Repairs
30
Service manual
Replacing the latches at the seat and back sections
Head plate and leg plate are locked by means of latches.
The locking mechanism can be replaced.
h
In case one of the latches has got jammed,
push the release button, so that the bolt
protrudes at the inside of the frame. Seize this
part of the bolt by means of a pair of pliers and
turn the bolt with the latch until the latch slides
back into its guiding.
Removing the latches
At the sides of the locking devices there is a compressor
inside a bearing. This compressor consists of a stud bolt
with a screwed-on latch. The latch together with the bolt
are pressed to the outside by means of a pressure spring.
The locking mechanism inside the seat section is
equipped in addition with a washer at the inside.
•
Detach the claddings at the underside of the seat or
back section – at the back section, also the pushing
handle.
h
The threaded bolts are secured by means of
screw locking varnish. They have probably to be
heated before they can be unscrewed.
•
Screw the bolt out of the threaded hole of the latch,
pull the bolt out of the guiding and pull the latch, the
pressure spring – and at the seat section, also the
washer – downwards and out.
Installing the latches
•
Insert a latch into the inner guiding, its groove pointing
towards the receiver. Apply screw locking varnish and
push the bolt, its smaller portion first, into the threaded
hole in the latch.
•
Insert the pressure spring – at the seat section, also the
washer – behind the latch using a pair of pointed
pliers, push the thread of the bolt to the threaded hole
of the latch, and tighten the bolt.
•
Check the function of the latch and close the cladding
at the underside.
Stud bolt
Latch
Compression
spring
Washers