Replacement Vacuum Pump - Bosch ACS 553 Service Manual

Plumbing and Mechanical

Replacement Vacuum Pump

WARNING: Disconnect the unit from
the power source before beginning
service work. Incorrect use or
connections can cause electrical
shock.
WARNING: Wear safety goggles
when working with refrigerants.
Refrigerants can cause eye injury.
WARNING: Use extreme caution
w h e n d i s c o n n e c t i n g h o s e s .
Pressurized refrigerant may be
present in hoses. Point hoses away
from you and anyone nearby.
Instructions
These instructions outline the steps to replace
the existing vacuum pump. See Figures 4-2
and 4-3.
Removing Vacuum Pump
1. Disconnect unit from the power source.
2. Remove the front plastic cover.
3. Remove the four screws under the control
panel.
4. Tilt the control panel upwards the front of
the unit.
5. Remove the plastic line from the vacuum
pump.
ss01940
Oil fill port
Sight glass
Oil drain port
Figure 4-2. Vacuum Pump
1 689 975 295 2021-04-13
ACS 553, ACS 563 Service Manual
6. Remove the two nuts from isolators threaded
studs that fastening the vacuum pump to the
frame of the unit.
7. Disconnect the vacuum PUMP connector
from the main harness.
8. Remove the cap from the vacuum pump
oil fill port.
9. Remove the vacuum pump from the unit.
Installing Replacement Vacuum Pump
1. Remove the cap from the vacuum pump
oil fill port.
2. Place the vacuum pump in the unit.
3. Slide the horizontal tab of the pump base
through the rectangular hole in the base so
the tab is located under the base frame and
rubber trim.
4. Cam the vacuum pump base downward,
aligning the isolator studs on the base with
the holes on the pump base.
5. Secure the vacuum pump to the isolators
with two nuts.
6. Connect the electrical connector (PUMP)
from the vacuum pump to the main harness.
7. Connect the plastic line.
8. Add 250 ml of oil into the vacuum pump.
9. Place the cap on the fill port.
10. Tilt the control panel down and secure with
four screws.
11. Reinstall the front plastic cover.
12. Perform the steps to start the pump.
13. While the vacuum pump is running, check
the correct fill level through the sight glass.
14. Perform a function test and check for leaks.
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Robert Bosch GmbH