Gehl M08 80M Compact Excavator Service Manual 50940518 – PDF DOWNLOAD

CHAPTER 1
GENERAL CAUTIONS FOR MAINTENANCE WORK
1-1 Correct Work
1-2 Safety Precautions
1-3 Preparations
1-4 Cautions for Disassembiy and Reassembly
1-5 Cautions for Removal and Installation of Hydraulic Equipment
1-6 Cautions for Removal and Installation of Hydraulic Piping
1-7 Cautions for Handling Seals
1-8 Correct installation Of Hydraulic Hose
1-9 Air Release of Hydraulic EqUIpment
CHAPTER 2
TECHNICAL DATA
2-1 SpeCIficatIons
2-2 Outline Drawing and Working Area
2-3 Weight List of Main Parts
2-4 Lifting Capacity List With orWithoutBucket
CHAPTER 3
SERVICE STANDARDS
3-1 Machine Performance
3-2 Engine
3-3 Undercarriage
3-3-1 Rubber Crawler Specifications
3-4 Controls
3-5 Hydraulic EqUIpment
3-5-1 Hydraulic Cylinders
3-6 Implement
3-6-1 Front Attachments
3-6-2 Variable Track Gauge Type and Blade Moving Device
3-6-3 Bucket Teeth

3-7 List of Tightening Torque
3-7-1 MachIne
3-7-2 Engine
3-7-3 Tightening Torque for General Bolts and Nuts (Machine)
3-7-4 Hydraulic Hose Joint

CHAPTER 4

ENGINE

4-1 Disassembly of EngIne
4—1-1 Removing the Nozzle and Glow Plug
4—1-2 Removing the Cylinder Head Cover
4-1-3 Removing the Oil PIpe
4-1-4 Removing the Water Pump Assembly
4-1-5 Removing the Rocker Arm and Push Rods
4-1-6 Removing the Exhaust ManIfoId
4-1-7 Removing the Cylinder Head
4-1-8 Removing the Tappets
4-1-9 Removing the Injection Pump Assembly
4-1-10 Removing the Crankshaft Pulley
4-1-11 Removing the Timing Gear Case Assembly
4-1-12 Removing the Idle Gear and Oil Pump Assembly
4-1-13 Removing the Camshaft Assembly
4-1-14 Removing the Suction Filter and Pipe
4-1-15 Removing the Connecting Rods and Pistons
4-1-16 Removing the Crankshaft Assembly
4-2 Disassembiy, Inspection and Reassembiy of Main Component Parts-
4-2-1 Cylinder Head
4-2-2 Rocker Amt
4-2-3 Cylinder Block
4-2—4 Piston and Piston Rings
4-2-5 Connecting Rod
4-2-6 Connecting Rod Metal
4-2-7 Bearing Holder
4-2-8 Crankshaft Beanng
4-2-9 Crankshaft
4-2-10 Timing Gears and Camshaft Assembly
4-2-11 Lubrication Oil Pump
4-2-12 Thermostat
4-2-13 Nozzle and Holder Assembly
4-2-14 Flywheel and Ring Gear
4-3 Reassembiy of Engine
4-3-1 Crankshaft and Bearing Holder Assembly
4-3-2 Oil Seal and Flywheel Cover (Rear Plate)
4-3-3 Flywheel
4-3—4 Pistons and Connecting Rods
4-2-5 Connecting Rod
4-2-6 Connecting Rod Metal
4-2—7 Bearing Holder
4-2-8 Crankshaft Bearing
4-2-9 Crankshaft
4-2-10 Timing Gears and Camshaft Assembly
4-2-11 Lubrication Oil Pump
4-2-12 Thermostat
4-2-13 Nozzle and Holder Assembly
4-2—14 Flywheel and Ring Gear
4-3 Reassembiy of Engine
4-3-1 Crankshaft and Bearing Holder Assembly
4-3-2 Oil Seal and Flywheel Cover (Rear P|ate)
4-3-3 Flywheel
4-3-4 Pistons and Connecting Rods
4-3-5 Suction Pipe and Suction Filter
4-3-6 Oil Pan and Front Plate
4-3-7 Camshaft Assembly and Plate
4-3-8 Idle Gear and Oil Pump Assembly
4-3-9 Timing Gear Case
4-3—10 Crankshaft Pulley
4-3-11 Injection Pump Assembly
4-3-12 Oil filter and Oil Pipe
4-3-13 Tappets
4-3-14 Cylinder Head Assembly and Cylinder Head Gasket.-
4-3-15 Caps, Push Rods and Rocker Amt Assembly
4-3-16 Adjusting the valve Clearance
4-3-17 Cylinder Head Cover
4-3-18 Water Pump Assembly
4-3-19 Oil Pressure Switch
4-3-20 Nozzle and Holder Assembly
4-3-21 Return Pipes and Injection Pipes
4-3-22 V-beit
4-4 Electrical Equipment
4-4-1 Starter Motor
4-4-2 Alternator
4-4-3 Glow Plug
4-5 Troubleshooting
4-6 Electric Control System
4—6—1 Parts Name and POSItIon
4—6-2 Electric Unit
4—6—3 Troubleshooting
4-6-4 Service
CHAPTER 5
HYDRAULIC SYSTEM
5-1 Outline
5-1-1 Control Valve Operation
5-2 Hydraulic Circuit Schematic
5-3 Circuit Operation
5-3-1 Boom
5-3-3 Bucket
5-3-5 Boom Swing
5-3-6 Blade
5-3-7 Travel
5-3-8 Simultaneous Operation of Travel and Biade………..
5-3-9 Hydraulic P.T.O.
5-3-10 Simultaneous Operation of Boom Up and Bucket.
5-3-11 Track Gauge Change
5-4 Pressure Adjustment
5-4-1 Relief Valves
5-4-2 Swing Combination Valve (Brake Valve)…

CHAPTER 6

HYDRAULIC EQUIPMENT

6-1 Hydraulic Pump

6-2 Control Valve

6-3 Swing motor

6-4 Valve Block

6-5 Travel Motor
CHAPTER?—
ADJUSTMENT AND REPAIR
7-1 Electrical Equipment of Machine
7—1-1 Parts Layout of Electrical Equipment
7—1-2 Monitor and Alarm Systems
7—1-3 Wiring DIagram
7—1-4 Circuit Description of Engine Start and Stop
7—1—5 Circuit Description of Battery Charging
7-1-6 Removal and Reinstallation of Engine
7-1-7 Removal and Reinstallation of Starter motor
7-1-8 Removal and Reinstallation of Engine ECU
7-2 Undercarriage
7-2—1 Outline
7-2—2 Points of Reassembiy
7-2—3 Disassembly and Reassembiy of Idler
7-2—4 Disassembly and Reassembiy of Track Roller
7-3 Controls
7-3-1 Control Train
7-3-2 Removal and Reinstallation of Control Levers
7-3-3 Adjustment of Control Levers
7-3-4 Adjustment of Travel Levers
7-3—5 Adjustment of P.T.O. Pedal
7-3-6 Adjustment of Boom Swing Pedal
7-3-7 Adjustment of Blade Lever
7-3-8 Adjustment of Accelerator Lever (Adjustment of Engine Idling Speed).
7-4 Swing Bearing
7-4-1 Removal and Reinstallation of Swing Bearing
7-5 Hydraulic EqUIpment
7-5-1 Removal and Reinstallation of Hydraulic Pump
7—5—2 Removal and Reinstallation of Control Valve
7-5-3 Removal and Reinstallation of Swing Motor
7-5-4 Removal and Reinstallation of Swivel JOInt
7-5-5 Disassembly and Reassembiy of Swivel Joint
7-5-6 Disassembly and Reassembiy of Hydraulic Cylinders
7-5-7 Removal and Reinstallation of Hydraulic Oil Tank
7-5-8 Removal and Reinstallation of Track Gauge Change Cylinder…
7-5-9 Piping Layout

7-6 ROPS Bar
7-6-1 Removal and Reinstallation of ROPS bar

7-7 Work Implements
7-7-1 Removal and Reinstallation of Work Implements

CHAPTER 8

PERIODIC INSPECTION AND SERVICING

8-1 List of Periodic Inspection and SerVICIng
CHAPTER 9

FUEL, LUBE OIL AND GREASE RECOMMENDED

9. Fuel, Lube Oil and Grease Recommended

CHAPTER 10

TROUBLESHOOTING

10-1 Non-Breakdowns
10-1-1 Natural Release of Bucket
10-1-2 Discontinuous Arm Movement
10-1-3 Drifting of Upperstmcture on Quick Travel Operation
10-1-4 Thermal Shock of Travel Motor
10-1-5 Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change.

10-2 Troubleshooting
10-2-1 Machine and Engine
10-2-2 Electrical Equipment on Panel

CHAPTER 11

REFERENCE DATA

11-1 Dimensions and Specifications for Attachment