8
7. Remove idler rotors (41) from bores of rotor housing (5) by rotating idlers. Rotate power rotor (22) to
remove idler rotors (40) from rotor housings (3 and 5). Use extreme caution to avoid dropping idler rotors
as they emerge from housing (5).
8. Loosen setscrew (56) and remove coupling hub nut (55). Remove coupling hub and key (54) from power
rotor (22) shaft.
9. Remove bolts (35), lockwashers (36) and bearing retainer (34) from inboard cover (13).
10. Grasp power rotor (22) shaft and pull assembled power rotor from pump.
CAUTION
Assembled power rotor weighs approximately 175 pounds and should be supported by
slings during removal from pump.
NOTE: Removal of power rotor (22) will also remove check nut (32), check nut (33), set screws (75),
inner spacer (29), outer spacer (30), ball bearings (31), spiral ring (28), seat adapter (63), gasket
(65), mechanical seal (27), seal sleeve (26), O-ring (69 or 25), balance piston (24), and O-ring
(23).
11. For disassembly of power rotor (22), support power rotor in soft lined jaws of a bench vice. Use extreme
caution in handling power rotor (22) to avoid damage to machined surface. Avoid dropping of any parts as
power rotor is disassembled.
12. Loosen setscrews (75) and remove check nut (33) and check nut (32). Using a bearing puller, remove
ball bearing (31).
13. Perform procedures outlined in steps 11 through 16 of Maintenance: Servicing Mechanical Seal and/or
Ball Bearings.
14. Remove balance piston (24). Remove O-ring (23) from groove of power rotor (22) shaft.
15. Install an eyebolt in ¾ - inch tapped bore in inlet head (37) to aid in support during removal. (Weight of
inlet head is approximately 275 pounds.) Remove capscrews (21), lockwashers (20) and inlet head (37)
from pump case (1). Remove O-ring (12) from groove of case (1).
16. Install an eyebolt in ¾ - inch tapped bore in inboard cover (13) to aid in support during removal.
(Approximate weight of assembled inboard cover is 385 pounds.) Remove capscrews (21) and
lockwashers (20). Install two ½ inch bolts (approx. 3-½” long) into jacking holes on inboard cover (13)
flange face. Thread bolts into jacking holes until the inboard cover is forced from the case bore. Removal
of inboard cover (13) also removes O-ring (4), balance piston bushing (15), idler stop (16), and
capscrews (18).
17. Remove O-ring (12) from groove of case (1). Remove O-ring (4), capscrews (18), idler stop (16) and
balance piston bushing (15) from inboard cover (13).
18. Remove stop pin plug (11) with O-ring (10) from case (1). Insert a 3/8-16 inch bolt into threaded bore of
stop pin (9) and remove stop pin (9).
19. Install ¾ inch eyebolts into tapped holes at end face of rotor housings (3 & 5) and pull housings from
case.
CAUTION
Support housings (3 & 5) by slings as they are removed from the case. Each housing
weighs approximately 350 pounds.
20. Remove O-rings (4), vent pins (8) and oil balance tube (87) from each of the rotor housings (3 & 5).
Remove O-rings (82) from oil balance tube.
Summary of Contents for GLH8L-462 Series
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