5/7
NT 1005-C00 09 18 Pump AF TM H e
SHAFT SEAL
Operation
MONOSIR block
601
is held in shaft by its rubber face.
Stationary seal
604
is held in pump body by ring
605
. Tight
sealing depends on :
• ring
605
and rubber face of
601
.
• sealing faces being perfectly flat and mirror smooth, of
stationary seal
604
and
601
.
Disassembly
After opened the pump :
• remove screws
706
and washers
721
, cap
705
, outer seal
707
and drive out retainer
701
with shaft, bearing and all
parts contituting the shaft seal.
• remove snap ring
704
, drive out shaft from bearing by tap-
ping on shaft end and remove the set
701
-
731
-
733
-
703
.
• remove the set
604
-
605
, then all MONOSIR block
601
.
MONOSIR block
601
must not be dissociated.
Reassembly
• Check rings
707
,
605
and rubber faces of block
601
.
• Check that sealing faces of
604
and block
601
are flat and
mirror smooth.
• Replace all parts on shaft in the reverse order and install
snap ring
704.
• Replace on the pump shaft, ball beaing and shaft seal
making sure one of the drain vents is turned downwards.
• Then, install seal
707
taking care not to damage seal
707
on key-groove, bearing cap
705
(bearing grease nipple
turned upwards), screws
706
and washers
721
.
