2000 Daewoo Doosan D430 Diesel Engine Factory Service & Repair Manual (P/N SB4035E00)

This Daewoo Doosan factory service and repair publication, SB4035E00, covers the D430 four-cylinder diesel engine used in 1760XL (DSL802) and 2060XL (DSL902) skid steer loaders. Coverage is limited to the engine and related systems; this is not a complete loader service manual.

Text search and diagram detail: The main text is searchable, but some labels and tool numbers within illustrations are not. There are no embedded PDF bookmarks. Small starting-circuit and glow-plug-relay labels are readable when enlarged.

• Engine repair: Engine disassembly and assembly, cylinder-head and valve work, liner replacement, crankshaft inspection, timing-gear checks, and compression testing.

• Lubrication system: Oil-pump disassembly, rotor-clearance inspection, pressure-relief-valve operation, oil-pressure testing, and filter service.

• Cooling system: Radiator pressure testing, thermostat inspection, water-pump overhaul, and V-belt tension adjustment.

• Fuel system: VE injection-pump removal and installation, timing adjustment, air-bleeding, fuel-cut magnet-valve checks, and injection-nozzle testing.

• Electrical diagnosis: Starting-circuit troubleshooting, alternator and starter repair, magnetic-switch tests, and glow-plug and relay checks.

• Workshop references: Component wear limits, machining tolerances, tightening torques, electrical test specifications, exploded views, and special-tool identification.

This manual is suited to mechanics experienced in diesel engine overhaul and equipped for precision measurement, press work, and injector testing.

Short Block and Cylinder Head Clearances

The inspection sections cover cylinder-head distortion, combustion-chamber insert replacement, valve-guide service, valve-seat refacing, and valve-spring rejection limits. Piston, ring, and camshaft inspection data accompany warm-engine valve-clearance and timing-gear-backlash specifications.

Crankshaft repair data include main-journal dimensions, bearing-selection charts, and Plastigauge oil-clearance checks. The standard-bearing chart pairs bearing colors with journal sizes and housing marks, helping identify the correct combination before replacement bearings are selected.

Liner Replacement and Assembly Tools

The liner replacement procedure covers pressing and seating new liners without post-installation honing. The inspection section also states that these liners cannot be honed or rebored; incorrect pressing can distort the liner.

Factory tool references include the 49 0636 060 ring gear brake and 49 0636 245 timing-cover centering tool. Incorrect timing-cover alignment can damage the oil seal during crankshaft-pulley installation and cause leakage.

Lubrication and Cooling

The Lubricating Circuit (Fig. 2-1) traces oil through the filter, cooler, and engine galleries. Oil-pump inspection covers rotor clearances and end float, with separate pressure-switch and pressure-relief-valve information.

The Cooling Circuit (Fig. 3-1) accompanies radiator leak checks and wax-pellet thermostat opening and lift specifications. Disassembling Water Pump (Fig. 3-10) identifies the shaft, bearings, impeller, and seal assembly.

VE Fuel Injection and Nozzle Testing

Construction of VE Injection Pump (Fig. 4-5) identifies the timing device, plunger, and magnet valve. The specifications cover the mechanical all-speed governor and cam lift, while the timing procedures use a dial indicator.

Throttle-type injector service covers nozzle-holder disassembly, opening-pressure adjustment, spray evaluation, and needle-valve and seat leak testing. Internal injection-pump disassembly, inspection, and adjustment require the pump manufacturer's separate service manual; those procedures are outside this publication's scope.

Starting, Charging, and Preheating

Checking Starting Circuit (Fig. 5-17) shows ignition-switch connections and starter terminals. The troubleshooting chart distinguishes slow cranking, failure to start, pinion engagement faults, battery discharge, and overcharging, helping narrow down the affected circuit before component removal.

The 12V system's 60A alternator is covered through stator, rotor, diode, and brush tests, plus no-load and load specifications. Testing for the 2.5kW starter covers magnetic-switch pull-in, holding, and return functions, armature and field-coil checks, free-running tests, and lock-test data.

Checking Glow Plug Relay (Fig. 5-33) supplies the preheating-circuit schematic. Observe the manual's safety precautions when handling heavy engine components or testing high-pressure fuel equipment.

PDF Contents and Page Count

Supplied as one printable English PDF. The 67-page PDF contains 61 pages of engine procedures and technical data, one cover, one safety page, one index page, and three blank pages, all included in the total.