14 - 1
Hydrostatic Transmission
Before carrying out any problem solving or any tests on the machine, make sure that the hydraulic system is filled to the correct
level with the correct grade of hydraulic oil (see Section 3) and that the system is at the correct working temperature.
PROBLEM
CAUSE (servo machines)
CAUSE (manual machines)
No drive in any direction
1, 2, 4, 5, 11, 17, 24, 25
1, 2, 4, 5, 17, 24, 25
No drive in either forward or reverse
6, 10, 12, 19
6, 10, 19
No spin turn either left or right
3, 4, 5, 12, 17, 19, 22, 23
3, 4, 5, 17, 19, 22, 23
No drive on one side
5, 6, 10, 12, 19, 23, 24
5, 6, 8, 10, 19, 23, 24
Machine will not travel in straight line
3, 7, 10, 12, 17, 19, 20, 21, 22
3, 8, 9, 17, 19, 21, 25
No brakes
14, 15, 16, 18
14, 15, 16, 18
Brakes on all the time
13, 14, 15, 16, 18
13, 14, 15, 16, 18
No tractive effort
4, 5, 6
4, 5, 6
Machine creeps in neutral
7
8
KEY TO CAUSE
REMEDY
PAGE REF.
1
No oil in hydrostatic system
Check supply of oil to pump.
2
Door/restraint not in correct position
Ensure door closed and restraint in operating position,
check electrical wiring and switches as required.
Sect. C
3
Tyres worn or pressure incorrect
Check tyre pressures and condition.
3/9-4
4
Charge pressure incorrect
Adjust charge pressure.
E10-3, E10-11
5
No or low pump output
Check pump - carry out wheel speed check.
E14-4
If one pump suspect, swop motor feed hoses and notice
if problem changes sides - if ‘yes’, pump related fault;
if ‘no’, motor related fault.
E14-3
6
A high pressure ‘loop’ relief valve/tow valve
Replace relief valve and re-check.
open/set incorrectly
7
Pump neutral position set incorrectly
Adjust servo neutral position.
E10-11, E14-5, E14-6
8
Manual controls incorrectly set
Adjust manual controls
E10-7
9
Lever stops incorrectly set
Adjust lever stops.
E14-7
10
Feed hose failure
Check motor feed hoses.
11
No hydraulic feed to joystick
Check for feed to joystick.
E14-11
12
No hydraulic feed from joystick to pump
Check for feed from joystick to pump.
E14-11
13
Brake hose failure
Inspect brake hoses.
14
Brake release pressure incorrect
Check charge/brake pressure.
E14-10
15
Electrical failure (brake valve circuit)
Check brake valve electrical circuit.
Sect. C
16
Brake valve inoperative
Check valve (sticking spool, etc.)
E18-3
17
Brakes not released
Inspect motor brakes for seal damage. Repair as required.
E13-3, E13-5
Section E
Hydraulics
9803/8500
Section E
14 - 1
Issue 1
Problem Solving
Summary of Contents for ROBOT 150
Page 2: ......
Page 21: ...5 2 Safety Decals cont d Section 2 Care and Safety 9803 8500 Section 2 5 2 Issue 2...
Page 77: ...Attachments Section A Section A 7 7 9803 8500 Issue 1 Backhoe...
Page 97: ...4 3 Section C Electrics 9803 8500 Section C 4 3 Issue 1 Alternator S213570...
Page 123: ...1 1 Section D Controls 9803 8500 Section D 1 1 Issue 1 Safety Restraint Bar S168160 1...
Page 125: ...2 1 Section D Controls 9803 8500 Section D 2 1 Issue 1 Throttle Controls S168150D...
Page 142: ...Hydraulics 9803 8500 Issue 1 4 1 4 1 Descriptions Section E Section E...
Page 145: ...Hydraulics 9803 8500 Issue 2 5 2 5 2 Descriptions Section E Section E...
Page 146: ...Hydraulics 9803 8500 Issue 2 5 3 5 3 Descriptions Section E Section E...
Page 149: ...Hydraulics 9803 8500 Issue 2 5 6 5 6 Descriptions Section E Section E...
Page 152: ...Hydraulics 9803 8500 Issue 1 5 9 5 9 Descriptions Section E Section E...
Page 163: ...10 1 Section E Hydraulics 9803 8500 Section E 10 1 Issue 1 Pumps 168150...
Page 165: ...10 3 Section E Hydraulics 9803 8500 Section E 10 3 Issue 1 Pumps 168030...
Page 167: ...10 5 Section E Hydraulics 9803 8500 Section E 10 5 Issue 1 Pumps 168160...
Page 175: ...11 1 Section E Hydraulics 9803 8500 Section E 11 1 Issue 2 Pumps 167750...
Page 179: ...13 1 Section E Hydraulics 9803 8500 Section E 13 1 Issue 1 Drive Motors 167720 S167720A...
Page 183: ...13 5 Section E Hydraulics 9803 8500 Section E 13 5 Issue 1 Drive Motors S243720 X X S243870...
Page 212: ...18 1 Section E Hydraulics 9803 8500 Section E 18 1 Issue 2 Valves S204980 X X 3 B A 4 2 1 5...
Page 215: ...20 1 Section E Hydraulics 9803 8500 Section E 20 1 Issue 1 Servo Joysticks S167960...
Page 217: ...20 3 Section E Hydraulics 9803 8500 Section E 20 3 Issue 1 Servo Joysticks 167950...
Page 221: ...23 3 Section E Hydraulics 9803 8500 Section E 23 3 Issue 1 Rams S167800...
Page 241: ...1 2 Section F Transmission 9803 8500 Section F 1 2 Issue 2 Tyres and Wheels 167861 167811...
Page 243: ...1 4 Section F Transmission 9803 8500 Section F 1 4 Issue 2 Tyres and Wheels 167851...
Page 253: ...2 1 Section K Engine 9803 8500 Section K 2 1 Issue 1 Removal and Replacement S167990...