ACS 653, ACS 663 Service Manual
SP00D00624 2021-04-08Robert Bosch GmbH
93
Plumbing and Mechanical
These instructions outline the steps to replace
the injection manifold. See Figures 4-3 through
4-5. If an injection block is being repaired,
refer to Repairing or Replacing a Solenoid
or Replacing a Check Valve on the following
pages, as applicable, once the block is removed.
When installing hoses, solenoid(s), or check
valve, replace the O-rings and use thread
sealant where necessary.
1. Clear service hoses and remove them.
2. Disconnect unit from the power source.
3. Remove the front plastic cover.
4. Open the service rear door.
5. Remove the rear cover (above the service
door) by pushing it up and extract it by
pulling it out.
6. Disconnect all hoses from the injection
manifold.
7. Disconnect the wires from the injection
manifold solenoids.
8. Remove the two screws securing the
injection manifold to the unit.
9. Remove the injection manifold from the unit.
1. Install the injection manifold and secure with
two screws.
2. Connect all hoses to the injection manifold.
3. Connect the wires to the injection manifold
solenoids.
4. Insert the rear cover so that the 4 holes on
the sides the cover t into the 4 clips on the
machine. Push down to hook the rear cover.
5. Close the service rear door.
6. Reinstall the plastic frontal cover.
7. Attach the outside high- (red) and low-side
(blue) service hoses. Tighten at 7.9 Nm
torque.
8. Connect the unit to the power source,
perform a function test, and check for leaks.
High and Low
Service Hose Ports
Bottle Hose
Connections
POE Solenoid
(S14)
PAG Solenoid
(S2)
Dye
Solenoid (S15)
Contaminant recovery
outlet port
(for ACS 663 only)
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