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12 - 10
System Diagnosis (cont'd)
Low R-134a Charge
Gauge Readings:
Low Side Gauge -
Low.
High Side Gauge -
Low.
Other symptoms:
Sight Glass -
Bubbles continuously visible.
Diagnosis:
System slightly low on R-134a, due to leak or
incorrect charge.
Correction:
1.
Leak test system.
2.
Evacuate A/C system.
3.
Repair system leaks.
4.
Charge system with R-134a.
5.
Operate system and check performance.
Poor Refrigerant Circulation
Gauge Readings:
Low Side Gauge -
Zero to negative.
High Side Gauge -
Low.
Other symptoms:
Receiver-Drier -
Frost on tubes from receiver-drier
to evaporator unit.
Diagnosis:
Refrigerant flow obstructed by dirt, receiver-drier
clogged.
Correction:
1.
Evacuate A/C system.
2.
Replace receiver-drier.
3.
Charge system with R-134a.
4.
Operate system and check performance.
LOW SIDE (RED)
HIGH SIDE (BLUE)
Low
Low
Section B
Body & Framework
9803/6410
Section B
12 - 10
Issue 1
Air Conditioning
LOW SIDE (RED)
HIGH SIDE (BLUE)
Zero to negative
Low
LOW SIDE - 0.76 bar (0.77 kgf/cm
2
)(11 lbf/in
2
)
HIGH SIDE - 8.3 bar (8.5 kgf/cm
2
)(121 lbf/in
2
)
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
)
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30
0
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0
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A268030
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30
0
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A268040
Summary of Contents for JS130
Page 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Page 118: ......
Page 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Page 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Page 207: ......
Page 209: ......
Page 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Page 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...