New Holland LS140 Workshop Manual page 108

15. N843 engine:
A dial indicator reading of 3.895 - 4.655 mm
(0.1533" - 0.1833") indicates injection timing
between 21° - 23° and no further adjustment is
necessary.
N843H engine:
A dial indicator reading of 3.539 - 4.267 mm
(0.1393" - 0.1680") indicates injection timing
between 20° - 22° and no further adjustment is
necessary.
To change injection timing by one degree
requires changing shim thickness by 0.01 mm
(0.004"). Adding shims retards timing while
removing shims advances timing.
Piston Position in Relation to Crankshaft
Angle
Crankshaft Angle
(BTDC)
13°
14°
15°
16°
17°
18°
19°
20°
21°
22°
23°
24°
25°
26°
SECTION 10 - ENGINE
Position
1.510 mm (0.0594")
1.749 mm (0.0689")
2.005 mm (0.0789")
2.278 mm (0.0897")
2.569 mm (0.1011")
2.875 mm (0.1132")
3.199 mm (0.1259")
3.539 mm (0.1393")
3.895 mm (0.1533")
4.267 mm (0.1680")
4.655 mm (0.1833")
5.058 mm (0.1991")
5.477 mm (0.2156")
5.912 mm (0.2328")
10-73
16. Recheck pump timing after adjusting shim
thickness.
17. Reassemble the delivery valve, spring and
holder. Torque to 39 - 44 N⋅m (29 - 33 ft. lbs.).
18. Reassemble the valve train. After installing the
rocker shaft assembly, adjust valve lash.
Valve Tappets
Coat the valve tappets with oil, then insert into their
bores.
NOTE: Ensure used tappets are returned to the bore
from which they were removed. Excessive cam and
tappet wear will result if used tappets are run against
a different cam lobe.
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