1 689 988 262 2017-12-26| Robert Bosch GmbH
44 | EPS 625 | Product descriptionen
3.5.2 Drive
12
3
4
458868_88Nkv
Fig. 2: Drive
1 Coupling guard
2 Flywheel
3 18.5 kW motor
4 T-slot
Ensure that the coupling guard is in place
before starting the drive.
The ISO drive coupling is a safety compo-
nent of the EPS 625. The ISO drive coupling
may only be repaired only by Bosch service
technicians.
The drive system consists of a motor (Fig.2,Pos.3),
flywheel (Fig.2,Pos.2) and coupling. The clamping po-
sition for small injection pumps can be altered with the
additional intermediate flange (special accessory).
i The flywheel is directly mounted on the motor shaft.
The scale on the flywheel is used to set the "start of
delivery" position of the cylinders in a multi-cylinder
fuel injection pump.
i The cam on the fuel injection pump camshaft moves
the piston of the barrel and valve assembly upwards
via the roller tappet. The "start of delivery" position
is attained when the piston closes the inlet bore.
i The axis of the flywheel is set at 125 +/- 0.1 mm from
the top of the pump mounting bed.
The drive motor is mounted on the test pump mount-
ing bed. The angle of rotation sensor (Fig. 3, Pos. 2)
is fitted on a mount (Fig. 3, Pos. 3) on the back of the
drive motor. The mount is attached to the clamping rail
for the injection pumps. The angle of rotation sensor
is used to set the start of delivery of in-line injection
pumps.
458877_60Nkv
Fig. 3: Drive motor with angle of rotation sensor
1 Coupling for angle of rotation sensor
2 Angle of rotation sensor
3 Mount
The complete test pump mounting bed assembly is
mounted on the frame. During calibration, the drive
coupling is connected to the coupling of the fuel injec-
tion pump. The drive coupling is covered with a cou-
pling guard (Fig.2,Pos.1).
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