Sperre HV2/210, Instruction Manual

Page: 6 / 21

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