MMD Equipment 185S-6C2 - Manual (Page 55)

6. Maintenance
6-4
6.3 Troubleshooting
 Should any trouble occur during operation, do not leave it. Investigate the cause and take
appropriate measures.
 Read the manual carefully and fully understand what to do in case of trouble.
 The better you understand the construction and function of the unit, the faster you can find a
problem and solution.
 This chapter describes the state, cause and countermeasures of important troubles in detail:
Symptom Cause Countermeasures
Low starter revolution
speed.
(1) Battery malfunction. Check battery→
Charge, change
Starter rotates but engine
does not start.
(1) Fuel filter clogging.
(2) Malfunction of fuel stop solenoid.
(3) No fuel.
Disassemble, clean, and
change
Check fuse
Change solenoid
Check connector
Replenish fuel
Discharge air pressure does
not reach 100psi(6.9bar).
(1) Pressure regulator insufficient
adjustment.
(2) Pressure regulator trouble.
Re-adjust (fasten)
Change
Engine does not reach its
maximum speed.
(1) Improper length in speed
regulator rod.
(2) Unloader orifice clogging.
(3) Malfunction speed regulator.
(4) Engine trouble.
(5) Fuel filter clogging.
(6) Water is accumulated in
sedimenter.
(7) Air filter element clogging.
Re-adjust
Disassemble/Clean
Disassemble/Check
Call your nearest dealer
Disassemble/Change
Drain water
Clean or change of element
Revolution drops before
discharge air pressure
reaches 100psi(6.9bar).
(1) Pressure regulator insufficient
adjustment.
(2) Trouble of pressure regulator.
(3) Unloader orifice clogging.
Re-adjust (fasten)
Change
Disassemble/Check
Engine does not reach
minimum revolution at
unload.
(1) Improper length in speed
regulator rod.
(2) Malfunction speed regulator.
Re-adjust
Disassemble/Check
Safety valve relieves at
unload.
(1) Pressure regulator insufficient
adjustment.
(2) Speed regulator diaphragm
damaged.
(3) Unloader valve damaged･Faulty
seat
(4) Faulty safety valve.
(5) Improper length of speed
regulator rod
Re-adjust (loosen)
Change
Change
Change
Re-adjust (elongate)
Oil mixes in air.
(poor oil separation)
(1) Scavenging orifice strainer
clogging.
(2) Excessive oil in receiver tank.
(3) Low discharge pressure.
(4) Oil separator deteriorated.
Disassemble/Clean
Drain to its proper level
Disassemble and check of
pressure control valve
Check /Change
Insufficient free air
delivery.
(1) Air filter element clogging.
(2) Unloader valve cannot fully
open.
(3) Engine does not reach rated
speed.
Clean or change of element
Call your nearest dealer
Call your nearest dealer