We offer a free strip and quote service on all hydraulic and pneumatic rams.
Click here
for
new hydraulic rams.
A
brief introduction to hydraulic cylinder repair:
A hydraulic cylinder is also referred to as a hydraulic
ram. In many cases, repairing a cylinder can result in
significant savings when compared with the cost of
purchasing a new one and in most cases the repaired
cylinder will be in as good as new condition. This is
due to when a hydraulic cylinder is repaired parts can
be salvaged or refurbished making the service of the
cylinder cost effective. The feasibility of a repair to
a ram is determined simply by the cost of a new cylinder
and the more parts that are salvaged the more likely
that the repair will be worth while. The condition of
the cylinder when it enters our workshop is therefore
important as this determines what parts can be reused.
Regular preventative maintenance will therefore be more
cost effective than waiting for a cylinder to fail
before having it serviced and when this factor is also
coupled with possible down time, the benefits of planned
maintenance will far out weigh an ad hoc repair. When a
ram first displays signs of failure usually through
leakage, failure to make pressure or a scored piston, it
can lead to a rapid decline in operability and parts can
quickly be damaged beyond repair.
We find that with OEM pricing on new cylinders we can
make savings on complete new cylinders and we can always
beat their lead time.
Early signs to look out for
1) A
scored
piston
will prevent a wiper seal from cleaning the rod and will
in fact damage the wiper seal over a period of time.
This allows dirt to travel past the wiper seal and into
the hydraulic system, which will damage the cylinder and
all other components in the system. Once contamination
is in a system it can be very difficult and costly to
totally eradicate and if it is left untreated will
result in very expensive maintenance to the whole
system. Damage to the rod can occur from an external
impact or if the score marks are concentrated in a
definite line can be due to a bent rod, side loading or severe bearing
wear.
2)
External leakage
is usually due to seal failure, but can also due to a
cracked tube or neck ring and a defective or damaged
weld. An early sign could be the piston permanently
having a film of oil on it, catching the leak at this
stage could save money on the repair costs. A leak will
only get worse over time and the ram will become
less and less efficient. External leakage apart from
been very messy can also lead to the oil volume becoming
low and components becoming starved of oil. Starvation
of oil to a pump or cylinder will lead to rapid failure
and possibly damage the equipment beyond repair. The
loss of oil from a system also carries an environmental
risk especially for water based, offshore and sub-sea plant.
3)
Failure to make pressure or hold under load
could be due to oil bypassing the double acting seal.
When a defective cylinder is inspected internally often
all parts may look okay to the eye, this can be due to
uniform wear over time. Manufacturers of seals will
publish the tolerances at which their seals will work
and if these are exceeded the seal can extrude. An
inspection of all parts and tolerances by accurate
measuring equipment must be carried out before a ram can be rebuilt.
Remember a ram repair will return a cylinder to a "good
as new" condition at a fraction of the cost of a new
cylinder.
Click
below to see rams being repaired.
Large Cylinder
Brand cylinders
we service include
-
Parker
-
Rexroth
-
Vickers
-
Liebherr
-
JCB
-
Caterpillar
-
Komatsu
-
Edbro
-
Clark
-
Enerpac
-
Hunger
-
Macgregor
