WORKSHOP MANUAL - lombardini service

Disassembly / Reassembly
4
Pump/injector unit - Disassembly
When the removal (but not replacement) of a unit injector is
required the following procedure may be used to avoid the need for
other adjustments:
Rotate the crankshaft until the unit injector cam lobe 2 forces the
cam follower 1 to the highest position, then insert a suitable sized
(hardened) pin into the hole 3 and rotate the crankshaft until the
cam follower 1 is at the lowest position. In this way the injection
advance regulator 4 remains calibrated.
50
Note: If you dismount more than one pump/injector unit, make
sure to reinstall them in the appropriate housing (with
relative drive rod 5); before mounting lubricate the drive rod
at its two ends with MOLYSLIP, AS COMPOUND 40 type.
Rocker arm assembly
Remove the nuts attaching the rocker arm assembly to the cylinder
head.
When refitting tighten the nuts at a torque of 40 Nm.
The pin, that is hollow inside to allow lubrication, is closed at its
ends by two caps.
Note: The rocker arm assembly may be removed without removal
of the unit injectors.
51
Rocker arm pivot, dismounting and remounting
To remove pivot 1 from the support 2 it's necessary to drill out pin 3
using a 4mm drill bit.
On remounting insert a new pin and reinsert it in bearing surface A
(0 to 1 mm).
Check the rod’s state of wear and tear (diam. B) and that of the
rocker arm holes (diam. C).
Remove the closing caps 4 at the end and carefully clean inside.
Dimensions (mm):
52 53
mm
C-B
C-B
limit value
A 0 ÷ 1,00
B 17,989 ÷ 18,000
C 18,015 ÷ 18,030
0,015
÷ 0,041 0,090
FOCS Workshop Manual_cod. 1.5302.858_1° ed_ rev. 00
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