Schwing SP 1800-D, Original Operating Instructions

Page: 322 / 390

4.44-16
002.514.16-EN
TESTING DELIVERY HOSES
Due to natural ageing, rubber hoses may be 6
years old at most (including a storage time of 2
years).
They must be replaced every 6 years from the
date of manufacture, even if they superficially
appear "okay".
For end hoses and connecting hoses, a daily,
external visual inspection is prescribed.
Loose delivery hoses must be tested before
every use.
As wear strongly depends on the operating
conditions (concrete, pressure, delivery rate,
etc.), then the inner side of all new hoses
should be tested for the first time after pumping
approx. 1000 m³ of concrete:
Plan further tests on the basis of the test
results.
VISUAL INSPECTION (EXTERNAL)
- Check the safety catch of a placing boom end
hose for soundness.
- The outlet end of an end hose must not be
"frayed".
- Check all delivery hoses for dents, kinks or
other deformations which are suggestive of
displaced or destroyed hose armouring (steel
cord insert).
- Check the outer skin for cuts, ruptures or
abrasions which entail damage to the hose
armouring.
Hoses with damaged armouring must be
replaced!
VISUAL INSPECTION (INTERNAL)
- Lay the cleaned hose out horizontally and use
a pocket torch.
- Pay attention to points at which the hose
armouring is exposed or protrudes.
- Also pay attention to areas of loose rubber
coating, dents, cuts and areas of local wear.
- Especially check the main wear zones on the
inlet side of the hose. The heaviest wear is
located on the first 30 cm of the rubber
coating (behind the fixing).
Hoses with damaged armouring or excessive
wear must be replaced!
VISUAL INSPECTION OF THE FIXINGS
- Check the fixings for tightness.
The hose and fixing must be firmly connected
together.
- Check the inner sides of the fixings for wear.
- Check the sealing surfaces for damage and
clean these of concrete residue.
Hoses with damaged or loose fixings (hose
creeps out of the fixing) must be replaced!