Yanmar 2YM15 - Page 73

3. Troubleshooting
53
TROUBLE AND TROUBLESHOOTING
Cause and Effect
Countermeasure
(IV-1) Replace.
(IV-2) Clean.
(IV-3) Replenish oil and check. Replace bellofrom.
(IV-4) Repair link system.
(V-1) Replace.
(V-2) Replace.
(V-3) Adjust lube oil adjustment valve.
(V-4) Change oil.
(VI-1) Check and repair.
(VI-2) Disassemble and clean.
(VI-3) Replace.
(VI-4) Repair or replace.
Countermeasure
TROUBLE WITH MARINE GEAR
Chart 4
(I-1) Disassemble and clean.
(I-2) Repair or replace.
(I-3) Repair or replace.
(I-4) Replace.
(I-5) Repair.
(I-6) Adjust.
(II-1) Review (I-1, I-11).
(II-2) Reduce load.
(II-3) Replace.
(II-4) Check oil level and adjust.
(II-5) Check water level and adjust.
(II-6) Change oil.
(II-7) Review manual.
(I-7) Replace.
(I-8) Replace.
(I-9) Adjust to correct position.
(I-10) Reassemble.
(I-11) Check for oil leakage
and replenish.
(III -1) Replace.
(III -2) Replace.
(III -3) Eliminate dangerous rotation.
(IV) Difficulty changing into forward, neutral, and reverse
(V) Dragging
(2) Foreign material
in pipe system
(3) Lube oil pressure
is too high
(4) Viscosity of lube
oil is too high
(2) Damaged holding
spring of pipe
(1) Not enough warp
in steel plate
(3) Oil leakage where there
is remote control
(7) Worn sliding parts of
forward/reverse conversion valve
(8) Damaged O-ring,
V-ring in oil pressure pipe
(9) Low speed valve handle slips
TROUBLE WITH
MARINE GEAR
(6) Incorrect positioning of
forward/reverse conversion valve
(I) Low clutch oil pressure (clutch slips)
(1) Cogging of filter
on suction side
(2) Worn oil pump
(3) Sticking of oil pressure
adjustment valve
(4) Damage or old oil pressure
adjustment valve spring
(1) Damaged holding
spring of pipe
(4) Phase slippage
(5) Damaged seal ring
(10) Poor assembly of low
speed valve handle
(11) Insufficient oil
(II) Overheating
(1) Clutch slippage due
to low oil pressure
(2) Clutch slippage due
to overloading
(3) Damaged bearing
(5) Problem with
oil cooler
(6) Poor quality or
inappropriate oil
(7) Poor operation of
low speed valve
(4) Too much oil
(III) Abnormal noise
(2) Damaged bearing
(1) Excessive backlash
of gear
(3) Abnormal vibration
(1) Oil leakage
(2) Clogged lube
oil filter
(3) Damaged or old lube oil
adjustment valve spring
(4) Sticking of lube oil
adjustment valve
(VI) Abnormal lube oil pressure