Farmall 90 Manual page 71

5. Tighten the cylinder head fixing screws in the
sequence shown in Figure 138.
-- Tightening sequence for cylinder head
bolts:
st
- 1 stage of tightening with a torque
wrench:
M 12 x 1.75 x 70 bolt:
(ref. 3--6--11--14)
M 12 x 1.75 x 140 bolt:
(ref. 1--2--7--8--9--10--
15--16--17--18)
M 12 x 1.75 x 180 bolt:
(ref. 4--5--12--13)
nd
- 2 stage tightening to an angle of 90°
for all the screws
rd
- 3 stage additional tightening to an
angle of 90° for 140 and 180 mm (5.5118 and
7.0866 in) long bolts only.
A = fan side
6. Adjust the clearance between the rocker arms
and valves using an Allen wrench (1), box
wrench (2) and feeler gauge (3).
The working clearance is given on page 10.
7. Move the cylinder to the exhaust stroke and mea-
sure the clearance; the valves in the cylinder are
closed, whilst those on the symmetrical cylinder
are rocking.
The symmetrical cylinders are 1 -- 4 and 3 -- 2.
-- FIRING ORDER 1 -- 3 -- 4 -- 2
Balance valves
of cylinder no.
Adjust valve clear-
ance of cylinder no.
SECTION 10 - - ENGINE - - CHAPTER 1
50 N⋅m ± 5 N⋅m
(37 ± 4 ft-lbs)
40 N⋅m ± 5 N⋅m
(30 ± 4 ft-lbs)
70 N⋅m ± 5 N⋅m
(52 ± 4 ft-lbs)
1 3 4 2
4 2 1 3
MIF1014A
MIF1015A
MIF1016A
71
137
138
139