Secondary Pump

Removal and Installation, Disassembly and Assembly of Secondary Pump





Tightening torques
Hex. socket Screws - 8 Nm
Nut for axial holder - 8 Nm

Removal And Installation





1 Unscrew nut for axial holder (44).
2 Unscrew hex. socket screws (45) and remove secondary pump (20).

Installation Note





Tighten hex. socket screws (45) and nut for axial holder (44) to 8 Nm. The slot (arrow) in axial holder (43) must be horizontal.Install intermediate plate (21) and O-ring (22).

Disassembly And Assembly





1 Take pump wheels (22) and (23) from pump housing (20).

Installation Note
Lubricate pump wheels (22) and (23) and insert into pump housing (20). Rotate driving pump wheel (22) in such a manner that the drivers are entering into grooves (arrow).





2 Remove locking ring (28) and cover (27).





3 Remove shutoff piston (21) together with compression spring (24), spring plate (25) and ball (26) from pump housing (20).

Installation Note





Check 0-ring (29) and teflon rings shutoff piston (30) and (31) for damage and replace, if necessary. Place 0-ring (29) into pump housing. Insert teflon rings (30) and (31) into shutoff piston (21).