Ariel JGQ - Page 8

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OF CONTENTS
iv 9/08
Low Oil Pressure Shutdown ..................................................................................4-58
Maintenance ....................................................................................... 5-1
General Introduction ...............................................................................................5-1
Compressor Components ..................................................................................5-3
Positioning a Throw for Maintenance ......................................................................5-3
Connecting Rod ......................................................................................................5-4
Connecting Rod (Crank Pin) Bearing ................................................................5-4
Connecting Rod - Removal ...............................................................................5-6
Connecting Rod Bushing Replacement .............................................................5-7
Connecting Rod - Installation ............................................................................5-8
Crosshead............................................................................................................. 5-11
Crosshead - Removal ......................................................................................5-11
Crosshead - Installation ...................................................................................5-13
Crankshaft .............................................................................................................5-14
Main Bearings - Checking Clearances ............................................................5-14
Crankshaft - Removal ......................................................................................5-17
Oil Slinger - Removal .......................................................................................5-18
Oil Slinger - Installation ....................................................................................5-18
Chain Sprocket - Removal ...............................................................................5-18
Chain Sprocket - Installation ............................................................................5-19
Fan Shaft Assembly Procedure .......................................................................5-19
Main Bearings - Removal and Installation w/Crankshaft Removed .................5-20
Main Bearings - Removal and Installation w/Crankshaft In Place ...................5-21
Crankshaft - Installation ........................................................................................5-22
Chain Drive System ..............................................................................................5-23
Description .......................................................................................................5-23
Chain Adjustment ............................................................................................5-24
Chain and Sprocket Replacement ...................................................................5-24
Chain Idler Sprocket Replacement - (Eccentric Adjustment Cap) ...................5-25
Lube Oil Pump Chain Sprocket Replacement .................................................5-25
Force Feed Lubricator Chain Sprocket Replacement .....................................5-26
Piston and Rod .....................................................................................................5-27
Piston and Rod - Removal ...............................................................................5-27
Piston and Rod Disassembly ...........................................................................5-28
Piston and Rod Reassembly ...........................................................................5-29
Piston and Rod - Installation ............................................................................5-30
Piston Rod Run Out ..............................................................................................5-31
Piston Rings ..........................................................................................................5-32
Determining Ring Wear: ..................................................................................5-32
Removal: .........................................................................................................5-32
Piston Rings - Installation ................................................................................5-32
Wear Bands ..........................................................................................................5-32
Determining Wear Band Wear: ........................................................................5-33
Wear Band - Installation ..................................................................................5-33
Piston Rod Pressure Packing - Removal ..............................................................5-33
Piston Rod Packing - Reassembly ........................................................................5-34
Types of Piston Rod Packing Rings ......................................................................5-35