Gehl 803 Service Manual Electrical and Hydraulic Diagram 918169A

Gehl 803 Service Manual Electrical and Hydraulic Diagram 918169A

Size: 20.72 MB
Language: English
Machine: Compact Excavator
Machine Model: 803
Part Number: 918169A
Document: Service Manual Electrical and Hydraulic Diagram
Publication Date: 2005
Pages: 184 Pages

The Bookmarks of Gehl 803 Service Manual Electrical and Hydraulic Diagram 918169A:
1 Operation
1.1 Important information about this service manual
1.2 Abbreviations/symbols
1.3 Identification of warnings and hazards
1.4 Designated use and exemption from liability
1.5 Serial plates and component numbers
Serial number location
Engine number
Hydraulic pump identification number
Main valve block identification number
Travel drive identification number
Swivel unit identification number
1.6 Machine: overview
1.7 Cab overview
1.8 Cab legend
1.9 Instrument panel overview
1.10 Instrument panel legend
1.11 Engine compartment: overview
1.12 Chassis: overview
1.13 Tilting the cab
Tilting the cab up
Tilting the cab down
1.14 SAE operating controls (standard)
1.15 ISO operating controls (selectable)
1.16 Boom slew/auxiliary hydraulics pedal
1.17 Dozer blade
1.18 Throttle lever
1.19 Operator’s seat adjustments
1.20 Ventilation
Windshield
1.21 Cab door latch release
1.22 Interior light
1.23 Tool kit and cab jack handle
1.24 Cab heat control
1.25 Recirculated air mode
1.26 Hydraulics/swiveling and boom rotation pedal adjustment
1.27 Battery master switch
2 Specifications
2.1 Chassis
2.2 Engine
2.3 Hydraulic system
2.4 Undercarriage/swivel unit
2.5 Dozer blade
2.6 Electrical system
2.7 Sound levels
2.8 Coolant compound table
2.9 Specific tightening torques
2.10 General tightening torques
2.11 Dimensions
2.12 Lift capacities
2.13 Lift capacity table (with extended dipper arm and counterweight)
2.14 Geometry
3 Maintenance
3.1 General information care and servicing
Care and servicing
Maintenance safety
3.2 Fluids and lubricants
3.3 Maintenance decal symbols
3.4 Maintenance decal
3.5 Maintenance schedule
3.6 General maintenance
3.7 Lubrication
3.8 Fuel system
Specific safety instructions
Filling the fuel tank
Fuel filter
Fuel shut-off valve, fuel prefilter and water separator
Purging air from the fuel system
3.9 Engine lubrication system
3.10 Changing engine oil and filter
3.11 Coolant system
Checking coolant level
3.12 Air cleaner service
Dust valve functional check
3.13 Checking and adjusting V-belt tension
Checking and adjusting air conditioning V-belt tension
3.14 Pressure check
3.15 Test report
3.16 Hydraulic system
Checking hydraulic oil level
Checking hydraulic pressure lines
3.17 Track system
Changing final drive oil
3.18 Electrical system
Battery
Using a booster battery (jump-starting)
3.19 Cab heater filter
4 Engine
4.1 4TNV98 engine: overview
4.2 Fuel system
4.3 Removing the cylinder head cover
4.4 Checking and adjusting valve tip clearance
4.5 Cylinder head bolt tightening order
4.6 Checking the injection nozzles
4.7 Checking the nozzle jet
4.8 Injection timing
4.9 Adjusting engine RPM
4.10 Checking compression
4.11 Checking the coolant thermostat
4.12 Checking the thermal switch
4.13 Oil pressure switch
4.14 Checking the coolant circuit
4.15 Engine troubleshooting
5 Hydraulic system
5.1 Hydraulic pump
5.2 Main valve block
5.3 Drive counterbalancing system
5.4 Boom summation - raise
5.5 Check valve (load retaining valve)
5.6 Dipper arm cylinder summation
5.7 Dipper arm check valve (load retaining valve)
5.8 Secondary pressure limiting valves for the auxiliary hydraulics (option)
5.9 Pilot valves
5.10 Valves
5.11 Travel drive up to serial no. AC 02793
5.12 Travel drive Auto 2-speed (starting serial no. AC 02957)
5.13 Swivel unit
5.14 Swivel joint
5.15 Breather filter
5.16 Troubleshooting the hydraulic system
5.17 Hydraulic diagram (legend)
5.18 Hydraulic diagram
5.19 Main valve block diagram
6 Electrical system
6.1 Ohm’s law (current, voltage, resistance); power
6.2 Measuring equipment, measuring methods
6.3 Cable color coding
6.4 Relays
6.5 Electrical units
6.6 Fuse box in instrument panel
6.7 Main fuse box with relays
6.8 Relays
6.9 Lubrication strip accessory power socket
6.10 Joystick tip switches
6.11 Instrument panel overview
6.12 Switches: overview
6.13 Alternator
6.14 Starter
6.15 Wiring diagram legend
6.16 Wiring diagram
6.17 Wiring harness legend: engine-chassis
6.18 Wiring harness: engine-chassis
6.19 Wiring harness legend: switches
6.20 Wiring harness: switches
6.21 Wiring harness: cab roof
6.22 Wiring harness: armrest
6.23 Wiring harness: boom working light
7 Options
7.1 Air conditioning
7.2 Counterweight
7.3 Extended dipper arm
7.4 Control circuit hydraulic coupling connections
7.5 3rd control circuit connections
7.6 Auxiliary hydraulics connections
Torque specifications

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