980216
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HCV270 Manual
Page 17 of 22
Rev 9 Issue 2. Date: 25/08/2021
9.5
Seal Detail
IMPORTANT
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Ensure that the hydraulic supply is isolated before proceeding.
IMPORTANT -
Replacement parts must always be sourced from Allspeeds Ltd. The use of unofficial
components will invalidate the warranty and may lead to tool damage or system failure.
IMPORTANT
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Changing the seals will likely result in oil spills. Hydraulic oil spills present slip hazards.
Ensure a safe system of work at all times.
If it is necessary to inspect or renew the hydraulic seals, the cylinder must be removed from the tool.
As an aid to this, 2 off tapped holes are provided in the cylinder end face. These are M10 x 12mm
deep on 130mm PCD. Never use Stilsons or pipe clamps on the cylinder as damage may occur. If in
doubt contact Allspeeds for advice.
A cylinder assembly tool is available if required from Allspeeds (SK4377A).
Begin operation with the blade removed. See section 9.4 for this procedure.
Firstly, remove the coupling, hose and blanking plugs (035256) from the top of the tool and attach
the cylinder assembly tool (SK4377A). This can be used to loosen or re-tighten the cylinder.
IMPORTANT
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Mass of Cylinder (728075) is 55.5kg and Ram (764113) is 26.7kg. Ensure a safe system
of work at all times.
Unscrew the cylinder and remove from the assembly. Use M10 holes to facilitate safe lifting. Care
should be taken as any contained oil within the cylinder will now be free to spill in the work area. The
cylinder will come free but seal stiction may mean that the ram comes also. If this happens, carefully
lay the cylinder assembly down in a safe location, connect a handpump or other hydraulic supply to
the cylinder and pump the ram out of the cylinder. Again, care should be taken as any contained oil
within the cylinder will now be free to spill in the work area.
Figure 8
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Cylinder Removal
