Sperre HV2/210, Instruction Manual

Instruction manual for Water-cooled Air Compressor  HV2/210                                 - 5 -

4. FAULT TRACING

The following are some of the faults that may arise in operation.

A.   Compressor capacity is low and/or compressor
not supplying full pressure.

Possible cause

Remedy

Dirty, damaged or

Clean and check all valves.

worn valves

Replace defective parts.

Sticking piston rings

Dismantle rings.

Clean grooves and rings.
Replace defecive parts.
When reinstalling,
lubricate cylinder walls
with oil.

Leaking safety valves

Overhaul safety valves,

adjust to correct
lifting pressure.

Defective gasket 

Replace gasket.

between crankcase
and sylinder block

Air filter blocked

Clean filter.

B.   LP safety valve blows.

Possible cause

Remedy

HP valves damaged 

Check and clean valves.

or dirty

Replace defective parts.

C.   HP safety valve blows.

Possible cause

Remedy

Air line shut-off 

Open shut-off cock.

cock closed.

Non-return valve

Remove and clean

blocked

non-return valve.

Replace defective parts.

D.   Valves require maintenance too frequently.

Possible cause

Remedy

Overheating

Check cooling water

circulation and temp.
Inspect coolers and
clean if necessary.

Dirty intake air

Check suction filter.

Inferior lube oil

Change the lube oil type.

See list of
recommended types in
this handbook.
Manufactorer can
supply further
information.

Incorrect tightening of

Tighten valve

compressor valves

to specified torque.

clamping screws
to specified torque.

E.   Overheating or knocking in crankcase.

Possible cause

Remedy

Defective bearings

Inspect bearings, check

clearances.

Insufficent lube oil or

Drain sump, clean and add

lube oil contaminated

new oil.

with water

Binding crankshaft

Check bearing clearances.

bearing

Replace defective parts.

F.   Overheating and scoring of piston

.

Possible cause

Remedy

Piston or gudgeon pin

Replace defective

bearing incorrectly

parts, check piston

fitted

clearances, piston ring
clearances and
gudgeon pin bearing.

Deficient cooling

Check cooling

water circulation
and temperatures.

G.  Excessive lube oil consumption

.

Possible causes

Remedy

Piston rings worn out

Replace piston rings.

Defective crankcase

Replace breather valve.

breather valve