Service Manual Nissan Cedric Model 31 Series
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f t T o h f If L 1 SERVICE MANUAL NISSAN CEDRIC MODEL 31 SERIES NISSANI A NISSAN MOTOR CO LTD c OTEMACHI BLDG OT CHI CHIYODA KU TOKYO JAPAN CAlLES ADDRESS NISMO TOKTO PHONES 211 5211 9 oj 1 I i fk r Ii i J 1 w 4J 1 l v J J vvJ V vJ J J I 31 CEDRIC Model NISSAN f r I f J 11 1100 1170 i 4 o L U VP 31 L U 31 L 4490 P U 2630 LIG31 U 2025 U CEDRIC G31S H31 L L 50 1100 4590 4 NISSAN 790 OF 1505 1070 elMENSIONS 1373 1420 ill Il INTRODUCTION of Th1S manual has been complied for pourpose aSS1sting our d1stn butors and dealers for e fective serV1ce and ma1nta1nance of the moael 31 Senes Each assembly of the major components 1S descnbed 1n deta1l In add1tion comprehens1ve 1nstructlons are glven for complete d1smantling assembling and 1nspectlon of these assemblies Parts should be used as re It 1S emphas1sed that only genu1ne Spare placements l f7 I r GENERAL SPECIFICAliON L DIMENSIONS G31S U L31 U WP L 3l U L H31 U L G31 U VP L 3l U Delux Overall length 4590rnrn 4490mf1 4690mm 4650mm Overall Wldth 1690rnm 1690mm 1690mm I690mml Overall helght 1505mm I505mm 1520mm 1505mm 1530mm Wheel base 2630rnm 2530mm 2530mm 2690mm Tread front I 338rnm 1338mm 1338mm 1338mm Tread rear 1373mm 1373mm 1373mm 1373mm Road clearance 190mm 190mm 190mm I90mm Room or Rear Body 200mm lntenor length 1885mm 1785mm 2730mm 1945mm 1750 990mm 3 persons 6 persons 500kg 400kg lnte rlor wldth l390mm 1390mm 1390mm lntenor helght 1180mm Il 80mm I185mm 1390mm 950mm 1180mm WEIGHT Vehlcle welght 1210kg 1180kg 1350kg 1260kg 1240kg 1315kg Seatlng capaclty 6 6 8 3 I 6 6 t r persons Max loadage 500 400kg Gross vehlcle 1540kg 1510kg 1790kg 1590kg welght 1570kg 1980 2045kg PERFORMANCE maXlmum speed I40km h 130km h 88m h 81m h Fuel consump ISkm hter 17km hter tlon Grade ablhty o 506 o 420 sm 9 0 496 Mlmrnurn turmng S 6m 5 4m radlus Stoppmg dlstance 14 3mm 143m 143m 143m Imtlal speed 50 krn h lc l CONTENTS i r f o1if Page ENGINE 1 N GENERAL SPECIFICA TIONS f1 LUBRICA TION t l F SERVICE OPERATIONS WITH ENGINE Ii IN POSITION fiI t ROCKER MECHANISM 19 ADJUSTING THE IGNITION TIMING 37 2 FUEL SYSTEM 40 FUEL SYSTEM 40 CARBURETOR 45 FUEL PUMP 50 ADJUSTMENT AND INSPECTION OF ENGINE 55 k t REMOVING R rf1 NG OF ENGINE lr ASSEMBLY t 61 3 COOLING SYSTEM 62 1I 1 4 IGNITION SYSTEM 69 i 4 5 ELECTRICAL SYSTEM 731 GENERA TOR R REGURA J74 l BATTERY f 98 6 CLUTCH T40 1105 DESCRIPTION OF CLUTCH CONTROL 113 t J 11 7 TRANSMISSION f 118 I2I DISASSEMBLING THE CASE r 1 ASSEMBLING THE TRANSMISSION 1 29l SELEC TOR INER OPERA TING LEVER CROSS SHAFT 8 PROPELLER SHAFT UNIVERSAL JOIN TS h r i tL Jo 1 ENGINE ENGINE The engIne IS of monobloc construction and IS htted WIth overhead valves operated by rockers and push rods from the camshaft 011 seals are f1 tted to the valves Three steel backed beanngs support the cam shaft wP1ch IS cham dnven The 011 pump and d1stnbutor are dnven from the camshaft each component haVing ItS own dnve shaft The pIstons are each fItted wIth two compreSSIOn nngs and a slotted 011 control of nng Beanngs the thm shell preformed type are htted to the onnectIng rod bIg ends and to the maIn beanngs A counter blanced crankshaft IS fItted The centnfugal water pump and coohng fan are dnv en by the dynamo belt GENERAL SPECIFICA TIONS 1 Model H Engme G Engme Type Over head valve 4 c1y 4 cycle 3 35x3 27m 80x74 mm Bore x Stroke 85x83mm f Total piston dIsplacement 1 883 cc I 488 cc CompreSSIon ratio 8 5 I 8 0 I 71 5000 PS Brake horse power 88 4800 PS 95 5000 SAE 77 5200 SAEH 6 7 lb ft 11 5 83 Ib ftl Max torque 15 kgl13 kg PS 3200 PS 3200 rpm rpm 16 6 kgl20 lb ft SAE12 0 kg 87 Ib ft 3600 SAE F1nng order 1 3 4 2 I 3 4 2 2 1t12 11 0 cm CompreSSIon 12 0 kg cm2l72 Ib m2 kg l581bln 300 300 rpm rpm 1 Engme RIgnt SIde f Engme Left SIde 2 Draining the Oil The 011 metal pan IS a pressIng WIth the draIn plug On new and recondll1oned engmes the 011 must be draIned and refIlled wIth new 011 after the first I 000 km and subsequently at Intervals of 5 000 km DraIn the when the 011 engine IS hot SInce warm 011 flows freely and takes wIth It any sludge or sedIment WhICh may have accumulatted Never use or for petrol paraffm flushIng purposes Such cleamng me dIums are never completely dispersed from the engIne lubncatlOn system and WIll remaIn to contamInate any fresh 011 ThIS may cause premature bearIng faIlure 0 I Pressure The normal 011 IS I operatmg pressure kg cm21 rpm 14 22lb m2 550 at 2000 rpm IdlIng speed and 3 4 kg cm2 rp d 56 81b m2 2000 rpm Ref ling When refillIng the sump do not pour the 011 In too qUIckly as It may overflow from the fIller onfIce and mIslead the operator as to the quanl1ty of lubncant In the engIne Before testIng the level of the 011 ensure that the vehIcle IS as near level as possIble Always WIpe the dlpsl1ck clean wIth a non ffuffy cloth f before takIng the readmg It should be remembered that l1me must be allowed for new 011 to reach to sump before readmg the dlpsl1ck Check for Low Oil Pressure IS the Instrument The Igm The 011 pressure gage Installed at panel when the the 011 tJon sWItch IS turned on and engIne started fInng and pres sure Increase normally as before menl1oned normal sure the engIne runnIng It IS Should It keep pres dunng result or the of 011 In the 011 of the 011 pressure down too low shortage pan of the level and Check the level of 011 m the 011 pan by means gage top up low after the 011 sWItch If necessary If the pressure IS stdl too refIllIng 3 off and ascertaIn that the straIner IS clean and not choked wIth sludge also that no aIr leakage eXIsts at the straIner unIon on the suC110 side of the pump In the case of 011 pump being defecl1ve remove the umt to recl1fy the fault the A If the engme beanngs are worn 011 pressure WIll be reduced complete beanng overhaul and the fltl1ng of replacement parts IS the only remedy necess1tal1ng the removal of the engIne from the chassIs 1jr 2 r 4 LUBRICA TION Circulation Pressure lubncatlon lS used throughout the umt and lS provlded by gear pump nondralnlng The 011 pump lS bolted under the crankcase and lS dnven from the camshaft gear by a short vertical shaft 011 drawn lnto the pump through the stralner and lS dehvered through lnternal 011 ways The flow then passes through dnlhngs ln the crankshaft The con nechng rod lends are dnlled for Jet lubncatlon to the cyhnder walls From the rear camshaft beanng the 011 passes upward through a dnlhng ln the cyhnder block and the rear rocker shaft bracket to lubncate the rockers and then dralns back lnto the 011 pan Vla the push rod aperatures 011 from the center camshaft beanng enters a gallery on the left hand side of the englne and lubncates the tappets through Indlvldual dnlhngs As the camshaft rotates groove ln the front Journal reglster wlth a small hole In the camshaft locating plate thus all oWing a small amount case each revolution the camshaft of 011 to pass lnto the tlmlng durlng of to provlde lubncation for the tlmlng chaln and gears From the tlmlng case the 011 returnes Vla a draln hole back to the 011 pan t 3 r Flg 5 n m h pumP 1 0 h OUgh pan System l O ho arm Lubncatlon om 011 ml rocker o 2 flow Flg overhead h and u 1 beanng Th gallery r 11 1 en TJ l or FIg 3 Component of 011 fIlter Removmg the By pass Frlter A new fIlter element should be fItted every 15 000 km The fIlter forms part of the maIn all gallery of the engme unscrew the bolt when To remove the fIlter It IS only necessary to center with the element the bowl can be removed from the crankcase complete element and Take care not to lose the rubber seahng rIng Remove the note the assembly of the components Wash out the bowl wIth pettol so that It IS clean It is Important to thoroughly dry the bowl to obViate any contammatIon of the lubrIcatmg 011 Replacing the Filter wIth the WIth the center bolt the washer and the sprIng together a new element Place the dIstance collar in posItIon In the bowl Insert over the bolt wIth the end towards the element The pIece center flanged bowl of fIlter must now be fIlled wIth 011 Offer up the complete assembly of the to the engIne and secure mto posItIon by means center DOft ffj Removmg the 01 Pan ft IS 3 I htres DraIn the 011 and the draIn The sump capaCIty replace plug Inserted from the of Remove the set screw bolts whIch are underside bolts from the bottom edge of the bell the securIng flange and the lower from the care not to damage hOUSIng Lower the 011 pan engIne takIng the JOInt washers In the process 7 i ii1 JlI I D lt o 1 Flg 4 Removmg the Oil Pump Remove the 011 pan and plck up stralner The bolts secunng the 011 pump bottom cover are long l enough to secure the pump f to the crankcase 4 lllustrates Flg the pump In explosed form Unscrew 7 j the bolts and remove the if f pump wlth Its dnve shaft y S F 1 t Y f l I t t f H 11 f Fig 5 8 Dis mant ing the Oil Pump Remove the and setscrews sprIng ashers whIch secure the cover to the body and take off the cover On tIltmg the body upsIde down the dnve gear and Its dnve shaft wIth a gear Refitting the Oil Pan Clean out the 011 pan by washIng It wIth gasohne the care to remove any traces of the sedIment before the refIttIng 011 pan to the engIne Pay attentIon to the 011 and crankcase patlcular pan JOInt faces and remove any traces of old JOIntIng ma enal Exalnlne the JOInt washer and renew It If necessary The old jOlnt washer can be used again 1f It IS sound but It IS advIsable to fIt a new one Smear the faces of the JOInt WIth grease and fIt the JOInt washer LIft the 011 pan Into pOSItIon and lnsert the setscrews mto the flange tlghtmg them up evenly Reassemblmg the Oil Pump OIL PUMP Performance test 22 ltr 5 8 US Gal mmute at 2000