CONTENTS

1 PRECAUTIONS IN SAFETY.....1-1
1.1 SYMBOLS RELATED TO SAFETY ....1-1
1.2 LABELS FOR SAFETY .......1-2
1.3 SAFETY PRECAUTIONS .......1-3
1.4 DEFINITION OF TERMS .......1-6
2 DISASSEMBLY AND REASSEMBLY..2-1
2.1 DISASSEMBLY..........2-1
2.1.1 Cover ...........2-3
2.1.2 Bowl ...........2-5
2.1.3 Horizontal shaft .......2-16
2.1.4 Water supplying device....2-22
2.1.5 Vertical shaft ........2-25
2.1.6 Gear pump.........2-29
2.2 REASSEMBLY..........2-32
2.2.1 Bowl ...........2-34
2.2.2 Vertical shaft ........2-37
2.2.3 Water supplying device....2-38
2.2.4 Horizontal shaft .......2-38
2.2.5 Reassembly of trap.....2-40
2.2.6 Gear pump.........2-41
3 MAINTENANCE INSPECTION PROCEDURES...........3-1
3.1 ROUTINE CHECKS ........3-1
3.2 LUBRICANT REPLACEMENT INTERVALS.3-2
3.3 INSTRUCTIONS FOR USE OF SYNTHESIZED LUBRICANT....3-3
3.4 EXPENDABLE PARTS REPLACEMENT INTERVALS......3-5
3.5 BOWL OPENING INTERVALS (GUIDELINES)............3-7
3.6 OVERHAUL (GUIDELINES) ......3-7
4 MAINTENANCE INSPECTION PROCEDURES FOR MAJOR PARTS..4-1
4.1 BEARING REPLACEMENT INTERVALS ..4-1
4.2 BOWL .............4-1
4.2.1 Corrosion of bowl......4-1
4.2.2 Corrective steps for corrosion .4-2
4.2.3 Disc ...........4-3
4.2.4 Bowl body .........4-4
4.2.5 Bowl hood.........4-5
4.2.6 Main seal ring .......4-5
4.2.7 Distributor .........4-6
4.2.8 Various types of O rings of bowl............4-6
4.2.9 Main cylinder ........4-7
4.2.10 Pilot valve assembly.....4-7
4.3 VERTICAL SHAFT SYSTEM......4-8
4.3.1 Vertical shaft ........4-8
4.3.2 Upper springs .......4-8
4.3.3 Lower bearing block .....4-9
4.3.4 Flat spring.........4-9
4.3.5 Steel ball .........4-9
4.3.6 Lower spring........4-9
4.3.7 Height of vertical shaft ....4-10
4.3.8 Installed height of flat spring (adjustment of spacer) ....4-10
4.4 HORIZONTAL SHAFT SYSTEM ....4-11
4.4.1 Spiral gear .........4-11
4.4.2 Horizontal shaft.......4-11
4.4.3 Collar ...........4-11
4.4.4 Friction block ........4-12
4.4.5 Friction pulley .......4-12
4.5 GEAR PUMP ..........4-12
SELFJECTOR Instruction Manual Maintenance Manual
4.5.1 Safety joint .........4-12
4.5.2 Drive gear, driven gear and bush .........4-12
4.5.3 Valve stem.........4-12
4.6 LUBRICANT ...........4-13
4.7 BRAKE EQUIPMENT ........4-13
4.8 WATER SUPPLYING DEVICE.....4-13
4.9 INSPECTION OF MULTI-MONITOR FOR FUNCTION.........4-14
4.9.1 Leakage Monitor (LM)....4-14
4.9.2 Discharge Detector (DD) ...4-14
4.9.3 Water Detector (WD) .....4-14
5 PERIODIC INSPECTION CHART...5-1
6 CAUSES OF TROUBLES AND CORRECTIVE STEPS.....6-1
6.1 ALARMS ............6-1
6.1.1 Types of alarms .......6-1
6.1.2 Alarm indications ......6-2
6.1.3 Processing sequence after occurrence of alarm ...6-3
6.1.4 Self-diagnostic fnction of detectors ........6-4
6.2 OCCURRENCE OF OIL LEAKAGE....6-5
6.2.1 Check the flow rates of valve closing operating water and sealing water. ...........6-5
6.2.2 Checks to perform by disassembling bowl....6-6
6.2.3 Checks to perform by disassembling water supplying device ...........6-6
6.2.4 Other ...........6-6
6.3 OCCURRENCE OF ABNORMAL VIBRATION......6-8