Tuthill GlobalGear GG250 Guide

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Maintenance Training Module 2
GlobalGear®with Cartridge Mechanical Seals

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Topics in Maintenance Module 2
•Reassembly of Drive Module
•Reinstall Drive Module
•Adjusting End Clearance
•Mechanical Seal Installation
•Relief Valve Disassembly & Relief Valve
Troubleshooting
•Servicing High Temperature Greased Bearing Units
•Replacing Bushings
•Lubrication Notes

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•Reinstall the rotor into
the bracket
Reassembly of the Drive Module

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•Pick up external ball
bearing
Reassembly of the Drive Module

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•Reinstall bearing into
bearing carrier
Reassembly of the Drive Module

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•Reinstall inner bearing
cap using fasteners
Reassembly of the Drive Module

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•Move cartridge
mechanical seal into
position
•Have flush ports in
correct orientation
•Very loosely tighten
gland nuts
Reassembly of the Drive Module

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•Reinstall bearing
carrier
Reassembly of the Drive Module

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•Push rotor all the way
in the bracket
Reassembly of the Drive Module

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•Insert lock washer with
tabs
•If there is a bearing
spacer, bearing spacer
goes on first
Reassembly of the Drive Module

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•Install locknut
Reassembly of the Drive Module

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Reassembly of the Drive Module
Locknut Torque Requirements
Nut Size Pump Size Newton-Meters
N-05 GG15-30 68 - 95
N-07 GG120-210 136 – 176
N-08 GG250 163 – 203
KM-12 GG550 163- 203

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•Bend over tab of lock
washer into slot on
locknut
Reassembly of the Drive Module

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•Check and make sure
that the gasket is in the
correct position for
flush
•Center of three holes
at flush opening is
correct
Reinstall Drive Module

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•Gasket must align to
allow flow through
internal flush drilling
size GG250 & smaller
•NPT plug indicates
internal flush path at
this location
Reinstall Drive Module

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Reinstall Drive Module
Position Drive Module Over Foot and Near Housing

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Reinstall Drive Module
Push Drive Module into Housing

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Reinstall Drive Module
Fasten Bolts Connecting Bracket to Housing

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Reinstall Drive Module
Fasten Bolts Connecting Bearing Carrier to Foot

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•End clearance is
distance between the
rotor/idler end and the
closest surface on the
cover
Adjusting End Clearance