53
Installation, Operation and Maintenance Manual
MAN 564 Rev. 6
June 2020
Maintenance
Section 5: Maintenance
5.4
Lubrication of Mechanism
For normal duty the scotch yoke mechanism of the actuator is lubricated "for life". In case
of high load and high frequency of operation it may be necessary to periodically restore
lubrication: it is advisable to apply a generous coating of grease on the contact surfaces of
the yoke and bushings, on the yoke link grooves, on the sliding blocks, on the guide bar.
For this operation it is necessary to disassemble the mechanism cover. In larger actuators
the lubrication can be performed through the inspection holes of the cover after
removing the plugs.
The following grease is used by Biffi for standard working temperature and suggested
for re-lubrication:
Table 23.
AGIP MU/EP/2
AEROSHELL GREASE 7 or equivalent
To be used in standard
temperature conditions
(-30 °C/+85 °C)
To be used in
low temperature
conditions
(-60 °C/+65 °C)
NLGI consistency:
2
Color:
Buff
Worked penetration:
280 dmm
Physical state:
Semi-solid at ambient
temperature
ASTM Dropping Point:
185 °C
Odor:
Slight
Base oil viscosity at 40°C: 160 mm²/s
Density:
966 kg/m³ at 15 °C
ISO Classification:
L-X-BCHB 2
Flash Point:
> 215 °C (COC)
(Based on synthetic oil)
DIN 51 825:
KP2K - 20
Dropping point: 260 °C (ASTM D-566)
Equivalent to:
ESSO BEACON EP2
BP GREASE LTX2
SHELL ALVANIA GREASE R2
ARAL ARALUB HL2
CHEVRON DURALITH
GREASE EP2
CHEVRON SPHEEROL AP2
TEXACO MULTIFAK EP2
MOBILPLEX 47
PETROMIN GREASE EP2
Product code:
001A0065
Infosafe No.:
ACISO GB/eng/C
