Wacker Neuson 28Z3, Service Manual

Page: 260 / 264

8-30
SHB 28Z3 EN – Edition 2.0 * 28z3s810.fm
PowerTilt PTS06
8.23 Troubleshooting
Problem Possible cause
Troubleshooting
PowerTilt does
not maintain its
position.
Oil escapes from the control valve. Test the component and repair or replace if necessary.
Defective decompression valve
Remove the internal decompression valve and check
for visible damage or dirt. Check the pressure values
of the internal decompression valve (220 – 230 bar)
(3190 – 3336 psi).
Oil escapes from the seals. Test the seals and replace if necessary.
PowerTilt turns
only in one direc-
tion
A one-way valve has been installed. Replace by a two-way directional valve.
Defective internal decompression valve. Test the component and replace it if necessary.
Both lines are connected to either the P1 or P2 ports of the
Powertilt swivel device. Pay attention to the correct positions of the ports – see
chapter 8.5 Exploded views PTS06 on page 8-7.
Inexact lateral
PowerTilt
movements
Air in PowerTilt swivel device or hydraulic system.
Bleed the air from the hydraulic system and determine
the cause.
Hose/pipe diameter/length is larger/longer than recom-
mended.
Install new pipe/flexible lines with the recommended
diameter.
Install the remote-controlled check valve in the lines as
close as possible to the PowerTilt swivel device.
Reverse and for-
wards movement
of shaft in hous-
ing (axial play of
shaft)
Worn or missing pressure discs.
Tighten the end cap according to table Torque values
of end cap on page 8-23. Replace or install pressure
discs as required.
Lateral move-
ment of the
bucket
A little play due to necessary spacing between teeth is normal.
Axial play on the shaft < 0.5 mm (0.02”). Readjust the
play if it is greater. Axial play occurs due to wear of the
axial bearings (discs). If the axial play can no longer be
eliminated, the axial bearings are badly worn and must
be replaced
– see chapter 8.24 Adjusting the play on
the PowerTilt on page 8-31.
PowerTilt does
not take in any
lubricant through
the grease nip-
ples
Defective grease decompression valve of lubrication system,
or grease decompression valve has been replaced by a
grease nipple or plug.
Clean or replace the grease decompression valves of
the lubrication system.