Sat for a season and the L4400H won't crank to life? Start with the fuel lift pump, the filter, or air in the lines. The 312 pages here carry every part number the repair calls for.
Need the exact part number for your Kubota L4400H? The factory parts catalog maps every component across 312 pages, from the crankcase and injection pump through the HST drivetrain, rear differential, and 3-point hydraulic linkage. You'll work from 309 pages of parts lists, each paired with an exploded-view diagram, covering everything from crankcase internals to optional auxiliary control valve kits. Switches, sensors, relays, and wiring harness components are all called out by catalog number, and 15 pages of hydraulic parts cover pump internals, steering cylinder seal kits, and PTO oil line pieces. Replacing a piston? The +0.25mm oversize and -0.40mm/SET undersize crankpin bearing are both listed, so you order the right grade on the first call. No more digging through binders at the parts counter. Bookmarks let you jump to any assembly in seconds and carry the whole catalog to the machine on your phone.
What's Inside This Kubota L4400H Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Crankcase | 3-4 | Comp.Crankcase, Plug, Cap Sealing, Pin Straight, Assy Pump Oil, Gear Oil Pump Drive |
| Oil Pan | 5-6 | Gasket Oil Pan, Plug Drain, Filter Oil, Guide Oil Gauge, Gauge Oil |
| Cylinder Head | 7-8 | Comp.Cylinder Head, Cap Sealing, Guide Inlet Valve, Guide Valve Exhaust, Seat Inlet Valve, Gasket Cylinder Head |
| Gear Case | 9-11 | Comp.Case Gear, O Ring, Base Oil Filter, Gasket Gear Case, Cartridge Oil Filter, Assy Gear Case H/M |
| Head Cover | 12-13 | Assy Cover Cyl.Head, Pipe Water Return, Cover Breather, Gasket Head Cover, Tube Breather, Plug Oil Filler |
| Main Bearing Case | 14-15 | Assy Brg.Case Main, Metal Crankshaft, Bolt Bearing Case, Gasket Bearing Case, Cover Bearing Case, Seal Oil |
| Camshaft and Idle Gear Shaft | 16-17 | Assy Camshaft, Tappet, Push Rod, Gear Cam, Comp.Gear Idle, Shaft Idle Gear |
| Piston and Crankshaft | 18-20 | Piston, Assy Piston Ring, Pin Piston, Assy Connecting Rod, Comp.Crankshaft, Kit Piston |
| Flywheel | 21-22 | Comp.Flywheel, Gear Ring, Bolt Flywheel, Comp.Housing F-W., Pin Straight, Packing Cover |
| Fuel Camshaft | 23-24 | Assy Camshaft Fuel, Bearing Ball, Gear Injection Pump, Sleeve Governor, Case Governor Ball, Stopper Fuel C/Shaft |
| Engine Stop Lever | 25-26 | Apparatus Idling, Assy Bolt Adjustment, Assy Lever Eng.Stop, Comp.Lever Stop, Comp.Guide Solenoid, Assy Solenoid |
| Injection Pump | 27-28 | Assy Pump Injection, Shim Injection Pump, Assy Cock Jet Start, Assy Pump Fuel, Assy Tube Fuel, Tube Fuel |
| Governor | 29-30 | Assy Lever Fork, Shaft Fork Lever, Holder Fork Lever, Spring Governor |
| Speed Control Plate | 31-32 | Assy Bolt Adjustment, Assy Plate Control, Comp.Lever Governor, Lever Speed Control, Bolt Idling Adjust, Gasket Plate |
| Nozzle Holder and Glow Plug | 33-34 | Assy Pipe Over Flow, Kit Holder Nozzle, Pipe Injection, Glow Plug, Cord Glow Plug, Clamp Pipe |
| Nozzle Holder [Component Parts] | 35-37 | Kit Holder Nozzle, Washer Adjusting, Spring Nozzle, Piece Distance, Push Rod, Piece Nozzle |
| Water Flange and Thermostat | 38-39 | Comp.Flange Water, Plug Drain, Gasket, Pipe Water Return, Cover Thermostat, Assy Thermostat |
| Water Pump | 40-41 | Assy Pump Water, Body Water Pump, Bearing, Impeller Water Pump, Assy Seal Mechanical, Flange W/Pump Shaft |
| Valve and Rocker Arm | 42-43 | Valve Inlet, Valve Exhaust, Spring Valve, Retainer Valve Sp., Collet Valve Spring, Shaft Rocker Arm |
| Inlet Manifold | 44 | Figure Num 010601 |
| Exhaust Manifold/Muffler | 45-46 | Manifold Exhaust, Gasket Muffler, Gasket Ex-Manifold, Muffler |
| Air Cleaner | 47-48 | Assy Cleaner Air, Assy Element Outer, Assy Cover A/C, Valve Evacuator, Assy Element Inner, Band Pipe |
| Upper Gasket Kit | 49-50 | Kit Gasket Upper, Gasket Cylinder Head, Gasket In-Manifold, Seal Valve Stem, Gasket Head Cover, Comp.Valve Breather |
| Lower Gasket Kit | 51-52 | Kit Gasket Lower, Gasket Oil Pan, Gasket Gear Case, Gasket Return Flange, Gasket Water Flange, Gasket Bearing Case |
| Accelerator Lever | 53-54 | Grommet Hand Accel., Grip Lever, Assy Cable.Accel, Lever Hand Accel., Lever Accel.Arm, Plate Accel |
| Fuel Tank | 55-56 | Tank Fuel, Assy Cap Fuel Tank, Gasket, Sponge, Plate Fuel Tank, Bolt |
| Fuel Pipe and Fuel Filter | 57-58 | Assy Filter Fuel, Assy Tube Fuel, Clamp Hose, Tube Pipe, Tube Fuel, Pipe Fuel |
| Fuel Filter [Component Parts] | 59-60 | Assy Filter Fuel, Handle Filter, Gasket, Retainer Handle, Element Filter, Spring |
| Fan | 61 | Figure Num 01A401 |
| Water Pipe | 62 | Figure Num 01A410 |
| Radiator | 63-64 | Assy Radiator, Kit Shuroud Fan, Cap Radiator, Plug Drain, Net Radiator, Stay Cover |
| Reserve Tank | 65-66 | Assy Tank Reserve, Assy Cap, Gasket, Clip Pipe, Hose, Stay Reserve Tank |
| Alternator | 67-68 | Figure Num 01A515 |
| Alternator [Component Parts] | 69-70 | Assy Alternator, Pulley Alternator, Assy Frame Drive End, Bearing Ball, Assy Rectifier, Assy Regulator |
| Starter | 71 | Figure Num 01A525 |
| Starter [Component Parts] | 72-73 | Assy Starter, Assy Yoke, Assy Armature, Clutch Starter, Assy Housing Starter, Assy Switch Magnetic |
| Battery | 74-75 | Label Battery, Cord Battery, Support Battery, Retainer Battery, Bolt Hook |
| Switch 1/Relay | 76-77 | Relay Starter, Unit Flasher, Switch Main, Harness Main Switch, Switch Combination, Assy Key Main Switch |
| Switch 2/Sensor | 78-79 | Switch Oil, Sensor Water Temp., Switch Lever, Sensor Fuel Gauge, Switch Safety, Nut Safety Switch |
| Panel Board | 80-81 | Assy Panel, Clamp Cord, Assy Cable Flexible, Cover Meter Panel, Bolt Flange, Grommet |
| Panel Board [Component Parts] | 82-83 | Assy Panel, Comp.Meter, Assy Case, Assy Bulb, Glass, Cover |
| Head Light | 84-85 | Assy Light Head, Bulb, Assy Wire Harness, Unit Lamp, Mark Symbol, Clamp Cord |
| Hazard Light | 86 | Figure Num 01B311 |
| Rear Lamp | 87-88 | Assy Light Combi.Rh, Lens, Gasket, Bulb, Screw, Holder |
| Electrical Wiring (Front) | 89-90 | Wire Harness HST, Case Fuse Box, Puller Fuse, Fuse, Clip, Band Cord |
| Electrical Wiring (Rear) | 91-92 | Wire Harness HST, Clip, Plate Harness Clip, Plate Fuel Tank, Bolt Flange |
| Clutch | 93 | Figure Num 01C101 |
| Clutch Lever | 94-95 | Lever Clutch, Holder Clutch, Bearing Release, Pin Snap, Fork Clutch Release, Key Fork |
| Clutch Pedal | 96-97 | Assy Pedal Clutch, Bush, Spring, Cover Pedal, Rod Brake Upper, Pin Joint |
| Clutch Housing | 98-99 | Assy HST, Bush, Kit Plug, Pin Straight, Stud, Bolt |
| HST (Hi-Lo and Solenoid Valve) [Component Parts] | 104-105 | Assy HST, Assy Valve HST, Spring, Shim, O Ring, Bolt Joint |
| HST (Relief Valve) [Component Parts] | 106-107 | Assy HST, Assy Valve Relief, Comp.Valve Relief, Plug, O Ring, Shim |
| HST (Cylinder Block) [Component Parts] | 108-109 | Assy HST, Shaft, Assy Rotary Pump, Spring, Assy Swash Plate, Bearing Ball |
| HST (Charge Pump) [Component Parts] | 110-111 | Assy HST, Assy Cover Portblock, Bearing Needle, Seal Oil, Assy Pump, Rotor |
| HST (Input Shaft) [Component Parts] | 112-113 | Assy HST, Case Propeller Shaft, Gear-Shaft Input, Bearing Ball, Seal Oil, Gear HST |
| Mid Case | 114-115 | Case Mid HST, Holder Bearing, Piston, Spring, Seal Piston, Plug |
| Transmission Case | 116-117 | Case Transmission, Gauge Oil, Pin Straight, Holder Bearing, Plug Drain, Bolt |
| Countershaft | 118 | Figure Num 01D105 |
| Range Gear Shaft | 119-120 | Gear-Shaft, Coupling, Bearing Ball, Collar |
| Spiral Bevel Pinion | 121-122 | Gear 4Wd, Bearing Taper-Roller, Shim, Gear, Bearing Needle, Boss Spline |
| Rear Differential | 123-125 | Assy Differential, Case Differential, Shaft Diff.Pinion, Pinion Diff., Shim Differential, Bearing Taper-Roller |
| PTO Countershaft | 126 | Figure Num 01D130 |
| PTO Clutch | 127-128 | Gear-Shaft I-Pto, Assy Clutch I-Pto, Disk Brake, Bearing Needle, Seal Ring, Bearing Ball |
| PTO Clutch [Component Parts] | 129-130 | Piston, D Ring Outer, Plate Brake, Spring Return, Disk Clutch, Hub Clutch |
| PTO Drive Shaft | 131-132 | Gear, Collar Thrust, Bearing Needle, Shaft PTO Drive, Bearing Ball, Gear PTO |
| PTO Shaft | 133-134 | Shaft PTO, Coupling PTO, Collar Oil Seal, Bearing Ball, Case Bearing, Seal Oil |
| Range Gear Shift Fork | 135-136 | Fork Range Shift, Rod Range Shift, Pin Spring, Arm Shift, Stopper, Bolt Flange |
| Differential Lock Shift Fork | 137-138 | Fork Diff.Lock Shift, Pin Joint, Shaft Fork, Seal Oil, Rod Diff.Lock, Plate Diff.Lock |
| Cruise Control Lever | 139-140 | Assy Lever Control, Assy Rod, Rod Cruise, Rod Shift, Turnbuckle, Assy Lever Speed Set |
| Cruise Control Cable | 141-142 | Plate Friction, Disk Friction, Assy Lever Cruise, Cable Cruise, Rod Adjusting, Bracket Speed Set |
| Neutral Holder Link | 143-144 | Bracket HST, Assy Cam, Assy Arm Neut.Holder, Rod Neutral Switch, Damper HST, Rod HST Neutral |
| Speed Control Pedal | 145-146 | Pedal HST Control, Rod HST Pedal, Lever HST Pedal, Shaft HST Pedal, Pin Spring, Seal Oil |
| Range Gear Shift Lever | 147-148 | Assy Lever R/Shift, Grip Lever, Guide HST Cahnge, Lever Range Shift, Rod Range Shift, Pin Spring |
| PTO Clutch Control Lever | 149-150 | Assy Valve I-Pto, Pipe Hydraulic, Cable PTO, Lever PTO Clutch, Grip PTO Lever, Guide PTO Lever |
| PTO Clutch Valve [Component Parts] | 151-152 | Assy Valve I-Pto, O Ring, Plug, Ring, Lever Valve Rotor, Spring |
| Front Wheel Drive Lever | 153-154 | Lever Shift, O Ring, Stopper, Bolt Flange, Lever Front Drive, Grip Lever |
| Rear Axle Lh | 155-156 | Shaft Diff.Gear Lh, Bearing Ball, Axle Rear, Spacer, Seal Oil, Stud |
| Rear Axle Rh | 157-158 | Shaft Diff.Gear Rh, Bearing Ball, Axle Rear, Spacer, Seal Oil, Stud |
| Brake Lh | 159-160 | Case Brake Lh, Pin Straight, Stud, Cam Brake Lh, Disk Brake Main, Lever Brake Cam Lh |
| Brake Rh | 161-162 | Case Brake Rh, Pin Straight, Stud, Cam Brake Rh, Disk Brake Main, Lever Brake Cam Rh |
| Brake Rod 1 (Brake Pedal) | 163-164 | Assy Lever Brake Lh, Bush, Shaft Brake Lh, Rod Brake Upper, Pin Joint, Pin Split |
| Brake Rod 2 (Brake Cam) | 165 | Rod Brake, Pin Joint, Washer Plain, Pin Split |
| Brake Pedal | 166-167 | Shaft Pedal, Cir Clip External, Washer Plain, Nut Flange, Pedal Brake Lh, Cover Pedal |
| Front Axle Frame | 168-169 | Frame Front Axle, Bolt, Plug, Guide P.S. Hose |
| Propeller Shaft | 170-171 | Shaft Propeller, Coupling, Spacer, Bearing Ball, Seal Oil, Sleeve |
| Front Wheel Drive Shaft | 172 | Figure Num 01F122 |
| Front Differential Case | 173-174 | Case Front Axle, Plug, Gasket, Washer with Rubber, O Ring, Pipe Breather |
| Bevel Gear (Front) | 175-176 | Assy Gear Bevel, Bearing Taper-Roller, Collar, Nut, Seal Oil, Cir Clip Internal |
| Differential (Front) | 177-178 | Case Diff., Pin Straight, Bolt, Bearing Ball, Cir Clip External, Shaft Pinion |
| Front Axle Case Lh | 179-180 | Shaft Bevel Gear, Case Front Gear Lh, Plug, Washer with Rubber, Seal Oil, Bearing Ball |
| Front Axle Case Rh | 181-182 | Shaft Bevel Gear, Case Front Gear Rh, Plug, Bearing Ball, Cir Clip Internal, Shim |
| Differential Gear Shaft | 183-184 | Shaft Yoke Lh, Case Bevel Gear, Pin Straight, Bearing Ball, Collar, Shim |
| Front Axle | 185-186 | Axle Front, Bearing Ball, Gear Bevel, Collar, Seal Oil, Cover Front Axle |
| Steering Handle | 187-188 | Post Steering, Bearing Ball, Shaft Steering, Shaft Joint, Wheel Steering, Cushion |
| Steering Controller | 189-190 | Controller, Joint Ps Cylinder, Joint Pipe, Joint Return, Nut, Washer Plain |
| Steering Support | 191-192 | Comp.Supp.Steering, Lock Parking Lever, Pin Spring, Bearing Needle, Seal Oil, Plate Steer.Support |
| Tie Rod/Steering Cylinder | 193-194 | Assy Rod Tie, End Tie Rod, Joint Tie Rod, Cylinder Hydraulic, Clip, Nut |
| Steering Cylinder [Component Parts] | 195-196 | Cylinder Hydraulic, Seal Piston, Assy End Rod, Bush, Seal Rod, Kit Seal |
| Hydraulic Pump | 197-198 | Holder Pump, Bearing Ball, O Ring, Gear Pump Drive, Assy Pump Hydraulic |
| Hydraulic Pump [Component Parts] | 199-200 | Assy Pump Hydraulic, Bush, Pin Straight, Comp.Gear Hyd.Pump, Plate Side, Ring Double |
| Hydraulic Oil Line (Inlet) | 201-202 | Bracket Filter, Assy Filter Oil, Magnet Oil Filter, Pipe Inlet, Hose Inlet, Pipe Suction HST |
| Hydraulic Oil Line (Delivery) | 203-204 | Comp.Pipe Delivery, O Ring, Tube, Bolt, Holder, Joint |
| Hydraulic Oil Line (Ps) | 205-206 | Hose Delivery, Joint, Gasket, Adapter, Stay Holder, Holder Hose |
| PTO Hydraulic Oil Line | 207-208 | Comp.Pipe I-Pto, Pipe Rubber, Assy Bolt, Bolt Joint, Gasket, Filter Oil |
| Hydraulic Outlet Block | 209-210 | Assy Block Front Hyd, Cap Hyd.Block, O Ring, Plug, Spring Relief, Poppet Relief |
| Oil Cooler | 211-212 | Pipe HST Return, Bolt Joint, Gasket, Cooler Oil, Hose Oil Cooler, Clamp Hose |
| Hydraulic Cylinder | 213-214 | Assy Case Cylinder, Bush, Plug, Gasket, Breather, O Ring |
| Lift Arm | 215-216 | Piston Hyd., Rod Hyd., Assy Shaft Hyd.Arm, Arm Hydraulic, Link Control, Pin Lift Rod |
| Feed Back Lever | 217-218 | Joint Spool, Lever Spool Drive, Arm Control, Set Plate, Shaft Back Lever, Rod Feed Back |
| Control Valve | 219-221 | Figure Num 01H405 |
| Position Control Lever | 222-223 | Lever Position, Pin Spring, Grip Lever, Guide Hyd.Lever, Stopper, Screw Knob |
| Top Link | 224-225 | Assy Link Top, Joint Top Link, Nut Top Link, Pin Joint, Holder Top Link, Bolt |
| 3-Point Linkage 1 (Lower Link) | 226-227 | Comp.Link Lower, Pin Set, Assy Stabilizer, Comp.Stab.Front, Comp.Joint, Bolt Stabilizer |
| 3-Point Linkage 2 (Lift Rod) | 228-229 | Assy Rod Lift, Rod Lift Lower, Rod Lift Upper, Turnbuckle, Pin Lift Rod, Ring Snap |
| Drawbar | 230 | Figure Num 01K105 |
| PTO Protector | 231-232 | Kit Cover PTO, Label PTO Warning, Label Drawbar, Stay, Spring Plate, Nut |
| Front Grille | 233-234 | Assy Grille Bonnet, Grille Light Lh, Grille Light Rh, Base Grille, Support Bonnet |
| Hood (Bonnet) Front Support | 235-236 | Bonnet Under, Bonnet Front Lh, Bonnet Front Rh, Support Front, Bracket, Sponge Bonnet Lower |
| Hood (Bonnet) | 237-238 | Kit Bonnet, Label Filler, Cushion Link, Pin Snap, Handle Mascot, Lock Bonnet |
| Hood(Bonnet) Side | 239-240 | Bonnet Side Lh, Bonnet Side Rh, Bracket, Sponge Bonnet Side, Shield |
| Hood(Bonnet) Side Cover | 241-242 | Assy Cover Lh, Rubber Release Rod, Washer Plain, Assy Cover Rh, Bolt Wing |
| Shutter Plate | 243-244 | Shield, Nut Cushion, Support Shutter, Support Bonnet Rear, Cushion Tank, Plate Shutter |
| Hood(Bonnet) Rear | 245-246 | Kit Bonnet Rear, Nut Spring, Label Start Caution, Assy Bonnet Rear Rh, Clamp Cord, Rubber Cushion |
| Fender | 247-248 | Kit Fender Lh, Label Safety, Kit Fender Rh, Label ROPS Warning, Label Shuttle, Holder Cup |
| Fender Support | 249-250 | Support Fender Lh, Support Fender Rh, Bolt Flange, Support Seat, Bolt, Stay Fender |
| Floor Sheet Cover | 251-252 | Bracket Fender Lh, Bolt Flange, Bracket Fender Rh, Cover Floor Sheet, Bolt |
| Seat | 253-254 | Assy Adjuster Seat, Cushion, Spring Seat, Pin Seat, Assy Suspension Seat |
| Step | 255-256 | Comp.Step HST, Aid Lh, Bracket Step Fron.Lh, Bracket Step Fron.Rh, Bracket Step Rear Rh, Assy Bracket Step |
| Tool Box | 257 | Figure Num 01L240 |
| Smv Emblem | 258-259 | Sign Smv, Socket Smv Sign, Socket-Mtg Smv, Bolt Square Neck, Spade Smv Sign, Washer Spring |
| ROPS | 260-262 | Figure Num 01L301 |
| Front Wheel (8.3-16) | 263-264 | Assy Tire, Tire, Wheel, Label Tire Rh, Label Tire Lh, Stud Wheel, Nut |
| Front Wheel (10.0-16.5) | 265-266 | Tire, Wheel, Label Rh, Label Lh, Stud Wheel, Nut |
| Front Wheel (27-10.50Ll15) | 267-268 | Tire Assy, Tire, Tube, Label Tire, Stud Wheel |
| Front Wheel (305R343 Lsw) | 269-270 | Assy Tire, Tire, Wheel, Label Tire, Stud Wheel, Washer Spring |
| Front Wheel (27*8.50-15) | 271 | Assy Front Wheel, Tire, Wheel, Label Tire, Stud Wheel, Nut |
| Rear Wheel (14.9-24) | 272-273 | Tire, Assy Wheel, Rim, Disk, Bolt, Washer Spring Lock |
| Rear Wheel (44*18-20) | 274-275 | Assy Tire, Tire, Wheel, Label Tire, Stud, Nut |
| Rear Wheel (17.5L-24) | 276-277 | Tire, Assy Wheel, Rim, Disk, Bolt, Washer Plain |
| Label 1 (Front) | 278-279 | Label Start Caution, Label Fan Warning, Label Muffler, Label Filler, Label Kubota, Mark Model |
| Label 2 (Rear) | 280-281 | Mark Position, Label ROPS Warning, Label ROPS Caution, Label Shuttle, Label Drawbar, Label Safety |
| Accessories and Service Parts | 282-283 | Operator'S Manual, Statement Warranty, Stud Wheel, Nut, Washer Spring, Assy Key Main Switch |
| Working Light Kit (W/G No.M9551) [Option] | 284-285 | Assy Light Working, Bulb, U-Bolt, Stay Working Light, Washer Spring, Band Work Light |
| Front Bumper (W/G No.Mx8068) [Option] | 286 | Bumper, Bolt |
| Front Weight (W/G No.Bl8060-1) [Option] | 287 | Weight Front, Bolt Front Weight, Nut, Washer Spring |
| Rear Wheel Weight (W/G No.L8066) [Option] | 288 | Weight Rear Wheel, Bolt, Nut, Washer Spring |
| Position Control Lever (With Draft) (W/G No.L8311A) [Option] | 289-291 | Link Control, Shaft Draft, Spring Plate, Lever Position, Rod Draft, Grip Lever |
| Draft Control Lever (With Draft) (W/G No.L8311A) [Option] | 292-293 | Stay, Shaft Draft, Spring Plate, Lever Cam, Lever Draft, Grip Lever |
| Top Link Holder (With Draft) (W/G No.L8311A) [Option] | 294-295 | Rod Draft, Holder, Pin Joint, Comp Holder Top Link, Pin Straight, Nipple Grease |
| Swinging Drawbar/Clevis Drawbar [Option] | 296-297 | Figure Num 01K105 |
| Auxiliary Control Valve (W/G No.L8303) [Option] | 298 | Figure Num 01H405 |
| Auxiliary Control Valve (Floating) (W/G No.L8304) [Option] | 299 | Figure Num 01H405 |
| Auxiliary Control Valve Lever (1St) (W/G No.L8561) [Option] | 300-301 | Figure Num 01H405 |
| Auxiliary Control Valve Lever (2Nd) (W/G No.L8562) [Option] | 302-303 | Figure Num 01H405 |
| Auxiliary Control Valve Lever (3Rd) (W/G No.L8563) [Option] | 304-305 | Figure Num 01H405 |
| Auxiliary Control Valve Coupler (1St) (W/G No.L8561) [Option] | 306-307 | Figure Num 01H405 |
| Auxiliary Control Valve Coupler (2Nd) (W/G No.L8562) [Option] | 308-309 | Figure Num 01H405 |
| Auxiliary Control Valve Coupler (3Rd) (W/G No.L8563) [Option] | 310-311 | Figure Num 01H405 |
| Auxiliary Control Valve Kit Accesories (W/G No.L8561) [Option] | 312 | Figure Num 01H405 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder Head Gasket Thickness (Max) | 1.35mm | p. 8 |
| Piston Oversize Option | +0.25mm | p. 18 |
| Crankpin Undersize Option | -0.40mm/SET | p. 18 |
| Injection Pump Shim Thickness (Min) | 0.175mm | p. 28 |
| Nozzle Holder Washer Adjusting Thickness (Example) | 0.900mm | p. 35 |
| Battery Type | 80D26R | p. 74 |
| Headlight Bulb Wattage | 25W | p. 84 |
| Hazard Light Bulb Wattage | 23W | p. 86 |
| Rear Lamp Bulb Wattage (Dual Filament) | 23/8W | p. 87 |
| Fuse Rating (Example) | 5A | p. 89 |
| HST Servo Regulator Shim Thickness (Max) | 0.5mm | p. 107 |
| HST Input Gear Teeth Count | 23T | p. 112 |
Kubota L4400H Common Problems This Manual Covers
Kubota L4400H starter clicks or cranks slowly with good battery voltage in cold weather p. 74
Pull up the battery diagram on page 74 for the exact terminal and cord arrangement. Before buying replacements, confirm your machine takes the 80D26R battery. Corroded connections usually trace to the cords, support brackets, or retainers, all listed there by part number.
Manual Section: BatteryHydrostatic transmission does not move tractor, slips, or responds weakly under heavy load p. 106
Open the HST relief valve exploded view on page 106, where the shim part numbers live. Pick the right shims and keep the servo regulator shim at or below its 0.5mm maximum. The same view lists the O-rings and plugs behind internal hydrostatic pressure leaks.
Manual Section: HST (Relief Valve) [Component Parts]Engine loses power under load or stalls when engaging work implements after high hours p. 18
Trace the piston kits through the engine parts diagram on page 18. Note the +0.25mm oversize option for worn cylinders as you pull the numbers for rings and pins. Connecting rod assemblies vary by engine block production run, so match yours exactly.
Manual Section: Piston and CrankshaftEngine cranks but will not start or dies shortly after starting due to weak fuel supply p. 27
Find the correct replacement assembly in the injection pump breakout on page 27. Mind the shim part numbers, since minimum thickness runs 0.175mm. Fuel tube and jet start cock numbers sit in that same exploded view.
Manual Section: Injection PumpFront headlights fail to illuminate or flicker intermittently during evening mowing operations p. 84
Look up the bulb and wire harness part numbers in the headlight exploded view on page 84. Order the 25W headlight bulb specified for this model. The lamp unit and cord clamp parts are cataloged there too, for replacing damaged front sections.
Manual Section: Head LightFrequently Asked Questions
What are the replacement specifications for Fuel filter?
The fuel filter element carries part number 1A001-43160 and weighs 0.165 lbs. You'll find it under the 'FUEL FILTER [COMPONENT PARTS]' section of the catalog.
What are the replacement specifications for Air filter?
The air filter uses two elements: an outer, part number TA040-93230 at 1.232 lbs, and an inner, part number TA040-93220 at 0.429 lbs. Both appear in the 'AIR CLEANER' section.
How will I receive this Kubota L4400H Parts Catalog?
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No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
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