Chevrolet 70 Series 1970, Service Manual

Page: 398 / 841

53 AND 71 SERIES DIESEL ENGINES 6C-1
SECTION 6C
53 AND 71 SERIES DIESEL ENGINES
T his group is divided into two sec tio n s covering 53 S e r ie s and 71
S e r ie s D ie s e l engines resp e c tiv e ly . The 6V-53 S e r ie s engines a re used
in HV, JV, and TV 70 tru ck s. “ D ie s e l Engine Application Chart" on
page 434 show s 71 S e r ie s engine u sage in 90 S e r ie s tru ck s. R efer to
Index fo r m ajor d ivision s of each sectio n .
Section P age No.
6V -53 D ie s e l Engines ............................................................................... 6C-1
71 S e r ie s D ie s e l E n g in e s ........................................................................... 6C-16
D ia g n o sis and Troubleshooting (53 and 71 S e r i e s ) .......................... 6C-49
6 V -5 3 DIESEL ENGINES
Contents of this se ctio n a re liste d in Index below:
Subject P age No.
Engine Maintenance ............................................................ ... .................. 6C-1
Engine Tune-up O perations ....................................................................6C-2
6V -53 D ie s e l Engine Tune-up C h a r t .....................................................6C-8
Engine R eplacem ent (6V -53 D ie s e l E n g i n e ) ......................................6C-9
In -V eh icle Component R e p l a c e m e n t .....................................................6C-10
Engine Lubrication (6V-53 D ie s e l E n g in e ) ......................................... 6C-15
Torque Wrench S p e c i f i c a t i o n s ................................................................6C-15
ENGINE MAINTENANCE
SERVICING AIR CLEANERS
R egular s e r v ic in g of the engine a ir clea n ers
is one of the m ost im portant m aintenance ite m s.
N eg lect of th is s e r v ic e not only affects fuel econ­
om y, but the perform ance and life of the engine.
IMPORTANT: IN DUST STORM AREAS, AIR
CLEANERS MUST BE SERVICED IMMEDIATELY
AFTER SUCH STORMS OCCUR.
WARNING
USE E X T R E M E CAUTION TO BE
SURE A LL V O L A T IL E C L E A N IN G F L U ID
(GASOLINE, KEROSENE, ETC.) IS RE­
M OVED FRO M AIR C LEA N ER AT THE
T IM E OF C LEA N IN G . UNCO NTROLLED
F U E L EN TER IN G COMBUSTION CHAM ­
BER IN THIS MANNER CAN CAUSE THE
ENGINE TO "RUN AWAY" AND POSSIBLY
DESTROY ITSE LF AND CAUSE INJURY
TO PERSONNEL.
Engine a ir c le a n e rs a r e o il bath type. Follow
the procedure given in ENGINE FUEL SYSTEM
(SEC. 6M) of th is manual, to m aintain air c lea n ers
in se r v ic e a b le condition.
FUEL SYSTEM
Make p eriod ic inspection of fu el filte r s , lin e s ,
and injection units fo r evidence of leak s and dam­
a g e. Repair a s n e c e ssa r y . A lso , check operation of
a c c e le ra to r control linkage for fr e e m ovem ent.
Check operation of engine stop m echanism which
m ust function p erfectly .
R efer to applicable portion of ENGINE FUEL
SYSTEM (SEC. 6M) in th is manual, for detailed
inform ation on fu el filte r s , governor control m ech­
an ism and se r v ic in g fu el in jecto rs.
Fuel sy ste m units which require periodic
m aintenance s e r v ic e s are:
1. Engine a ir c le a n er s and fu el filte r s - ca re
m ust be taken when fillin g fu el tank to prevent
entry of dirt and w ater.
2. F uel lin e s and connections - should be in ­
sp ected regu larly for evidence of lea k s.
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL