This is the factory Workshop Manual for the Fiat Kobelco E30.2SR and E35.2SR short-radius excavators: OEM #604.13.363, 770 pages, English. Inside are hydraulic circuit schematics with component-by-component operation, wiring diagrams keyed to harness connection charts, and a full Yanmar 3TNV88 troubleshooting section covering starting faults, output drops, and exhaust trouble. Torque tables for capscrews, joints, hoses, and sleeve-type tube fittings sit in their own section, alongside teardown procedures that run from bucket pins to the slewing bearing. Main relief pressure is specified at 23.0 MPa on page 91, and the electrical chapter carries the relay coil and insulation-resistance figures you need before you condemn a harness. No more chasing electrical gremlins with a multimeter and a prayer. Bookmarked, text-searchable, and readable on any device: download it, walk out to the machine, and start wrenching.
What's Inside This Fiat Kobelco E30.2SR, E35.2SR Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Precautions | 5-12 | General Safety Information |
| Outline | 13-22 | General Precautions for Repairs, International Unit Conversion System (Based on Marks’ Standard Handbook for Mechanical Engineers), Table 1-1, Table 1-2, Table 1-3, Table 1-4 |
| Specifications | 23-38 | Components Name, Machine Dimensions, Specifications and Performance, Machine & Components Weight (Dry), Transportation, Type of Crawler Shoes, Type of Bucket, Engine Specifications |
| Attachment Dimensions | 39-62 | Boom, Fig. 3-1 Boom Dimensional Drawings, Table 3-1, Fig. 3-2 Clearance of Pin and Bushing on Boom Section, Table 3-2, Fig. 3-3 Clearance in Thrust Direction on Boom Section |
| Tools | 63-74 | Torque Specifications for Capscrews & Nuts, Screw and Tool Sizes, Torque Specifications for Joints and Hoses, Torque Specifications for Sleeve Type Tube Fittings |
| Standard Maintenance Time Table | 75-86 | Preface, Standard Working Time Table for the Maintenance of Excavator |
| Maintenance Standards and Test Procedures | 87-108 | How to Use Maintenance Standards and Precautions, Performance Inspection Standard Table, Measuring Engine Speed, Fig. 13-1 Engine Speed Measurement (the Above Figure Shows Concept) |
| Hydraulic System | 109-122 | Summary, Hydraulic Circuits and Component Models, Hydraulic Circuit Operation |
| Electrical System | 123-150 | How to Read Circuit Diagram and Harness Connection, Electrical Equipment & Harness, Fig. 23-1 Upper Frame Portion, Fig. 23-2 Upper Frame Portion |
| Components System | 151-152 | Hydraulic Pump, Pilot Valve, Control Valve, Slewing Motor, Travel Motor, Swivel Joint |
| Hydraulic Components | 153-222 | Hydraulic Pump, Operation, Swash Plate (Hanger), Rotary Group, Control Spring, Cover, Gear Pump |
| Electrical Equipment List | 223-224 | Diode List, Electrical Fittings List, Light List, Motor List, Relay List, Sensor List, Solenoid List, Switch List |
| Electrical Equipment Specifications | 225-232 | Fuse Box Specifications, Generator Specifications, Horn Specifications, Power Socket Specifications, Air Heater Specifications, Radio Specifications, Battery Specifications |
| Electrical Component Arrangement | 233-246 | Upper Frame Components, Relay Unit Portion, Fuel Tank Portion, Socket and Hour Meter Assembly, Work Light Portion, Cab Portion |
| General Disassembly and Assembly | 247-252 | General Disassembly Procedures, Tightening Torque Specifications |
| Attachments | 253-284 | Bucket Removal and Installation, Arm Removal and Installation, Boom Removal and Installation, Swing Bracket and Cylinder Removal, Dozer Removal and Installation |
| Upper Slewing Structure | 285-414 | Canopy and Cab Removal, Counterweight Removal, Pump Removal, Control Valve Removal, Engine Removal, Pilot Valve Removal, Slewing Motor Removal, Swivel Joint Removal |
| Travel System | 415-518 | Crawler Removal and Installation, Upper Roller Removal, Lower Roller Removal, Front Idler Removal, Sprocket Removal, Travel Motor Removal, Slewing Bearing Removal |
| Engine Troubleshooting and Maintenance | 519-770 | Engine Starting Trouble, Engine Rotation Trouble, Engine Output Drops, Exhaust Trouble, Engine Maintenance Schedule, Cylinder Head Inspection, Gear Train and Camshaft |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Harness end treatment length | 30 ± 10 mm | p. 125 |
| Diode mating connector 2 poles current | 3A | p. 225 |
| M8 B terminal tightening torque | 98±1.2 N⋅m | p. 232 |
| Coil resistance | 72Ω±10% | p. 235 |
| Insulation resistance | 20MΩ (500V) | p. 235 |
| Travel motor fixing Capscrew M12 torque | 107 N•m (78.9 lbf•ft) | p. 447 |
| Fusible link | 45A | p. 512 |
| Water separator retaining ring tightening torque | 15-20 Nm | p. 579 |
| Fuel filter tightening torque (3TNV82A to 4TNV106(T)) | 20-24 Nm | p. 579 |
| Thermo switch continuity temperature | 107~113 °C | p. 595 |
| Thermostat valve opening temperature | 69.5~72.5 °C | p. 597 |
| Engine Output Rating | 21.2 kW / 2400 rpm | p. 28 |
Fiat Kobelco E30.2SR, E35.2SR Common Problems This Manual Covers
Fiat Kobelco E30.2SR starter clicks but engine won't crank, intermittent no-start when hot
Test battery voltage first; the starter needs a solid 12 V nominal supply. Check the 45A fusible link covered on page 512, then measure main relay coil resistance, which should read 72Ω±10% per page 235. Clean the M8 B terminal and verify the torque value with the manufacturer, as 98 N·m is excessive for an M8 bolt, before condemning the starting motor.
Manual Section: Electrical System Troubleshooting p. 512Boom and bucket feel weak, hydraulics slow under load, pressure drops when digging
Check hydraulic oil level and swap the return filter before condemning the pump; clogged filters starve the whole circuit. Connect a gauge and test main relief pressure on boom, bucket, and travel left; the standard is 23.0 MPa per page 91. Low pressure across all circuits points to the pump, one circuit points to that valve section.
Manual Section: Hydraulic System Troubleshooting p. 91Tracks creep at neutral with travel levers centered, delayed response when levers released
Park on flat ground and confirm both travel levers center fully. Contaminated pilot oil sticking a travel spool is the usual culprit, so drain a sample and change hydraulic filters if it looks dirty. Follow the travel troubleshooting procedures; if you pull a travel motor, torque the M12 fixing capscrews to 107 N•m on reinstall.
Manual Section: Travel SystemCoolant temperature warning during heavy digging, engine overheats within an hour of work
Drain and inspect the coolant; engine-only capacity is just 2.0 L, so a small loss matters. Test the thermostat in heated water: it should start opening at 69.5 to 72.5 °C and reach full lift at 85 °C per page 597. Verify the thermo switch closes between 107 and 113 °C, shown on page 595, and replace it if continuity is off.
Manual Section: Engine Troubleshooting and Maintenance p. 597Engine cranks fine but won't fire, runs rough then dies at idle
Open the water separator drain and look for water or debris in the diesel. Replace the fuel filter, torquing it to 20 to 24 Nm, and snug the separator retaining ring to 15 to 20 Nm as shown on page 579. Bleed the fuel system, then check the maintenance schedule and shorten filter intervals if fuel quality is poor.
Manual Section: Engine Troubleshooting and Maintenance p. 579Frequently Asked Questions
What is the standard valve clearance on the 3TNV88 engine in the E30.2SR and E35.2SR?
The standard valve clearance is 0.15 to 0.25 mm. The manual gives this figure for the 3TNV82A through 3TNV98 range, which covers the 3TNV88 fitted to these excavators. p. 585
What is the cylinder head bolt tightening torque on the 3TNV88 engine?
The 3TNV88 sits in the manual's TNV84-88 column: tighten the head bolts in two steps, 41.1 to 46.9 Nm (4.2 to 4.8 kgf·m) first, then 85.3 to 91.1 Nm (8.7 to 9.3 kgf·m). The lower 30.0-34.0 / 61.7-65.7 Nm pair on the same table belongs to the TNV82A and does not apply to these machines. p. 624
What is the engine oil pan capacity on the E30.2SR and E35.2SR?
These excavators run the 3TNV88 at 2400 rpm, which is the VM specification class in the manual's engine table: 7.2 litres total, 3.5 litres effective. The 4.7 / 1.8 litre pair on the same row is the CL class, rated only at 1500 and 1800 rpm. Yanmar also notes actual capacity can differ with the installation, so confirm against the dipstick. p. 550
What is the standard fuel injection pressure on the 3TNV88 in these excavators?
For the VM specification class these machines use, the standard injection pressure is 21.6 to 22.6 MPa (220 to 230 kgf/cm²). CL-class engines are set to 19.6 to 20.6 MPa (200 to 210 kgf/cm²). Add 0.5 MPa when adjusting a brand-new nozzle, since the spring beds in over the first few hours of running. p. 587
What is the standard V-belt tension for the engine?
The V-belt tension (deflection) at 98N (10kgf) pressure should be 10 to 14 mm for a used belt and 8 to 12 mm for a new belt when measured between the alternator and crank pulley. p. 570
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