MMD Equipment 185S-5C2 part 2 - Manual (Page 19)

6. Maintenance
6-3
6.2 Troubleshooting
Should any trouble occur during operation, do not leave it. Investigate the cause and take appro-
priate 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 prob-
lem 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 cut solenoid.
(3) No fuel.
Disassemble, clean, and
change
Check fuse
Change solenoid
Check connector
Replenish fuel
※ Engine does not reach its
maximum speed.
(1) Improper length in speed
regulator rod.
(2) Orifice clogging.
(3) Faulty speed regulator.
(4) Engine trouble.
(5) Fuel filter clogging.
(6) Water accumulated in sedimentor
(7) Air filter element clogging.
Re-adjust
Disassemble/Clean
Disassemble/Check
Call your nearest dealer
Disassemble/Change
Drain water
Clean element or change
Revolution drops before
discharge air pressure
reaches 100psi(6.9bar).or
discharge air pressure does
not reach 100psi(6.9bar)
(1) Pressure regulator insufficient
adjustment.
(2) Trouble of pressure regulator.
Re-adjust (Fasten)
Change
Engine does not reach
minimum speed at unload.
(1) Improper length in speed
regulator rod.
(2) Faulty speed regulator.
Re-adjust
Disassemble/Check
Safety valve
relieves at unload.
(1) Pressure regulator insufficient
adjustment.
(2) Faulty speed regulator
(3) Unloader damaged
(4) Faulty safety valve.
(5) Improper length of speed
regulator rod
Re-adjust (loosen)
Disassemble/Check
Disassemble/Check
Change
Re-adjust (elongate)
Oil mixes in Air.
(Poor oil separation)
(1) Scavenging orifice strainer
clogging.
(2) Excessive oil in tank.
(3) Low discharge pressure.
(4) Oil separator deteriorated.
Disassemble/Clean
Drain to its proper level
Disassemble/pressure
Control valve/check
Disassemble/Change
Insufficient free air deliv-
ery.
(1) Air filter element clogging.
(2) Unloader valve cannot fully
open.
(3) Engine does not reach its
maximum speed.
(4) Air leak
Clean element or change
Call your nearest dealer
See above※
Check air leak from piping