Mitsubishi S4E - TROUBLESHOOTING CHART (2)

TROUBLESHOOT ING
Poor fue l supply to f u. 1
in j ection p um p
Greater v ariance. of injection
quantity
Insufficien t injection quantity
Exces si y e: inje c ti on q ua ntity
15 4
TROUBLESHOOTING C HART (2)
Po ssi b le c ause
Closed fuel tank supply cock
No fu.l
in tank
logged fu.llin es
Air in f uel sy>tem
Clogged f ue l reed pum p in le t
stra i ner
Defecti ve fue l feed pump
Leaky fu~ l l i nes. or connecHon s.
Clogge d f uel filter
Air in fue l system
Jammed plung.rs
Jammed tappets
Wom pl u nge"
Wo rn tappet c ams
Worn bearings
Worn or broken ph.lllger spr i ngs
Loo ~ e plunger pinio ns
Defective de li very valves
Worn Or broken de l n1e ry vnlve
springs
Governor stop l ever link is
binding,
Control rack is sticky.
Jammed plungers
Jammed tappels
Worn pl ungerS
Worn tappet. cams
Worn bearings
Loose pl unge r pin i ons
Improper full·load setti ng of
governor
Stop Jever j ammed in " incr e ase"
position.
Improper fuU· load selling of
g ov ern or
Loose plungeJ pinlon~
R emedv
Op en the cock .
Fill f ue l tank.
Repair or d ean fuel pipes whh air.
Ret i ghten connect i ons or re p la ce
f uel pipes.
Re move an d cl ean str ai ner .
Re pa ir .
Ret i gh ten CO n nectiO ns .
Di sa ssemble an d cle~n filter.
Bleed air out of fuel s ys1em
Replace plunger s.
Replace tappets.
Rep l,ce plungers.
Repl
ace "PP " C3m, .
Rep l ac.e be a rings.,
Replace plunger springs.
Rem,,"iJ
pr operly by malChlng
marks .
Rep l Clce valves .
Repla ce \'a l ve Spl lng .
Straighten li nk, pl.cing
l eve r in ne u tr al position .
Relubricate
Or repair .
Replace plunge".
Re pJ ace tappets.
Replace plungers .
Replace la ppet cams.
Rep l ace hearmgs
Reinstall
properly by ma t ching
m ar ks,
Ad j ust governor s etting on
bench.
Repai r lever link, placi ng l ev er
In neutral pO SitIOn .
Adjust governor selting on bench.
Retnstall
properly by matching
marks.