Test Oil Supply Unit; Pressure Control Valve For High And Low Pressure; Test Oil Tank; Cooling The Test Oil - Bosch EPS 610 Original Instructions Manual

3.5.8

Test oil supply unit

3
2
Fig. 8: Test oil supply unit
1 Test oil pump
2 Motor
3 Oil tank
The test oil supply unit consists of a test oil
pump (Fig. 8, Pos. 1) driven by an electric motor
(Fig. 8, Pos. 2). This unit supplies test oil to the fuel
injection pump under test.
A flexible coupling connects the test oil pump and the
motor. The frame supports the test oil supply unit.
!
Ensure that the motor is powered on only in the
specified direction. The direction is indicated on the
motor.
3.5.9 Pressure control valve for high and
low pressure
The pressure control valve is used for controlling the
pressure of the test oil fed into the fuel injection pump
under test. When the hand knob (Fig. 1, Pos. 12) is
turned counterclockwise to the extreme position, the
high pressure test oil (upto 4 Mpa) can be tapped from
the pressure line connection. When the threaded spin-
dle is turned clockwise, the high pressure oil bleeds
off. Low pressure oil can be tapped at the pressure line
connection.
The pressure can be adjusted between rotating the
hand knob. The pressure ranges are as follows:
R
For phasing - 0 - 4 Mpa
R
For calibration - 0 - 400 Kpa
Bosch Limited
Product description | EPS 610 | 11
3.6

Test oil tank

The test oil tank, mounted on the frame of the EPS 610,
has a capacity of 50 lts.
open the rear bottom panel.
i
Ensure that the test oil tank is always filled to its
capacity.
A test oil heater is provided for heating the test oil.
To measure the test oil temperature, a temperature
probe is provided. An oil level sensor is provided to pre-
vent dry running of the tandem pump.
During calibration, the test oil is routed back from the
fuel injection pump to the test oil tank.
3.6.1

Cooling the test oil

1
1
Fig. 9: Connections for cooling water
1 Inlet and outlet for cooling water
The test oil is cooled by a heat exchanger. The test oil
flows through the cooling pipes and dissipates heat to
the cooling water.
The test oil temperature is measured by the tempera-
ture sensors and is controlled by the cooling water sup-
plied to the heat exchanger. The supply of cooling water
is controlled by the logic board through solenoid valves.
i
See chapter 10 for details on requirements for cool-
ing water.
To access the test oil tank,
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F 002 DG9 918 2017-10-16
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