STEYR MOTORS Marine Engine 2012 Series, Service Manual

Page: 84 / 274

Engine
19/87 Z001138-1_2013-02-01
01.00.05Timing adjustment procedure for dismantled engine
Function description:
Time control of injection and valves are consistent
due to the special camshaft design (3 cams per
cylinder). During adjustment, pay attention to
essential functional elements, such as unit injector,
timing belt tension and sense of rotation of engine,
in order to achieve the required setting accuracy of
injection. A change of the timing belt tension or the
sense of rotation during adjustment always causes
wrong positioning of the injection control. For this
reason it is to be ensured that the adjusting
procedure follows the conditions of real operation.
Status for job:

Disassemble fan drive
(refer 05.05.02)

Camshaft housing cover dismantled.

Set up crankshaft to approx. 40° crank
angle before TDC (piston; cylinder 1; in
TDC) in order to set all pistons in the
engine to approximately the same length of
stroke, thus providing open space for the valve
movement (stroke). This ensures that the
camshaft may be turned to the
desired position
(injection stroke - unit injector cylinder 1)
without problems.

Crankshaft position with dismantled
vibration damper.

Crankshaft position with mounted damper,
if timing belt has not been removed.
NOTE:
Before disassembly, mark the vibration
damper, with locked crankshaft. A corresponding
marking must be made on the timing belt cover.

Unit injectors mounted and adjusted.
Refer 03.02.02 and 03.02.06.

Valve clearance set.
Special tool.:
dial gauge rail 2306031/6
dial gauge digital 2300899/0
probe pin 2300641/1
V-belt tightener VR00515/0
open end wrench 2300711/0
extractor VR00113/0
adjust gage eccentric shaft
2300736/1, offset box wrench
VR00228-0
40°