1. XAS185 CD7 Compressors 1.
Scott Ellinger

2. PRODUCT FEATURES

3. Hard Hat Version
Made from polyethylene material that does not dent or rust
Removable side and end panels for easy service
Rear mounted controls and discharge valves

4. The only metal part is the front baffle

5. Standard Version Steel construction
Removable side and end panels for easy service
Same rear mounted control panel

6. XAS 185 CD7 Product nomination and grouping Principle data
Compressor systems:
Compressor running conditions:
Electrical system
Instrument panel
Air system
Oil system
Regulating system
Electrical system
Unload
Load
Blow-down

7. Product Nomination Oil Injected Compressors
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Engine supplier
C : Caterpillar
D : Deutz
J : John Deere
Y : Yanmar
K : Kabota
Working principle
A : Single stage compressor
R : Two stage compressor
Product range
X : Oil injected
portable compressor
Silencing
: Un-silenced
S : Silenced
Prime mover
d : diesel engine
E : electric motor X A S
185 C d
Capacity (FAD)
Liter/sec CFM (US-version)
Working pressure
: standard pressure psi
T : “ten” pressure psi
H : high pressure psi

8. Nomination and grouping
Principle Data
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel

9. Nomination and grouping
Principle Data
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel

10. Nomination and grouping
Compressor Systems
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
4 major systems
Air system
Oil system
Regulating system
Electrical system
This figure shows you the compressor systems and their parts. Basically, a compressors consists of three systems: the air system, the oil system and the regulating system. You can click on one of the three titles to find out more about that particular system.

11. Air system
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

12. Nomination and grouping
Air System
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Air filter
Unloading valve
Compressor element
Check valve
Air receiver
Minimum pressure nozzle
Air outlet valve
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

13. Nomination and grouping
Air Filter
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Air inlet
Centrifugal separation
Dust
Filter element
to compressor element
Vacuum indicator
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

14. Air Filter Filtration of the inlet air in 2 stages :
Centrifugal dust separation
Paper filter element
Optional safety element
Air filter vacuum indicator
Safety Filter XAS Comp
Eng

15. Nomination and grouping
Unloading Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Opens and closes the air inlet to the compressor element.
Open position at load condition => Air consumption
Closed position at no load condition => No air consumption.
Valve is controlled by the regulating pressure.
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

16. Nomination and grouping
Unloading Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Regulating pressure
Air inlet
Spring loaded
Vent Hole
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Integrated
blow-down valve
Valve

17. Nomination and grouping
Unloading Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
LOAD
UNLOAD
Regulating pressure
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Air inlet

18. Nomination and grouping
Compressor Element
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Oil is injected into the air which is compressed to the final discharge pressure.
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

19. Nomination and grouping
Compressor Element
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Oil
Air/Oil
Air inlet
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

20. Nomination and grouping
Check Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Check valve is integrated in the unloader for Series 7 compressors.
Closed when the compressor is stopped.
The air receiver is pressurized, which would result in a reverse air flow.  the check valve prevents this.
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

21. Nomination and grouping
Check Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Valve Part #
LOAD
SHUT-DOWN
Receiver pressure
When compressor is shut-down
Check valve
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

22. Nomination and grouping
Air Receiver
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Air/Oil
Centrifugal Separation
Air outlet
Separator
Element
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

23. Minimum Pressure Nozzle
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
NOZZLE
Guarantees a minimum pressure in the receiver tank (approx. 45 – 60 psi)
Minimum pressure is required to guarantee a continuous oil supply to the element.
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

24. OIL SYSTEM
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

25. Nomination and grouping
Oil System (old style)
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Air receiver
Oil cooler
Oil filter
Compressor element
Oil separator
Scavenge line
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

26. Oil System (new style with TBV)
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Air receiver
Oil cooler
Oil filter/TBV
Compressor element
Oil separator
Scavenge line
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

27. Nomination and grouping
Air Receiver
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Oil flow
Pressure
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

28. Nomination and grouping
Oil Cooler
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Warm Oil
Cooling air
Cool Oil
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Oil Temp Should Have A 40 F (22C) Drop Through The Cooler
* Use Proper Oil and Filters

29. Nomination and grouping
Oil Filter
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Dirty Oil
Filtered Oil
By-pass valve
By pass valve opens at 36psi
Ensures sufficient lubrication and cooling even if the filter gets clogged
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Part #

30. Nomination and grouping
Compressor Element
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Oil
Air/Oil
Lubrication to the bearings
Air inlet
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Scavenged oil

31. Oil Separator & Scavenge Line
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Centrifugal force removes about 85% of the oil
Change of direction, about 99% of the oil
Separator element, less than 3 ppm oil content
Air/Oil
Centrifugal separation
Separator Element
Oil
Scavenge line
When changing the separator element the retainer must be cleaned
Also works as ground
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

32. Oil Separator Separator Element Part Number 2911 0068 00
Classic Reasons For Oil Carryover
Over filled receiver
Plugged scavenge line
Wrong type of oil (no anti foam agent)
Shut down with air outlet valves open
Scavenge tube installed improperly
Separator Element Part Number

33. REGULATING SYSTEM
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

34. Nomination and grouping
Regulating System
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Regulating valve
Unloading valve
Speed regulator
Blow-down valve
Safety valve
Regulating Valve
Unloading Valve
Speed Regulator
Safety Valve
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

35. Nomination and grouping
Regulating Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Regulates the effective pressure in the air receiver
Provides regulating pressure to :
unloading valve => regulates the air inlet according the air requirements
speed regulator => regulates the engine speed to reduce fuel consumption
Regulating Valve Part Number
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

36. Regulating Valve UNLOAD LOAD Adjusts Unload Pressure:
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
UNLOAD
LOAD
Adjusts Unload Pressure:
*with outlet valve closed to 115psi
Control Pressure
Pressure Gauge
To speed reg
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
To unloading valve
To blow down valve
Scavenge line
Receiver Pressure

37. Nomination and grouping
Unloading Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Opens and closes the air inlet to the compressor element.
Open position when running loaded => Air requirements
Closed position at no load condition => No air requirements
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

38. Nomination and grouping
Unloading Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
UNLOAD
LOAD
Regulated pressure
Air Inlet
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Air inlet

39. Unloading Valve – Cut Away

40. Nomination and grouping
Speed Regulator
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Regulates the engine speed in relation to the required air flow
Unit will adjust the engine speed to match air demand
Load condition : maximum engine speed
Unload condition : minimum engine speed (Idle Speed)
Speed Regulator Actuator part number
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

41. Nomination and grouping
Speed Regulator
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Orifice
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
Control air
Speed regulator extends to provide maximum throttle
Retracts under no load to reduce throttle and save fuel

42. Nomination and grouping
Blow Down Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Integrated in the unloading valve
Blows off the air receiver pressure once the compressor has shut-down => this is to depressurize the receiver tank
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

43. Nomination and grouping
Blow Down Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
LOAD / UNLOAD
BLOW-DOWN
Blow-off
receiver pressure
Receiver pressure
Receiver Pressure
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.
blow-down valve

44. Nomination and grouping
Safety Valve
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Protects the compressor and engine.
Blows off the air receiver pressure when it exceeds the preset value.
XAS 185 CD PSI
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

45. Compressor Running Conditions
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Major running conditions :
UNLOAD Receiver tank pressurized, no air being used
LOAD Receiver tank pressurized, air is being used
BLOW-DOWN Machine stopped, blow-off of receiver pressure
There are four states the compressor can be in: lo-load, unload, load and blow down. Each condition is explained in detail in the following pages.

46. Electrical System

47. Nomination and grouping
Electrical System
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
12 Volts Dc
Alternator has built in voltage regulator
B+ Positive to recharge battery
B- Ground
W Frequency for tachometer (if equipped)
D+ Ground when alternator is turning less than 650RPM
12 Volts when turning more than 650RPM

48. Nomination and grouping
Electrical System
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel
Starting system
cuts-out starter motor when engine is running
Safety shut-downs
Compressor :
Compressor element outlet temperature (248ºF/120 C)
Engine :
Coolant temperature (221ºF/105 C)
Oil pressure (17psi)
Low fuel level (5%)
Alternator not charging
Fail safe as a loose wire will result in a shut-down
Good electrical contacts are important

49. Electrical System / Std Unit
Nomination and grouping
Principle data
Compressor systems
Running conditions
Electrical system
Instrument panel

50. Control Panel Ignition Switch General Alarm Lamp Comp Temp Lamp
32. Vision
Atlas Copco’s vision is to be first in mind and first in choice of our customers. That includes products as well as services related to the “use of products”. When we are the first supplier that customers and prospects think of, and the one they buy from, then we are the leader in that business. We strive to maintain global leadership status in areas such as air and gas compression, air treatment, industrial manufacturing, the automotive after-market, rock excavation, light construction and demolition, and repair and maintenance. We also want to be a leader in the equipment rental industry in selected regions. We measure our vision and follow-up on customer shares.
Ignition Switch
General Alarm Lamp
Comp Temp Lamp

51. Control panel is
Mounted at the
rear of the unit
More visible and user friendly

52. 10 AMP Circuit Breaker Behind Control Panel
Working Pressure
Compressor temp
Hour Meter
Test /
Cold Start
Fuel Gage
10 AMP Circuit Breaker Behind Control Panel
General alarm
Ignition Switch

53. Service Kits XAS 185 CD Kit number Designation 2911 0051 00 Unloader
Piston Seal
Oil separator

54. Preventive Maintenance Kits
54. Atlas Copco in Brief
The Atlas Copco Group is a global industrial group of companies developing, manufacturing, and marketing products and services to a wide range of customers and end-users. A world leader, the Group provides compressed air and gas equipment, generators, construction and mining equipment, assembly systems, electric and pneumatic tools, and related services and equipment rental.
The Atlas Copco Group owns well-known brands such as Atlas Copco, RSC, Prime Energy, Chicago Pneumatic.
The head office is in Stockholm, Sweden. The Group has approximately employees in some 70 countries. In 2003, the Group reached revenues of MSEK with 98% of revenues outside Sweden.

55. Maintenance DAILY Check engine oil level Check compressor oil level
Check air filter vacuum indicator
Empty air filter dust trap

56. Maintenance 50 HOURS Check battery terminals and charge
Check tire pressure / re-torque wheel lug nuts
Check drawbar bolts
Check for leaks in the air, fuel, and oil system
Check engine minimum / maximum speeds
Lubricate door hinges / locks / etc.

57. Maintenance Perform 50 hour maintenance plus: 250 HOURS
Change engine oil and filter
Clean the oil cooler / radiator
Clean fuel tank
Change fuel filters

58. Maintenance 500 Hours/Annually Perform the 250 hour maintenance plus:
Change compressor oil and filter
Replace the air filter elements

59. Perform 500 hour maintenance plus:
1000 Hours/Annually
Perform 500 hour maintenance plus:
Adjust valves on engine
Replace Air oil separator
Test safety valve
Test operation of engine and compressor
safety switches and relays
Repack or Grease wheel bearings

60. Special Torque values Wheel nuts 59 lb.ft (+7-0)
Axle - beams lb.ft (+/-7)
Drawbar - axle lb.ft (+/-7)
Drawbar - bottom 59 lb.ft (+/-7)
Towing eye - drawbar 59 lb.ft (+/-7)
Lifting eye - flywheel housing 151 lb.ft (+15/-0)
Engine - drive housing (M12) 59 lb.ft (+/-7)
Engine - drive housing (M14) 92 lb.ft (+/-7)
Compressor - drive housing 59 lb.ft (+/-4)
Safety switches lb.ft (+/-4)

61. Contact Numbers Main Number Atlas Copco Technical Support
Option 3
Ed Kukfisz – Compressors – Supervisor
direct & mobile
Andrew Stevenson – Compressors: Low Pressure
direct & mobile
Andrew Calendar – Compressors: High Pressure
direct & mobile
Scott Ellinger – Compressors
direct & mobile
Robert Walsh – Generators – Supervisor
direct (mobile)
Will Hudson – Generators/Compressors
Ext & mobile
Brandon Hobbs – Hydraulic Attachments /Handheld Construction Tools – Supervisor
direct & mobile
Al Eckenfels – Hydraulic Attachments/Handheld Construction Tools

62. Committed to sustainable productivity.