2001 Mitsubishi L-Series Diesel Engine Service Manual: L2A, L2C, L2E, L3A, L3C, L3E (P/N 99619-15180)

This Mitsubishi Heavy Industries L-Series service manual, publication 99619-15180 (April 2001), covers the L2A, L2C, L2E, L3A, L3C, and L3E diesel engines in agricultural, industrial, and export configurations. Its technical coverage follows the May 1997 engine specifications described in the foreword; later specification changes are outside this edition's scope.

Search, bookmarks and wiring detail: Text search is unavailable; embedded page bookmarks have blank labels. Small labels in the standard-engine, Key-OFF stop, and glow-timer diagrams are readable when enlarged.

• Engine repair: Cylinder-head and valve-seat work, rocker-shaft inspection, timing-gear installation, valve and injection-pump camshaft service, and piston, connecting-rod, and crankshaft inspection.

• Fuel system: Bosch NC injection-pump disassembly and assembly, fuel-system bleeding, injection-timing adjustment, and injection-nozzle opening-pressure, chattering, and spray tests.

• Governor system: Mechanical centrifugal-governor inspection, lever and shaft service, and model-specific torque-spring installation, adjustment, and spring-load checks.

• Lubrication and cooling: Gear-type oil-pump inspection, oil-pressure-switch checks, water-pump replacement, wax-type thermostat testing, and temperature-gauge and thermoswitch checks.

• Electrical repair: Starter and alternator overhaul, AC dynamo and regulator testing, glow-plug checks, and Key-OFF stop and glow-timer wiring diagrams.

• Troubleshooting: Diagnostic charts for hard starting, knocking, overheating, black-smoky exhaust, unsteady idling, and low output, supported by cylinder-compression testing.

Mitsubishi prepared this manual for service mechanics working on L-Series engines.

Engine Diagnosis and Mechanical Repair

The trouble-diagnosis charts begin with likely or easy-to-check causes before moving to more involved tests. They help separate fuel-system faults from compression problems when symptoms such as hard starting or unsteady idling overlap.

Mechanical coverage extends to valve-guide replacement, cylinder-block reboring, crankshaft undersize data, and piston-ring fit and orientation. Excessive force during piston installation can break the rings, a specific caution in the assembly instructions.

Exploded assembly views and cylinder-head bolt-tightening sequences support component identification and reassembly. Reference illustrations also include L3C longitudinal and cross sections, governor sectional views, oil-pump/oil-filter sections, and L2/L3 performance curves.

Injection Equipment and Governor Adjustment

Fuel-feed arrangements include electromagnetic plunger pumps, electromagnetic diaphragm pumps, and mechanically driven pumps. Injection timing uses mounting-shim adjustment and model-specific timing tables; torque-spring coverage distinguishes single- and double-spring sets.

Nozzle service separates opening-pressure adjustment from chattering and spray-pattern evaluation, with illustrations of acceptable and defective spray. The disassembly notes warn that clamping the nozzle retaining nut in a vise can deform it.

Injection-pump readjustment and disassembly require a pump tester; checking delivery after plunger-barrel or delivery-valve replacement also requires a cam box.

Lubrication, Cooling and Air Intake

Oil data distinguishes standard and deep sumps and excludes the filter's oil allowance from the listed sump capacities. Gear-case and oil-pump inspection covers clearances, relief components, and pump performance.

Cooling-system repair covers water-pump assembly replacement and separate checks for the thermostat, temperature-gauge unit, and thermoswitch. Thermostat data distinguishes the 76.5°C and 71°C specifications. Air-cleaner inspection addresses element condition and leaks at the housing, packing, and intake hose.

Starting, Charging and Engine Controls

Starter repair includes magnetic-switch testing, armature and brush inspection, and pinion-shaft end-play adjustment. Alternator coverage addresses rectifier diodes, field and stator coils, regulated voltage, and output; the AC dynamo uses a separate regulator/rectifier.

Wiring diagrams distinguish standard charging arrangements, L2 Key-OFF stop installations with an AC dynamo, and L2/L3 glow-timer configurations. ETS push-type and ETR pull-type fuel-cutoff solenoids have separate service information. The glow-timer section provides connector details, a test circuit, and an operation chart.

Workshop Specifications and Tools

Component-specific torque and sealant charts accompany wear limits, clearance specifications, electrical test values, and the periodic service chart. Identified tools include piston-pin setting tool ST332400, compression-gauge adapter ST332270, and oil-pressure-switch socket wrench MD998054.

Verify engine compatibility before repair work, and observe the manual's precautions for rotating components and hot-fluid testing.

Printable PDF and Included Pages

The manual is supplied as one printable 147-page PDF: 136 pages of technical material and section contents, five pages comprising the front cover, foreword, main contents, spine label, and back cover, plus six blank pages. All cover material and blank pages are included in the total.