MTZ 1220.1/1220.3 K. Scheduled technical maintenance
K28
Operation 34. Check bearings of FDA
reducer kingpin axles
Check and if necessary adjust the bear-
ings (7) of the axles (5, 14) as described
in the section “Adjustments”
Operation 34а. Replace filter
drain.
(if installed as an options instead of fan
heater)
Replacement shall be carried out
once per year after 800 hours of opera-
tion.
ATTENTION: for replacement of the
filter drain, contact a special service sta-
tion. Replace only using special equip-
ment.
After every 1,000 service hours
Perform the operations of the previous MS and the following ones:
Operation 35. Tighten engine cylinder
head fastening bolts
Check tightening of the fastening bolts of
the cylinder heads on a hot engine pro-
ceeding as follows:
• Remove the caps and covers of the cy-
linder heads.
• Remove the rocker shafts with the
rockers and poles.
• Using a torque spanner, tighten all
the bolts fastening the heads to a torque
of (210+/-10) N•m in the sequence shown
in the figure on the right (in succession the
figure shows).
Note: Before tightening the bolts, loo-
sen them by 1/6 turn.
• Install the rocker shafts to places and
adjust the clearances between the
rockers and the valves (See Operation
21 of this Manual).
• Install the covers and caps of the cy-
linder heads to place.
ATTENTION! Perform the first check of
bolt torque of the cylinder heads after
running in the tractor.
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