5–16
AP0902
Maintenance
5.7
Hydraulic system
5.7.1
Specific safety instructions
•
All lines carrying hydraulic oil must be depressurized prior to any maintenance and
repair work. To do this:
☞
Lower all hydraulically controlled attachments to the ground
☞
Actuate the control levers of the hydraulic control valves several times
•
Apply the parking brake to prevent the machine from rolling away before you carry out
service and maintenance work
•
Hydraulic oil escaping under high pressure can penetrate the skin and cause serious
injuries. Always consult a doctor immediately even if the wound seems insignificant –
otherwise serious infections could set in!
•
If the hydraulic oil in the level glass is cloudy, this indicates that water or air has entered
the hydraulic system. This may cause damage to the hydraulic pump!
☞
Contact your dealer immediately
•
Insufficient or incorrect hydraulic oil will result in damage to the hydraulic system! For
this reason:
•
Only use authorized oils of the same type – see Engine fluids and lubricants on
page 5-39
•
Always top up the hydraulic oil before the level gets too low
•
Contact customer service if the hydraulic system filter is contaminated with metal
chippings. Otherwise, additional damage may result!
5.7.2
Checking the hydraulic oil level
☞
Proceed as follows:
•
Park the machine on level ground
•
Retract all the hydraulic cylyinders
•
Switch off the engine
When all the oil has returned to the hydraulic oil tank:
•
Open the engine cover
•
Check the hydraulic oil level 149/A in the sight glass:
Fig. 149: Oil level sight glass on the hydraulic oil tank
A
✓
If the oil level is
•
Is visible in the sight glass
OK
•
Below the sight glass
☞
Top up the hydraulic oil
•
Above the sight glass
☞
Drain the hydraulic oil
Summary of Contents for 418T Wheel
Page 1: ...OPERATOR S MANUAL Form No 418T Wheel Loader 909879...
Page 10: ...Section 1 Introduction 1...
Page 11: ......
Page 22: ...Section 2 Safety instructions 2...
Page 23: ......
Page 36: ...Section 3 Operation...
Page 37: ......
Page 40: ...AP0902 3 3 Overview see overleaf Overview see overleaf...
Page 106: ...Section 4 Troubleshooting...
Page 107: ......
Page 111: ...4 4 AP0902 Troubleshooting Notes...
Page 112: ...Section 5 Maintenance 5...
Page 113: ......
Page 154: ...Section 6 Helpful information for using the service parts list...
Page 155: ......
Page 164: ...Section 7 Specifications 7...
Page 165: ......
Page 177: ...7 12 AP0902 Specifications Notes...
Page 178: ...Annex...
Page 179: ......
Page 189: ...Annex A 10 AP0902 Notes...
Page 190: ......