Perkins L4 Workshop Manual - L-36 Fleet

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lA MARINE ENGINES-W.4 exchanger) cooling also incorporate a water pump of the centrifugal variety. Ceotrüugal Type Water Pump. Since the centrifugal type water pump employed on those Marine engines incorporating indirect (heat exchanger) cooling systems is identica! with that pump titted to <strong>L4</strong> engines in genera!. maintenance instructions for this type of pump may be obtained by referring to Section Q. Rubber Impeller Type. This type of pump is gear driven inasmuch as a gear wheel attached to the impeller driving shaft is in constant mesh with the engine camshaft gear whee!. the pump itse!f being !ocated on the starboard side of the engine directly below the dynamo. Removal aod Dismaotling. First dis~onnect water inlet and outlet hoge connections. The pump may then be detached by removing the setscrews that secure it to the engine timing case. To dismantie the pump, proceed as follows :- Remove rear end cover. Remove impeller. Remove wearplate. W ith the front bearing cover removed. a suitable press may be used to press out the impeller shaft together with the front bearing, leaving the driving gear wheelloose in its housing. The cam in the impeller housing maf then he detached by removing the single securing setscrew. Remove rubber seal in impeller housing. Remove rubber .. 0 ,. ring. Remove distance-pieces. The driving gear wheel housing and impeller shaft rear hearing may then be removed from the pump body. Finally remove front rubber seal. To reassemble the water pump, the reverse order of the above procedure should be adopted, care being taken 'when replacing the rubber impeller that the blades alllay in the same direction relative tv the rotation of the pump. i.e. blades trailing. When reassembling, ensure that the rubber impeller is coated with a layer of water resisting grease. It should also be noted that, if necessary, the impeller may be dismantled without removing the water pump. When replacing the cam fitted in the impeller housing. be certain to treat the entire top surface. rear face and securing setscrew hole with a suitable jointing compound. NOTE : This cam will go into place one war only. With the assem bied pump fitted to the engine. backlash between the pump and I:amshaft gears should be .003 in. to .009 in. (.08 to .23 mm). To achieve this in production. two joints may have been fitted between the pump gear wheel housing and the ~ngine timing case. Should this be SQ. ensure that both joints (or two new joints) are replaced when refitting the pump. ti the engine is to be withdrawn from service for any length of time it will be necessary to effect lubrication of the rubber impeller at the commencement of the storage period. Tbis may be achieved by removing the end cover (Item 1. Fig. W.2) and placing glycerine between the vanes if the impeller (Item 2. Fig. W.2). Exhaust Manifold. The exhaust manifold is water cooled and constructed of cast iron. An air release cock is provided at the forward end of the manifold jacket. whereby any air present in th~ water cooling system may be removed. OU Cooler. Provision is made at the front end of tl.e sump for the fitment of an engine lubricating oir cooler. With this, heat from the engine oir is lost as it circulates round a system of tubes through which are pumped water from the cooling system. With the fitting of a hydraulic gearbox, a further similar type oir c;ooler must be titted in order to cool the gearbox oir. tThe mounting for this additional cooler is on the top of the gearbox. The pump necessary to lift the oil is ~nclosed in the gearbox- Sump Oir Pump (Hand Operated). On the majority of marine installations it is impossible to gain access to the sump drain plug which is situated on the bottom of the sump. Therefore, in order to facilitate the draining ot the engine oil. a hand pump may be provided This pump when used must be titted ~'emote from the engine. Drainage of the sump is etfected by operation of the pump af ter attachir:g a leng th of suitable piping to the inlet side of the pump and placing the free end of the pipe into the SIImp via the dipstick orifice. ~ ".
J . 1.4 MARINE EN G INEs- W . 5 ~ y uuuuu DAlLY Check Dil level in sump and gearbox. Check cooling water circulation. Check lubricating oil pressure. Check water level in header tank of heat exchanger when fitted. EVERY 50 HOURS Clean gearbox oil filter (hydraulic type gearbo~ only). Check. and if necessary. top up batteries with distilled water. EVERY 100 HOURS Check oil level in reduction gearbox where fitted. Lubricate and examine adjustment of single lever throttle control (if fitted). Clean pre-filter if fitted to lift pump. Check oil fi(lw to rocker shaft. Examine valve springs and check tappets. Examine and clean water inlet weed trap and <strong>L4</strong> MARINE ENGINES strainer (when fitted). Examine engine holding down balts. Drain oil trom sump and fill with new lubricatlt. Clean feIt element in lubricating oil filter. Unscrew drain plug on final fuel filter. replace .vhen clean fuel appears. EVERY 500 HOURS Clean and check atomisers. Renew feIt element in lubricating oil filter. Clean gauze trap in Jubricating filter body. EVERY 1,000 HOURS When fitted. examine heat exchanger fur scale formation and de-scaJe if necessary. Inspect commutators and brushes of dynamo and starter motor. Renew element in Final Fuel Filter. Whenever Engine is removed nom Boat. Clean sump strainer. Clean out fuel tank. u u For preservation of laid up engines see page F .2. u ,. u' Ui. U', U: ~ u Y'
Page 1 and 2:
u u u ...J J Perkins Engines Peterb
Page 3 and 4:
Page IV All threads used on the L4
Page 5 and 6:
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Page 7:
INDEX TG ENGINE PHOTOGRAPHS I. Brea
Page 15 and 16:
Page B2 Details of Industrial engin
Page 17 and 18:
Page C2 Starting the Engfne-cantinu
Page 19 and 20:
1 DIFFICULT STARnNG No Foei at Atom
Page 21 and 22:
1 1 J DO KEEP THE ENGINE CLEAN. AND
Page 23 and 24:
Page F2 PRESERV AllON OF LAID UP EN
Page 25 and 26:
-J J J J FILTERS A prime considerat
Page 27 and 28:
1 Filters-continued Pa1!e G3 Fig. G
Page 29 and 30: 1 1 ., Filters-continued rage G5 Fi
Page 31 and 32: Page H2 Cylinder Head Maintenance-c
Page 33 and 34: u Fig. ~- , . i u- The pistons are
Page 35 and 36: ~ l Pistons and Connecting Rods-con
Page 37 and 38: ~ , Page L 1 -.. ., -,. -, ..., -,
Page 39 and 40: ~ . -,. ~ " ,., J, Crankshaft and M
Page 41 and 42: 1 .., TIMING (N NOTE.- When checkin
Page 43 and 44: ~ ~ 1 .., -; J ..., -J ~ I - .., Ti
Page 45 and 46: Page P2 The OU Pressure Relief Valv
Page 47 and 48: ~ Page P4 Assembie idler gear, pump
Page 49 and 50: 1 ! 1 u Paee u W A TER PUMP(Q) ] ]
Page 51 and 52: u Page u u u u ~ J pump body and pu
Page 53 and 54: I U u Page SI u FUEL SY STENl (S) T
Page 55 and 56: ~ . .., - .., u ~ ~ 1 J ] Fue/ lnje
Page 57 and 58: , u u Page in u J J ] , .., ., ...
Page 59 and 60: . . ~- Pag~ .., Iel InjectÎon Syst
Page 61 and 62: ~ t ~ 1 u ., 1 1 J Fuel Injection S
Page 63 and 64: . ~. . u ~ , u u u u u u u J J J Fu
Page 65 and 66: . L: ~ 1 u u gj;;::;"~ Fuei [njecti
Page 67 and 68: ] J ] - - ~ = ~ °- " -- w '< ." ~
Page 69 and 70: Page T2 .\{ echanica/ Governor-cont
Page 71 and 72: faze U2 to tbe cranksbaft flange, a
Page 73 and 74: Page V2 SCHEDULE OF BunnING CLEARAN
Page 75 and 76: Page V4 SCHEDULE OF BUn.DING CLEARA
Page 77 and 78: . c Settings ""'Oc ..., L4 MARINE (
Page 79: u uuI ' u u ~ u u u u u u u u u L4
Page 83 and 84: 316-125 VaJve Seat Cutter Pilot Eng
Page 85: 1 ] 1 ~l J y '1 ~ ~~ y < ~-.., f- Z
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Perkins L4 Workshop Manual - L-36 Fleet

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