Perkins L4 Workshop Manual - L-36 Fleet

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~ L ~ I ~ .., LJ u SCHEDULE OF CLEARANCES & TOLERANCES (V: u All threads ~ed 00 the L4 Eogine except 00 prGprietary equipment and the crankshaft are Unified Series, aod Americao Pipe Series. Tbe crankshaft aod starting dog nut are threaded 1 inch Americao Natiooal Fine of 14 T.P.I. U I U u u u u u The new threads are not interchangeable with B.S.F. and althougb B.S. W. have the same number of threads per inch as the Unified Coarse Series, intercbanging is not recommended, doe to a difference in thread form. 2. 3. 4. u u 5. u 6. u u J ~ J The data regarding clearnnces and tolerances are given as a guide for personnel engaged upon major overhauls. Tbe figures in the column .. Permissible Dimensions ,t are the drawing sizes to which tbe parts are made. These dimensions are given in limit farm and represent tbe minimum and maximum sizes to which parts may be accepted when new, as, ror example, .4985 -:499 The difference 111,ntPn '1 .-. fnr between - " qh"ft ~ the ni"m~tpr minimum and maximum dimensions quoted in para. 2 is known as thc manufacturing tolerance. This tolerancc is necessary as an aid to manufacture and its numerical valuc is an expression of the accuracy of the design; it mayalso be considered as a numerical expression of the desired quality of workmanship. For the example referred to in para 2 thc tolerance is 0.0005. If when carrying out a major overhaul it is found that a bush and corresponding shaft have worn and that the majority of wear has taken place in the bush it may be necessary to renew the bush only. Similarly if the majority of wear has taken place on the shaft it might only be necessary to rencw thc shaft. During the overhaul of wom components personal initiative must be exercised at all times. It is obviously uneconomical to return wom parts to service with an expectation of lire which may involve labour costs agaiÎ1 at an carly date. Further information can be obtained on request [rom the Service Division, Perkins Engines Ltd., Peterborough, England. To ensure rou obtain the best results from your engine and to safeguard your own guarantee, fit only genuine Perkins Parts. These are readily obtainable throughout the wor Id. I Page VI
Page V2 SCHEDULE OF BunnING CLEARANCES AND TOLERk~CES TO BB ADHERED TO WHEN OVERHAULING ENGINES TO FACTORY STANDARDS (ENGINE TYPE L4) . .
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:
1 J -, " l 1 1 -, -.J ..,.j .., ...
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: faze U2 to tbe cranksbaft flange, a
Page 75 and 76: Page V4 SCHEDULE OF BUn.DING CLEARA
Page 77 and 78: . c Settings ""'Oc ..., L4 MARINE (
Page 79 and 80: u uuI ' u u ~ u u u u u u u u u L4
Page 81 and 82: J . 1.4 MARINE EN G INEs- W . 5 ~ y
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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