Textron MPE 850 OFF-ROAD User Manual

TD410023
Rev B
18.04.2017
MPE 850 OFF-ROAD
– 409135 I2 846 UTV NA-80
– 410750 I2 846 UTV NA-80
This repair manual is valid for the following engine models:
en_English
REPAIR MANUAL
4-Stroke Engine
Read the introductory chapter before performing the task on the engine.
Pay particular attention to the safety messages.

Textron MPE 850 OFF-ROAD Specifications

General

Brand	Textron
Model	MPE 850 OFF-ROAD
Category	Engine
Language	English

Summary

Safety

Safety Alert Symbol and Signal Words

Defines the safety alert symbol and signal words (Warning, Caution) to convey danger levels.

Important Safety Messages

Highlights critical safety instructions regarding components, work practices, and personnel.

Before You Begin Working

Engine Identification

Instructions on how to identify the engine model using part and serial numbers.

Engine Components

Identifies key components of the engine with corresponding labels in diagrams.

Workshop Equipment

Lists the necessary workshop equipment and special tools required for engine repair.

Workshop Equipment and Tools

Details common workshop equipment and tools required for various engine tasks.

Supplies

Lists recommended supplies and consumables needed for engine maintenance and repair.

Section A – Engine Disassembly

Engine Removal and Securing

Procedures for safely removing the engine from the vehicle and securing it.

Removing Generator Cover and Starter

Step-by-step guide to removing the generator cover and starter motor.

Removing Intake Manifold and Ignition Coils

Instructions for removing the intake manifold and ignition coil assemblies.

Removing Spark Plugs and Valve Cover

Details on how to remove spark plugs and the engine valve cover.

Removing Rocker Arms and Engine Mount

Removing Oil Cooler and Bracket

Removing Impeller and Crankshaft Cover

Removing Crankshaft Sensor and Generator/Stub Shaft

Removing Oil Pressure Pump

Removing Suction Pump Cover and Gear

Removing Timing Chain

Removing Cylinder Head

Removing Crank Drive

Removing Thermostat Housing and Chain Guide

Replacing Piston/Con Rod and Cylinder Liners

Procedures for replacing pistons, connecting rods, and cylinder liners.

Section B – Engine Resassembly

Engine Mounting and Oil Filter Replacement

Installing Chain Rail and Guide

Installing Thermostat Housing and Crank Drive

Installing Cylinder Head

Installing Timing Chain

Installing Suction Pump Components

Installing Crankshaft Oil Seal

Installing Oil Pressure Pump

Installing Generator and Stub Shaft

Installing Crankshaft Sensor and Cover

Installing Slide Ring Seal

Installing Impeller and Oil Cooler

Installing Rocker Arms and Valve Cover

Installing Spark Plugs and Ignition Coils

Installing Intake Manifold

Installing Starter

Installing Generator Cover

Final Engine Assembly and Checks

Procedures for completing assembly and performing final checks.

Section D – Specifications

Tightening Torques and Bolt Specifications

Lists tightening torques and assembly instructions for various bolts and components.

Screw-in Fittings and Liquid Sealing

Test Procedures and Adjustments

Covers procedures for testing and adjusting engine parameters.

Bearing Play and Valve Timing

Specifications for con rod bearing play, main bearing play, and valve timing.

Oil Pressure and Thermostat Specifications

Details on oil pressure testing and thermostat opening temperatures.

Crankshaft Sensing Wheel and Cam Spike