Belarus 1221.2, Operator'S Manual

Page: 253 / 295

BELARUS-1221.2/1221V.2/1221.3 Scheduled maintenance
252
After every 250 service hours
Perform the previous MS and the following
operations:
Operations 13, 14. Clean the centrifugal
oil filters of the engine and GB.
• Remove the nut (1) and cap (2).
• Insert the screwdriver (5) or a rod
between the filter casing and the rotor
bottom to prevent rotation of the rotor
(3), and turning the rotor nut with the key
(4) remove the carrier of the rotor (3).
• Remove the cover (6), the impeller (7)
and filter mesh (5) of the rotor. As
necessary, clean and rinse the mesh.
• Using a non-metallic scraper, remove
deposits from the inner walls of the rotor
carrier.
• Clean all parts, rinse them in diesel fuel
and blow with compressed air.
• Assemble the filter, performing the
disassembling operations in the reverse
order. Before assembling the carrier with
the rotor housing, lubricate the O-ring with
motor oil.
• Align the balance marks on the carrier
and the rotor housing. Screw the carrier
fastening nut with a small force until the
carrier fully lands on the rotor.
• The rotor must rotate freely without
jamming.
• Install the cap (2) and tighten the nut (1)
to a torque of 35 to 50 N•m.
Note: After the engine stops, a noise of
rotating rotor must be heard for 30 to 60
seconds. This indicates that the filter is
working properly.