FOR MODELS: JGW,JGR AND JGJ TABLE OF CONTENTS
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Chain and Sprocket Replacement ................................................................ 5 - 14
Eccentric Vernier - Chain Idler Sprocket Replacement (Self-Align Sprocket) 5 - 14
Lube Oil Pump Chain Sprocket Replacement............................................... 5 - 15
Force Feed Lubricator Chain Sprocket Replacement ................................... 5 - 16
Piston and Rod - Removal.................................................................................. 5 - 18
Piston and Rod - Disassembly and Reassembly................................................ 5 - 19
Disassembly.................................................................................................. 5 - 19
Reassembly .................................................................................................. 5 - 20
Piston and Rod - Installation............................................................................... 5 - 21
Piston Rod Run Out............................................................................................ 5 - 22
Piston Rings ....................................................................................................... 5 - 23
Determining Ring Wear:................................................................................ 5 - 24
Removal:....................................................................................................... 5 - 24
Wear Bands........................................................................................................ 5 - 24
Determining Wear Band Wear: ..................................................................... 5 - 24
Piston Rings - Installation ................................................................................... 5 - 24
Wear Band - Installation ..................................................................................... 5 - 24
Piston Rod Pressure Packing - Removal ........................................................... 5 - 24
Piston Rod Packing - Reassembly ..................................................................... 5 - 25
Types of Piston Rod Packing Rings ................................................................... 5 - 27
Type "P" Pressure Breaker ........................................................................... 5 - 27
Type "BTR" Single Acting Seal Set............................................................... 5 - 28
Type "BD" Double Acting Seal Set................................................................ 5 - 29
Type "3RWS" Oil Wiper Set .......................................................................... 5 - 30
Type “AL” Double Acting Seal Set ................................................................ 5 - 31
Typical Arrangement of Piston Rod Packing Rings............................................ 5 - 31
Piston Rod Packing Ring Material ...................................................................... 5 - 32
Valves................................................................................................................. 5 - 32
Valves - Removal .......................................................................................... 5 - 32
Valves - Maintenance.................................................................................... 5 - 33
Valves - Reassembly .................................................................................... 5 - 33
Bolt Tightening for Valve Caps........................................................................... 5 - 34
VVCP - Variable Volume Clearance Pocket Head End Unloader ...................... 5 - 36
Removal ........................................................................................................ 5 - 36
Disassembly.................................................................................................. 5 - 36
Maintenance.................................................................................................. 5 - 37
Adjustment .................................................................................................... 5 - 37
Water-Cooled Compressor Rod Packing ........................................................... 5 - 39
Re-assembly ................................................................................................. 5 - 39
Testing .......................................................................................................... 5 - 39
Ethylene Glycol Contamination .......................................................................... 5 - 40
Cleaning Non-Lube Compressor Cylinder Components .................................... 5 - 40
Technical Assistance .......................................................................... 6 - 1
Recommended Maintenance Intervals ................................................................. 6 - 1
Daily ................................................................................................................ 6 - 1
Monthly (in addition to Daily Requirements) ................................................... 6 - 2
Every 6 Months or 4,000 Hours (plus Daily/Monthly)...................................... 6 - 2
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