Part of the Kubota Repair Manuals.
This is the Kubota Workshop Manual for the E4B Series diesel engines: the Z482-E4B, Z602-E4B, D722-E4B, D782-E4B, and D902-E4B. It is the same 138 page factory service document Kubota supplies to its dealer technicians, covering engine identification, specifications, mechanism, and full servicing procedures.You get the numbers that matter for a rebuild or a running repair: valve clearance, compression pressure, engine oil pressure, injection timing, and the complete tightening torque tables for both general and special use fasteners. The manual walks through troubleshooting, disassembly, checking, and reassembly with factory specifications and allowable limits.Whether one of these engines runs in a compact tractor, a generator, or industrial equipment, this PDF lets you diagnose a fault, set clearances correctly, and torque everything back to spec. Download it once and keep it on a phone, tablet, or shop computer, and print any page you need at the bench.
What's Inside This Kubota Super Mini Series Engines Manual
| System | Pages | Key Topics |
|---|---|---|
| Workshop Manual | 1-2 | WSM, Diesel Engine, Sm-E4B Series, Kubota |
| Information | 3-19 | - |
| General | 20-58 | Engine Identification (Model Name and Engine Serial Number, Cylinder Number), Maintenance Check List |
| Mechanism | 59-63 | Engine, Contents, Engine Body (Half-Floating Head Cover, Closed Breather, Piston, Oil Pan), Cooling System (Cooling Fin) |
| Servicing Specifications | 65-72 | Troubleshooting |
| Cooling System | 73-82 | Tightening Torques, Fuel System, Lubricating System, Electrical System, Checking, Disassembling and Servicing, Tightening Torques for Special Use Screws, Bolts and Nuts |
| Electrical System | 83-92 | Fuel System |
| Gear Case and Timing Gears | 93-104 | External Components, Disassembling and Assembling |
| Flywheel and Crankshaft | 105-110 | Piston and Connecting Rod |
| Servicing | 111-119 | Alternator, Starter, Dynamo |
| Crankshaft | 120-130 | Timing Gears, Piston and Connecting Rod |
| Alternator | 131-138 | Starter, Oil Pump, Cylinder |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Z482-E4B | ||
| Engine oil capacity (Oil Pan Depth 101 mm / 3.98 in.) | 2.1 L (0.55 U.S.gals) | p. 30 |
| Engine oil capacity (Oil Pan Depth 121 mm / 4.76 in.) | 2.5 L (0.66 U.S.gals) | p. 30 |
| D722-E4B | ||
| Engine oil capacity (Oil Pan Depth 101 mm / 3.98 in.) | 3.2 L (0.85 U.S.gals) | p. 30 |
| Engine oil capacity (Oil Pan Depth 121 mm / 4.76 in.) | 3.8 L (1.0 U.S.gals) | p. 30 |
| All Models | ||
| Drain plug with copper gasket (M12 x 1.25) tightening torque | 33 to 37 N-m / 3.3 to 3.8 kgf·m / 24 to 27 lbf·ft | p. 77 |
| Drain plug with copper gasket (M22 x 1.5) tightening torque | 64 to 73 N-m / 6.5 to 7.5 kgf·m / 47 to 54 lbf·ft | p. 77 |
| Drain plug with rubber coated gasket (M22 x 1.5) tightening torque | 45 to 53 N-m / 4.5 to 5.5 kgf·m / 33 to 39 lbf·ft | p. 77 |
| Cylinder head cover screw tightening torque | 9.81 to 11.2 N-m / 1.00 to 1.15 kgf·m / 7.24 to 8.31 lbf·ft | p. 77 |
| Injection pipe retaining nut tightening torque | 25 to 34 N-m / 2.5 to 3.5 kgf·m / 18 to 25 lbf·ft | p. 77 |
| Overflow pipe retaining nut tightening torque | 20 to 24 N-m / 2.0 to 2.5 kgf·m / 15 to 18 lbf·ft | p. 77 |
| Nozzle holder assembly tightening torque | 49 to 68 N-m / 5.0 to 7.0 kgf·m / 37 to 50 lbf·ft | p. 77 |
| Glow plug tightening torque | 7.9 to 14 N-m / 0.80 to 1.5 kgf·m / 5.8 to 10 lbf·ft | p. 77 |
Kubota Super Mini Series Engines Common Problems This Manual Covers
Hard starting and low compression
Worn valves, tired rings, or a leaking head gasket drop compression and make an E4B engine hard to start, especially cold. The Servicing section lists the factory compression pressure and the troubleshooting steps to isolate the cause.
Manual Section: Servicing p. 64Overheating and coolant loss
Clogged cooling fins, a tired water pump, or a stuck thermostat push coolant temperature up under load. The Cooling System coverage explains the cooling fin and thermostat behavior for these engines.
Manual Section: Cooling System p. 60Excessive blow-by through the breather
Worn piston rings or cylinder bores force combustion gases past the closed breather and show up as oil misting and pressure. The Engine Body coverage details the piston and closed breather construction.
Manual Section: Engine Body p. 60Rough running and injection timing
A knocking, smoky, or rough-running diesel often traces to injection timing or a worn nozzle. The Servicing section gives the model-specific injection timing figures and the checking procedure.
Manual Section: Servicing p. 64Low engine oil pressure
A falling oil pressure reading points to a worn oil pump, a stuck relief valve, or diluted oil. The Servicing section lists the idle and rated oil pressure specifications and the checking method.
Manual Section: Servicing p. 64Missed service intervals
Skipping oil, filter, and belt service shortens the life of these engines. The Maintenance Check List lays out the daily and hour-based check points so nothing gets overlooked.
Manual Section: Maintenance Check List p. 21Frequently Asked Questions
Which engines does this manual cover?
It covers the Kubota E4B Series diesel engines: Z482-E4B, Z602-E4B, D722-E4B, D782-E4B, and D902-E4B. It is Kubota publication 9Y111-07850.
Does it include tightening torque specifications?
Yes. The Servicing section carries the full tightening torque tables for general and special use screws, bolts, and nuts, including cylinder head, connecting rod, and flywheel fasteners. p. 64
What valve clearance and compression does it specify?
It specifies a cold valve clearance of 0.145 to 0.185 mm, plus compression pressure and the other servicing specifications, all in the Servicing section. p. 64
Is this the complete factory manual?
Yes. This is the full 138 page Kubota factory Workshop Manual in English with a selectable text layer, covering specifications, mechanism, and servicing.
How will I receive this Kubota Z482-E4B & variants Workshop Manual?
Immediate download of the complete 138-page searchable Workshop Manual. Use it on any device, whether that's a laptop at your desk or a phone out in the field.
Can I print this manual?
Yes, print as many copies as you want; there are no restrictions. Plenty of mechanics print just the section they need and take it to the shop floor.
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