR INTAKE SYSTEM31Air filterTo access the air filter:NOTE: The T65 engine comes equipped with either a pleated paper filter or a foam filter. The pro

T65 Series Vertical Shaft Engines32Air Filter HousingTo remove the air filter housing:1. Remove the air filter by following the steps described in the

AIR INTAKE SYSTEM33Carburetor InsulatorTo remove/replace the carburetor insulator:1. Remove the air filter housing by following the previ-ously de

IIChapter 4: The Fuel System and GovernorInspecting the Fuel ...

T65 Series Vertical Shaft Engines342j. Lift the Autochoke Air Vane off of the its pivot.2k. Unhook the choke rod from the carburetor. See Figure 3.8.2

AIR INTAKE SYSTEM35NOTE: The carburetors are not inter-changeable from one engine model to another. To help prevent carbure-tor mix-ups, the Carbureto

T65 Series Vertical Shaft Engines36

FUEL SYSTEM AND GOVERNOR37The function of the fuel system is to store fuel, mix the fuel with air in the correct ratio and deliver it to the intake po

T65 Series Vertical Shaft Engines38Inspecting the fuelNOTE: Fuel is the maintenance item most often overlooked by consumers. A lot of fuel systems pro

FUEL SYSTEM AND GOVERNOR39The fuel filter The fuel filter is located in the fuel tank. It can be removed and cleaned with a can of carburetor cleaner

T65 Series Vertical Shaft Engines40Fuel tank vent The fuel tank vent performs the important task of allow-ing air into the fuel tank. As fuel is b

FUEL SYSTEM AND GOVERNOR41The fuel tankTo remove the fuel tank:1. Drain the fuel out of the fuel tank into an approved container.2. Disconnect the

T65 Series Vertical Shaft Engines42AutochokeThe MTD engine uses a simple autochoke system that is similar to the old style air vane governors. When th

FUEL SYSTEM AND GOVERNOR43To remove/replace the air vane:1. Unplug the spark plug.2. Drain the fuel out of the fuel tank into an approved containe

IIIChapter 8: ExhaustMuffler ...77Chapter 9

T65 Series Vertical Shaft Engines44PrimerAnother way to enrichen the fuel air mixture for start-up is the primer. The primer is a simple pump that pre

FUEL SYSTEM AND GOVERNOR453. Squeeze the two sets of tabs together and push the primer out of the housing. See Figure 4.18.4. Install the primer by fo

T65 Series Vertical Shaft Engines46Disassembly and rebuilding the carburetor1. Clamp off the fuel line to prevent fuel spillage and remove it.2. Remov

FUEL SYSTEM AND GOVERNOR47NOTE: The float is not adjustable. Spring tension against the float valve begins to build from the horizontal position, putt

T65 Series Vertical Shaft Engines48NOTE: Fuel enters the central column through a port about 1/2” (1cm) from the bottom, to help prevent the ingress o

FUEL SYSTEM AND GOVERNOR498. Examine the metering plug: See Figure 4.28.• Fuel, drawn from the central column via the long fuel feed leg, is metered b

T65 Series Vertical Shaft Engines50NOTE: For mower applications, the idle speed is not normally critical because the operator is not provided with a t

FUEL SYSTEM AND GOVERNOR51Governor The engine speed is controlled by a balance between the force applied by a spring (pulling the throttle open) a

T65 Series Vertical Shaft Engines52Governor shaftTo remove or replace the governor shaft:1. Remove the engine from the unit.2. Remove the governor arm

FUEL SYSTEM AND GOVERNOR537. Slide the governor shaft through the engine block from the inside of the engine.8. Carefully slide a new seal over the go

IV

T65 Series Vertical Shaft Engines54Governor cup and the governor gear1. Remove the engine from the unit.2. Remove the sump by following the steps desc

Lubrication55Oil type and quantityThe recommended oil for MTD engines is an SAE 10W-30 oil with an SM API rating or better. The oil capacity is 17.0-

T65 Series Vertical Shaft Engines56Oil dipstickNOTE: There are two types of dip sticks that can be found on MTD engines; a threaded dip stick that was

Lubrication57Dipstick tube removalSome MTD engines come with a dip stick tube, depending on the application. See Figure 5.4.To remove/replace the dip

T65 Series Vertical Shaft Engines58Lubrication systemMTD uses a splash lube system for it’s vertical shaft engines. The governor gear has paddles on i

Lubrication59PCV The function and test procedures for the PCV is cov-ered in Chapter 2: Basic Troubleshooting.To service the PCV:NOTE: If the en

T65 Series Vertical Shaft Engines605. Inspect the oil drain-back port. Make sure it will allow oil to drain back into the engine. See Figure 5.12.6.

Starters61Recoil Starter Removal To remove the recoil assembly from the engine:1. If the engine is installed on a mower, loosen the wing-nut that

T65 Series Vertical Shaft Engines62Starter Rope The most common failure mode for most recoil assem-blies is a broken rope. See Figure 6.2. NOTE:

Starters63NOTE: If starter rope tension needs to be adjusted, there is room between the recoil housing and the pulley to wind-on more tension. See Fig

Introduction1Professional Service Manual Intent This manual is intended to provide service dealers with an introduction to proven diagnostic and repai

T65 Series Vertical Shaft Engines64Starter pulley and recoil spring The recoil spring is nested within the starter pulley and both parts are assem

Starters65NOTE: Beneath the pressure plate is a compression spring, and two starter pawls that are held in the disengaged position by two torsion spri

T65 Series Vertical Shaft Engines66NOTE: The rolled end of the pawl fits in the recess in the starter pulley. The hooked end engages the starter cup.

Ignition System67Troubleshooting the ignition system The purpose of the Ignition System is to provide a spark in the combustion chamber at the pro

T65 Series Vertical Shaft Engines68Troubleshooting the Stop SwitchTo access the stop switch:1. Drain the fuel out of the fuel tank into an approved co

Ignition System69Troubleshooting the Module• Normal performance of the coil is to produce at least 10,000 volts at starter-rope pull-through speed. Se

T65 Series Vertical Shaft Engines70• At pull-over speed (~ 600 RPM), voltage should be at least 10,000V. See Figure 7.8. NOTE: Flash-over voltage will

Ignition System71 NOTE: Intermittent failure requires tests for voltage and resistance to be made when the engine is cold, and again when it is hot. T

T65 Series Vertical Shaft Engines72About the spark plug• The Spark Plug is a F5RTC, part #951-14437, gapped to 0.024” - 0.031” (0.6 - 0.8 mm).• Wear

Ignition System73Ignition Module To removal an Ignition Module:1. Unplug the spark plug.2. Drain the fuel out of the fuel tank into an approved co

T65 Series Vertical Shaft Engines2• Be prepared in case of emergency: Keep a fire extinguisher nearby Keep a first aid kit ne

T65 Series Vertical Shaft Engines74Engine brake and stop switch (if equipped)The stop switch and brake (for lawn mower applications) must be able to s

Ignition System75FlywheelTo remove the flywheel:1. Unplug the spark plug.2. Drain the fuel out of the fuel tank into an approved container.3. Disc

T65 Series Vertical Shaft Engines769. Inspect the key, keyway, and tapered mating sur-faces of the flywheel and crankshaft. See Figure 7.21.NOTE: If

Exhaust77MufflerThe exhaust system is a frequently overlooked component of an engine. It is important to make sure the muffler is in good condition an

T65 Series Vertical Shaft Engines7810. Slide the muffler off of the studs. See Figure 8.3.NOTE: The exhaust gasket is made of a graphite material. It

Cylinder head79Cylinder HeadThe Cylinder head of the MTD engine can be removed without removing the engine from the application.To remove the cylinder

T65 Series Vertical Shaft Engines809. Loosen the jam nuts and fulcrum nuts that secure the rocker arms using a 10mm wrench and a 14mm wrench. See Figu

Cylinder head8115. Position the cylinder head on the engine block.16. Install the 4 head bolts, and tighten them to a step torque of 21 - 22 ft lbs (2

T65 Series Vertical Shaft Engines82ValvesValves and valve parts, like springs and keepers, are not available as service parts. The valves and valve se

Cylinder head835. Inspect the valve seat. See Figure 9.9.• Valve seats are 45 degrees, with a 15 degree top-ping cut and a 75 degree narrowing cut.• S

Introduction3Fasteners• Most of the fasteners used on the MTD engine are metric. Some are fractional inches. For this reason, wrench sizes are frequen

T65 Series Vertical Shaft Engines84

Crankshaft, piston and connecting rod85There are a a few different paths that can be followed when disassembling an engine. This chapter will cover th

T65 Series Vertical Shaft Engines86NOTE: The thrust washer should be removed when the sump is removed.11. Remove the camshaft. See Figure 10.2.NOTE: A

Crankshaft, piston and connecting rod87NOTE: Rotating the crankshaft after the connecting rod bolts are removed will help to separate the con-necting

T65 Series Vertical Shaft Engines88Crankshaft inspection1. Inspect the crankshaft journals for galling, scoring, pitting or any other form of damage.2

Crankshaft, piston and connecting rod89Piston Inspection1. Clean the piston and remove all carbon from the rings and ring groves.2. Insert one rin

T65 Series Vertical Shaft Engines90NOTE: The piston ring end gaps need to be stag-gered 90o apart. See Figure 10.14.6. Measure the distance between th

Crankshaft, piston and connecting rod91Connecting rod inspection1. Inspect the connecting rod for cracks or any signs of damage.2. Install the rod

T65 Series Vertical Shaft Engines92Cylinder inspection1. Clean and inspect the cylinder, inside and out. NOTE: If there is any sign of damage, especia

Crankshaft, piston and connecting rod93Bearings There are two bearings to inspect; a plain bearing in the sump and a plain bearing in the cylinder