Gehl Z17 170Z Compact Excavator Service Manual 50940107 – PDF DOWNLOAD

Gehl Z17 170Z Compact Excavator Service Manual 50940107 – PDF DOWNLOAD

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Gehl Z17 170Z Compact Excavator Service Manual 50940107 – PDF DOWNLOAD

Language : English
Pages : 400
Downloadable : Yes
File Type : PDF
Size: 31.7 MB

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Gehl Z17 170Z Compact Excavator Service Manual 50940107 – PDF DOWNLOAD

1. General Cautions for Maintenance Work:
1-1 Correct Work:
Correct work means the quickest possible completion of according to the correct procedures and the specified standards.
It is important when conducting certain operations always to bear in mind the equipment, tools, gauges, materials, oil
and grease, etc. that you must have ready, as well as items to be checked, adjusted, or disassembled, and cautions
to watch out for.
1-2 Safety Precautions:
(1) Never attempt servicing while engine is running or immediately after stopping operation.
(2) Wear work cloths, safety shoes and helmet.
(3) Check the equipment and tools before use. Especially, be sure to check the crane, lifting equipment and tools.
(4) When working together with other persons, allocate everyone’s share of job, arrange the signals and act in concert
with the other persons.
(5) The operation of the crane and slinging work must be performed by qualified persons.
(6) Do not enter or pass under the raised load.
(7) Lift and support the massive parts by crane before removing the installation bolts.
(8) Disconnect cables from battery before repairing the electric system.
(9) Remove the battery when welding the machine.
1-3 Preparations:
(1) Check the service record of the machine. (That is, check how many months or hours the machine has been
used since the preceding overhaul, what was the trouble then and what parts were replaced.)
(2) Have all servicing tools ready, i.e., tools, measuring devices (which have received periodic maintenance), containers,
oil & grease, etc.
(3) Have the service literature (operation manual, parts catalog, etc.) ready.

TABLE OF CONTENTS:

Gehl Z17 170Z Compact Excavator Service Manual 50940107 – PDF DOWNLOAD

1 Operation………………………………………………………………. 7
1.1 Important Information about this Service Manual……………………….. 7
1.2 Abbreviations/Symbols………………………………………………. 7
1.3 Identification of Warnings and Hazards……………………………….. 8
1.4 Designated Use and Exemption from Liability…………………………… 8
1.5 Type Decals and Component Numbers……………………………………. 9
Serial Number Location…………………………………………………. 9
Engine Number…………………………………………………………. 9
Hydraulic Pump Identification Number…………………………………….. 10
Main Valve Block Identification Number…………………………………… 10
Travel Drive Identification Number………………………………………. 10
Swivel Unit Identification Number……………………………………….. 10
1.6 Machine Overview…………………………………………………… 11
1.7 Cab Overview………………………………………………………. 12
1.8 Cab Legend………………………………………………………… 13
1.9 Instrument Panel Overview…………………………………………… 14
1.10 Instrument Panel Legend……………………………………………. 15
1.11 Engine Compartment Overview………………………………………… 16
1.12 Chassis Overview………………………………………………….. 17
1.13 Tilting the Cab…………………………………………………… 18
Tilting the Cab Down…………………………………………………… 19
1.14 SAE Operating Controls (Standard)…………………………………… 20
1.15 ISO Operating Controls (Selectable)…………………………………. 21
1.16 Boom Slew/Auxiliary Hydraulics Pedal………………………………… 22
1.17 Dozer Blade………………………………………………………. 22
1.18 Throttle Lever……………………………………………………. 23
1.19 Operator’s Seat Adjustments………………………………………… 24
1.20 Ventilation………………………………………………………. 26
Windshield……………………………………………………………. 26
1.21 Cab Door Latch Release…………………………………………….. 27
1.22 Interior Light……………………………………………………. 27
1.23 Tool Kit and Cab Jack Handle……………………………………….. 27
1.24 Cab Heat Control………………………………………………….. 28
1.25 Recirculated Air Mode……………………………………………… 28
1.26 Hydraulics/Swiveling and Boom Rotation Pedal Adjustment……………….. 29
2 Specifications………………………………………………………….. 31
2.1 Chassis…………………………………………………………… 31
2.2 Engine……………………………………………………………. 31
2.3 Hydraulic System…………………………………………………… 33
2.4 Undercarriage and Swivel Unit……………………………………….. 34
2.5 Dozer Blade……………………………………………………….. 34
2.6 Electrical System………………………………………………….. 35
2.7 Sound Levels………………………………………………………. 37
2.8 Coolant Compound Table……………………………………………… 37
2.9 Model-Specific Tightening Torques……………………………………. 37
2.10 General Specifications…………………………………………….. 38
2.11 Extended Dipper Arm Lift Capacities…………………………………. 40
2.12 Lift Capacities with Counterweight………………………………….. 41
2.13 Lift Capacities with Extended Dipper Arm and Counterweight…………….. 42
2.14 Bucket Geometry…………………………………………………… 43
3 Maintenance…………………………………………………………….. 45
3.1 General Information Care and Servicing……………………………….. 45
Care and Servicing…………………………………………………….. 45
Maintenance Safety…………………………………………………….. 46
3.2 Fluids and Lubricants………………………………………………. 47
3.3 Maintenance Decal Symbols…………………………………………… 49
3.4 Maintenance Decal………………………………………………….. 50
3.5 Maintenance Schedule……………………………………………….. 51
3.6 General Maintenance………………………………………………… 54
3.7 Lubrication……………………………………………………….. 56
3.8 Fuel System……………………………………………………….. 57
Fuel Filter…………………………………………………………… 58
Fuel Shut-Off Valve, Fuel Prefilter and Water Separator……………………. 58
Purging Air from the Fuel System………………………………………… 59
3.9 Engine Lubrication System…………………………………………… 60
3.10 Changing Engine Oil and Filter……………………………………… 60
3.11 Coolant System……………………………………………………. 62
Checking Coolant Level…………………………………………………. 62
3.12 Air Cleaner Service……………………………………………….. 63
Dust Valve Functional Check…………………………………………….. 64
3.13 Checking and Adjusting V-Belt Tension……………………………….. 65
Checking and Adjusting Air Conditioning V-Belt Tension…………………….. 66
3.14 Pressure Check……………………………………………………. 67
3.15 Test Report………………………………………………………. 73
3.16 Hydraulic System………………………………………………….. 76
Checking Hydraulic Oil Level……………………………………………. 76
Changing Hyraulic Oil………………………………………………….. 78
Hydraulic Cooling System……………………………………………….. 78
Adding Hydraulic Oil…………………………………………………… 79
Specific Safety Instructions……………………………………………. 80
3.17 Track System……………………………………………………… 81
Changing Final Drive Oil……………………………………………….. 81
3.18 Electrical System…………………………………………………. 84
Using a Booster Battery (Jump-Starting)………………………………….. 85
3.19 Cab Heater Filter…………………………………………………. 87
4 Engine…………………………………………………………………. 89
4.1 Engine Overview……………………………………………………. 89
4.2 Fuel System……………………………………………………….. 91
4.3 Removing the Cylinder Head Cover…………………………………….. 92
4.4 Checking and Adjusting Valve Tip Clearance……………………………. 92
4.5 Cylinder Head Bolt Tightening Order………………………………….. 94
4.6 Checking the Injection Nozzles………………………………………. 94
4.7 Checking the Nozzle Jet…………………………………………….. 95
4.8 Injection Timing…………………………………………………… 96
4.9 Adjusting Engine RPM……………………………………………….. 97
4.10 Checking Compression………………………………………………. 97
4.11 Checking the Coolant Thermostat…………………………………….. 98
4.12 Checking the Thermal Switch………………………………………… 98
4.13 Oil Pressure Switch……………………………………………….. 99
4.14 Checking the Coolant Circuit……………………………………….. 99
4.15 Engine Troubleshooting……………………………………………..100
5 Hydraulic System…………………………………………………………103
5.1 Hydraulic Pump……………………………………………………..103
5.2 Main Valve Block……………………………………………………108
5.3 Drive Counterbalancing System………………………………………..113
5.4 Regeneration – Dipper Arm Section…………………………………….115
5.5 Bucket Pre-Tension………………………………………………….115
5.6 Boom Raise…………………………………………………………116
5.7 Check Valve (Load Retaining Valve)……………………………………117
Raising the Boom……………………………………………………….117
Lowering the Boom………………………………………………………117
5.8 Dipper Arm Cylinder, Extend………………………………………….118
5.9 Secondary Pressure Limiting Valves for the Auxiliary Hydraulics (Option)….119
5.10 Pilot Valves………………………………………………………120
5.11 Valves……………………………………………………………125
5.12 Travel Drive………………………………………………………130
5.13 Travel Drive………………………………………………………132
5.14 Swivel Unit……………………………………………………….136
5.15 Swivel Joint………………………………………………………141
5.16 Breather Filter……………………………………………………142
5.17 Troubleshooting the Hydraulic System…………………………………143
5.18 Main Valve Block Diagram……………………………………………145
5.19 Hydraulic Diagram)…………………………………………………146
5.20 Hydraulic Diagram………………………………………………….147
5.21 Main Valve Block Diagram with 3rd Control Circuit……………………..148
6 Electrical System………………………………………………………..149
6.1 Ohm’s Law (Current, Voltage, Resistance); Power………………………..149
6.2 Measuring Equipment, Measuring Methods………………………………..149
6.3 Cable Color Coding………………………………………………….150
6.4 Relays…………………………………………………………….151
6.5 Electric Units……………………………………………………..151
6.6 Fuse Box in Instrument Panel…………………………………………151
6.7 Main Fuse Box with Relays……………………………………………152
6.8 Relays…………………………………………………………….152
6.9 Lubrication Block Accessory Power Socket………………………………153
6.10 Joystick Tip Switches………………………………………………153
6.11 Instrument Panel Overview…………………………………………..154
6.12 Switch Overview……………………………………………………155
6.13 Alternator………………………………………………………..156
6.14 Starter…………………………………………………………..156
6.15 Boom Working Light Wiring Harness……………………………………157
6.16 Wiring Diagram Legend………………………………………………158
6.17 Wiring Diagram…………………………………………………….159
6.18 Engine – Chassis Wiring Harness……………………………………..160
6.19 Engine – Chassis Wiring Harness……………………………………..161
6.20 Wiring Harness: Switches……………………………………………162
6.21 Wiring Harness: Switches……………………………………………163
6.22 Cab Roof Wiring Harness…………………………………………….164
6.23 Armrest Wiring Harness……………………………………………..165
7 Options…………………………………………………………………167
7.1 Air Conditioning……………………………………………………167
7.2 Counterweight………………………………………………………175
7.3 Extended Dipper Arm…………………………………………………175
7.4 Control Circuit Hydraulic Coupling Connections…………………………176
7.5 3rd Control Circuit Connections………………………………………176
7.6 Auxiliary Hydraulics Connections……………………………………..177
7.7 Automatic Idling Speed………………………………………………178