Service Information Document Title: Hydraulic system contamination
Function Group: oil 900
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic system oil contamination Microscopic Contamination Microscopic contamination occurs when excessive fine particles of foreign material are in the system oil. These particulates are too small to see or feel. Examples of contamination problems caused by excessive particulates would include the following:
cylinder rod seals leak, control valve spools do not return to neutral, and/or hydraulic circuit has a high operating temperature.
Sense Contamination Sense contamination is foreign matter found by sight, touch or smell. This type of contamination can cause a sudden failure of a hydraulic component. Examples of sense contamination are:
particles of metal or dirt in the system oil, air in the system oil, system oil dark and thick, odor of burned system oil, and/or water in the system oil. Water will cause oil to become white in color.
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Service Information Document Title: Function Group: Working hydraulic system, 900 description
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Working hydraulic system, description The circuit contains an implement pump that pulls system fluid from the hydraulic tank and delivers it to the lift and tilt cylinders and the auxiliary function via a three-spool main control valve assembly with an open center. For more detailed information, see 990 Hydraulic diagram and forward.
Service Information Document Title: Hydraulic oil, description
Function Group: 900
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic oil, description The machine is standard-equipped with mineral-based hydraulic oil and bio–oil is available as an option. The hydraulic oil contains selected additives that give good oxidation stability, good corrosion protection and good lubricating characteristics.
Service Information Document Title: Function Group: Hydraulic oil, storing and 900 handling
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic oil, storing and handling
Hydraulic oil should be stored in tightly sealed tanks or barrels. Only containers intended for transport of hydraulic oil may be used for this purpose. Hydraulic oil should be stored indoors or in temperature-controlled facilities. If hydraulic oil is stored outdoors, the barrels should be stored horizontally to prevent penetration of water and eradication of barrel markings. In order to avoid condensation, oil should not be stored in temperatures above 60 °C (140 °F), or be exposed to intense sunshine or cold temperatures.
Service Information Document Title: Function Group: Hydraulic components, 900 cleanliness when handling
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic components, cleanliness when handling WARNING Hot hydraulic oil and hydraulic oil under pressure may result in severe personal injuries
NOTICE It is very important to keep the hydraulic system free from any impurities, as these can cause abnormal wear and may lead to expensive downtime. Greatest possible cleanliness should be maintained during all handling of hydraulic components and hydraulic oil. NOTE! A vacuum pump should be used for work on the hydraulic system in order to avoid oil spills.
Service Information Document Title: Function Group: Hydraulic system, repair of 900 hydraulic components in workshop
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic system, repair of hydraulic components in workshop
Always wear clean coveralls and maintain strict personal cleanliness. Work with hydraulic components should be performed separate from other work in the shop, in a so-called "clean room". The room should have good ventilation and the floor should be coated with a binding material. Machining, grinding, etc. must not be performed in the "clean room". The workplace should be equipped with thoroughly cleaned tools and suitable containers for cleaning hydraulic components. Containers used for cleaning hydraulic components must not be used for other cleaning. The containers should be cleaned often and filled with new fluid. Clean all components that are going to be handled in the "clean room". Do not use caustic soda solutions or similar, which will result in corrosion. Always plan work on the hydraulic system so that it can be completed without long interruptions. When cleaning during repairs – use dry and clean compressed air for drying, not rags. When work is completed, always plug components with clean plastic plugs of suitable dimensions and package them. When cleaning the "clean room" – use methods that do not stir up dust and dirt.
Service Information Document Title: Function Group: Hydraulic components, 900 storage and transport
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Hydraulic components, storage and transport
All hydraulic components should be stored in plastic bags or plastic foil and they should be plugged. The packaging must not be opened until the component is to be used. Service vehicles should be equipped with an interior which facilitates good order and cleanliness. Each service vehicle should have a roll of plastic foil, plastic plugs of the most common dimensions and plastic containers for components. Plugs and foil should be of the disposable type, that is, for one-time use only.
Service Information Document Title: Function Group: Connecting/disconnecting 900 vacuum pump instructions
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB]
Connecting/disconnecting vacuum pump - instructions Op nbr 91003-2 14360000 Vacuum pump / 24V 9993884 Converter
14360045 Adapter 11063800 Hose
Figure 1
1. 2. 3. 4.
14360000 Vacuum pump / 24V 9993884 Converter 14360045 Adapter 11063800 Hose
WARNING Hot hydraulic oil and hydraulic oil under pressure may result in severe personal injuries
Mounting NOTE! The engine must not be running when the adapter is connected to the breather filter. This means a risk of pump breakdown. 1. Put the machine in service position 2, see 191 Service position 2.
2. Remove the cap from the hydraulic tank
Figure 2
3. Connect 14360045 Adapter to 11063800 Hose.
Figure 3
4. Connect the hose to the oil filler.
Figure 4
5. Connect the suction hose to the adapter and place the vacuum pump on a stable surface. 6. Connect the vacuum pump to the 9993884 Converter.
Figure 5 Converter 7. Connect the converter to the socket in the cab.
Figure 6
8. Start the vacuum pump. 9. Let the pump work for 2 - 3 minutes so that the vacuum stabilizes. 10. Check-adjust the vacuum pump to (min) max. -300 mbar (-0.03 MPa) (-4.35 psi) when the system has been opened.
Figure 7
1.
Adjusting screw
NOTE! If the pressure goes lower than -300 mbar, there's a risk that the hydraulic pump axle–seals let trough dirt and engine oil into the hydraulic system.
Removing
11. Turn off the electric power to the vacuum pump. 12. Unplug the plug from the socket. 13. Remove the adapter. Replace the oil fill.
Service Information Document Title: Function Group: Hydraulic system, relieve 900 pressure
Information Type: Service Information
Date: 2014/3/19
Profile: SSL, MC80B [GB] Go back to Index Page
Hydraulic system, relieve pressure Op nbr 900-003
Mechanical controls The machines are equipped with one (MC60B, MC70B, MC80B and MC90B) or two (MC110B) accumulators.. To be able to work in a safe way with the hydraulic system it is necessary to relieve all pressure before opening the system. Perform the instruction as follows
WARNING Hot hydraulic oil and hydraulic oil under pressure may result in severe personal injuries 1. If the machine is equipped with cab door, close the door. 2. Lower the seat bar. 3. Start the engine. 4. Press the lift/tilt lockout switch. 5. Stop the engine. 6. Put the key in ON position. 7. Press the lift/tilt lockout switch. 8. Auxiliary hydraulics, relieve pressure Alternately press the buttons for the auxiliary function approximately 20 – 30 times. 9. Working hydraulics, relieve pressure Operate the foot pedals between extreme positions. 10. Transmission hydraulics, relieve pressure Operate the controls handles between extreme positions. 11. High flow hydraulics, relieve pressure When the High flow system is not activated the fluid in the system drains slowly to tank. Wait at least two minutes before opening the High flow circuit. 12. Parking brake circuit, relieve pressure (MC110B only) When the engine is off, the fluid in the parking brake circuit drains to tank. No separate instruction is needed.
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