PUMP DISASSEMBLY
1. Remove tubing (54) from inboard and outboard end of pump. Tag each tube to identify installed location.
2. Loosen setscrew (61) and remove checknut (46), coupling hub and key (44).
3. Remove seal cover (63), cap screws (9), and gasket (5). Note: Mechanical seal stationary seat will be
removed with seal cover (63). Remove stationary seal seat with O-ring from seal cover (63)
4. Loosen setscrews on mechanical seal (64) rotating assembly and slide assembly from shaft. Make sure
setscrews are backed off enough so they will not score the shaft as assembly is removed.
If only seal replacement is to be done, disassembly is complete. Refer to assembly procedures steps 10
through 13 to reassemble seal.
If major repair is to be done proceed below.
5. Remove capscrews (9) cover (3) and gasket (5) from outboard side of pump.
6. Remove capscrews (59) from each cover (2). Remove covers (2) and o-rings (6).
7. Remove capscrews (20), washers (21), shims (18) and cover (19) from outboard bracket (12).
8. Remove both outboard and inboard brackets (12) from rotor housings (11 by removing cap screws (16)
along with nuts (68) and lock washers (15) from each bracket.
9. If bushings (45) are to be replaced, remove spring pins (17) and slide bushings (45) from brackets (12).
10. Remove idlers (40,41) from rotor housings (11) by grasping inboard and outboard ends of idlers (40, 41)
and pulling and rotating each idler. Slide power rotor (34) from rotor housings (11).
11. Remove both housings (11) from pump case (1) by removing cap screws and washers ((13) and (15).
12. If thrust collar (42) is to be replaced, remove setscrew (43) from collar (42) and remove collar (42) from
power rotor (34).
PUMP ASSEMBLY
Note:
Clean and inspect all parts before assembly. Replace all worn or damaged parts. It is recommended
that gaskets and mechanical seal be replaced regardless of their condition. Wipe each part with light
lubricating oil just before installing. Rotate power rotor (34) frequently during assembly to ensure
freedom of rotation.
1. Install inboard and outboard rotor housings (11) in case (1) using capscrews (13) and washers (15). Align
housing (11) rotor bores such that the idler rotor bores are parallel to the pump case feet. Torque
capscrews (13) to value on assembly drawing.
2. If collar (42) was removed from power rotor (34), Install collar (42) on power rotor (34) and lock in position
using set screw (43). Ensure collar (42) is installed next to step cut of power rotor (34). Stake setscrew
(43) to collar (42) threads using a center punch to prevent loosening.
3. If bushings (45) were removed, slide bushing (45) onto each bracket (12). Using pinhole in brackets (12)
as a pilot, drill a 3/8 inch hole through bushing (45). Remove all drill burrs and install spring pin (17). DO
NOT allow spring pin (17) to extend into bushing (45) bore.
4
Summary of Contents for IMO G323FHF Series
Page 9: ......
