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9LD Workshop Manual _ cod. 1.5302.286 - 3° ed_rev. 02
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Fuel system
How to reassemble injection pump components
After replacing the worn-out components, reassemble the pump as
follows:
-Introduce sector gears into the pump body by making reference points
C match with the B points on the rack.
-Fix barrels with the eccentric screws F on the pump body.
-Fit valves with seats, springs, fillers and delivery unions tightening
them at 35 ÷ 40 Nm.
-Fit plungers by making reference points E match with the sector gear
D points.
-Fix retainers and springs; lock tappet with special stop.
-Check that both plungers have the same delivery by performing the
necessary measurements at the test bed; if delivery is not the same
set screw F.
Tighten screws at 25 Nm.
Check that rack rod slides smoothly: if not, the engine may fail to start or
hunt.
How to mount injection pump on the engine
During reassembly, make sure the adjustment rod pin 1 is correctly
inserted into the opposite seat in the adjustment lever.
 See “Injection advance adjustment” on page 63 for the choice of the
seals 2.
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