Kubota WG750 Parts - New and Aftermarket

The Kubota WG750 engine is a vertical, liquid cooled, 4cycle, 3 cylinder overhead valve gasoline engine, with a rated engine speed of 3600 rpm. Its displacement is 45.21 / 740 ( cu in / cc ). Its dimensions are width 15.4 in, Height 18.7 in, Length 16.6 in, with a dry weight of approx 136 lbs.

The main parts of the WG750 engine that may need replacing at some time are listed below. They may need replacing either through some type of mechanical breakdown or damage, or simply as part of routine maintenance over a period of time.

With all Kubota Engines it is important to check what emission regulation thet comply with, normally either Tier 4 or Tier 2. It is also important to check its intake system – many are naturally aspirated.

Parts can normally be obtained either from Kubota itself, or from a third party supplier.

Kubota engines can be used in many different types of machinery and vehicles, ranging from tractors to air compressors, excavators, saw mills, water pumps, zero turn mowers, sea weed harvesters, trenchers, wheel loaders, generators etc.

Many of them are also compatable with tractors and machinery made by other manufacturers.

The Kubota WG750 engine is one of the most powerful engines Kubota has ever built, and has a strong reputation for both its power and effeciency.

Replacement parts made by another manufacturer are normally referred to as aftermarket parts. Aftermarket parts should perform the same function as a standard manufacturer part, but will normally be cheaper.

If the Kubota WG750 is still under warranty, then it is likely to be part of the warranty conditions that manufacturer parts are used. A number of people also prefer manufacturer parts because there are specifically designed to be used with the appropriate tractor.

Below is a breakdown of the main areas and categories of parts used in most Kubota engines, tractors and agricultural machinery. It is really important to check the specific item needed prior to purchase, especially if bought online

All measurements listed below are approximate and should be checked with the manufacturer /dealer or manual before any purchase is made or any repairs undertaken.

Kubota WG750 Manual PDF

The operator and service manual for the Kubota WG750, sometimes referred to as a workshop manual is most easily accessed as a PDF document, and can be downloaded either from the main Kubota website, or from a number of other websites online, either as a free download or normally at a minimal cost

The manual is a crucial document in terms of advising both how to disassemble and service the engine in a safe and efficient way, and at the same time keeping all its operating parts running smoothly and effectively as possible

The Kubota parts diagrams that are part of the manual are important in helping anyone to fit or repair a replacement part, either as part of a routine service, or because the part has become defective.

The Kubota WG750 PDF manual has a number of sections, which would normally cover the mechanism and servicing and disassembling areas of operation.

Mechanism

Engine Body

cylinder block
cylinder head
crankshaft
system and piston rings
connecting rod
camshaft
flywheel
rocker arm

Lubricating System

general
oil pump
relief valve
oil filter cartridge
oil pressure switch

Cooling System

general
waterpump
thermostat
radiator
radiator cap

Intake/Exhaust system

air cleaner
muffler

Fuel system

general
injection pump
injection nozzle
fuel filter
fuel lift pump
governor

Electrical system

electrical charging system

Disassembling and Servicing

General

engine identification
general precautions
tightening torques
troubleshooting
servicing specifications
maintenance checklist
check and maintenance
special tools

Engine Body

checking and adjusting
disassembling and assembling
draining water and oil
external components
cylinder head and fouls
gear case
piston and connecting rod
flywheel and crankshaft servicing
cylinder head
climbing gear and camshaft
piston and connecting rod
crankshaft
cylinder bore

Lubricating System

checking
servicing
oil pump

Cooling System

checking
fan belt
radiator
dassembling and assembling

Fuel system

checking and adjusting
injection pump
injection nozzle
disassembling and assembling
injection pump
injection nozzle

Electrical system

checking
starter
glow plug
alternator and regulator
disassembling and asessembling
starter
alternator
servicing
starter
alternator

It is always a good idea to do a pre-operation check, to see if there are any signs of problems that could indicate parts needing to be replaced. Some inspections include checking to see if there are any parts which have had problems in previous operations.

Walk around the engine to see if there are any oil or water leaks, checking the engine oil level and the amount of fuel. Check the amount of coolant in the engine and seeing if there is any dust in the air cleaner dust cup. It is also a good idea to check if there are any damaged parts or any loosened bolts or nuts.

When starting the engine, it is a good idea to check the colour of the exhaust fumes, and listen to see if there is any unusual engine noise which could give an indication of some malfunction inside it.

Kubota also give a detailed breakdown how often various parts should be checked to see if they need replacing or cleaning. This is indicated by how many hours the engine has been running for. As an example, for most engines it is recommended that every 200 hours the engine oil is changed, and the intake airline is checked.

Every 3000 hours, it is recommended to check the turbocharger, check the injection pump and check the fuel injection timer.Every two years it is recommended to change the radiator coolant, to change or replace radiator hoses and clamp bands, to replace fuel pipes and replace the intake air line.

For full details please refer to the service owners manual.

The Kubota engine WG750 series repairs, servicing and maintenance are often done in collaboration with different Kubota tractors, whose main parts are listed below.

Kubota WG750 Engine Parts

Intake manifold

Speed control lever

Engine stop lever

Injection pump

Fuel feed pump

Cooling fan

Fan drive pulley

Oil filter cartridge

Water drain cock

Oil filter plug

Exhaust manifold

Alternator

Starter

Oil level gauge

Oil pressure switch

Flywheel

Oil drain plug

Oil pan

Kubota WG750 Parts – Injection Pump

This engine has a unique injection system pioneered by Kubota. What it does in effect is to provide a high level of power output, that is combined with a torque backup.

In addition, the way the pistons are designed and coated means that the valves vibrate less than in a lot of comparable diesel engines, meaning that there is generally much less noise from the engine that would otherwise be.

The issue of noise can be a significant factor in any engine that is running for a long period of time continuously, especially if it is in a confined area.

The Kubota WG750 uses a unique casting technology made by Kubota that gives the engine a high level of protection against the heat generated by the power of the engine.

This gives the engine an increased level of reliability, as well as high level of endurance.

Its design also gives it a way of starting quickly in cold weather, which is not only convenient, but in many ways can also be hugely beneficial in terms of productivity and work performance..

Kubota WG750 specs and parts

It is important to check the specification of the WG750 engine before underatking any work on it – the main areas to look at are listed below

Number of cylinders

Displacement

Combustion System

Intake system

Cooling System

Dry Weight

Horsepower

Speed

Starting System

Various options such as shallow oil pan and horizontal water outlet are available to reduce engine height.

Kubota WG750 – Main Compnents and Parts

Block

Head

Crankshaft

Camshaft

Cheers

Pistons

Rods

Flywheel/housing

Oil pump

Governor

Intake manifold

Oil pan

Tractor / Engine Parts

As above, Kubota engines are used in a wide range of machinery and equipment, and parts are often used in conjunction with other repair or servicing work. Listed below are some of the main types of other Kubota parts used.

Kubota WG750 parts -3 Point Linkage / Drawbar/ Hitch –

Lift Rod LH
Lift Rod RH
Lower link
PTO shaft protector
Stabiliser
Swinging drawbar
Top link
Top link bracket

Kubota WG750 parts – Air Conditioner

Air conditioning duct
Air conditioner hose
Compressor
Condenser
Dashboard air outlets
Heater hose
Inner air recirculation
Mode case

Kubota Accessories and Service parts

Brake parts

Brake
Brake pedal
Brake rod
Parking brake lever

Cabin Parts

Cab Bracket front
Cab Bracket rear
Cab Frame
Door LH
Doorlock LH
Door lock RH
Sender
Fender cover
Floor mat
Front glass
Hood rear
Inner roof
Near window
Rear view mirror
Seat
Side window
Toolbox

Canopy

Cargo and Storage Accessories

Chassis parts

Clutch parts

Center frame
Bevel gear
Clutch release fork
Clutch rod
Differential rear
Driveshaft
First shaft
Input shaft
PTO clutch
PTO clutch valve
PTO propellor shaft
PTO shaft
Rear axle case
Second shaft
Shift cover
Shuttle dear case
Shuttle shaft
Transmission case
Clutch
Clutch lever
Clutch pedal
Clutch housing

Cooling System parts

Radiator
Shutter
Fan
Reserve tank
Water pipe

Cylinder Head

Kubota WG750 Parts – Electrical System

Battery
Alternator
Dynamo
Dynamo and van
Light
Regulator and meter
Electrical wiring
Hazard light/tail light touch
Head light
Panel board/switch
Starter
Switch
Stop solenoid
Tail light
Working light
Switch/sensor

Kubota WG750 Parts – Engine

Accelerator lever
Air cleaner
Alternator
Camshaft and idle gear shaft
Cover
Crankcase
Cylinder head
Dipstick and guide
Exhaust manifold
Fan
Flywheel
Fuel camshaft
Gear case
Governor
Head cover
Idle apparatus
Injection pump
Inlet manifold
Lower gasket kit
Main bearing case
Muffler
Nozzle holder
Oil filter
Oil pump
Oil switch/thermometer
Piston and crankshaft
Speed control plate
Starter
Stop solenoid
Kubota kit
Valve and rocker arm
Water flange and thermostat
Water pump

Kubota WG750 Filters and Maintenance

Frame Parts

Front axle parts

Differential gear shaft
Bevel gear case
Knuckle shaft
Engine support
Front axle
Front axle case
Front differential
Front differential case
Front drive shaft
Front frame
Subframe

Kubota WG750 Parts – Fuel Sytem

Fuel pipe
Fuel filler
Sedimenter
Separator
Fuel filter
Fuel tank

Hood / Bonnet – ROPS Parts

Bonnet
Bonnet side
Center pillar
Floor sheet
Main frame
Shutter plate
Side cover
Fender
Front grille support
Lever guide
Manual holder
Panel frame
ROPS
Seat
Street support
Step
Step stay

Hitch and Drawbar

Drawbar and hitch
PTO shaft protector

Hydraulic system parts

3 point linkage
Control valve
Cylinder front cover
Draft control valve
Feedback lever
Hydraulic oil line
Hydraulic cylinder
Hydraulic pump
Lift arm
Position control lever
Top link bracket

Ignition Parts

Paint and Trim Parts

Pump Motor System

Control valve
3 point linkage
Feedback lever
Oil tank
Position control lever
PTO valve
Safety valve
Hydraulic control lever
Hydraulic cylinder
Hydraulic oil line/delivery
Hydraulic line/steering
Hydraulic piston/lift arm
Hydraulic pump
Hydraulic pump/component parts

Rear axle parts

Differential lock pedal
Rear axle
Rear differential
Rear wheel
Spiral bevel pinion

Rear PTO parts

Section part

Speed Change Lever

Differential lock shift fork
Frontwheel drive lever
Main gear shift fork
Main gear shift lever
PTO gear shift arm
PTO gear shift fork
PTO gear shift lever
PTO select lever
Range gear shift fork
Range gear shift lever
Speed control pedal

Steering parts

Steering controller
Steering cylinder/component parts
Steering handle
Manual steering
Steering linkage
Steering post
Tilt pedal

Kubota WG750 Parts – Transmission

Clutch shaft/output shaft
Front wheel propeller shaft
Countershaft
Main shaft
PTO counter shaft
Reverse shaft
Forward idle shaft
GP idle shaft
HST one – cylinder block
HST two/arm
HST 3/port block cover
HST 4/oil cooler cover
HST fan cover
Mid PTO
Propeller shaft
PTO shaft
Rear gear shaft
Rear axle case
Rear differential
Transmission case

Kubota WG750 Parts – Filters and maintenance

Air filter
Engine oil filter
Extended life antifreeze/coolant
Filter maintenance kit
Fuel filter – in line
High-performance agricultural/construction equipment grease
Hydraulic oil filter
Hydraulic suction oil filter
Lever action grease gun
Engine oil
Gear lubricant
Synthetic universal hydraulic fluid

Kubota WG750 Parts – Cylinder head and Related Components

Complete cylinder head
Exhaust valve guide
Inlet valve guide

Kubota WG750 Parts -Transmission

HST Damper
Universal joint assembly

Kubota WG750 Parts – Electrical

Alternator
Fuel shutoff solenoid
Hazard lamp
Headlight assembly
Headlight lens
Keys
Kubota battery
Oil pressure switch
Re-manufactured starter
Safety switch, seat
Starter assembly
Starter switch and keys
Tail lamp
Timer relay
Turn Signal Lamp

Kubota WG750 Parts – Engine gaskets and gasket kits

Gasket kit – upper

Kubota WG750 Parts – Mower Deck

Dial Cam

Kubota WG750 Parts – Exhaust system parts

Exhaust manifold
Exhaust manifold gasket

Kubota WG750 Parts – Cooling System

Cooling fan
Fan belt
Lower radiator hose
Radiator
Radiator screen
Thermostat
Apart radiator hose
Water pump
Water pump gasket