Hydraulic Rock Drill COP RR14 / SC14 Ver. C 11 Lubrication
56 No: 4124851851.2.9007203379904011 en-US
• Flow losses in the hydraulic lines are increased. The high flow losses amplify energy
consumption and pressure levels, and put increased strain on seals.
• The risk of cavitation increases, which leads to the risk of damage to the rock drill and
hydraulic pumps.
The hydraulic fluid must be changed at regular intervals
Oil viscosity changes during the period that the hydraulic fluid is used. In general, viscosity
will drop with increased operating hours. To ensure that the viscosity of the fluid does not
drop to a critical level before the recommended service interval, a hydraulic fluid of suffi-
cient stability must be used. In compliance with DIN 51350-6, viscosity of suitable hydraulic
fluids shall drop a maximum of 25% when tested at 100 ºC for shear stability.
Factors influencing the interval between changes are:
• Viscous stability of the hydraulic fluid as specified above. The hydraulic fluid must be
changed before the viscosity drops to a critical level.
• Contamination with water. If the hydraulic fluid becomes cloudy and light grey, the wa-
ter content has become such that the hydraulic fluid must be changed.
• Deterioration of properties such as oxidation inhibition and anti-foaming.
11.1.2 Pneumatic Tool Oil
Pneumatic tool oil is used for cooling and lubricating your rock drill. Depending on ambient
temperature, the oil should have the following viscosity grades if the viscosity index (VI) is
about 100:
Ambient Temperature C° Viscosity
-30 to ±0 VG 32-68
-10 to +20 VG 68-100
+10 to +50 VG 100-150
The tool oil must have an EP additive which covers the following load-bearing properties:
Referenced Standard Load-Bearing Property
ASTM D 2783 Min. 250 kg
ASTM D 4172 (40 kg) Max. 0.5 mm
The tool oil should also have the following properties:
• The oil must have good lubricating properties, intended for compressed air tools.
• The oil must have good adhesion capacity.
• The oil must have additives that prevent foam formation.
Epiroc recommends the use of Epiroc COP OIL which has been specially developed for
our hydraulic rock drills. COP OIL is an environmentally friendly, biodegradable oil, which
can be used in ambient temperatures between -25 ºC and +50 ºC. COP OIL can be or-
dered with the following part numbers:
1 Can of 4 litres 1 Can of 20 litres 24 Can of 20 litres 1 Barrel of 208 litres
3115 3125 02 3115 3125 01 3115 3126 01 3115 3127 00
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