Malfunctions Of The Powertilt Unit - Wacker Neuson 2503 Operator's Manual

4.1 Malfunctions of the Powertilt unit

Problem
Powertilt does not maintain its position.
Powertilt turns only in one direction.
Inexact lateral Powertilt movements.
Reverse and forward movement of shaft in housing (axial
play of shaft).
Lateral bucket movement.
Grease cannot be applied to Powertilt grease zerks.
OM 25-3503 us – Edition 4.1 * 2503_3503b410.fm
Possible causes
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.
Malfunctioning internal decompression valve.
Both lines are connected to either the P1 or P2 connections of the
Powertilt swivel device.
Air in Powertilt swivel device or hydraulic system.
Hose/pipe diameter/length is larger/longer than recommended.
Worn or missing pressure disks.
A little play due to necessary spacing between teeth is normal.
Malfunctioning grease decompression valve of lubrication system,
or grease decompression valve has been replaced by a grease zerk
or plug.
NOTICE
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.
Malfunctions
See
4-3