
8
D4 0617GB
December 2000
D4 11 © IMO AB
S5
• Remove the screws 451 and washers 451A.
• Carefully loosen the front cover 501 from the
pump body 401 with a plastic mallet.
• Remove the front cover 501 and rotor set in
one move.
• Remove the shaft seal bellows unit S5 and
the seal ring S4.
E.
F.
ATTENTION
Protect the face of S4.
S4
451A
451
401
501
Fig. 10
Fig. 9
D4 13 IMO AB
202
D4 14 © IMO AB
• Separate the front cover 501 and the power
rotor 102.
• Inspect the rotors, balancing bushes 376 and
O-ring 506 by separating them.
G.
H.
ATTENTION
Be careful not to make scratches in the
surfaces of the balancing piston bore.
506
501
102
Fig. 12
Fig. 11
376
102
202
202
D4 12 © IMO AB