Andrews Products, Inc.
Contents
1. When adjusting pushrods make sure that cam lobe for that pushrod is on low lift point Lifter housing covers can be temporarily removed to gain another 1 4 inch of clearance Short pushrod cover tubes are available from HD Short pushrod cover tubes make the pushrod adjustment easier Part numbers are 17938 83 and 17634 99 You will need 4 of each part number to install a complete set For engines with stock pistons and stock heads 12N 21N 26N 31N and 37N cams should be able to bolt in without head work 50N cams need piston to valve clearances and valve to valve clearances checked 50N 54N and 55N cams need 620 minimum valve travel and 060 minimum piston to valve clearance With Andrews Products high lift steel collars part 293115 includes 4 pieces setting valve spring travel for either of these two higher lift cams will be easier Andrews collars fit 1999 2003 Heads for 2004 2006 engines use beehive type springs 12N cams are similar in specifications and perfor mance to stock 88 cams SUPPORT PLATE ssa ee j SNAP RING Figure 2 Front camshaft HD service manuals for 06 Dyna and all later twin cam engines specify a 100 thick thrust washer on the outside end of the front camshaft Front cam end2. Andrews Products Inc 431 Kingston Ct WARNING Mt Prospect IL USA 60056 WARNING CONVERSION CAMS 847 759 0190 ph CONVERSION CAMS Will NOT FIT 2007 847 759 0848 fx Will NOT FIT 2007 or LATER ENGINES www andrewsproducts com or LATER ENGINES Installation Instructions Conversion cams Roller Chain Drive to 99 06 Twin 88 engines We recommend that you refer to a current 06 Dyna or later factory service manual and follow factory procedures for camshaft removal and replacement Andrews Products conversion cams operate with 2006 Dyna or 2007 roller cam chain drives and use stock size lobe base circles Therefore unless you have modified the cylinder heads the original stock push rods will be the correct lengths If the original pushrods will be reinstalled removing the fuel tank s and rocker boxes will be necessary Mark the pushrods so they can be replaced in their original locations since not all stock pushrods are the same length To save installation time by NOT removing fuel tanks and rocker boxes the stock pushrods can be cut with bolt cutters and then removed in two pieces EZ install pushrods can then be installed They are available in aluminum or chrome moly steel Andrews Products part numbers for EZ install pushrods are 292188 for aluminum and 292088 for steel pushrods Remove 10 screws holding outer cam cover When this cover is reinstalled there is a specific tightening sequence and torque rating for a
3. ed 25736 06 Spacer 130 for cam alignment use as required 25737 06 Spacer 140 for cam alignment use as required 25738 06 Spacer 150 for cam alignment use as required 25673 06 Crankshaft pinion shaft sprocket 17 teeth 25244 99A Outer cover gasket 25728 06 Stock rear cam sprocket 34 teeth 2002 06_only Use of stock 06 sprockets on 99 00 or 2001 conversion cam installations will result in engine alarm light always ON Following part MUST be used with all 99 00 01 engines 216015 Andrews rear cam sprocket part number 34 teeth Some of the screws listed above are the same as in earlier engines and they can used again WARNING Conversion cams will not fit 06 Dynas or 2007 and later engines 1 13 After a trial assembly alignment of crankshaft sprocket and cam sprocket positions must be checked and adjusted with shims if necessary See factory manual for proper procedure Make sure all timing marks are aligned before proceeding Installing the new 34T sprocket requires using either the original sprocket spacer or a new spacer from HD if the original is not the correct thickness for your engine HD makes shims and spacer washers in 6 different thicknesses HD Part numbers are 25729 06 0 100 inches 25731 06 0 110 inches 25734 06 0 120 inches 25736 06 0 130 inches 25737 06 0 140 inches 25738 06 0 150 inches VERY important both cams must have as a minimum 008 010 end play in cam support plate S
4. ee figures 1 amp 2 below 15 When installing sprocket retaining bolts use Loctite retaining compound to secure the bolt threads Bolt torque should not exceed 25 ft lbs for 5 16 x 18 bolts Bolt torque for splined rear camshafts 3 8 x 24 bolt should not exceed 35 ft lbs Please note that both cam retaining bolts must be rated grade 8 Grade 8 bolts have a 6 pointed star symbol on the top of the bolt heads Reinstall the outer cam cover with the 10 cover bolts Cover bolts must be tightened to a torque specification of 90 120 in lbs The service manual shows the correct tightening sequence SUPPORT PLATE SPACER WASHER QO RING 34T SPROCKET CAM END PLAY 008 012 dL Figure 1 Rear camshaft Rear Andrews cams manufactured after July 06 do not use an O ring to align the spacer washer To adjust alignment of 34T rear cam sprocket and 17T crankshaft sprocket HD spacer washers are available in 6 different sizes Cam end play should be 008 012 minimum as shown 17 CAM END PLAY 008 012 THRUST WASHER EZ install pushrods use 2 long exhaust and 2 short intake rods To install adjust pushrod to shortest length then position in engine rocker arm end first Swing the lower end into lifter Lengthen pushrod adjuster until all free play is gone Adjust pushrod 3 5 4 full turns longer 21 24 flats and tighten locknut Wait until hydraulic unit bleeds down and repeat procedure on next pushrod
5. ll 10 screws VERY IMPORTANT Overtightening cover screws can cause aluminum engine case threads to strip Before proceeding further put the transmission in 4th or 5th gear Remove both spark plugs so there will be no resistance from compression pressure Now turn the rear wheel and align camshaft timing marks This will simplify installation of new cams Remove the crankshaft sprocket retaining bolt and the rear camshaft sprocket retaining bolt Both the crank shaft sprocket and the rear cam drive sprocket can now be removed They will be replaced with new sprockets for roller chain cam drive system Remove the original cams and cam support plate All four oil pump retaining bolts must also be loosened to permit correct oil pump rotor alignment at the time of reassembly after the cam support plate is in place with the new camshafts The old cam support plate will be replaced with the new assembly Converting 1999 2006 silent chain cam drives to the 2007 style roller chains requires new HD parts Also required are two new Andrews conversion camshafts Andrews Products conversion cam kits include ALL of the required parts Part numbers listed top of page Conversion cam kits Part numbers and years 1999 2001 288999 2002 2006 288902 8 A complete listing of required parts appears below 9 N series camshafts from Andrews Products must be used for fitting roller chains to earlier engines Series N cams are similar to 2006 And
6. ngine is an early 1999 The part number used on later 1999 en gines is 25245 00 If your engine is a late 99 or later disregard the rest of this page it is not relevant Early 99 engines have a different oil supply system than later engines Note the circled area on the photo inside engine case to the left of the pinion shaft figure 2 Early 99 engines do not have the oil boss shown circled in the photo For early 99 s it will be necessary to block a matching oil port on the 2007 cam support plate See figure 3 below For 2007 cam support plates to operate properly with early 99 engines the circled hole in photo must be permanently blocked A 1 4 x 20 bottoming tap can be used to cut threads A self locking socket head set screw will then seal the port The existing hole is correctly sized for the tap Do not drill it larger We will send no charge set screws 1 4 x 20 x 1 2 if you call us After tapping new threads in the support plate make sure to clean out all metal chips before installing the set screw figure3
7. play should also be 008 012 minimum Conversion parts Andrews Products Roller Chain Conversion Camshafts Andrews Grind Timing Duration i Springs TDC Lift Spring Travel HD Dyna 02 34 216 Stock 087 Stock 06 fuel inj 41 02 219 473 110 Stock 216812 12N 02 34 216 Stock 091 Stock 40 02 220 099 Stock 216821 21N 10 30 220 Stock 134 Stock 40 08 228 21 Stock 216826 26N 11 35 226 Stock 138 Stock 41 09 230 120 Stock 216831 31N 10 46 236 Stock 131 Stock 52 08 240 120 Stock 216837 37N 18 38 236 Stock 174 Stock 46 14 240 148 Stock 216854 54N 16 42 238 Hi lift 165 Stock 43 15 238 158 Stock 216850 50N 20 48 248 Stock 184 Stock 54 18 252 l 168 Stock 216855 55N 22 46 248 Hi lift Vor 620 52 20 292 181 620 216867 67N 24 48 252 Hi lift 209 620 58 22 260 187 620 Timing and duration listed for 053 cam lift IMPORTANT NOTE for 1999 engines If you are converting a 1999 engine to new roller chains please read the following page Cams_conversion_chain 01 pmd_ 1 15 09 IMPORTANT NOTE for 1999 twin cam engines When converting a 1999 engine to new roller chain cams please note the following This page only applies to early 1999 en gines To identify the engine as an early 1999 examine the cam support plate as illustrated in the circled area figure 1 lf the part number on the left front face of the cam support plate reads H D 25245 99 the e
8. rews Dyna cams except that the inner bearing journals are 875 instead of 1 000 Roller chain conversions for 99 06 engines require 875 diameter inner camshaft journals to fit right engine cases 10 The new conversion cams inner chains and the new 06 type support plate can now be assembled as described in the 06 Dyna HD service manual 11 Again referring to a factory parts manual the front cam thrust washer should be 0 100 thick Figure 2 on page 3 shows the 100 thrust washer assembled on the front camshaft with proper end play specified 12 With new camshafts in place the new cam support plate assembly can be reinstalled back into the engine Some HD parts are required for conversion cam installation All of these parts are available as complete kits from Andrews See top of this page for Andrews part numbers for complete cam kits HD Part Description 26037 06 Oil pump assembly 25355 06 Cam support plate assembly 4741A Cam Support plate mounting screws 10 pcs req d 11461 Retaining ring for front cam 25683 06 Inner roller chain 39969 06 Inner chain tensioner 4740A Inner chain tensioner mounting screws 2 pcs req d 25675 06 Outer roller chain 39968 06 Outer chain tensioner 942 Outer chain tensioner mounting screws 2 pcs req d 25729 06 Spacer 100 for cam alignment use as required 25731 06 Spacer 110 for cam alignment use as required 25734 06 Spacer 120 for cam alignment use as requir
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