Need help?Do you have a question about the Universal M-25XP and is the answer not in the manual?
Engine specifications for Model M-12.
Engine specifications for Model M2-12.
Engine specifications for Model M3-20.
Engine specifications for Model M4-30.
Engine specifications for Model M-18.
Engine specifications for Model M-25.
Engine specifications for Model M-25XP.
Engine specifications for Model M-35.
Detailed specifications for engine parts.
Torque values for engine bolts.
Specifications related to the engine's main structure.
Cylinder head specifications and measurements.
Specifications for rocker arm components.
Specifications for camshaft components.
Specifications for cylinder liners.
Specifications for pistons and rings.
Fan belt installation and tensioning.
Heat exchanger specifications.
Thermostat specifications and operation.
Fuel filter specifications and testing.
Fuel pump specifications.
Fuel injection pump specifications.
Injection nozzle specifications.
Governor specifications.
Starter specifications.
Glow plug specifications.
AC dynamo specifications.
Regulator specifications.
Torque for head bolts and nuts.
Torque for bearing case bolts (1).
Torque for connecting rod bolts.
Torque for nozzle holders.
Torque for crankshaft nut.
Bolt material grades and identification.
General safety warnings for maintenance.
Schedule for regular maintenance checks.
Procedures for inspecting and changing engine fluids.
Important safety precautions during disassembly and servicing.
Table of service intervals for maintenance tasks.
Procedures for checking and changing engine oil.
Procedure for replacing the engine oil filter.
Procedure for inspecting the fuel filter.
Procedure for bleeding air from the fuel system.
Description of the engine's cylinder block.
Description of the engine's cylinder head.
Description of the crankshaft's function.
Description of pistons and rings.
Description of connecting rods.
Explanation of camshaft construction.
Description of the rocker arm assembly.
Description of valves.
Explanation of flywheel function and markings.
Covers lubrication system components and diagrams.
Details components of the cooling system.
Covers fuel system components.
Diagram illustrating the engine oil flow path.
Explains the function of the relief valve.
Explains the function of the by-pass valve.
Describes the oil pressure switch operation.
Explains the operation of the oil pump.
Describes the water pump's function and components.
Explains the thermostat's operation and types.
Overview of the fuel system components.
Details the function and replacement of the fuel filter.
Explains the fuel pump's operation.
Describes the K type mini fuel injection pump.
Explains the functions of the delivery valve.
Describes the pump element's construction.
Provides wiring diagrams for the electrical system.
General information about charging systems.
General information on alternators.
Schematic diagrams of alternators.
Procedure for rotating the alternator rear housing.
Correct belt alignment, installation, and tensioning.
Information on ammeter requirements and connection.
General procedures for testing alternator and regulator.
Test procedures for integral regulator systems.
Troubleshooting guide for integral regulator systems.
Section for determining problem areas in the charging system.
Tests for alternator and regulator.
Procedure for testing the diode-trio.
Procedure for testing the regulator.
Test for harness voltage.
Procedure to test alternator output.
Test procedures for remote regulator systems.
Troubleshooting guide for remote regulator systems.
Section for determining problem areas in the charging system.
Tests for alternator and regulator.
Procedure for testing the diode-trio.
Procedure for testing the regulator.
Procedure to test alternator output.
General procedure for alternator disassembly.
General procedure for alternator disassembly.
Steps for disassembling and testing the alternator.
Procedure to remove the brush holder.
Inspecting and testing the brush assembly.
Procedure to remove the integral voltage regulator.
Procedure to remove diode-trio and rectifier bridge.
Separating stator from front housing.
Inspecting the rear housing for damage.
Testing the stator windings for continuity.
Procedure to remove pulley, fan, and spacer.
Inspecting the pulley for faults.
Separating the rotor from the front housing.
Procedure to remove the front bearing.
Inspecting and testing the rotor assembly.
Testing rotor winding current draw and resistance.
Checking slip rings/windings for grounding.
Inspecting rotor shaft and pole pieces.
Procedure to remove slip rings.
Procedure to remove the rear bearing.
General guidelines for alternator reassembly.
Procedure to install the rear bearing.
Procedure to install the slip ring assembly.
Procedure to install the front bearing.
Procedure to assemble rotor and front housing.
Procedure to install spacer, fan, and pulley.
Procedure to assemble front and rear housings.
Installing diode rectifier bridge and diode trio.
Installing the integral voltage regulator.
Procedure to install the brush assembly.
Procedure to install the rear cover.
Tests to determine alternator output capability.
Information on the starter system.
Details the magnet-switch type starter.
Describes starter operation when button is released.
Explains the purpose and type of glow plugs.
Procedures for disassembling cylinder components.
Procedures for disassembling the nozzle holder.
Procedures for disassembling the injection pump.
Procedures for disassembling gear case, timing gear, etc.
Procedures for disassembling pistons and crankshaft.
Procedures for disassembling pistons and connecting rods.
Procedures for replacing valve guides, bushings, and bearings.
Procedures for removing the cylinder head cover and pipes.
Procedure to remove nozzle holder assemblies.
Procedure to remove the rocker arm.
Procedure to remove cylinder heads.
Procedure to remove O-rings.
Procedure to remove valves.
Procedure to disassemble the nozzle holder.
Procedure to remove the injection pump cover.
Procedure to remove the injection pump.
Procedure to detach the governor spring.
Procedure to detach the start spring.
Procedure to remove the gear case.
Procedure to remove the idle gear.
Procedure to remove gear and camshaft.
Procedure to remove the fuel camshaft.
Procedure to remove the oil pump.
Procedure to remove the oil pan.
Procedure to remove the oil filter.
Procedure to remove connecting rod caps.
Procedure to remove pistons.
Procedure to remove the flywheel.
Procedure to remove the main bearing case.
Procedure to remove the cylinder liner.
Procedure to remove the thermostat.
Procedure to remove the water pump.
Procedure to check cylinder head flatness.
Procedure to check cylinder head surface for flaws.
Procedure for repairing the valve seat.
Procedure to check valve recessing.
Procedure to check guide clearance.
Procedure to check valve spring free length.
Procedure to check valve spring squareness.
Procedure to check valve spring tension.
Procedure to check oil clearance for rocker arm shaft.
Procedure to check piston top clearance.
Procedure to adjust valve clearance.
Procedure to adjust compression release.
Procedure to test nozzle opening pressure.
Procedure to check nozzle valve seat tightness.
Procedure to check injection pump plunger tightness.
Procedure to check delivery valve tightness.
Procedure for adjusting injection timing.
Procedure to check camshaft oil clearance.
Procedure to check camshaft alignment.
Procedure to check cam heights.
Procedure to check gear backlash.
Procedure to test oil pressure.
Procedure to check oil pump rotor lobe clearance.
Procedure to check radial clearance.
Procedure to check end clearance.
Procedure to check piston boss diameter.
Procedure to check piston pin/bushing clearance.
Procedure to check piston ring clearance.
Procedure to check ring side clearance.
Procedure to check connecting rod alignment.
Procedure to check crankshaft alignment.
Check oil clearance for crankshaft journal/bearing 1.
Check oil clearance for crankshaft journals/bearings 2.
Check oil clearance for crank pins/bearings.
Procedure to check crankshaft end play.
Procedure to check cylinder liner wear.
Precautions for using undersize/oversize bearings.
Checks related to battery charging current and dynamo voltage.
Testing procedures for starter and glow plugs.
Procedures for starter disassembly and servicing.
Procedures for checking battery charging current and dynamo voltage.
Troubleshooting and testing for starter and glow plugs.
Procedure for no-load testing of the starter.
Procedure for testing the starter motor.
Test for the pull-in coil of the magnet switch.
Test for the holding coil retention.
Test for magnet switch plunger return.
Checking glow plugs for breakage and short circuits.
General starter disassembly procedures.
Procedure to remove the magnet switch.
Procedure to remove the armature brake.
Procedure to remove the end frame.
Procedure to remove the brush holder.
Procedure to remove the yoke.
Procedure to remove the armature.
Procedures for servicing the starter.
Procedure to check and adjust pinion gap.
Checking gap between shaft and brush.
Checking armature coil for grounding.
Procedure to check commutator wear.
Checking commutator for staining or burning.
Checking mica undercut depth.
Checking field coil for breakage.
Checking insulation between field coil and yoke.
Checking brush wear.
Checking brush spring tension.
Checking brush holder insulation.
Troubleshooting steps for engine not turning normally.
Troubleshooting steps for insufficient engine output.
Troubleshooting for abnormal exhaust fumes color.
Troubleshooting for excessive lubricant consumption.
Troubleshooting for lubricant level increasing.
Engine specifications for Model M-12.
Engine specifications for Model M2-12.
Engine specifications for Model M3-20.
Engine specifications for Model M4-30.
Engine specifications for Model M-18.
Engine specifications for Model M-25.
Engine specifications for Model M-25XP.
Engine specifications for Model M-35.
Detailed specifications for engine parts.
Torque values for engine bolts.
Specifications related to the engine's main structure.
Cylinder head specifications and measurements.
Specifications for rocker arm components.
Specifications for camshaft components.
Specifications for cylinder liners.
Specifications for pistons and rings.
Fan belt installation and tensioning.
Heat exchanger specifications.
Thermostat specifications and operation.
Fuel filter specifications and testing.
Fuel pump specifications.
Fuel injection pump specifications.
Injection nozzle specifications.
Governor specifications.
Starter specifications.
Glow plug specifications.
AC dynamo specifications.
Regulator specifications.
Torque for head bolts and nuts.
Torque for bearing case bolts (1).
Torque for connecting rod bolts.
Torque for nozzle holders.
Torque for crankshaft nut.
Bolt material grades and identification.
General safety warnings for maintenance.
Schedule for regular maintenance checks.
Procedures for inspecting and changing engine fluids.
Important safety precautions during disassembly and servicing.
Table of service intervals for maintenance tasks.
Procedures for checking and changing engine oil.
Procedure for replacing the engine oil filter.
Procedure for inspecting the fuel filter.
Procedure for bleeding air from the fuel system.
Description of the engine's cylinder block.
Description of the engine's cylinder head.
Description of the crankshaft's function.
Description of pistons and rings.
Description of connecting rods.
Explanation of camshaft construction.
Description of the rocker arm assembly.
Description of valves.
Explanation of flywheel function and markings.
Covers lubrication system components and diagrams.
Details components of the cooling system.
Covers fuel system components.
Diagram illustrating the engine oil flow path.
Explains the function of the relief valve.
Explains the function of the by-pass valve.
Describes the oil pressure switch operation.
Explains the operation of the oil pump.
Describes the water pump's function and components.
Explains the thermostat's operation and types.
Overview of the fuel system components.
Details the function and replacement of the fuel filter.
Explains the fuel pump's operation.
Describes the K type mini fuel injection pump.
Explains the functions of the delivery valve.
Describes the pump element's construction.
Provides wiring diagrams for the electrical system.
General information about charging systems.
General information on alternators.
Schematic diagrams of alternators.
Procedure for rotating the alternator rear housing.
Correct belt alignment, installation, and tensioning.
Information on ammeter requirements and connection.
General procedures for testing alternator and regulator.
Test procedures for integral regulator systems.
Troubleshooting guide for integral regulator systems.
Section for determining problem areas in the charging system.
Tests for alternator and regulator.
Procedure for testing the diode-trio.
Procedure for testing the regulator.
Test for harness voltage.
Procedure to test alternator output.
Test procedures for remote regulator systems.
Troubleshooting guide for remote regulator systems.
Section for determining problem areas in the charging system.
Tests for alternator and regulator.
Procedure for testing the diode-trio.
Procedure for testing the regulator.
Procedure to test alternator output.
General procedure for alternator disassembly.
General procedure for alternator disassembly.
Steps for disassembling and testing the alternator.
Procedure to remove the brush holder.
Inspecting and testing the brush assembly.
Procedure to remove the integral voltage regulator.
Procedure to remove diode-trio and rectifier bridge.
Separating stator from front housing.
Inspecting the rear housing for damage.
Testing the stator windings for continuity.
Procedure to remove pulley, fan, and spacer.
Inspecting the pulley for faults.
Separating the rotor from the front housing.
Procedure to remove the front bearing.
Inspecting and testing the rotor assembly.
Testing rotor winding current draw and resistance.
Checking slip rings/windings for grounding.
Inspecting rotor shaft and pole pieces.
Procedure to remove slip rings.
Procedure to remove the rear bearing.
General guidelines for alternator reassembly.
Procedure to install the rear bearing.
Procedure to install the slip ring assembly.
Procedure to install the front bearing.
Procedure to assemble rotor and front housing.
Procedure to install spacer, fan, and pulley.
Procedure to assemble front and rear housings.
Installing diode rectifier bridge and diode trio.
Installing the integral voltage regulator.
Procedure to install the brush assembly.
Procedure to install the rear cover.
Tests to determine alternator output capability.
Information on the starter system.
Details the magnet-switch type starter.
Describes starter operation when button is released.
Explains the purpose and type of glow plugs.
Procedures for disassembling cylinder components.
Procedures for disassembling the nozzle holder.
Procedures for disassembling the injection pump.
Procedures for disassembling gear case, timing gear, etc.
Procedures for disassembling pistons and crankshaft.
Procedures for disassembling pistons and connecting rods.
Procedures for replacing valve guides, bushings, and bearings.
Procedures for removing the cylinder head cover and pipes.
Procedure to remove nozzle holder assemblies.
Procedure to remove the rocker arm.
Procedure to remove cylinder heads.
Procedure to remove O-rings.
Procedure to remove valves.
Procedure to disassemble the nozzle holder.
Procedure to remove the injection pump cover.
Procedure to remove the injection pump.
Procedure to detach the governor spring.
Procedure to detach the start spring.
Procedure to remove the gear case.
Procedure to remove the idle gear.
Procedure to remove gear and camshaft.
Procedure to remove the fuel camshaft.
Procedure to remove the oil pump.
Procedure to remove the oil pan.
Procedure to remove the oil filter.
Procedure to remove connecting rod caps.
Procedure to remove pistons.
Procedure to remove the flywheel.
Procedure to remove the main bearing case.
Procedure to remove the cylinder liner.
Procedure to remove the thermostat.
Procedure to remove the water pump.
Procedure to check cylinder head flatness.
Procedure to check cylinder head surface for flaws.
Procedure for repairing the valve seat.
Procedure to check valve recessing.
Procedure to check guide clearance.
Procedure to check valve spring free length.
Procedure to check valve spring squareness.
Procedure to check valve spring tension.
Procedure to check oil clearance for rocker arm shaft.
Procedure to check piston top clearance.
Procedure to adjust valve clearance.
Procedure to adjust compression release.
Procedure to test nozzle opening pressure.
Procedure to check nozzle valve seat tightness.
Procedure to check injection pump plunger tightness.
Procedure to check delivery valve tightness.
Procedure for adjusting injection timing.
Procedure to check camshaft oil clearance.
Procedure to check camshaft alignment.
Procedure to check cam heights.
Procedure to check gear backlash.
Procedure to test oil pressure.
Procedure to check oil pump rotor lobe clearance.
Procedure to check radial clearance.
Procedure to check end clearance.
Procedure to check piston boss diameter.
Procedure to check piston pin/bushing clearance.
Procedure to check piston ring clearance.
Procedure to check ring side clearance.
Procedure to check connecting rod alignment.
Procedure to check crankshaft alignment.
Check oil clearance for crankshaft journal/bearing 1.
Check oil clearance for crankshaft journals/bearings 2.
Check oil clearance for crank pins/bearings.
Procedure to check crankshaft end play.
Procedure to check cylinder liner wear.
Precautions for using undersize/oversize bearings.
Checks related to battery charging current and dynamo voltage.
Testing procedures for starter and glow plugs.
Procedures for starter disassembly and servicing.
Procedures for checking battery charging current and dynamo voltage.
Troubleshooting and testing for starter and glow plugs.
Procedure for no-load testing of the starter.
Procedure for testing the starter motor.
Test for the pull-in coil of the magnet switch.
Test for the holding coil retention.
Test for magnet switch plunger return.
Checking glow plugs for breakage and short circuits.
General starter disassembly procedures.
Procedure to remove the magnet switch.
Procedure to remove the armature brake.
Procedure to remove the end frame.
Procedure to remove the brush holder.
Procedure to remove the yoke.
Procedure to remove the armature.
Procedures for servicing the starter.
Procedure to check and adjust pinion gap.
Checking gap between shaft and brush.
Checking armature coil for grounding.
Procedure to check commutator wear.
Checking commutator for staining or burning.
Checking mica undercut depth.
Checking field coil for breakage.
Checking insulation between field coil and yoke.
Checking brush wear.
Checking brush spring tension.
Checking brush holder insulation.
Troubleshooting steps for engine not turning normally.
Troubleshooting steps for insufficient engine output.
Troubleshooting for abnormal exhaust fumes color.
Troubleshooting for excessive lubricant consumption.
Troubleshooting for lubricant level increasing.
To Next Page
General
