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Wartungs- und Reparaturanleitung
Maintenance and Repair Instruction
3.4
Oil tightness of the double check valve (3) or lowering valve (5)
To test oil tightness of the valve (3) or (5) the function in question must be free from mechanical load and
supported to prevent it from moving.
For types 1118.01 and 1118.02:
Lowering valve (3)
Remove hydraulic lines "A" and "B"
Connect the pressure gauge by means of the measuring adapter included in the tool kit (3111.4913).
Actuate the function "tilting" or "
The pressure must rise to a maximum of 90 bar. Release the pedal. The valve (3) must close.
Within the following 10 minutes the pressure must not drop below 70 bar
Please note the pressure diagram "Y".
If the pressure suddenly drops at the beginning by app. 10...30 bar and remains constant thereafter, bleed the
measuring lines and repeat the measurement.
Lowering valve (5)
Remove the height cylinder
Remove hydraulic line from the cylinder
Connect the pressure gauge to the hydraulic line by means of the measuring adapter included in the tool kit
(3111.4913).
Actuate the function "up" .
The pressure must rise to a maximum of 90 bar. Release the pedal. The valve (5) must close.
Within the following 10 minutes the pressure must not drop below 70 bar
If the pressure suddenly drops at the beginning by app. 10...30 bar and remains constant thereafter, bleed the
measuring lines and repeat the measurement.
10 min
trendelenburg" depends on which valve you check.
1118.0XGB_ 06
Alphaclassic / Betaclassic
1118
1118.01/02
5
10
15
20 min
Page: 12
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