This is the complete factory Parts Manual for the Gehl 803 Compact Excavator.This Manual has easy-to-read text sections with top quality diagrams and instructions.They are specifically written for the do-it-yourselfer as well as the experienced mechanic.With step by step instruction & highly detailed exploded pictures & diagrams to show you how to complete the required job correctly & efficiently Using. Gehl 803 Compact Excavator Parts Manual covers every single detail on your machine.provides step-by-step instructions based on the complete disassembly of the machine.This repair manual is an inexpensive way to keep you vehicle working properly. Form No. : 918076 Revision C May 2008 Manual Covers: Introduction..................... Inside Front Cover Table of Contents.........................................1 Decal Locations ...........................................4 Diesel Engine - Tier III ................................8 Diesel Engine - Tier II .................................9 Engine Mounts - Tier III............................10 Engine Mounts - Tier II .............................11 Cylinder Head, Valve Cover......................12 Cylinder Block...........................................13 Seal - Crankshaft - Tier III.........................14 Seal - Crankshaft - Tier II ..........................15 Oil Pan - Tier III ........................................16 Oil Pan - Tier II..........................................17 Camshaft - Tier III .....................................18 Camshaft - Tier II ......................................19 Crankshaft, Piston - Tier III.......................20 Crankshaft, Piston - Tier II ........................21 Lubrication - Tier III..................................22 Lubrication - Tier II ...................................23 Cooling System - Tier III...........................24 Cooling System - Tier II ............................25 Fuel Injection System - Tier III .................26 Fuel Injection System - Tier II...................27 Engine Air Filter - Tier III .........................28 Engine Air Filter - Tier II ..........................29 Intake Manifold - Tier III...........................30 Intake Manifold - Tier II ............................31 Exhaust Components - Tier III ..................32 Exhaust Components - Tier II....................33 Diesel Tank ................................................34 Hydraulic Pump Drive ...............................35 Fuel Supply - Tier III .................................36 Fuel Supply - Tier II ..................................37 Auto Idle/Throttle - Tier III .......................38 Throttle Lever - Tier II...............................39 Radiator - Tier III.......................................40 Radiator - Tier II ........................................41 Turntable Drive Unit Installation...............44 Turntable Drive Unit..................................46 Oil Cooler ..................................................47 Pilot Control Drive Unit ............................48 Drive Motor Installation ............................50 Drive Motor (Mag 50) ...............................52 Drive Motor (Mag 44) ...............................53 Hydraulic Oil Tank ....................................55 Hydraulic Pump .........................................58 Hydraulic Pump Components....................59 Control Valve Fittings ...............................60 Control Valve Assembly............................62 Pilot Oil Supply Unit .................................63 Cut-Off Valve ............................................64 Swivel Joint................................................67 Joysticks.....................................................68 Pilot Valve, Travel.....................................70 Auxiliary Hydraulics - Pilot Valve ............72 Control Valve Fittings ...............................72 Dozer Blade Valve.....................................73 Proportional Valve (Option) ......................74 Selection Valve ..........................................75 ISO/SAE Valve..........................................76 Manifold Block ..........................................77 Valve Block ...............................................78 Manifold.....................................................80 Hydraulic Pump Installation ......................82 Boom Installation.......................................83 Boom Cylinder...........................................84 Dipper Arm Installation .............................86 Dipper Arm Cylinder .................................87 Bucket Installation - Short Dipper Arm.....88 Bucket Installation - Long Dipper Arm (Option)..................................................89 Bucket Cylinder .........................................90 Boom Offset Cylinder Installation.............92 Boom Offset Cylinder................................93 Dozer Blade Installation ............................94 Dozer Blade Cylinder ................................95 Auxiliary Hydraulics Installation...............96 Proportional Control (Option) ...................98 ISO/SAE Valve Installation.......................99 Hydraulic Tank Hoses .............................100 Pilot Pressure Hoses.................................102 Battery......................................................103 Dashboard ................................................104 Radio (Option) .........................................106 Horn .........................................................107 Relay Box ................................................108 Cab Work Lights - Front (Option)...........110 Cab Work Light - Rear (Option)..............112 Boom Work Light....................................113 Wire Harness - Engine.............................114 Wire Harness - Chassis, Engine...............115 Wire Harness - Chassis ............................117 Wire Harness - Oil Control......................118 Wire Harness - Armrest ...........................119 Wire Harness - Switch .............................120 Wire Harness - Work Light - Front..........122 Wire Harness - Cab..................................123 Wire Harness - Auto-Idle (Option) ..........124 Wire Harness - Proportional Control (Option)................................................126 Dozer Blade .............................................127 Undercarriage, Rubber Track...................128 Rubber Track ...........................................129 Undercarriage, Steel Track (Option)........130 Steel Track (Option) ................................131 Track Tensioner, Rubber Track ...............132 Track Tensioner, Steel Track (Option) ....134 Track Roller (Rubber Track) ...................136 Bottom Roller ..........................................137 Top Roller ................................................138 Top Roller ................................................139 Chassis .....................................................140 Lubrication...............................................141 Counterweight..........................................142 Counterweight (Option)...........................144 Engine Hood - Tier III .............................145 Engine Hood - Tier II...............................146 Tank Cover ..............................................148 Partition Wall...........................................149 Isolation Mats ..........................................152 Undercarriage Cover................................155 Chassis Cover ..........................................156 Mirrors .....................................................158 Boom........................................................159 Dipper Arm - Short ..................................160 Dipper Arm - Long (Option) ...................162 Cab Mounting ..........................................164 Cab Frame 1.............................................165 Cab Frame 2.............................................168 Cab Door..................................................171 Windshield ...............................................172 Cabin Windows........................................175 Cab Trim ..................................................176 Operators Seat ........................................178 Heater.......................................................180 Air Condi