Deutz 912 & 913 Series Diesel Engine Workshop & Operation Manual PDF
The Deutz 912 and 913 series (F3L912, F4L912, F6L912, BF4L913, BF6L913) are the industry benchmark for modular air-cooled diesel engines in agricultural tractors, mining haulers, compressors, and generator sets. This official workshop operation guide provides complete valve lash clearances, cylinder head torques, fuel injection timing, and cooling blower maintenance.
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Document Format: Clean Searchable PDF (84 Pages, 3.77 MB) • Price: $0.00 (100% Free Direct Download) • Brand Hub: Deutz Diesel Engines & Equipment
1. Comprehensive Engine & System Technical Specifications
Use the reference engineering specifications, fastener tightening torques, and service clearances below during overhaul, cylinder head assembly, and preventive maintenance:
| Engineering Parameter / Component | Factory OEM Specification / Torque Value |
|---|---|
| Engine Models Covered | Deutz FL 912 & BFL 913 (3, 4, 6 Cylinder Inline Models) |
| Cooling Method | Direct Air Cooling via Axial Cooling Blower & Integrated Oil Cooler |
| Displacement per Cylinder | 912 Series: 0.94 Liters (57.4 cu in) / 913 Series: 1.02 Liters (62.2 cu in) |
| Bore x Stroke | 912: 100 mm x 120 mm / 913: 102 mm x 125 mm |
| Cylinder Head Bolt Torque | Step 1: 30 Nm -> Step 2: 45° -> Step 3: 45° -> Step 4: 45° (Torque Angle Method) |
| Connecting Rod Bolt Torque | Step 1: 30 Nm (22 ft-lbs) -> Step 2: Turn additional +60° |
| Main Bearing Cap Bolt Torque | Step 1: 50 Nm (37 ft-lbs) -> Step 2: Turn additional +60° |
| Intake Valve Lash Clearance (Cold) | 0.15 mm (0.006 in) Cold |
| Exhaust Valve Lash Clearance (Cold) | 0.15 mm (0.006 in) Cold |
| Injection Nozzle Opening Pressure | 175 + 8 bar (2,540 + 116 psi) Bosch / Deutz Injectors |
| Minimum Lube Oil Pressure (Hot Idle) | 1.0 bar (14.5 psi) / Rated Speed: 2.0 to 4.0 bar (29 to 58 psi) |
| Thermostat / Blower Cut-In Temp | 110°C to 115°C Cylinder Head Surface Sensor Range |
2. Complete Workshop Service Chapters & Systems Covered
- Section 1 — Technical Data & Operating Dimensions: Engine cross-section diagrams, air-cooling blower gear ratios, oil capacities, and tightening torques.
- Section 2 — Checking and Setting Clearances: Checking valve lash, adjusting decompression device, spill-port fuel injection timing, and belt tensioning.
- Section 3 — Cylinder Head, Valves & Individual Cylinder Jugs: Individual finned cylinder barrel replacement, cylinder head gasket shim selection, and pushrod tube sealing.
- Section 4 — Crankshaft, Pistons, Rods & Camshaft: Piston ring gap measurement, piston cooling nozzle inspection, and crankshaft end play limits.
- Section 5 — Cooling Blower, Fuel System & Lubrication: Hydraulic blower coupling overhaul, Bosch inline injection pump bleeding, and oil cooler matrix cleaning.
- Section 6 — Diagnostic Troubleshooting & Fault Finding: Hard starting in extreme cold, high cylinder temperature warnings, black smoke diagnosis, and oil pressure drop.
3. Critical Overhaul & Field Troubleshooting Guidelines
Technician Note: Deutz 912 and 913 engines utilize individual cylinder barrels and heads. When reassembling, always measure cylinder jug protrusion and use the correct copper gasket shim thickness to achieve the factory clearance volume of 1.0 to 1.2 mm.
4. Frequently Asked Questions (FAQ)
What is the valve lash clearance for Deutz FL912 and BFL913?
Both intake and exhaust valve clearances are set to 0.15 mm (0.006 in) with the engine cold.
What is the cylinder head tightening sequence on Deutz 912?
Deutz head bolts are tightened in four progressive torque-angle steps: Stage 1 to 30 Nm, followed by three consecutive 45-degree angle turns.
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