PRONAR T669XL, Operator'S Manual, Page: 124 / 135

Pronar T669XL, Pronar T700XL SECTION 5
5.38
FREQUENCY MAINTENANCE ACTIVITIES
Check the condition of the suspension springs (item 1): carefully clean
and brush the sides of the suspension springs in order to confirm that
there are no cracks.
Once a year
If there is a clearance between suspension springs and the axle, check
the complete fixing system: bolts (item 2), guiding and clamping plates
of the suspension spring bolts.
When checking technical condition of the suspension system, pay attention to degree of wear
of individual parts and looseness of system components and confirm that all components are
complete and free from cracks and deformations. If any of the suspension system
components is damaged or excessively worn, immediately stop operating the trailer and
replace or repair the damaged element.
5.8 CONSUMABLES
5.8.1 HYDRAULIC OIL
Always adhere to the principle that the oil in the trailer hydraulic system and in the tractor
hydraulic system are of the same type. In the event of application of different types of oil
make certain that both hydraulic substances may be mixed together. Application of different
oil types may cause damage to trailer or tractor. In a new machine, the hydraulic system is
filled with L HL32 Lotos hydraulic oil.
TABLE 5.7 L-HL 32 Lotos hydraulic oil characteristics
ITEM NAME UNIT VALUE
1 ISO 3448VG viscosity classification - 32
2 Kinematic viscosity at 40°C mm
2
/s 28.8 – 35.2
3 ISO 6743/99 quality classification - HL
4 DIN 51502 quality classification - HL
5 Flash-point C 230
In the event of necessity of changing hydraulic oil for another oil, check the recommendations
of the oil Manufacturer very carefully. If it is recommended to flush the system with the
appropriate preparation, then comply with these recommendations. Attention should be