ABB Mechanism HMB-8 Instructions Manual Download | Manualshive

Page: 18 / 34

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4 November 2005

641P026-008
HMB-8 / HMB-8.7 Mechanism

©

(formerly HMB-11)

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9

Troubleshooting

Although the HMB mechanism is a low-maintenance design,
problems can arise if commissioning and maintenance
procedures are not followed. Table 4 lists problems, causes,
and remedies that could occur when commissioning and
operating the HMB-8 mechanism

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Summary of Contents for Mechanism HMB-8

Page 1: ...uctions for the HMB 8 HMB 8 7 formerly HMB 11 Mechanism 641P026 008 ABB ABB Inc Westmoreland Distribution Park East 100 Distribution Circle Mount Pleasant PA 15666 www abb com www abbhvsg com Copyright 2005 ...

Page 2: ......

Page 3: ... Close Pilot Valves 11 4 3 5 Evacuating the Mechanism 11 4 3 6 Refilling the Mechanism with Oil 12 4 3 6 1 Topping Off a Mechanism with Hydraulic Oil 12 4 3 6 2 Refilling a Mechanism that Has Been Drained 12 4 3 7 Replacing the Pump Motor 13 4 3 8 Leak Checking the Hydraulic System 13 4 3 9 Spring Travel Limit Switch Settings 14 4 3 10 Checking the Pump Start Counter 14 5 Manual Operation 14 6 Adj...

Page 4: ...ty for damages resulting from any incorrect operation or wrong handling of our equipment even if these instructions contain no specific indication in this respect We stress the fact that only genuine spare parts should be used for replacements Notice 4 This publication is a copyrighted work Therefore it is not permissible to disclose reprint copy or reproduce any part of these instructions without...

Page 5: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 5 4 November 2005 ...

Page 6: ...halves Onboard auxiliary switches 97604 Figures 1 and 1b are included that are pre adjusted and fully wired to waterproof wiring connectors 97606 Fig 1b on the mechanism body The integrated design affords a compact unit that is essen tially maintenance free By virtue of its integrated design the hydraulic spring drive has a minimal amount of high pressure hydraulic connections and no piping connec...

Page 7: ...ilot valve s 51005 Fig 2 the changeover valve 51006 moves to the orientation shown in the OPEN position illustration of Figure 2 High pressure hydraulic oil flows from the back side of the drive piston 51012 and is released into the low pressure reservoir 97605 Fig 1 The constantly present high pressure oil on the front side of the drive piston propels the piston into the OPEN position 3 3 Over Pr...

Page 8: ...8 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 8 Filter Oil gauge glass Oil drain valve closed Oil unit Vacuum pump Pressure release lever Overflow valve open Low pressure connector Illustration1 Filling the Operating Mechanism ...

Page 9: ... hand by pressing the hand plungers of the pilot valves Figure 8 The circuit breaker may be operated only if the disc spring assembly is charged 4 1 4 Slow Switching Operations This manual does not contain instructions for slow switching operations which are never to be performed when the breaker is in service If however slow switching operations are necessary they should be done only by trained p...

Page 10: ...g 1 and Plate 1 with the spring assembly fully compressed and the breaker in the CLOSED or OPEN position The oil level should be no less than 1 3 of the total window for a horizontally oriented mechanism Plate 1 or 1 4 of the total window for a vertically oriented mechanism Plate 2 The oil level can be distinguished by its red color If the oil level is low hydraulic oil needs to be added as descri...

Page 11: ...er trans portation especially for mechansisms not shipped on a circuit breaker Important After any maintenance that could allow even small amounts of air to enter the hydraulic sys tem evacuatetheairandrefillthesystemwithoil Slow opening or closing times during mecha nism timing tests or excessive or erratic pump up time of the hydraulic system may indicate the presence of air in the hydraulic sys...

Page 12: ...ve the cap from the oil fill port 51127 Plate 3 4 Add clean filtered hydraulic oil as specified in section 4 3 6 into the oil fill port until the oil level is between 1 4 to 1 2 of the window for vertically oriented mecha nisms or 1 3 to 1 2 of the window for horizontally oriented mechanisms The oil level can be distin guished by its red color against a metallic background Important Hydraulic oil ...

Page 13: ...the set screw 4 Install the new pump motor onto the cover 51023 5 Position the small bevel gear on the new pump motor shaft so that there is small amount of play between the small bevel gear and the large bevel gear 51019 through the entire rotation of the large bevel gear Important Be sure that the small bevel gear and large bevel gear do not mesh too tightly to prevent damage to the gears 6 Appl...

Page 14: ...g gas density To operate the mechanism manually 1 Remove the mechanism cover to access the pilot valves 51004 and 51005 Figs 1 and 8 2 Forcefully and quickly press and release the black button on the respective open or close pilot valve Important When operating the mechanism manually the black button on the pilot valve must be pushed forcefully and quickly and then re leased Do not press the butto...

Page 15: ... Equalize the hydraulic pressure as described in sec tion 4 1 1 2 Loosen the locking nut of the respective throttle open or close 3 Turn the throttle counter clockwise to increase the speed turn the throttle clockwise to decrease the speed Never turn the throttle more than one turn without re verifying the speed through timing tests 7 Adjusting the Onboard Auxiliary Switches The auxiliary switches...

Page 16: ...the oil drain valve and the high pressure connector screw coupling with integrated non return valve shall be removed Important Keep any dirt or debris away from the open end of the hoses and the connecting plugs of the pump 3 The suction side of the hand emergency pump marked by S shall be connected to the oil drain valve with the low pressure hose 4 The high pressure hose shall be connected to th...

Page 17: ... formerly HMB 11 Page 17 4 November 2005 Illustration2 Hand Emergency Pump Low pressure hose High pressure hose Operating lever S P Hand emergency pump S suction connector P high pressure connector High pressure connector Oil drain valve ...

Page 18: ... e h t n r u T l i o c e v i t c e f e D l i o c e h t e c a l p e R g n i k r o w t o n h c t i w s y r a i l i x u A d n a m m o c e h t n o s s a p o t h c t i w s e h t t s u j d a e R l i o n i t r i D l i o l l a t s n i e r d n a r e t l i f e v o m e R e v i r d n i n o i s o r r o C r o f t c e n n o c s i D r e t a e h n o i t a s n e d n o c i t n a n e p o t c e n n o c s i d e h t e s...

Page 19: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 19 4 November 2005 NOTES ...

Page 20: ...6 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 20 51107 51107 51036 97612 51153 51122 97605 51002 51037 51013 51008 51004 51150 97604 51038 51033 51127 51005 97603 51028 51031 View A End View View B Side View 51276 97608 ...

Page 21: ...icator 51036 Oil Level Indicator 51037 Throttle Valve Close 51038 Position Indicator Cover 51107 High Pressure Block 51122 Mounting Flange 51127 Oil Fill Port 51150 Heater 51153 Solenoid Valve Block 51276 Coupling 97603 Throttle Valve Open 97604 Auxiliary Switches 97605 Low Pressure Reservoir 97608 Adjustable Auxiliary Link 97612 Spring Travel Limit Switch Assembly Figure 1 HMB 8 Hydraulic Operati...

Page 22: ...97606 51122 97604 51028 51031 97611 Oil Level View Window 97609 51033 51276 View B Side View View A End View 97608 ...

Page 23: ...51031 End Casting 51033 Position Indicator 51122 Mounting Flange 51276 Coupling 97604 Auxiliary Switches 97606 Wiring Connectors 97608 Adjustable Auxiliary Link 97609 Auxiliary Drive Block 97611 Spring Charge Indicator Figure 1b HMB 8 Hydraulic Operating Mechanism External Views Weight is 1 030 lbs ...

Page 24: ...045 Pressure Relief Valve not shown 51046 Pump Limit Switch and Cam Assembly not shown 51068 O Ring 26 58 x 3 53 mm not shown 51122 Mounting Flange 51276 Coupling not shown 51002 Pump Motor not shown 51004 Pilot Valve Close 51005 Pilot Valve Open 51006 Changeover Valve 51007 Accumulator Piston 51008 Disc Spring Assembly 51012 Drive Piston 51013 Oil Drain Valve not shown 51122 51007 51008 51012 510...

Page 25: ... 2005 51002 Pump Motor 51004 Pilot Valve Close 51005 Pilot Valve Open 51006 Changeover Valve 51045 Pressure Relief Valve 51107 High Pressure Block 97612 Spring Travel Limit Switch Assembly Figure 3 HMB 4 Position OPEN 51045 97612 51107 51005 51004 51006 51107 51107 51002 ...

Page 26: ...imit Switch and Cam Assembly 51047 Switch Assembly Figure 4 Mechanical Switch Pump ON OFF O C O Alarm O C O Block C O Alarm C O Block O Alarm Trip Block 1 Trip Block 2 Optional Switch Additions Cam Gear Rack Primary Switches Spring Pack Discharge Motion END VIEW SIDE VIEW 51047 51046 51046 ...

Page 27: ... 51015 Eccentric Shaft 51018 Small Bevel Gear 51019 Large Bevel Gear 51023 Cover 51059 Check Valve integrated into pump body 51078 O Ring 51079 Filter 51094 Shaft Seal 51115 Hexagon Head Cap Screw 51177 O Ring 12 37 x 2 62 mm 51207 Carbon Brushes 51002 51014 51079 Pump Housing 51207 51115 51018 51019 51094 51023 51078 51015 51059 51177 ...

Page 28: ...ment of Spring Tension 51007 Accumulator Piston 51008 Disc Spring Assembly 51063 Loading Ring 51107 High Pressure Cylinder 97615 Barrel Seal Assembly 97616 Closure Assembly 97617 Bearing 97618 Seals 51063 51008 51107 OIL PRESSURE 51007 Spring Charge Position Measurement 97618 97617 97616 97615 ...

Page 29: ... 29 4 November 2005 Figure 7 Bottom Side of Working Piston 51008 Disc Spring Assembly 51012 Drive Piston 51071 Turcon Glyd Ring 51072 O Ring 51083 O Ring 51084 Supporting Tube 51087 Main Seal 51088 Damping Ring 51012 51008 51084 51072 51083 51087 51071 51088 ...

Page 30: ... Pilot Valve Open 51006 Changeover Valve Figure 8 Pilot Valve Assembly Trip Coil Trip Coil Close Coil High Pressure Access 51006 Moving Piston Trip Speed Adjust Close Speed Adjust END VIEW SIDE VIEW TOP VIEW MECHANISM BODY 51005 51005 51004 Barrel Seal Assembly Location of Hand Plunger for manual operation ...

Page 31: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 31 4 November 2005 Figure 9 Low Pressure Interlock Assembly 51016 51016 Spring Clip for deactivating the Close Position Interlock ...

Page 32: ...4 November 2005 641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 32 Figure 10 Auxiliary Switch Drive Arm 51271 Drive Lever 97609 Auxiliary Drive Block 51271 97609 ...

Page 33: ...641P026 008 HMB 8 HMB 8 7 Mechanism formerly HMB 11 Page 33 4 November 2005 NOTES ...

Page 34: ...ABB ABBInc Westmoreland Distribution Park East 100 Distribution Circle Mount Pleasant PA 15666 Tel 724 696 1500 Fax 724 696 1502 www abb com www abbhvsg com ...

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