Ercoupe Service Memorandum 46

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ERCOUPE SERVICE MEMORANDUM No. 46 1. The purpose of this memorandum is to give de- tailed instruction on the relubrication of sealed bear- ings used in the Ercoupe. It is recommended that all the sealed bearings be relubricated at each air- plane overhaul. The lubricant to use is AN-G-15 grease; its properties are the most satisfactory for this purpose. 2. There are two different types of sealed bearings in the Ercoupe: Heim Unibal Spherical Rod End Bearings, and Single Row Ball Bearings. (Heavy Duty Metal Shield Bearing (AN 200) and Inter- mediate Duty Metal Shield Bearings (AN 201)). 3. Relubrlcatlon of the Helm Unlbal Spherical Rod fnd Bearing: There are 11 Heim Rod End Bearings in the Ercoupe Control System. These bearings will be found at the following locations : Assembly Pushrod; aileron to bellcrank . Pushrod; ail. cont. mast to bellcrank.. Pushrod; control column to mast.. Shaft and column assy.; controL Shaft and column assy.; control .. Assembly Part No. 415-52034 415-52038 415-52036 415-52117 415-52117 At Serial No. 890, the Heim Bearing used on the control shaft and column assembly for the control column to nose gear pushrod was changed to MD36- 14S which has a longer threaded end and is identi- fied as Part No. 415-52117-23, while the control shaft and column assembly bearing for the control column to mast pushrod remains Part No. 415-52117- 18. Also at the same time, the pushrod was short- ened from 17-3/4" to 17-3/8" and is identified as 415- 52035 G. With this in mind. correct replacement of the Heim bearings for the two above pushrods and the control column to nose gear pushrod can be made, if necessary. For relubrication of the above bearings, make Lubrication Adapter as illustrated on page 3, Figure 2. a. Remove pushrod assembly from airplane. b. Remove Heim Rod End Bearing from the push- rod by loosening locknut and unscrewing from pushrod. Erco No. of Bearings HeimNo. Bearing No. per Airplane MD36-14 415-52034-2 4 MD36-14 415-52038-2 4 MD36-14 415-52036-2 1 MD36-14 415-52117-18 l MD36-14S 415-52117-23 1 c. Inspect bearing for any excessive play, wear, or restricted swivel and rotation and replace where necessary. d. Remove grease retainer plug (Figure 1), if existing. e. Soak the rod end bearing in hot engine oil (300° to 350°F.), for 5 to 10 minutes. f. Screw the Lubrication Adapter onto hot rod end bearing (Page 3, Fig. 4). g. Apply pressure grease gun to adapter fitting and force AN-G-15 Grease through bearing, while still hot, to flush out grit and old grease. h. After thoroughly cooled. pack rod end bear- ing with AN-G-15 Grease, using adapter. i. Press Heim Bearing Grease Retainer Plug ( 415- 52032) into rod end after final packing. (Ref- erence Page 3, Fig. 3.) j. Reinstall bearing into pushrod assembly. Pa..- 2-MEMORANDUM No. 46 4. Relubrlcatlon of Heavy and Intermediate Duty Metal Shield Bearings: There are 8 Metal Shield Round Bearings In the Ercoupe Control System. The bearings will be found at the following locations : A$sembly Assembly Part No. Control assy.; Ail. outer rib .... Shaft and column assy.... Support; control mast. ..... 415..52047 L&R ..... .415-52117 ...... 415-52047 a. Remove assemblies from airplane. b. Remove bearings from assembly, pressing or tapping out as necessary after removal of re· taining parts. Apply pressure to outer race only, never to seal or Inner race. The two control column base assembly bearings are staked in place with four center punch marks on each side of casting. The bottom bearing In the control mast support are held in place with a snap ring In the groove under the bear- ings. c. Inspect bearings for any excessive play, wear, or restricted rotation and replace where neces. sary. d. Soak the bearings in hot engine oil (300° to 350°F.) for 5 to 10 minutes. ANNo. AN201-K4A AN200-K4 AN201-KIOA Erco Bearing No. 415-52307-1 415-52218-3 415..52057-2 No. of Bearings per Airplane 4 2 2 e. Insert bearings into Bearing Lubricator and flush with AN-G-15 grease, while hot, to re- m.ove grit and old grease. The Alemite Divi- sion of the Stewart-Warner Corporation has available a bearing lubricator for relubrica· lion of the above bearings. f. Pack bearings with more AN-G-15 grease after thoroughly cooled off. g. Install bearings In assembly and reassemble retaining parts. 5. Re-installation of Parts : a. Reinstall component parts and pushrods, as necessary according to the overhaul proce- dure being used. Rig ship according to Service Memorandum No. 35. ~ ~)I ' (I)~ (II 'II Q.);) ~·l"tl .... ~ 0.._ ~~~~ ~l"tl Q.;o ~:u tl-r" <Q(t llGI ~~· \Q 6 ..., ~ ~ ~ 0\ ' ~ IJI ~' ~ .• I . .t. ~ .t. -1>..-:\ Uiilil>i ....1 '' Ot '!Jtl.>,' ~1\jl\i ....,.. ..... () ......... lu ~'\l(ll ~~~r\,~ LU8RICAT!ON ADAPTOR ~~ !31 ~ ::t "'i Ill -;;;: i r- \1! C)) ~ :0 ::;: ::1) ::!>: "\J - 'II 1"'1 ~ 'i ::t:-tJSJI <:: I::J~G\ o OQ~ ~ ~ (:; ~ ,... l"lt ~ "i>.i~» ~ <::1 ~ .• , <.. "''' );l 1\) ~ ~ 3. THRU-ORILL 2. DRILL .332 .,f'O£EP ~4NF LUBR!CA TION ADAPTOR I LUB!?ICATION ADAPTOR lnstaiiE>d, forpCTckin9 roc/ t!'ncl hearings. (rOR ?ACKIN13 HElM 5EALED ROD £!vD 8EAI?IN135) FI(J. 4 MATERIAL .!i ROUND, ,STEfL FIG. 2 tJ ~r, g ~ ~ ~ R "<0~ i\0:-1 0\ ~ ~ ~ ~