Warner Electric L Series 310 User Manual
Page 8
8 Warner Electric Europe • +33 (0)2 41 21 24 24
P-2072-WE • 2/13
LUBRICATION
The aim of lubricating multidisc clutches and brakes with a steel/steel or steel/sintered bronze disc friction is:
• To reduce the wear during transmission of the dynamic torque (acceleration or slowing-down)
by avoiding a dry friction.
• To dissipate the friction heat and ensure an efficient cooling and the thermal balance
• To eliminate the impurities produced by the friction or metallic surfaces.
On unsealed units type H.BJ with a stationary distributor, the oil used must have the following basic qualities:
•
A low kinematic viscosity:
We recommend a viscosity of 7,5 to 20 Cst (1,6 to 2,9º Engler) at a temperature of 50º C. It is of course
sometimes necessary to reach a compromise to take the lubrication of other neighboring organs into account.
We however advise not to exceed a viscosity of 40 Cst (5,34º Engler).
•
No High-Pressure Additive:
These are generally products on chlorine, sulphur, phosphorus, lead etc. basis. For example, chlorine has a
corrosive action on some alloys, such as sintered bronze which is used as a lining on some type of our disc
Moreover, high pressure additives increase the resistance of the oil film to high pressure. This results in an
unctuous, or even hydrodynamic operation (dynamic work - clutch or brake off) to dry operation (static work
clutch or brake on) difficult to even impossible.
•
A High Viscosity Index (over 80):
Since the oil viscosity varies according to the temperature, the requirement is for lubricants with which these
variations are small as possible. The higher the viscosity index, the smaller the viscosity variations.
•
A Good Resistance to Oxidation:
Under the influence of air, temperature as well as some catalysts, the oil is subject to ageing, it thickens,
changes color, dilapidates and loses its original properties. The oil change frequency partially depends on
this quality. The property is improved by adding anti-oxidation agents to the oil.
Some of the oils that can be used are listed in the chart below. They all fulfilled the conditions describes
above. This chart is however not exhaustive and all the oil companies can propose equivalent oil qualities
enabling a proper operation of our clutches and brakes.
Lubrication fluid for electromagnetic,
pneumatic and mechanical units
Lubrication and control fluid for
hydraulic units
ELF:
SPINELF 10
TOTAL:
AZOLLA ZS 22
MOBIL:
VELOCITE OIL Nº6
SHELL:
TELLUS C
ELF:
ELFMATIC G2
TOTAL:
DEXRON
MOBIL:
STF 220
SHELL:
DONAX TM