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192
193
KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_
Instrument connection
Place the instrument 1, se.no. 7104-1460-127 at least 20 cm
above the pump/injector level.
Connect pipe A (outlet from every instrument test piece) with
pipe A (inlet of every pump/injector) and pipe B (return to the
instrument) with pipe B (outlet from the pump/injector).
Open tap 2 and 3 of each pipe and fill the instrument with diesel.
Start the engine and bring it to 1500 rpm idle running.
Close the fuel supply to the engine from the instrument's tank
using lever 4 and after 1 minute observe the levels in the test
piece.
If a level goes down more than the others it is necessary to
decrease the delivery of the corresponding pump (see below)
and vice versa to increase the delivery if the level increases.
Injection pumps delivery balancing
In case the balancing error read on the test pieces is greater
than 2 cm³/min, then injection pumps deliveries should be
adjusted.
Plate 4 and rod 3 are blocked by screws 1 and 2. Loosen them.
Move plate 4 rightwards with respect to rod 3 if you want to
increase delivery.
If moved leftwards delivery decreases. Make very small
movements with the plate.
Tighten screws 1 and 2 at a torque of 1,1 Nm.
Important
Each time a pump/injector is replaced it is necessary to
balance the deliveries.
10
Fuel system
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