AC Hydraulic WN11 Mode D'emploi page 3

WN11, WN15
GB
WN20, WN25
WARNING -
Safe usage instructions
1. Study, understand and follow all instructions before
operating this crane.
2. Do not exceed rated capacity.
3. Only use slings and chains with a capacity greater
than the load.
4. Ensure that the load cannot slide or swing during
transport.
5. It is forbidden to stay under a suspended load
6. Legs and extension jib must always be secured
with studs and safety pins.
7. Use only on hard level surface.
8. Lower load to lowest position before transporting.
9. No alterations shall be made to this crane.
10. Failure to follow these warnings may result in per
-sonal injury and/or property damage.
Assembly:
1. Mount fixed wheel (19) with axles and circlips, and
then revolving wheels (21) with screws, washers
and nuts.
2. Raise and mount the mast (3) with screws (22),
washers (12) and two nuts (23).
3. Mount main jib (2) on mast using axle (9) and
circlips (16).
4. Mount the hydraulic unit (6) with axle (5) og circlips
(14).
5. Secure the hydraulic unit with screw (20).
Use:
Lifting: Activate pump handle using full strokes.
Lowering: Slowly turn the release handle counter
clockwise. The spring in the release handle
causes it to close automatically.
The extension jib can be adjusted to different positions
when removing the spike (7). Remember to secure the
jib again with spike and safety pin.
Maintenance:
Maintenance and repair must always be carried out by
qualified personnel.
Daily: Inspect crane for damage.
Monthly: Grease pump piston thrust pad, and oil
handle axle and main jib axle. Also inspect the crane
for unusual wear and tear.
Oil refill: Refill through the filling hole in the cylinder
using an oil can. Correct oil level is up to lower edge
All manuals and user guides at all-guides.com
of filling hole (28) with the jib fully down. Too much oil
causes poor pumping.
Quantity of oil WN11, WN15: 0.8 l.
Quantity of oil WN20, WN25: 2 l.
Any good hydraulic oil of viscosity ISO VG 15 can be used.
NEVER USE BRAKE FLUID!
Safety Inspection:
In accordance with national legislation – minimum
once a year though – the crane must be inspected by
a professional: damages, wear and tear, safety catch
on the hook, adjustment of the safety valve, hydraulic
unit for leakages. Furthermore that all safety labels are
legible.
Trouble shooting:
1. The crane does not lift to maximum position but the
pump retains pressure: refill with oil.
2. Poor pumping (half strokes): vacuum in the reser
voir. Loosen the filling plug (28) and verify oil level.
3. The load is dropping: verify release handle is
closed and release spring (dead man's control) is
properly adjusted. Pre-tension of spring (40/38) is
max. half a turn. If this is not the cause, then the
pump needs repair (worn seals or valves).
Spare parts:
Replace worn or broken parts with original spare parts
only. All major parts may not be available after disconti-
nuation of a model.
Destruction:
Oil must be drained off and legally disposed of.