Gehl 283Z Compact Excavator Service Manual 918255 – PDF DOWNLOAD

Gehl 283Z Compact Excavator Service Manual 918255 – PDF DOWNLOAD

FILE DETAILS:

Gehl 283Z Compact Excavator Service Manual 918255 – PDF DOWNLOAD

Language : English
Pages : 154
Downloadable : Yes
File Type : PDF
Size: 9.4 MB

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Gehl 283Z Compact Excavator Service Manual 918255 – PDF DOWNLOAD

Introduction:General Information:

• Your decision to purchase the Gehl compact excavator was a good one. We are sure that
  your decision was carefully considered and that you are looking forward to many years of
  reliable performance from the machine.
• Gehl Company has invested much time and effort in developing its lines of equipment. The
  machine you have purchased is built with a great deal of pride, and designed to provide
  long life, efficient operation, durability and dependability.
• Modern machinery has become more sophisticated and, with that in mind, Gehl Company
  asks that you read and COMPLETELY understand the contents of this manual and
  become familiar with the new machine, BEFORE attempting to service it.
• This manual was developed specifically for the machine you have purchased. The information
  within is for your assistance in preparing, adjusting, maintaining and servicing the
  machine. More importantly, this manual provides a service plan for safe and proper servicing
  of the machine. Refer to the Table of Contents for an outline (by chapters) of this manual.
• Use the Index, located at the back of this manual, for specific chapter and topic/page
  number references.
• If the machine was purchased “used,” or if the owner’s address has changed, please provide
  your Gehl dealer or Gehl Company with the owner’s name and current address, along
  with the machine model and serial number. This will allow the registered owner information
  to be updated, so that the owner can be notified directly in case of an important product
  issue, such as a safety update program.
  “Right” and “left” are determined from the position of sitting in the operator’s seat, facing
  forward.
• Gehl Company reserves the right to make changes or improvements in the design or construction
  of any part without incurring the obligation to install such changes on any unit
  previously delivered.
• Throughout this manual information is provided that is introduced by the word NOTE or
  IMPORTANT. Be sure to read carefully and comply with the message or directive given.
  Following this information will improve your maintenance efficiency, help you to avoid
  costly breakdowns or unnecessary damage and extend the machine’s life.
• Operational safety and readiness of the machine depends partially on maintenance and
  service. This is why regular maintenance and service work is absolutely necessary. Extensive
  maintenance and repair work must always be carried out by a qualified technician with
  appropriate training. Insist on using Gehl original service parts when carrying out maintenance
  and repair work. This ensures operational safety and readiness of the machine, and
  maintains its value.
• Our wide dealership network stands ready to provide any assistance required, including
  genuine Gehl service parts. All parts should be obtained from or ordered through your
  Gehl dealer. Give complete information about the part as well as the model number and
  serial number of your machine. Record numbers, in the spaces provided, as a handy
  record for quick reference.

TABLE OF CONTENTS:

Gehl 283Z Compact Excavator Service Manual 918255 – PDF DOWNLOAD

1 Introduction……………………………………………………… 10
1.1 General Information………………………………………….. 10
1.2 Serial number locations, type decals and component numbers……….. 11
1.3 Designated uses and exemption from liability……………………. 13
1.4 Abbreviations/symbols………………………………………… 13
1.5 Identification of warnings and dangers…………………………. 14
1.6 Machine overview…………………………………………….. 15
1.7 Cab overview………………………………………………… 16
1.8 Cab legend………………………………………………….. 17
1.9 Instrument panel overview…………………………………….. 18
1.10 Instrument panel legend……………………………………… 19
1.11 Engine compartment overview………………………………….. 20
1.12 Chassis overview……………………………………………. 21
1.13 Valve compartment…………………………………………… 22
1.14 Overview of open engine and valve compartment………………….. 23
2 Specifications……………………………………………………. 24
2.1 Chassis…………………………………………………….. 24
2.2 Engine……………………………………………………… 24
Fuel injection pump………………………………………….. 25
Engine capacities……………………………………………. 25
Engine tightening torques…………………………………….. 25
2.3 Hydraulic system…………………………………………….. 25
Work hydraulics……………………………………………… 25
Auxiliary hydraulics oil flow…………………………………. 26
2.4 Undercarriage and swivel unit…………………………………. 26
2.5 Dozer blade…………………………………………………. 26
2.6 Electric system……………………………………………… 26
Fuse box……………………………………………………. 27
2.7 Noise levels………………………………………………… 28
2.8 Vibration…………………………………………………… 28
2.9 Coolant compound table……………………………………….. 28
2.10 Model-specific tightening torques…………………………….. 29
2.11 General tightening torques…………………………………… 29
Tightening torques for hydraulic screw connections (dry assembly)…. 29
Tightening torques for high-resistance screw connections…………. 31
2.12 Dimensions…………………………………………………. 32
2.13 Lift capacity table…………………………………………. 33
2.14 Lift capacity table with optional counterweight………………… 34
2.15 Bucket geometry…………………………………………….. 35
3 Maintenance………………………………………………………. 36
3.1 Fluids and lubricants………………………………………… 36
Additional oil change and filter replacement (hydraulics)………… 37
3.2 Maintenance label……………………………………………. 38
Explanation of symbols on the maintenance label…………………. 38
3.3 Maintenance schedule…………………………………………. 40
Check, clean or inspect………………………………………. 40
Fluid and filter changes……………………………………… 41
Functional check…………………………………………….. 41
Leakage check……………………………………………….. 41
Daily lubrication……………………………………………. 42
3.4 Service package……………………………………………… 43
3.5 Introduction………………………………………………… 43
3.6 Fuel system…………………………………………………. 44
Specific safety instructions………………………………….. 44
Refueling…………………………………………………… 44
Stationary fuel pumps………………………………………… 45
Bleeding the fuel system……………………………………… 45
Emptying the fuel tank……………………………………….. 46
Diesel fuel specification…………………………………….. 46
Fuel shut-off valve and water separator………………………… 46
Replacing the fuel filter…………………………………….. 47
3.7 Engine lubrication system…………………………………….. 48
Checking the oil level……………………………………….. 48
Adding engine oil……………………………………………. 49
Changing engine oil and filter………………………………… 50
3.8 Cooling system………………………………………………. 51
Specific safety instructions………………………………….. 51
Checking/adding coolant………………………………………. 52
Draining coolant…………………………………………….. 53
3.9 Air filter………………………………………………….. 54
Replacing the filter…………………………………………. 55
Functional check of the dust valve once a week………………….. 56
3.10 V-belt…………………………………………………….. 57
Checking V-belt tension………………………………………. 57
Tightening the V-belt………………………………………… 58
3.11 Pressure checks…………………………………………….. 59
General…………………………………………………….. 59
Pilot control pressure check………………………………….. 59
Variable-displacement pump P1 pressure check……………………. 60
Variable-displacement pump P2 pressure check……………………. 61
Gear pump P3 pressure check…………………………………… 62
Gear motor secondary pressure limiting valve pressure check………. 63
Test ports overview………………………………………….. 63
Primary pressure limiting valves………………………………. 64
3.4 Test report…………………………………………………. 66
3.5 Hydraulic system…………………………………………….. 68
Specific safety instructions………………………………….. 68
Checking the hydraulic oil level………………………………. 69
Adding hydraulic oil…………………………………………. 70
Changing hydraulic oil……………………………………….. 70
Monitoring the hydraulic oil return filter……………………… 71
Checking hydraulic pressure lines……………………………… 72
3.6 Travel drive………………………………………………… 73
Checking the oil level and adding oil………………………….. 73
Draining oil………………………………………………… 73
3.7 Tracks……………………………………………………… 74
Checking track tension……………………………………….. 74
Track tension……………………………………………….. 74
3.8 Lubrication…………………………………………………. 76
Dozer blade…………………………………………………. 76
Lubrication points on the swivel console……………………….. 76
Boom lubrication points………………………………………. 77
Lubrication points on the dipper arm…………………………… 77
Lubrication strip……………………………………………. 78
Maintenance of attachments……………………………………. 78
3.9 Electrical system……………………………………………. 79
Specific safety instructions………………………………….. 79
Regular service/maintenance…………………………………… 80
Specific component instructions……………………………….. 80
Alternator………………………………………………….. 80
Battery…………………………………………………….. 81
Jump-starting the engine……………………………………… 82
3.10 Cab……………………………………………………….. 83
Replacing the cab filter……………………………………… 83
3.11 General maintenance…………………………………………. 84
Cleaning……………………………………………………. 84
General instructions for all areas…………………………….. 84
Inside the cab………………………………………………. 85
Seat belt…………………………………………………… 85
Exterior of the machine………………………………………. 85
Engine compartment…………………………………………… 85
Screw connections and attachments……………………………… 85
Pivots and hinges……………………………………………. 85
4 Engine…………………………………………………………… 86
4.1 3TNV76-NNS engine overview……………………………………. 86
4.2 Fuel system…………………………………………………. 88
4.3 Checking and adjusting valve tip clearance……………………… 89
4.4 Tightening order for cylinder head bolts……………………….. 89
4.5 Checking the injection nozzles………………………………… 90
Pressure check………………………………………………. 90
4.6 Checking the nozzle jet………………………………………. 90
4.7 Injection time………………………………………………. 91
Checking and adjusting injection time………………………….. 91
Fuel injection pump replacement……………………………….. 92
4.8 Adjusting engine rpm…………………………………………. 93
4.9 Compression…………………………………………………. 93
4.10 Checking the coolant thermostat………………………………. 93
4.11 Checking the thermal switch………………………………….. 94
4.12 Oil pressure switch…………………………………………. 94
4.13 Checking the coolant circuit…………………………………. 95
4.14 Engine troubleshooting………………………………………. 95
5 Hydraulic system………………………………………………….. 98
5.1 Hydraulic pump PVD-0B-23BP-8G3-5083A…………………………… 98
Pump unit: exploded view………………………………………100
Pilot oil supply unit…………………………………………101
5.2 Main valve block……………………………………………..102
Ports……………………………………………………….102
Legend………………………………………………………103
Main valve block diagram………………………………………104
Pressure limiting valves………………………………………105
Pump assignment………………………………………………106
5.3 Drive counterbalancing system………………………………….107
Pump assignment for drive counterbalancing………………………107
5.4 Regeneration – dipper arm section………………………………108
5.5 Bucket pre-tension……………………………………………108
5.6 Flow rate adjustment of auxiliary hydraulics…………………….109
5.7 Pilot valves…………………………………………………110
Joystick…………………………………………………….110
Pilot valve (driving)…………………………………………111
Pilot valve for auxiliary hydraulics……………………………113
5.8 Changeover valve for SAE/ISO controls (option)…………………..114
5.9 Proportional valve (option)……………………………………114
5.10 Travel drive………………………………………………..115
Function…………………………………………………….116
5.11 Swivel unit…………………………………………………118
Swivel unit brake…………………………………………….119
5.12 Swivel joint………………………………………………..122
Sealing……………………………………………………..122
5.13 Breather filter……………………………………………..123
5.14 Troubleshooting the hydraulic system…………………………..124
5.15 Hydraulics diagram: legend……………………………………125
5.16 Hydraulics diagram………………………………………….. 0
5.17 Hydraulics diagram for options……………………………….. 0
5.18 Main valve block diagram…………………………………….. 0
6 Electric system……………………………………………………130
6.1 Ohm’s Law (current, voltage, resistance); power………………….130
6.2 Measuring equipment, measuring methods………………………….130
6.3 Cable color coding……………………………………………132
6.4 Relays………………………………………………………132
Use, mode of function…………………………………………132
6.5 Socket………………………………………………………132
6.6 Electric units……………………………………………….133
6.7 Fuse box…………………………………………………….133
6.8 Switches: overview……………………………………………134
Instrument panel legend……………………………………….134
6.9 Alternator…………………………………………………..135
6.10 Starter…………………………………………………….135
6.11 Wiring diagram legend……………………………………….. 0
6.12 Wiring diagram……………………………………………… 0
6.13 Engine wiring harness legend…………………………………. 0
6.14 Engine wiring harness diagram………………………………… 0
6.15 Cab wiring harness………………………………………….. 0
6.16 Proportional controls (option)……………………………….. 0
7 Options…………………………………………………………..142
7.1 Counterweight………………………………………………..142
Specifications……………………………………………….142
7.2 Connecting auxiliary hydraulics………………………………..142
Attachments………………………………………………….143
7.3 Auxiliary hydraulics connections……………………………….143
7.4 Proportional controls…………………………………………144
Function…………………………………………………….144
Ports……………………………………………………….145
Measures to be taken in case of malfunctions…………………….145
Joystick…………………………………………………….145
Boom swivel controls………………………………………….146
Auxiliary hydraulics………………………………………….146
Hammer operation……………………………………………..146
Adjusting control response…………………………………….147
Characteristic curves – status display………………………….147
Wiring harness……………………………………………….148
Control valve plug assignment………………………………….149
Safety features………………………………………………150
Measures to be taken in case of malfunctions…………………….150
Diagnostic display……………………………………………150