Hydraulic Oils, Filtering And Cooling; Oil Filter - JCB XR Serie Manual Del Usuario

13

Hydraulic Oils, Filtering and Cooling

Introduction
Generally speaking the hydraulic oil specified for the carri-
er can be used in the Trencher. However, since working
with the Trencher will heat the oil much more than excava-
tion work, the viscosity of the oil must be checked period-
ically when working in hot climates.
When the Trencher is used continuously, the temperature of
the hydraulic oil normalises at a certain level depending on
conditions and the carrier. At this temperature, the viscosi-
ty of the hydraulic oil should be
o
E).
The Trencher must not be started if the viscosity of the
hydraulic oil is above 1000 cSt (131
the viscosity of the hydraulic oil is below 15 cSt (2.35
Possible Result of using incorrect Oil
Oil too thick:
- Difficult start up.
- Stiff operation.
- Danger of cavitation in the pumps and motor.
- Sticky Valves.
- Filter bypass, impurities in oil not removed.
- Motor runs slowly.
Oil too thin:
- Efficiency losses (internal leaks).
- Damage to gaskets and seals, leaks.
- Accelerated wearing of parts, because of decreased
lubrication efficiency.
Note: We recommend different hydraulic oils for use in
summer and winter if there is an average temperature
difference of more than 35
Special Oils
In some cases special oils (e.g. biological oils and non-
inflammable oils) can be used with the Trencher. Observe
the following aspects when considering the use of special
oils.
- The viscosity range in the special oil must be in the
given range (15 - 1000 cSt).
- The lubrication properties must be good enough.
- The corrosion resistance properties must be good
enough.
Note: Although a special oil could be suitable for the
carrier, it may not be suitable for the Trencher. Please check
with your JCB Distributor.
JCB OWNERS SHOULD ALWAYS CONSULT THEIR JCB
DISTRIBUTOR BEFORE CHANGING THE MACHINE
HYDRAULIC OIL.
All manuals and user guides at all-guides.com
OPERATION
20 - 40 cSt (2.90 - 5.35
o
E) or operated when
o o
C (95 F).
Hydraulic Oil Purity
No separate filter is required for the Trencher. The carrier's
oil filter will clean the oil flowing through the Trencher. The
purpose of the oil filter is to remove impurities from the
hydraulic oil since they cause accelerated component
wear, blockages and even seizure. Impurities also cause
the oil to heat and deteriorate. Air and water are also impu-
rities in oil. Not all impurities can be seen with the naked
eye.
Impurities enter the hydraulic system:
- During hydraulic oil changes and refilling.
- When components are repaired or serviced.
- When the Trencher is being installed on the carrier.
- Because of component wear.
o
E).

Oil Filter

The carrier oil filter must fulfil the following specifications:
- The oil filter must allow maximum particle size of 25
microns (0.025 mm).
- The oil filter material must be man-made fibre cloth
or very fine gauge metallic mesh to withstand pres-
sure fluctuations.
- The oil filter must have a volume flow capacity of at
least twice the Trenchers maximum flow.
In general, oil companies guarantee new oils to have a
particle count of 40 microns maximum. When adding oil to
the system the oil must be filtered.
A1461-1
13