( 2 ) I n s t a l l a t i o n . I n s t a l l e n g i n e S T A R T - R U N-STOP (64) switch using removal steps in reverseo r d e r . R e m o v e t a g s .3 - 1 2 0 . C o o l a n t T e m p e r a t u r e G a g e .See (80, fig. 3-18) and proceed as follows:a . T e s t i n g.—(1) Gain access to the rear of the controlcubicle panel (96).CAUTIOND i s c o n n e c t n e g a t i v e b a t t e r y t e r m i n a l p r i ort o m a k i n g c i r c u i t c h a n g e s . R e c o n n e c t t h ist e r m i n a l p r i o r t o c h e c k i n g m e t e r s , g a g e sand indicating lights.(2) Tag and remove the lead from the SENDcontact of the COOLANT TEMPERATURE gage (80).(3) The O to 500 ohm FREQUENCY ADJUSTrheostat on the control cubicle panel (96) can be usedt o c h e c k t h e C O O L A N T T E M P E R A T U R E g a g e . D i s-connect and tag all leads from the FREQUENCY AD-J U S T r h e o s t a t.(4) Connect a multimeter between the wipera r m t e r m i n a l a n d e i t h e r o t h e r t e r m i n a l o f t h e F R E-QUENCY ADJUST rheostat and adjust the rheostatu n t i l t h e m u l t i m e t e r r e a d s p r e c i s e l y 4 6 0 o h m s . D i s -connect the multimeter but do not disturb the rheostats e t t i n g.(5) Check that START-RUN-STOP switch (fig.2-5) is set to RUN, BATTLE SHORT switch (fig. 2-5)to ON, and the DC CONTROL CIRCUIT BREAKER(27, fig. 3-17) is in closed ON position. Connect the460 ohm resistance of the FREQUENCY ADJUSTrheostat in series with ground and the SEND terminalo f t h e c o o l a n t t e m p e r a t u r e g a g e . G a g e s h o u l d r e a da p p r o x i m a t e l y 2 4 0 ° F .( 6 ) D i s c o n n e c t r h e o s t a t f r o m c i r c u i t a n d r e -connect leads removed in paragraph (3) above/(7) If the COOLANT TEMPERATURE gaged o e s n o t o p e r a t e c o r r e c t l y , r e p l a c e i t .b .R e p l a c e m e n t . R e p l a c e t h e C O O L A N T T E M-PERATURE gage as follows:( 1 ) R e m o v a l .( a )Gain access to the rear of the controlcubicle panel (96).( b ) T a g a n d r e m o v e t h e l e a d s f r o mC O O L A N T-T E M P E R A T U R E g a g e ( 8 0 ).( c )Remove the two nuts (81), two washers(82), and clamp (83) which secure the COOLANTT E M P E R A T U R E g a g e ( 8 0 ) a n d r e m o v e g a g e.( 2 ) I n s t a l l a t i o n .Install COOLANT TEMPERA-TURE gage (80) using removal steps in reverseo r d e r , R e m o v e t a g s .3 - 1 2 1 . O i l P r e s s u r e G a g e.See (78, fig. 3-18) and proceed as follows:a . T e s t i n g(1) Gain access to the rear of the controlcubicle panel (96).CAUTIONC o n n e c t b a t t e r y n e g a t i v e t e r m i n a l p r i orto checking the OIL PRESSURE gage (78)r e a d i n g s.R e m o v e t h i s t e r m i n a l p r i orto making circuit changes.(2) Tag and remove the lead from the SENDterminal of the OIL PRESSURE gage.(3) The 0-500 ohm FREQUENCY ADJUSTrheostat can be used to check the OIL PRESSUREg a g e . D i s c o n n e c t a n d t a g a l l l e a d s f r o m t h eF R E Q U E N C Y A D J U S T r h e o s t a t.(4) Connect a multimeter between the wiperarm terminal and either terminal of the FREQUENCYADJUST rheostaL and adjust FREQUENCY ADJUST-M E N T r h e o s t a t u n t i l t h e m u l t i m e t e r r e a d s p r e c i s e l y3 0 o h m s . D i s c o n n e c t t h e m u l t i m e t e r b u t d o n otd i s t u r b r h e o s t a t s e t t i n g.(5) Set START-RUN-STOP switch to RUN,BATTLE SHORT switch to ON, and DC CONTROLCIRCUIT BREAKER to the closed ON position.Connect the 30 ohm resistance of the FREQUENCYADJUST rheostat in series with ground to the SENDt e r m i n a l o f t h e O I L P R E S S U R E g a g e . G a g e s h o u l dr e a d a p p r o x i m a t e l y 1 2 0 p s i .( 6 ) D i s c o n n e c t F R E Q U E N C Y A D J U S T r h e o s t atf r o m c i r c u i t a n d r e c o n n e c t l e a d s r e m o v e d i nparagraph (3) above.(7) If the OIL PRESSURE gage does not operatec o r r e c t l y , r e p l a c e i t.b . R e p l a c e m e n t . R e p l a c e t h e O I L P R E S S U REgage (78) as follows( 1 ) R e m o v a l.( a )Gain access to the rear of the controlcubicle panel (96).(b) Tag and remove the leads from the OILP R E S S U R E g a g e /(c) Remove the two nuts, two washers, andclamp which secure the OIL PRESSURE gage andr e m o v e g a g e .3 - 44
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