7
24. Slide ball bearing (31) on power rotor (22) shaft.
NOTE: If oven is available, ball bearing (31) can be heated to approximately 200 degrees F for ease of
installation on power rotor (22) shaft.
25. Thread nut (32) on power rotor (22) shaft and tighten. As nut (32) is tightened onto power rotor, it will
push ball bearing (31) and outer spacer (30) into proper position on power rotor shaft.
NOTE: To prevent power rotor shaft from rotating when nut (32) is tightened, hold rotor with a spanner
wrench fastened to the rotor’s key slot. Remove any burrs from key slot after nut (32) is
installed.
26. Thread nut (33) on power rotor (22) shaft. Install set screws (75) in nut (33) to lock nut in place.
27. Install assembled power rotor (22) into pump, ensuring that each part is centered as it enters inboard
cover (13) and is properly seated. Ensure that the gasket (65) is seated evenly in the inboard cover (13).
28. Install bearing retainer (34) using bolts (35) and lockwashers (36). Tighten bolts (35) to a torque value of
95 lbs. ft. (± 5 lbs. ft.)
29. Install key (54), coupling hub, and coupling nut (55). Tighten setscrew (56).
30. Install coupling spacer.
PUMP DISASSEMBLY
Due to size and weight of individual parts of the pump, it is recommended that a crane and/or block and
tackle be available when complete disassembly of pump is required.
1. Close inlet and outlet valves. Vent pressure from pump and drain pump prior to disconnecting inlet and
outlet piping. Remove plugs (19) to drain pump fluid from inlet end. Fluid in the outlet end of pump can be
pumped to inlet chamber by rotating pump power rotor counterclockwise. Remove bleed tube (53) by
loosening elbow connections (52).
NOTE: 8L-462 series pumps incorporate highly finished precision parts which must be handled carefully
to avoid damage to critical machined surfaces. Parts should be tagged for identification and exact
position so that all parts are properly installed during assembly.
2. Remove coupling spacer. Disconnect inlet and outlet flanges. Remove pump from bedplate.
WARNING
Approximate weight of pump is 2490 pounds.
3. Install an eyebolt in ¾ - inch tapped bore in cover (50). (Weight of cover (50) is approximately 135
pounds.) Support weight of cover using installed eyebolt, and remove capscrews (51) and cover (50).
Remove O-ring (12) from groove of cover (50).
4. Remove plate (48) by loosening and removing capscrews (61) and spacers (88).
5. Remove oil balance tubes (81) from housing (5). Remove O-rings (82) from oil balance tubes.
6. Slide two idler balance piston housings (44) from end of idler rotors (41).
Summary of Contents for GLH8L-462 Series
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