Gehl Z17 GEN:2 170Z NXT2 Compact Excavator Service Manual 50940307 – PDF DOWNLOAD

Gehl Z17 GEN:2 170Z NXT2 Compact Excavator Service Manual 50940307 – PDF DOWNLOAD

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Gehl Z17 GEN:2 170Z NXT2 Compact Excavator Service Manual 50940307 – PDF DOWNLOAD

Language : English
Pages : 398
Downloadable : Yes
File Type : PDF
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Gehl Z17 GEN:2 170Z NXT2 Compact Excavator Service Manual 50940307 – PDF DOWNLOAD

1-2 Safety Precautions
(1) Never attempt servicing while engine is running or immediately after stopping operation.
(2) Wear work clothes, 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 GEN:2 170Z NXT2 Compact Excavator Service Manual 50940307 – PDF DOWNLOAD

CHAPTER 1
GENERAL CAUTIONS FOR MAINTENANCE WORK
1-1 Correct Work 1-1
1-2 Safety Precautions 1-1
1-3 Preparations 1-1
1-4 Cautions for Disassembly and Reassembly 1-1
1-5 Cautions for Removal and Installation of Hydraulic Equipment 1-2
1-6 Cautions for Removal and Installation of Hydraulic Piping 1-2
1-7 Cautions for Handling Seals 1-3
1-8 Correct Installation of Hydraulic Hose 1-3
1-9 Specifications of Hydraulic Hose 1-6
1-10 Air Release of Hydraulic Equipment 1-11
CHAPTER 2
TECHNICAL DATA
2-1 Specifications 2-1-1
2-2 Outline Drawing and Working Area 2-2-1
2-3 Weight List of Main Parts 2-3-1
2-4 Lifting Capacity List 2-4-1
CHAPTER 3
SERVICE STANDARDS
3-1 Machine Performance 3-1-1
3-2 Engine 3-2-1
3-3 Undercarriage 3-3-1
3-3-1 Rubber Crawler Specifications 3-3-1
3-4 Controls 3-4-1
3-5 Hydraulic Equipment 3-5-1
3-5-1 Hydraulic Cylinders 3-5-1
3-6 Implement 3-6-1
3-6-1 Front Attachments 3-6-1
3-6-2 Blade Moving Device 3-6-2
3-6-3 Bucket Teeth 3-6-2
3-7 List of Tightening Torque 3-7-1
3-7-1 Machine 3-7-1
3-7-2 Engine 3-7-4
3-7-3 Tightening Torque for General Bolts and Nuts 3-7-4
3-7-4 Hydraulic Hose Joint 3-7-5
CHAPTER 4
ENGINE
4-1 Exploded View 4-1-1
4-2 Measurement, Inspection and Adjustment 4-2-1
4-2-1 Measuring the Compression Pressure 4-2-1
4-2-2 Adjusting the Valve Clearance 4-2-2
4-2-3 Checking the V-belt Tension 4-2-3
4-2-4 Checking the Fuel Injection Valve 4-2-3
4-2-5 Checking and Adjusting the Fuel Injection Timing 4-2-5
4-2-6 Adjusting the Maximum (or Minimum) Idling Speed 4-2-7
4-2-7 Checking the Cooling Water System and Radiator for Water Leakage 4-2-7
4-2-8 Checking the Sensors 4-2-8
4-3 Measurement Procedure, Service Data and Corrective Action 4-3-1
4-3-1 Cylinder Head 4-3-1
4-3-2 Cylinder Block 4-3-6
4-3-3 Valve Rocker Arm 4-3-8
4-3-4 Piston and Piston Rings 4-3-10
4-3-5 Connecting Rod 4-3-13
4-3-6 Cam shaft 4-3-16
4-3-7 Crank shaft 4-3-17
4-3-8 Gears 4-3-20
4-3-9 Trochoid Pump 4-3-21
4-4 Precautions for Reassembly 4-4-1
4-5 Electrical Equipment 4-5-1
4-5-1 Starter Motor 4-5-1
4-5-2 Alternator 4-5-2
CHAPTER 5
HYDRAULIC SYSTEM
5-1 Outline 5-1-1
5-1-1 Control Valve Operation 5-1-4
5-1-2 Additional Operation of Control Valve 5-1-6
5-2 Hydraulic Circuit Schematic 5-2-1
5-2-1 For Standard Type Machines 5-2-1
5-3 Circuit Operation 5-3-1
5-3-1 Boom 5-3-1
5-3-2 Arm 5-3-3
5-3-3 Bucket 5-3-5
5-3-4 Swing 5-3-7
5-3-5 Boom Swing 5-3-9
5-3-6 Blade 5-3-11
5-3-7 Travel 5-3-13
5-3-8 Track Gauge Change 5-3-15
5-3-9 Travel Straight (Simultaneous Operation of Boom, Arm, Bucket, and Boom Swing) 5-3-17
5-3-10 Simultaneous Operation of Boom and Bucket 5-3-19
5-3-11 Hydraulic P T O 5-3-21
5-4 Pressure Adjustment 5-4-1
5-4-1 Relief Valves 5-4-1
5-4-2 Swing Brake Valve 5-4-3
5-4-3 Cut-Off Valve 5-4-4
CHAPTER 6
HYDRAULIC EQUIPMENT
6-1 Hydraulic Pump (Applicable serial number: 09714 and after) 6-1-1
6-2 Control Valve 6-2-1
6-3 Pilot Valve 6-3-1
6-4 Swing Motor 6-4-1
6-5 Travel Motor 6-5-1
CHAPTER 7
ADJUSTMENT AND REPAIR
7-1 Electric Equipment of Machine 7-1-1
7-1-1 Parts Layout of Electrical Equipment 7-1-1
7-1-2 Monitor and Alarm Systems 7-1-2
7-1-3 Wiring Diagram 7-1-5
7-1-4 Circuit Description of Engine Start and Stop, and Battery Charging 7-1-6
7-1-5 Removal and Reinstallation of Engine 7-1-9
7-1-6 Removal and Reinstallation of Starter Motor 7-1-15
7-1-7 Removal and Reinstallation of Fuel Injection Pump 7-1-16
7-1-8 Removal and Reinstallation of Fuel Tank 7-1-18
7-1-9 Removal and Reinstallation of Radiator 7-1-21
7-2 Undercarriage 7-2-1
7-2-1 Outline 7-2-1
7-2-2 Points of Reassembly 7-2-2
7-2-3 Crawler Tension Adjustment Procedure 7-2-3
7-2-4 Removal and Reinstallation of Crawler 7-2-4
7-2-5 Disassembly and Reassembly of Idler 7-2-5
7-2-6 Disassembly and Reassembly of Track Roller 7-2-7
7-2-7 Removal and Reinstallation of Track Gauge Change Cylinder 7-2-9
7-3 Controls 7-3-1
7-3-1 Control Train 7-3-1
7-3-2 Mechanical Control Linkage 7-3-2
7-3-3 Adjustment of Control Levers 7-3-4
7-3-4 Adjustment of Travel Levers 7-3-5
7-3-5 Adjustment of Boom Swing Pedal 7-3-6
7-3-6 Adjustment of Blade Lever 7-3-6
7-3-7 Adjustment of Lock Lever Switch 7-3-7
7-3-8 Adjustment of Accelerator Lever 7-3-8
7-3-9 Adjustment of P T O Pedal 7-3-9
7-3-10 Adjustment Procedure of Travel Alarm Switch (Left and Right) 7-3-10
7-4 Swing Bearing 7-4-1
7-5 Hydraulic Equipment 7-5-1
7-5-1 Removal and Reinstallation of Hydraulic Pump 7-5-1
7-5-2 Removal and Reinstallation of Control Valve 7-5-4
7-5-3 Removal and Reinstallation of Swing Motor 7-5-7
7-5-4 Removal and Reinstallation of Swivel Joint 7-5-10
7-5-5 Disassembly and Reassembly of Swivel Joint 7-5-13
7-5-6 Disassembly and Reassembly of Hydraulic Cylinders 7-5-16
7-5-7 Hydraulic Oil Tank 7-5-20
7-5-8 Piping Layout 7-5-26
7-6 Implement 7-6-1
7-6-1 Removal and Reinstallation of Implement 7-6-1
CHAPTER 8
PERIODIC INSPECTION AND SERVICING
8-1 List of Periodic Inspection and Servicing 8-1
CHAPTER 9
FUEL, LUBE OIL AND GREASE RECOMMENDED
9-1 List of Fuel, Lube Oil and Grease Recommended 9-1
CHAPTER 10
TROUBLESHOOTING
10-1 Non-Breakdowns 10-1-1
10-1-1 Natural Release of Bucket 10-1-1
10-1-2 Discontinuous Arm Movement 10-1-1
10-1-3 Drifting of Upperstructure on Quick Travel Operation 10-1-2
10-1-4 Thermal Shock of Travel Motor 10-1-3
10-1-5 Time Lag on Travel Speed Switching 10-1-4
10-1-6 Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change 10-1-5
10-2 Troubleshooting 10-2-1
10-2-1 Machine and Engine 10-2-1
10-2-2 Electrical Equipment on Panel 10-2-22
CHAPTER 11
REFERENCE DATA
11-1 Specifications for Attachment 11-1