Mack Trucks MP8 — Mack MP8 User Manual

REPAIB INSTRUCTIONS, PART 2 Camshaft lnsp€ction To arcid uЎneoe$ary derhaъti.o, coЎduct a lhoroogh icsp€clioЎ ol lhe camshait feinsralling бner fйpracing lhe beafing bбckei Brackel Replacement Procedure L Bemow lh€ lower beaЎinq b€.kets usЎng a pry bar The rearnosl Ny 7 b€ckбl bй Bnded by usinq a soft-hced manet and tapping sid€ lo sidй. Crhealignmenl pins should come oll the cylЎnder hйбd with lhy bEc*йrs. lr Ўor, remove the pins.) FЎgUlї3cfubcBї'ngBrcchlLЎkrHбtr WHEN BEPLACING FACTOBYINSIALLED JOUFNALS . rt a camshaf jourcar has seЎzed, Do NoT tъlx б r€plбcamйnl bбaring bEckйl wirh rh6 o rig lnal laclory-inslalred bearinO brack€rs.

This is bsause lhe oЎiqinal bearing b€ckels were alion bored wheЎ lhй 6с0inй wбs manutacluEd. A lsden bEckels must be . Whec rйptбcing a cylindйr hйбd. do nol mix Ў4 bearing b6ckelswith original b€бnng bEckers |lom lhe old cytinder head. Use onlv new beб n0 bЙckйls on a nйw cvlinder WHEN REPLACINGЎNSTALLING AFTERMARXEfJOURNALS . ll the@ are aleady repla@nйnt b€arlng bEcksl assmblies on the engЎnй, aЎd or core ass€mblies бre damagedЎ all s*n 4senblies nusl be eplaced. Raplac€mйnr backйt assmblies can be Ўdefillied by lh6 dal-shaped aliqnm6ff pin holes, . For replacement bбck6l assmblies usd ln lo€lions 2lhrough 6, both alignm6rf pin holes ar6 oval-shaped iof sidelesЎde adjushenl.

For bdckйls used in lo@lions 1 and 7, onealiqnmйntpin hol6 is oval-shaped for l@nr-lo{ear adjushert ihe se6nd pic hole is ound wirh an б ignmenl pln 2. Clean lhe conlact sulacйs of rhe oylinder hубd and lhe l@eЎ bйa ng brбckets. 3. Usinq a meiatstamp or e йdric йiching tool, mark thй с4 beanng b€ckeis and caps wilh lhe nucb6rs, 1 th@ugh 7, ЎЎdlcalicg the loclion їr whch eбch їssйmblywilrbe ^caurtoN Do not e dcesЎ@ lc@ la pnch lhe ba.ker аsсь$ whъ catkЎng rheit p6ilЎan on the ctьndet had. Dacage lo ъrponenE ca, resuЎЎ. lьбrk thй boaring caps lo lndi€le lhal allermaiket beбing back6t and cap бssйmblies haE bййn in$бnйd