Iran Tractor ITM 470, Operators Instruction Book

Page: 77 / 122

4
Maintenance and adjustment
70
4. Change the engine oil filter.
5. Refill the sump with an approved oil,
so that the oil level is between the MIN
and MAX marks on the dipstick.
NOTE
Run the engine to circulate the oil and
check for leakage. Time must then be
allowed for the oil to settle in the sump
before rechecking the level. Top up if
necessary.
Engine oil filter (Fig. 17)
Change the engine oil filter every
250 hours.
The illustration of the filter element
shows a typical installation with a verti-
cal filter. In some applications the filter
may be horizontal, the change procedure
is identical.
1. Put a drain pan under the filter to re-
tain spilt oil.
2. Remove the filter canister (1) with a
strap wrench or similar tool and dis-
card the canister.
3. Clean the filter head (3).
4. Smear a few drops of clean engine oil
on the sealing ring (2).
5. Fit the new canister and tighten by
hand only. DO NOT use a strap wrench.
6. To fill the oil filter with oil, ensure
that there is oil in the sump. Turn the
engine over with the starter motor and
pull the stop control out until the oil
pressure warning goes out.
Fig. 17:
3
2
1
NOTE
Run the engine to circulate the oil and
check for leakage. Time must then be
allowed for the oil to settle in the sump
before rechecking the level. Top up if
necessary.
Valve tip clearances (Fig. 18)
Check the valve tip clearances eve-
ry 1000 hours.
The valve tip clearance is set between
the top of the tappet and the rocker lever.
The correct clearances (engine cold)
are:
Three cylinder naturally aspirated engines:
0,30 mm (0.012 in) inlet and exhaust.
Three cylinder turbocharged engines:
0,20 mm (0.008 in) inlet
0,32 mm (0.013 in) exhaust.
Fig. 18: