© Motor City Wash Works, Inc. 48285 Frank, Wixom Michigan 48393 U.S.A.
Phone: 248.313.0272 ▪ Fax: 248. 313.0271
8MANULHYDDOC0004 REV 1.0
www.motorcitywashworks.com
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Hydraulic Hoses Routing and Installation:
Improper installation and routing of hose assemblies is one of the major causes of premature
hose failure. Below is a guide to best practice when installing and routing hydraulic hose
assemblies.
1. Hose Length
When pressurized, a flexible hose assembly
can change length by as much as +3% or -
6% compared to its original length.
Always provide some slack in the hose to
allow for this shortening or elongation
however, excessive slack in hose lines may
cause poor appearance.
2. Hose Rotation
If a hose is installed with a twist in it, operating
pressure will try to force it straight. This can loosen
the end fitting nut or cause reinforcement
separation which can result in hose failure at the
point of greatest stress.
The printed lay line (printed information) on the hose
is a good indication of this. If twisted and the
assembly includes a swivel nut end fitting, loosen the
swivel nut, untwist the hose, and retighten.
An assembly with two elbow end fittings will twist if
the end fittings are not in proper relationship to each
other.
