Yanmar 3JH4E Service Manual page 61

TROUBLE AND TROUBLESHOOTING
(I-1) Add fuel oil and prime.
(I-2) Bleed air.
(I-3) Remove water from drain and fuel oil system and prime.
(I-4) Check and make necessary repairs.
(I-5) Clean.
(I-6) Replace.
(I-7) Check and make necessary repairs.
(I) Fuel oil supply cut off
(1) Insufficient oil in fuel oil tank
(2) Air in fuel oil system and fuel injection pump
(1) Loose lube oil pressure adjustment valve
(2) Clogging of lube oil filter
(III) Emergency stoppage device in operation
(III-1) Tighten adjustment valve.
(III-2) Clean.
(III-3) Tighten safety valve.
(III-4) Remove and repair or replace.
(III-5) Return to original condition.
(II-1) Replace.
(II-2) Clean carefully to insure good working order.
(3) Water in fuel oil tank
(4) Fuel oil cock closed
(5) Clogging of fuel oil filter
(6) Damage in fuel oil system
(7) Problem with fuel feeding pump
(3) Leakage from lube oil safety valve
(4) Trouble with lube oil pump
(5) Relay operation triggered by low lube
oil pressure
(IV) Miscellaneous
(IV-1) Remove and repair or replace.
(IV-2)
THE ENGINE SUDDENLY STOPS.
(II) Governor trouble
(1) Damage to governor spring
(2) Sticking of governor sleeve
(1) Seizure of moving parts
(2) Overloading due to insufficient
cooling water
Disassemble and clean cooling water pump and check cooling
water system.
Chart 1
THE ENGINE
SUDDENLY STOPS.