Every one of the 304 pages in this Same 393, 453, 503, 603 Service Manual PDF has one job: getting your Same tractor back to factory condition. You get full wiring diagrams for the alternator, starter, and fuse box, hydraulic schematics for the power-lift and load-sensing control valve, plus troubleshooting charts for the clutch, both gearboxes, brakes, and hydrostatic steering. The engine section walks you through cylinder head, crankshaft, timing gears, fuel system, and cooling, step by step. Set the valve tip clearance at 0.25 mm cold, start the cylinder head capscrews at 20 Nm, and fill the gearbox-cum-hydraulic sump with 35 liters. No more chasing electrical gremlins with a test lamp and a hunch. Bookmarked with a full text layer: open it on any device, search the spec, fix the tractor.
What's Inside This Same 393, 453, 503, 603, SAME 393, SAME 453, SAME 503, SAME 603 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 3-13 | Caution Symbols, Identification Plate, Chassis Serial Number, Engine Serial Number, Technical Data |
| Sheet Metal | 20-25 | Front Grill, Bonnet Assembly, Foot Step Assembly, Flat Car, Fender Assembly |
| Front Axle | 26-32 | Telescopic Axle, Toe-In Adjustment, Wheel Hub, Steering Components, Torque Tightening |
| Engine | 33-105 | Cylinder Block & Liner, Cylinder Head, Timing Case & Gears, Timing, Piston & Connecting Rod, Crank Shaft, Cam Shaft, Fly Wheel |
| Steering | 106-115 | Steering Gear Assembly, Dismantling, Inspection, Reassembly, Column Run-Out |
| Hydrostatic Steering | 116-125 | Hydraulic Distributor, Bleeding System, Steering Cylinder, Troubleshooting |
| Clutch | 126-138 | Gearbox Clutch, PTO Clutch, Internal Adjustment, External Adjustment, Troubleshooting |
| Front Gear Box | 139-147 | Gearbox Control Rods, Gearshift Forks, Speed Range Control, Troubleshooting |
| Rear Gear Box | 148-161 | Gearbox Case, Crown Wheel & Pinion, Differential Lock, Four-Star Differential, Troubleshooting |
| Rear Axle | 162-164 | Rear Axle Shafts, Epicyclic Reduction, Rear Support Assembly |
| Power Take Off | 165-166 | Rear PTO Gears, PTO Shaft Terminal, Engagement Control |
| Brakes | 167-176 | Service Brakes, Parking Brake, Master Cylinder, Bleeding System, Troubleshooting |
| Hydraulics | 177-198 | Hydraulic System, Power-Lift, Control Valve, Load Sensing, Troubleshooting |
| Hydraulic Linkage | 199-202 | Three Point Linkage, Top Link, Lift Rods, Stabilizer Chains |
| Electricals | 209-226 | Battery, Alternator, Starter Motor, Wiring Diagrams, Fuse Box |
| Instruments & Gauges | 227-234 | Hour Cum RPM Meter, Fuel Gauge, Temperature Gauge, Oil Pressure Gauge, Switches |
| Controls | 235-237 | Operator Compartment Controls, Gearshift Controls, LH Controls |
| Wheels and Tyres | 238-244 | Traction, Tyre Pressures, Ballasting, Rear Track Adjustment, Front Wheel Track Adjustment |
| Adhesive and Sealants | 286-304 | Surface Preparation, Curing Time, Application Examples, Sealant Chart |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil capacity | 7.50 L | p. 10 |
| Valves Tip Clearance | 0.25 mm (cold) | p. 6 |
| Coolant capacity | 8.00 L | p. 10 |
| Gear Box Cum Hydraulic capacity | 35.00 L | p. 10 |
| Cylinder head Mounting Capscrews (Step 1) | 20 Nm | p. 38 |
| Cylinder head Mounting Capscrews (Step 2) | 50 Nm | p. 38 |
| Clearance adjustment between valve and rocker arm (cold) | 0.30 mm | p. 45 |
| Engine oil type | 15W40 | p. 248 |
| Engine Capacity | 3000 CC | p. 6 |
| Injector Pressure | 180 + 8 bar | p. 6 |
| Hydraulic Pump Displacement | 14 cm3 | p. 178 |
| Pressure Relief Valve Setting | 180 + 10 kg/cm2 | p. 180 |
Same 393, 453, 503, 603, SAME 393, SAME 453, SAME 503, SAME 603 Common Problems This Manual Covers
Same 393 tractor engine cranks slowly on cold mornings and will not fire
Check battery terminals and ground strap for corrosion before condemning the starter; the electrical section starting on page 209 covers starter motor testing. Test injectors if cranking speed is good: opening pressure should be 180 + 8 bar. Work through the no-start chart before pulling the injection pump.
Manual Section: Engine TroubleshootingThree point hitch lifts slowly under load or stops partway with implement attached
Check the transmission oil level first; the gearbox and hydraulic system share one 35.00 L fill. Test system pressure at the relief valve, which should hold 180 + 10 kg/cm2 as listed on page 180. If pressure is low with a known good pump, inspect the control valve in the hydraulics section starting on page 177.
Manual Section: Hydraulics Troubleshooting p. 180Loud tappet noise from cylinder head with rough idle and low power at PTO speed
Adjust valve clearance with the engine cold; set clearance between valves and rockers to 0.25 mm as specified on page 53. Rotate each cylinder to TDC compression before setting. Recheck after torquing the head if the gasket was recently replaced, and follow the misfire chart if the noise persists.
Manual Section: Engine p. 53Gearbox whines in all speed ranges and shift lever is stiff between gears
Drain and inspect the transmission oil for metal before splitting the tractor; the gearbox and hydraulics share a combined 35.00 L fill listed on page 10. Check gearshift fork wear and control rod adjustment using the front gearbox procedures starting on page 139. Worn detents mimic bearing noise, so verify the linkage first.
Manual Section: Front Gear Box Troubleshooting p. 139Oil pressure warning light flickers at low idle once engine reaches operating temperature
Verify oil level and grade before tearing into the engine; fill with 7.50 L of 15W40 as listed on page 248. Replace the filter and retest with the engine hot. If the light still flickers, follow the low oil pressure diagnosis and inspect main bearing clearances in the engine section.
Manual Section: Engine TroubleshootingFrequently Asked Questions
What are the recommended service intervals for the tractor?
The tractor requires service at 50 hours (I Service), 350 hours (II Service), 650 hours (III Service), and 1000 hours (IV Service). Additionally, there are daily (10 hours) and weekly (50 hours) maintenance tasks, such as checking oil levels and tyre pressure, as well as major services every 300, 600, 1200, and 2400 hours. p. 251
What are the engine oil and cooling system fluid capacities?
The engine oil capacity is 7.50 liters, and the coolant capacity in the cooling system is 8.00 liters for the SAME 393 model, or 11.00 liters for the SAME 453, 503, and 603 models. p. 10
How can I troubleshoot if the engine does not start?
If the engine does not start, check for possible causes including an empty fuel tank (code 6), fault in stop control (code 7), restriction in a fuel pipe (code 8), fault in fuel lift pump (code 9), dirty fuel filter element (code 10), air in the fuel system (code 12), or incorrect atomizers (code 13). Workshop personnel should further check valve timing (code 34) and compression (code 35). p. 103
What is the specified valve tip clearance for the engine?
The valve tip clearance for the engine is specified as 0.25 mm when the engine is cold. p. 6
What is the torque specification for the cylinder head mounting capscrews?
The cylinder head mounting capscrews are tightened in a multi-step sequence: Step #1 to 20 Nm (2.0 Kgm), Step #2 to 50 Nm (5.0 Kgm), followed by two additional steps of 45 degrees each, for a total of 90 degrees. p. 38
What do I get after purchasing this Same 393, 453, 503, 603 manual?
A 304-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Are there any print restrictions on this Same 393, 453, 503, 603 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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