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The Utile Engineering Co. Ltd.

12/10/05

Irthlingborough, Northamptonshire. England
Tel: +44 (0) 1933 650216
Fax: +44 (0) 1933 652738

10

IC191

Maintenance

Fully trained and competent staff must carry out any maintenance work. Utile Engineering offers contract
maintenance services if required contact our service department.
When carrying out any maintenance and inspections always follow the health and safety guidelines on page 4.
A regular correct maintenance plan is essential to good operational reliability and a long service life for your
machine. As operating conditions vary, no exact timings can be specified for wear checks, repairs and inspections,
however the following plan can be used as a guide until time scales to better suit the machines environment are
found.

The machine, ancillaries and surrounding area should be kept as clean as possible.

Ensure all items are properly held and supported during all aspects of maintenance as not to pose a problem for
health and safety. Observe all lifting points and apply care when handling the equipment.

Ensure all machines and associated pipework have cooled down sufficiently before touching and attempting any
maintenance.

Typical tools required for maintenance include: -
Set of spanners

Pipe Wrenches

Circlip Pliers

Set of screwdrivers

Vernier Gauge / Micrometer

Two-leg Pulley drawer

Set of Allen Keys

Hammer / mallet

Feeler Gauges

Typical bolt tightening torques can be seen on page 6.

New gaskets must be fitted every time the machine is dismantled.
Bearings and seals are recommended to be replaced after 15000 operating hours or 2 years whichever is sooner.
Blades must be replaced regardless of wear after 20000 operating hours as failure due to fatigue could cause
serious damage.

After maintenance the machine and equipment must be treated, as new and all pre-commissioning checks should
be made. Install all protective devices and controls properly after completion of work. Ensure all cabling, unions and
guards are correct, secure and in place. Dispose of any used oil and cleaning solutions as prescribed by law.

MAINTENANCE PLAN

DAILY CHECKS

QUARTERLY CHECKS

TASK

CHECK

TASK

CHECK

Check / Fill lubricator reservoir

Check machine for blade wear.

Check Belt condition/Tension (Hourly for
running in period).

Check control panel for wiring, cleanliness and
function of all panel features. (if applicable)

Drain all vessels, condensate traps, outlet
filters manually

Check function of emergency stop button and
local motor isolator. (if applicable)

Clean inlet filters (Daily for 1

st

 week).

Check motors for excessive vibration and
damage.
Check function of pressure gauges.

WEEKLY CHECKS

Check function of non-return valves

Check lubricator drip rate

Check function of pressure relief valves

Check belt condition / tension
Clean inlet filters (After for 1

st

 week).

Run Standby machine for a few minutes.

YEARLY CHECKS

MONTHLY CHECKS

Clean lubricator and oil lines

Check function and operation of all valves.

Check flanges and joints for leaks.

Check differential pressure across filters (clean
and replace if necessary).

Clean internally vessels, condensate traps,
filters (including elements).

Check function and operation of autodrains /
condensate lines.

Inspect machine internally (at least once a
year)

Clean fins on machine and motors

Maintenance

Summary of Contents for LGB32

Page 1: ... Ltd 12 10 05 Irthlingborough Northamptonshire England Tel 44 0 1933 650216 Fax 44 0 1933 652738 1 IC191 Installation Operation Maintenance Instructions Model LGB32 Gas Compressor Serial Number Site Location Installation Date ...

Page 2: ...pment into which the machine has been incorporated and the said equipment declared to be in conformity with the Machinery Directive they must not be put into service Foreword The LGB series rotary gas compressor has been developed based on many years of experience in the compressor and vacuum pump industry Using modern design techniques and production methods coupled with rigorous testing and high...

Page 3: ...k on the displacement principle They provide a constant low pulsation supply of air or gas The machines have a cylindrical bored housing The rotor which is also cylindrical is fitted eccentrically in the cylinder so that a crescent shaped working chamber is formed Movable rotor vanes are fitted in the longitudinal grooves in the rotor centrifugal force and the force of the air or gas presses the b...

Page 4: ...rgency stop buttons and other such devices if fitted are to be checked regularly to ensure that they continue to function correctly and will protect the installation and personnel in the event of an emergency NO attempt should be made to touch the machine whilst it is rotating Particular care is needed when checking rotor clearances Any movement of rotors may trap fingers Most machines certain pip...

Page 5: ...tably within the case The packaging and contents should be received in good condition When unpacking do not remove the inlet outlet protection covers The contents should be inspected against the advice note notify Utile Engineering within 3 days of any items which are damaged or are missing followed by a written claim within seven days of the goods being delivered Storage If the machine is not req...

Page 6: ...e installed in a clean dry well ventilated area Allow adequate space and facilities for service inspection and future expansion A minimum of 0 75m of working space around the machine is recommended Adequate space around the motor and machine particularly any fan inlets is also necessary to facilitate cooling airflow Where several machines are installed in close proximity care must be taken to ensu...

Page 7: ... parallel alignment see fig 5 Place a straight edge across the coupling The hubs will be in correct alignment when the straight edge contacts the 4 points squarely Drive Belts 1 Remove any dirt oil etc from all mating surfaces Place bush in hub and match half holes on both shafts 2 Mount assembly in desired position on shafts ensuring both shafts are parallel and in correct alignment use a straigh...

Page 8: ...ve belts removed 9 Recheck coupling drive alignment and retension see page 7 9 Ensure all equipment is installed and earthed in accordance with current legislation 9 Check all piping connections 9 If the system is to be pressure tested all gauges and pressure switches must be isolated or removed Maximum purge or pressure test is 1 50 times the working pressure 9 Check all protective devices ensuri...

Page 9: ...ched from our works If it found necessary to alter the oil feed then proceed as follows using fig 7 1 Loosen off locking nut 8 from adjusting screw retaining bracket 2 To decrease flow back off external nut 9 towards shoulder of adjusting screw To increase flow tighten external nut 9 onto adjusting screw retaining bracket 3 Tighten locking nut 8 onto adjusting screw retaining bracket Lubricator Ma...

Page 10: ...be replaced after 15000 operating hours or 2 years whichever is sooner Blades must be replaced regardless of wear after 20000 operating hours as failure due to fatigue could cause serious damage After maintenance the machine and equipment must be treated as new and all pre commissioning checks should be made Install all protective devices and controls properly after completion of work Ensure all c...

Page 11: ...perature excessive 4 Warped Sticking blades 4 Replace blades 1 Insufficient lubricant to cylinder 1 Inspect clean oil lines oil holes 2 Incorrect lubricant 2 Use correct lubricant 3 Dirty inlet air gas 3 Clean inspect intake Excessive blade wear 4 Excessive operating temperature 4 See remedies for excessive discharge temperature 1 Worn bearing 1 Replace bearing 2 Excessive blade wear 2 Replace bla...

Page 12: ...ommended but if work has to be carried out on site we advise you most strongly to contact Utile Engineering Service Department for advice During inspection determine if the correct oil is being used Bearings cylinder wall rotor shaft assembly and blades should show a polished surface with a light film of oil Hard baked deposits indicate inferior oil dirt or excessive temperature 3 Reassembly after...

Page 13: ...ear Lightly smear the shaft with oil to assist assembly The correct clearances for these machines are LGB32 Drive End Coverplate Rotor 0 05mm 0 08mm Rear End Coverplate Rotor 0 15mm 0 18mm Rotor Cylinder 0 08mm 0 10mm Reassembly should start with the preparing of the rotor and shaft assembly by the fitting of the replacement seal sleeve if required and the inner races of the both roller bearings 6...

Page 14: ...re refitting oil pipes Prime oil pipes before use 7 Spare Parts A stock of the main wearing parts at the installation site is important to the constant availability and smooth running of the machine We recommend the following parts and quantities to be kept in stock at the installation site Description Part Number Quantity Blade S 8331 4 6 Ball Bearing H 1062 1 Roller Bearing Drive End H 1061 1 Ro...

Page 15: ... BEARING H 1062 1 13 BEARING SEAL DRIVE END F 1073 V 1 14 BEARING SEAL REAR END F 1047 V 1 15 THRUST WASHER B 1057 1 16 MECHANICAL SEAL F 1115 1 17 LOCK NUT B 1073 1 18 TAB WASHER B 1074 1 19 CIRCLIP B 1033 1 20 SOCKET HEAD CAP SCREW G 1121 19 21 DRIVE PIN OIL PUMP E 1018 1 22 DOWEL E 1000 4 23 O RING COVERPLATE F 1208 2 24 O RING END CAP DRIVE END F 1209 1 25 GASKET END CAP REAR END S 8296 1 26 S...

Page 16: ...defect are incurred 2 Malfunction caused by fair wear and tear abnormal conditions of use accident neglect or misuse of equipment or improper storage 3 Deviation from operating specifications or other special terms of sale 4 Improper operation maintenance or repair 5 Damage resulting during shipment or installation by other than company authorised personnel 6 Freight charges for goods returned to ...

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