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9 . Lubrication<br />
9.1 Type of lubricant<br />
The gearbox lubrication is carried out by an oil bath; before the start-up of the gearbox it is necessary to fi ll it with<br />
oil, whilst ensuring visually using the level plug that the correct level is reached; this operation requires particular<br />
attention and the level must be re-checked after a few minutes of operation to ensure it has been carried out<br />
correctly. The quantities of oil shown in the catalogue are purely indicative and vary in function of the reduction<br />
ratio and the type of gearbox input.<br />
9.2 Choice of oil<br />
Any type of oil for mechanical transmissions can be use with EP additives that satisfy the VG68 and VG220 viscosity<br />
classes according to one following standards ISO 3448/SAE 80 - 90W/ SAE J 306-81; in particular cases, oils with<br />
different viscosities can be used, in this event please contact the technical services of <strong>Jahns</strong>. The oil viscosity must<br />
be chosen as a function of the ambient and working temperature of the gearbox. For gearboxes that have to<br />
operate at high ambient temperatures or where there are strong thermal fl uctuations, the use of synthetic based<br />
oils is recommended.<br />
In gearboxes with vertical assembly and continuous operation, the oil can undergo excessive overheating; in this<br />
event an external expansion tank is necessary (this can be supplied by <strong>Jahns</strong>) to enable the oil to expand due to<br />
thermal dilation.<br />
9.3 Oil changes<br />
The oil change must be carried out after the fi rst 150 hours of work, and then after the following 2000 or 4000<br />
hours of operation, depending on how the gearbox is used and at least once a year. To facilitate the emptying of<br />
the gearbox, we advise that the oil change is carried out while the gearbox is warm, the internal parts must be<br />
washed with suitable liquid before the introduction of new oil. Different oils must not be mixed together; this is<br />
particularly true of mineral and synthetic oils. After the gearbox has been operated, the lubricant level must be<br />
checked periodically and topping off arried out when necessary.<br />
9.4 Oil quantity<br />
The oil quantities required for proper lubrifi cation can be found in page G.239.<br />
SAE<br />
J-306-81<br />
H Y D R A U L I K<br />
VG<br />
ISO<br />
3448<br />
SAE 80W 68<br />
85WSAE90W 150<br />
SAE 220<br />
Viscosity<br />
Operating temperature<br />
Ambient temperature<br />
-20° -10° 0° 10° 20° 30° 40° 50° 60° 70° 80° 90° 100°<br />
Recommended lubricants<br />
producer mineral oil synthetik oil producer mineral oil synthetik oil<br />
AGIP Blasia Blasia S FINA Giran<br />
ARAL Degol BG Degol GS IP Mellana Telesia Oil<br />
BP Energol GR XP Enersyn HTX KLUBER Kluberoil GEM 1 Klubersynt GH6<br />
CASTROL Alpha SP Alpha SN MOBIL Mobilgear SHC<br />
CHEVRON NL Gear OPTIMOL Ultra<br />
DEA Falcon CLP Q8 Goya El Greco<br />
ELF Reductelf SP Elf Syntherma P SHELL Omala EP Tivela Oil<br />
ESSO Spartan Ep Glycolube TOTAL Carter EP<br />
9.5 Temperature<br />
The advised operating temperature of standard gearboxes should be between -15 deg.C. and + 40 deg. C.<br />
Page B. 16<br />
www.jahns-<strong>hydraulik</strong>.de
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