IMO CIRCOR GLH8L-400 Series, Instruction Manual And Parts List

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11. Thread nut (33) on power rotor (22) shaft. Tighten nut to good engineering practices
(Critical torque is applied to setscrews (75)). Install set screws (75) in nut (33) and
tighten set screws to 12 + 2 lbs. ft. (Size 400: 80 + 5 lbs. in.)
12. Install assembled power rotor into the pump, ensuring that each part is centered as it
enters the inboard cover (13) and is properly seated. Ensure that the gasket (65) is
seated evenly in the inboard cover (13).
13. Install bearing retainer (34) using bolts (35) and lockwashers (36). Tighten bolts (35) to
a torque value of 95 + 5 lbs. ft. (Size 400: same as size 462)
14. Install key (54), coupling hub, and coupling nut (55). Tighten setscrew (56).
15. Install coupling spacer.
PUMP DISASSEMBLY
CAUTION ATTENTION
The 8L series pumps incorporate highly finished precision parts that must be handled carefully
to avoid damage to critical machined surfaces. The parts removed should be tagged for
identification and their exact positions in the pump carefully noted so that the new parts, or the
same parts, are properly replaced without damage.
NOTE
Because of the size and weight of the individual parts, we recommend removing the pump from
its baseplate to a location equipped with a crane when a full disassembly is required.
1. Complete mechanical seal disassembly (Steps 1-18).
2. Remove power rotor (22) from the pump (Approximate weight: Size 400: 117 lbs., Size
462: 166 lbs.)
3. Install a 3/4"-10 eyebolt (2) into the tapped hole on the inboard cover (13). Connect a
lifting hook to the eyebolt for support of the cover. (Approximate weigh: Size 400: 231
lbs., Size 462: 330 lbs.)
4. Remove inboard cover capscrews (21) and lockwashers (20).
5. Install ½”-13 jacking bolts in the jacking bolt holes on the inboard cover (13) and evenly
torque to separate the inboard cover from the pump case.
6. Using a soft face mallet, tap the inboard cover (13) to loosen it from the case and
remove. Set inboard cover (13) on a work bench and remove balance piston
bushing/idler stop assembly. Remove capscrew (18), idler stop (16), and balance piston
bushing (15).
7. Remove O-ring (4) from the cover and O- ring (12) from pump case.
8. Remove stop pin plug (11) with O-ring (10). Insert 3/8-16 inch bolt in threaded hole of
stop pin (009) and remove.
9. Remove strainer (92) from the discharge housing (3).