Fayat Group BOMAG BF 800 C, Service Manual

Page: 21 / 41

General repair instructions
BOMAG 21 008 917 73
1.3
Fuel hoses
Fig. 2
!
Caution
All fuel hoses have two layers of material, a rein-
forced rubber coating outside and an internal Vi-
ton hose. If a fuel hose has come loose one must
make absolutely sure that the internal Viton layer
has not been separated from the reinforced outer
layer. In case of a separation the hose needs to be
replaced.
Gaskets and mating surfaces
Leaking sealing faces can mostly be traced back to in-
correct assembly of seals and gaskets.
l
Before assembling a new seal or gasket make sure
that the sealing surface is free of pitting, flutes, cor-
rosion or other damage.
l
Inappropriately stored or handled seals (e.g. hang-
ing from hooks or nails) must under no circumstanc-
es be used.
l
Assemble seals and gaskets only with sealing com-
pound, grease or oil, if this is specifically specified
in the repair instructions.
l
If necessary remove any old sealing compound be-
fore assembling. For this purpose do not use any
tools that could damage the sealing surfaces.
l
Sealing compound must be applied thin and evenly
on the corresponding surfaces; take care that the
compound does not enter into oil galleries or blind
threaded bores.
l
Examine the contact faces for scratches and burrs,
remove these with a fine file or an oilstone; take
care that no grinding dust and dirt enters into
tapped bores or enclosed components.
l
Blow out lines, ducts and gaps with compressed air,
replace any O-rings and seals that have been dis-
lodged by the compressed air.
Assembly of radial seals
Fig. 3
l
Lubricate the sealing lips (2) (Fig. 3) with clean
grease; in case of double seals fill the space be-
tween the sealing lips with a generous amount of
grease.
l
Slide the seal over the shaft, with the lip facing to-
wards the fluid to be sealed.
i
Note
If possible, use an assembly sleeve (1 (Fig. 3)), to
protect the lip from being damaged by sharp edg-
es, threads or splines. If no assembly sleeve is avail-