8999145EN: v1 26/02/2020
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Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
5.2
Hydraulic Hose Checks
It is important that hoses are fitted correctly. Always check all hoses to ensure that there are no kinks or sharp
bends, and that the hoses do not chafe against sharp edges. The following guidelines should be used when
checking the hosing of the machine prior to work;
5.2.1
Twists
Hoses should never be twisted or kinked. On most hoses there is a line which runs the full length of the hose
acting as a useful guide. If a visual check reveals that no guideline is present along a hose, refer to Figure 5.2
and conduct the following check;
Loosen any clamps.
Attach one end of the hose to its coupling, but do not tighten.
Place the hose in its required position.
Connect the other end loosely to its union.
Tighten the and with any angled fittings first ensuring it is in the right position for its intended run.
Now tighten the straight end. It is possible that as the nut is tightened the hose may twist slightly.
If this happens, slacken off the nut and turn the hose in the opposite direction to that caused by
tightening. Then, re-tighten the nut bringing the hose back to the central position.
Otherwise tighten the fitting fully. Torque settings for both BSP and Metric hose fittings are shown in
Figure 5.5 below.
Tighten any clamps.
Finally re-bleed the rams and operate the arms in all positions whilst carefully checking for any twists
and obstructions.
Figure 5.2
5.2.2
Sharp Bends
Hoses should always be fitted to allow enough hose radius for free movement, see Figure 5.3. It is also
important to avoid sharp bends in hoses. As a general guideline hoses should not be bent round a radius
smaller than ten times the hose diameter. This will vary with hose construction and any queries about specific
hoses should be addressed to the Spearhead Machinery service department.
Figure 5.3