MEASURING THE CRIMP
When measuring a crimp position the caliper at the center of
the crimp length, or the appropriate band (as indicated in the
crimping diagrams), as shown in Figure 19 . This is because
some taper may exist between the ends of the crimp .
Two Piece Couplings One Piece Couplings
FIGURE 19
Correct position to measure the crimp diameter along the length of the ferrule
The crimp diameter must always be measured on the flats
180° around the coupling, NOT on the protruding ridges,
as shown in Figure 20 . For -8 and larger couplings place the
coupling against the rear of the caliper jaw and use the wide
flat area to measure . For -4 and -6 couplings use Notched end
of the Gates Stainless Steel Digital Calipers, place the small
flats at the end of the jaw against the flats on the coupling .
Always measure the crimp diameter from the depressed flat
area of the ferrule; DO NOT place the notches over protruding
ridges of the coupling .
Measuring -8 and larger couplings Measuring -4 and -6 couplings
FIGURE 20
Measuring the crimp outside diameter on the flats between the ribs
CRIMPER ADJUSTMENT
Should the actual crimp diameter not be within the tolerance
specified in the crimp data charts, check the calibration of the
crimper . If the calibration is correct a slight adjustment of the
crimper setting may be necessary .
To find the right adjustment to the setting, refer to your specific
crimper’s operating manual . When the setting has been calculated
and your new crimp is within the specified tolerance, make sure to
record your new approximate setting in the space provided in this
manual under “User’s actual setting” for future reference .
CLEANING THE HOSE
After the assembly has been successfully crimped it should be
cleaned in order to prevent contamination of the system onto which
it is being installed . This should be done with all assemblies since
particulates from the cutting or crimping process and other debris
may have entered the hose during fabrication .
Common methods of cleaning the hose assembly include
blowing through the assembly with shop air or a much more
effective method is the use of a shuttle . The Gates MegaClean
system uses foam projectiles to remove debris from hoses and
assemblies . For particularly difficult jobs multiple projectiles
may be fired from each end or a solvent such as water or
alcohol may be applied to the pellets .
7
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HOSE ASSEMBLY GUIDE