OM 25-3503 us – Edition 4.1 * 2503_3503b410.fm 4-3
Malfunctions
4.1 Malfunctions of the Powertilt unit
Contact a Wacker Neuson service center in case of malfunctions or signs that
are not listed in the following tables or that persist after maintenance has been
performed correctly.
Problem Possible causes See
Powertilt does not maintain its position.
If the excavator applies too much pressure against an obstacle, this
can build up pressure in the Powertilt swivel device that activates
the internal decompression valve.
Oil escapes from the control valve.
Malfunctioning decompression valve.
Oil escapes from the seals.
Powertilt turns only in one direction.
Malfunctioning internal decompression valve.
Both lines are connected to either the P1 or P2 connections of the
Powertilt swivel device.
Inexact lateral Powertilt movements.
Air in Powertilt swivel device or hydraulic system.
Hose/pipe diameter/length is larger/longer than recommended.
Reverse and forward movement of shaft in housing (axial
play of shaft).
Worn or missing pressure disks.
Lateral bucket movement. A little play due to necessary spacing between teeth is normal.
Grease cannot be applied to Powertilt grease zerks.
Malfunctioning grease decompression valve of lubrication system,
or grease decompression valve has been replaced by a grease zerk
or plug.
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