Belarus 80.1 Operation Manual page 317

6.4.5.4 Operation 51. Change of oil in HLL tank
Note – The operation shall be performed on tractors with canopy frame or canopy
base on the basis of small cabin.
Before oil change, heat up the oil in the HLL to reach the normal operating tempera-
ture by starting the engine and setting any of the levers of hydraulic outlet control to the
"Uplift" position and keeping the lever in such position until the hydraulic system is heated.
To change oil in hydraulic system of RLL, do the following:
- put the tractor on a flat ground, raise the RLL links to their top position, brake the
tractor using the parking brake. The engine shall be stopped;
- unscrew the plug of oil filler opening 3 (Figure 6.4.41) and drain plug 5; drain the
oil from the oil tank into a special container for used oil;
- re-place drain plug 5 and fill the system with fresh oil up to the mark "П" on oil level
indicator 2. When using machines that require large oil extraction, fill oil to the level of up-
per mark "С".
- re-place the plug of oil filler opening 3.
1 – oil tank; 2 – oil indicator; 3 – plug of oil filler opening; 4 – HLL pump; 5 – drain
plug.
Figure 6.4.41 – Change of oil in RLL hydraulic system
ATTENTION: THE OPERATION OF OIL CHANGE IN HLL SHALL BE PER-
FORMED ONLY WITH RETRACTED RODS OF HYDRAULIC CYLINDERS OF HLL AND
OF MACHINES COUPLED WITH THE TRACTOR!
WARNING: BE CAREFUL TO AVOID CONTACT WITH HOT OIL!
6.4.5.5 Operation 52. Change of oil in transmission
Before changing the oil, warm up the transmission to reach the normal operating
temperature, by means of driving the tractor.
To change oil in transmission, do the following:
- put the tractor on a flat horizontal surface. The engine shall be stopped. Engage
the parking brake and block the wheels against spontaneous movement with wheel chocks
at the front and back;
- unscrew drain plug 1 (Figure 6.4.42) from rear axle body and drain plug 2 from
gearbox body; drain oil into a special container for used oil; in case the tractor is equipped
with a creeper (hydraulic creeper), then also unscrew check plug 3 located on the left side
of GB body;
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80-0000010B OM