5–20
AP0902
Maintenance
5.7.5
Hydraulic oil return filter
The red warning light 19/39 on the instrument panel monitors the filter. The filter element
must be replaced:
•
If warning light 19/39 comes on when the hydraulic oil is at operating temperature
•
At the latest after 1200 service hours or once every year.
In cold weather warning light 19/39 may come on immediately when the engine is started.
This is due to increased oil viscosity. In this case:
☞
Set engine speed so that the warning light goes out
☞
Bear in mind the instructions concerning warmup – see When the engine has started ...
on page 3-16
Changing the filter element
Important!
Contamination may cause severe damage in the hydraulic system!
☞
Take care to avoid contamination when working!
☞
Proceed as follows:
•
Switch off the engine
•
Open the engine cover
•
Open breather A on the hydraulic oil tank
•
Unscrew caps F and 154/1 of the filter by about 2 turns and wait for the oil level in the
filter housing to fall to the level in the tank
•
Completely unscrew and remove covers F and 154/1 of the filter
•
Pull out the filler pipe 154/2 with the filter element 154/3, turning them slightly
•
Pull the filter element 154/3 off the filler pipe 154/2 and dispose of the filter element
•
Check that the flat gasket 154/4 on the filter cap 154/1 and the O-ring 154/5 on the
filler pipe are in good condition
•
Fit new O-rings if the old ones are damaged
•
Slide the filler pipe 154/2 onto a new filter element 154/3 and insert the assembly into
the filter
•
Tighten caps 153/F and 154/1 by hand [Torque: 15 ft-lbs (20 Nm)]
•
Tighten breather filter 153/A by hand
•
Carry out a test run of the hydraulic system
With the engine switched off:
•
Check the filter for leakage
Fig. 153: Position of hydraulic oil return filter
A
F
308b1100.eps
Fig. 154: Return suction filter: exploded view
2
1
2
3
4
5
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: ......