Crankshaft reconditioning is the toughest work in this 355-page Cummins L10 repair manual PDF (OEM ID 3810310-01): magnetic particle inspection, rod and main bearing journal grinding, balancing and polishing for the L10 and M11 engines. Beyond the crank, your block work runs through coiled and blind thread inserts, camshaft bore machining with bushings and salvage sleeves, main bearing bore repair, and liner counterbore cutting with manual or electric tools. Cylinder head chapters cover resurfacing, oversize valve guides, seat grinding and injector sleeve replacement. Exploded views and torque tables support the procedures. Hold liner protrusion at 0.00 mm to 0.13 mm [0.000 inch to 0.005 inch], and leave at least 99.24 mm [3.907 inch] of head thickness after resurfacing. Before ordering liner shims or oversize valve seat inserts, you can confirm which repair the block or head calls for. Bought once, the bookmarked, text-searchable file stays yours for this engine, liner clearances and resurfacing limits included.
What's Inside This Cummins L10, M11 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 5-18 | General Safety Instructions, General Repair Instructions, General Cleaning Instructions |
| General Repairs | 19-68 | Coiled Thread Inserts, Closed End Blind Inserts, Keylock Open End Thread Inserts |
| Camshaft Bore Repair | 69-95 | Camshaft Bore Cutting Tool, Camshaft Bushing, Salvage Sleeve, Camshaft Bore Machining |
| Piston Cooling Nozzle and Viscosity Sensor | 96-99 | Piston Cooling Nozzle Thread Repair, Viscosity Sensor Installation |
| Main Bearing Capscrew and Bore Repair | 100-140 | Main Bearing Capscrew Thread Repair, Main Bearing Bore Repair, Cylinder Block Idler Shaft Ring Dowel Bore Repair |
| Cylinder Liner Counterbore Machining | 141-163 | Manual Cutting Tool, Electric Cutting Tool, Liner Shims, Cylinder Liner Protrusion |
| Crankshaft Inspection and Reconditioning | 164-294 | Magnetic Particle Inspection, Grinding Connecting Rod Bearing Journals, Grinding Main Bearing Journals, Crankshaft Balancing, Polishing |
| Cylinder Head | 295-343 | Cylinder Head Resurfacing, Oversize Valve Guides, Oversize Valve Seat Inserts, Valve Seats Grinding, Injector Sleeve Replacement |
| Additional Service Literature | 344-349 | Service Products Catalog, Control Parts List, Parts Reuse Guidelines, Standard Repair Times, Shop Manuals, Troubleshooting and Repair Manuals |
| Component Manufacturers | 350-353 | Air Compressors, Alternators, Clutches, Governors, Hydraulic and Power Steering Pumps, Torque Converters |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Lubricating Oil Pump Mounting Capscrew Hole Drill Bit Size | 8.4 mm [21/64 inch] | p. 132 |
| Cylinder Liner Protrusion | 0.00 mm to 0.13 mm [0.000 inch to 0.005 inch] | p. 150 |
| Cylinder Liner to Cylinder Block Clearance | 0.25 mm [0.010 inch] minimum | p. 151 |
| Cylinder head resurfacing - maximum material removed per cut | 0.13 mm [0.005 inch] | p. 302 |
| Cylinder head resurfacing - minimum thickness after machining | 99.24 mm [3.907 inch] | p. 302 |
| Fixed Time Injector Hold Down with M10 x 1.50 Capscrews Torque | Step 1: 6 N·m [55 in-lb], Step 2: 12 N·m [110 in-lb], Step 3: 19 N·m [165 in-lb] | p. 304 |
| Fixed Time Injector Hold Down with M8 x 1.25 Capscrews Torque | Step 1: 5 N·m [45 in-lb], Step 2: 10 N·m [90 in-lb], Step 3: 15 N·m [130 in-lb] | p. 304 |
| Crankshaft Balance (per end) | 72 g·cm | p. 293 |
| Crankshaft Rotation Speed (Balancing) | 325 RPM | p. 287 |
| Crankshaft Rotation Speed (Grinding) | 50 RPM | p. 248 |
| Crankshaft Coolant Temperature | 13 to 24°C | p. 247 |
Cummins L10, M11 Common Problems This Manual Covers
Cummins L10 M11 cylinder head combustion face out of flatness or parallelism at rebuild inspection
Measure flatness across AA and BB against 0.200 mm [0.008 inch] max and CC against 0.076 mm [0.003 inch] max on page 303, then check parallelism against 0.10 mm [0.004 inch] max. Resurface following page 302, removing no more than 0.13 mm [0.005 inch] per cut, holding 99.24 mm [3.907 inch] minimum thickness and a 3.2 µm [125 µ inch] finish or less.
Manual Section: Cylinder Head Resurfacing p. 302Cylinder liner protrusion measures outside specification after installing the liner in the counterbore
Tighten the liner forcing screw to 136 N·m [100 ft-lb] without an impact wrench; page 150 warns excessive torque will damage the liner installation tool. Measure protrusion at four points 90 degrees apart against 0.00 to 0.13 mm [0.000 to 0.005 inch]. Check counterbore depth against 99.930 to 100.000 mm original, never exceeding 103.17 mm [4.062 inch] after any cut (page 153).
Manual Section: Cylinder Liner Counterbore Machining p. 150Engine component capscrew hole with failed or mutilated internal threads needing a coiled thread insert
Wear protective goggles when drilling metal (page 26). Drill to the chart size with cutting oil, for example 10.5 mm for M10 x 1.50 per page 28, and drill to the bottom of blind holes. Tap with the specified special tap, clean the hole, install the insert one-fourth to one-half thread below the surface, then break off the tang.
Manual Section: Coiled Thread Inserts p. 26Lubricating oil pump mounting capscrew hole threads damaged in the cylinder block
Wear protective goggles when drilling metal, then drill the capscrew hole with cutting oil and an 8.4 mm [21/64 inch] bit all the way through the oil pump mounting flange (page 132). Do not use compressed air here; page 133 warns debris will be blown into the engine. Clear chips with chip removal unit ST-1272-11 and set the coiled insert one-fourth to one-half thread below the mounting surface.
Manual Section: Main Bearing Capscrew and Bore Repair p. 132Camshaft bore damage with discolored or darkened paint on the outside of the cylinder block
Steam clean the block wearing protective clothing and safety glasses or a face shield (page 82), then dry with compressed air. Inspect the block exterior for discoloration or darkened paint, which means the camshaft bore saw high temperatures. Cut the bore with cutting oil and do not force the cut; let the drive unit control feed speed (page 91), then fit a salvage sleeve.
Manual Section: Camshaft Bore Repair p. 82Injector tip protrusion out of specification after injector sleeve replacement in the cylinder head
Remove the old injector sleeve, install the new one and torque the sleeve expander to 9 N·m [75 in-lb] following page 335, then cut the injector seat. Torque M10 x 1.50 fixed time hold down capscrews in three steps: 6, 12, then 19 N·m. Measure tip protrusion against 2.29 to 2.54 mm [0.090 to 0.100 inch] on page 304.
Manual Section: Injector Sleeve Replacement p. 335Frequently Asked Questions
What is the torque value for the viscosity sensor installation on a Cummins L10, M11 engine?
The torque value for installing the viscosity sensor (Part No. 3899509) into the cylinder block is 1 N•m [10 in-lb]. p. 99
What is the required torque for the main bearing caps on the Cummins L10, M11 during the alignment inspection?
When installing the main bearing caps for the alignment inspection, the torque sequence is: Step 1: 70 N•m [50 ft-lb], Step 2: 140 N•m [105 ft-lb], Step 3: 210 N•m [155 ft-lb], Step 4: Loosen, Step 5: 70 N•m [50 ft-lb], Step 6: 140 N•m [105 ft-lb], and Step 7: 210 N•m [155 ft-lb]. p. 166
What is the maximum allowable runout for the crankshaft gear journal?
The maximum allowable total indicator runout (TIR) for the crankshaft gear journal is 0.030 mm [0.0012 inch]. p. 232
What is the required clearance for the cylinder liner to cylinder block casting points on a Cummins L10, M11?
The cylinder liner to cylinder block clearance at the four block casting points must be a minimum of 0.25 mm [0.010 inch]. p. 151
Will this Cummins L10 Repair Manual download right away?
Immediate download of the complete 355-page searchable Repair Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Cummins L10 Repair Manual printable?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
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