12 - 11
System Diagnosis (cont'd)
No Refrigerant Circulation
Gauge Readings:
Low Side Gauge -
Zero to negative.
High Side Gauge -
Low.
Other symptoms:
Receiver-Drier -
Frost or moisture on tubes before
and after receiver-drier.
Diagnosis:
Refrigerant flow obstructed by dirt, moisture or
gas leakage from expansion valve heat sensing
tube.
Correction:
1.
Evacuate A/C system.
2.
Check heat sensing tube at expansion valve.
Replace expansion valve if necessary.
3.
Remove expansion valve and attempt removal of
dirt. If dirt cannot be removed, replace expansion
valve.
4.
Replace receiver-drier.
5.
Charge system with R-134a.
6.
Operate system and check performance.
Insufficient Cooling of Condenser or Refrigerant
Overcharge
Gauge Readings:
Low Side Gauge -
High.
High Side Gauge -
High.
Other symptoms:
Sight Glass -
No bubbles visible even at lower
engine RPM.
Diagnosis:
Refrigerant overcharge, condenser cooling fins
clogged with dirt or cooling fans malfunctioning.
Correction:
1.
Clean condenser cooling fins.
2.
Check cooling fan operation.
3.
Evacuate A/C system.
4.
Charge system with R-134a.
5.
Operate system and check performance.
LOW SIDE (RED)
HIGH SIDE (BLUE)
Zero to negative
Low
Section B
Body & Framework
9803/6410
Section B
12 - 11
Issue 1
Air Conditioning
LOW SIDE (RED)
HIGH SIDE (BLUE)
High
High
LOW SIDE - -1.0 bar (-1.1 kgf/cm
2
)(-15 lbf/in
2
)
HIGH SIDE - 5.4 bar (5.5 kgf/cm
2
)(78 lbf/in
2
)
LOW SIDE - 3.0 bar (3.0 kgf/cm
2
)(43 lbf/in
2
)
HIGH SIDE - 22.1 bar (22.5 kgf/cm
2
)(320 lbf/in
2
)
50
40
30
30
0
10
20
60
70 80
90
100
110
120
350
150
100
500
0
50
200 250
300
350
400
450
A268050
50
40
30
30
0
10
20
60
70 80
90
100
110
120
350
150
100
500
0
50
200 250
300
350
400
450
A268060
Содержание JS130
Страница 39: ...3 3 Section 3 Routine Maintenance 9803 6410 Section 3 3 3 Issue 1 Greasing continued Excavator End...
Страница 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Страница 118: ......
Страница 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Страница 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Страница 145: ...5 6 Section C Electrics 9803 6410 Section C 5 6 Issue 1 Pump Control Cushioned Boom Starting continued Flow Chart...
Страница 148: ...5 9 Section C Electrics 9803 6410 Section C 5 9 Issue 1 Pump Control Pressure Increasing System continued Flow Chart...
Страница 155: ...5 16 Section C Electrics 9803 6410 Section C 5 16 Issue 1 Pump Control Power Supply Cut Delay Flow Chart...
Страница 159: ...5 20 Section C Electrics 9803 6410 Section C 5 20 Issue 1 Pump Control Swing brake Swing lock continued Flow Chart...
Страница 160: ...5 21 Section C Electrics 9803 6410 Section C 5 21 Issue 1 Pump Control Lever Lock Circuit Diagram Time Chart...
Страница 161: ...5 22 Section C Electrics 9803 6410 Section C 5 22 Issue 1 Pump Control Lever Lock continued Flow Chart...
Страница 207: ......
Страница 209: ......
Страница 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Страница 211: ...Section E Section E Hydraulics 9803 6410 Issue 2 3 5 3 5 Schematics Pilot Control Line Hose Connection Diagram JS03540...
Страница 212: ...Section E Section E Hydraulics 9803 6410 Issue 1 3 6 3 6 Schematics Pilot Control Line Hose Connection Diagram JS03540...
Страница 234: ...14 1 Section E Hydraulics 9803 6410 Section E 14 1 Issue 1 JS00010 Hydraulic Pump Regulator Dismantling and Assembly...
Страница 278: ...32 2 Hydraulic Circuit Diagram Section E Hydraulics 9803 6410 Section E 32 2 Issue 1 Control Valve JS01700...
Страница 279: ...33 1 Neutral Circuit Section E Hydraulics 9803 6410 Section E 33 1 Issue 1 Control Valve JS01610...
Страница 284: ...33 6 Boom Raise BM Operation Section E Hydraulics 9803 6410 Section E 33 6 Issue 1 Control Valve L...
Страница 287: ...33 9 Slew Operation SW Priority Circuit Section E Hydraulics 9803 6410 Section E 33 9 Issue 1 Control Valve JS01770...
Страница 293: ...Hydraulics 9803 6410 Issue 1 34 3 34 3 Section E Section E Control Valve JS01820 Dismantling and Assembly cont d...
Страница 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...