PS Magazine - JANUARY 1974
PS, The Preventative Maintenance Monthly
ISSUE 254
JANUARY 1974
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TO SHIM-OR NOT TO SHIM
Dear Windy,
PaRa 8-15f(3)(c} of
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55±1520±²2³±20 (Oct 7²´ sEEms tµ
RaiSE A quESTion AbouT p¶TTing shims in thE Tail rotµr oN µUr
KIowa.
WE'RE supposEd To adjuST ThE ThicknEss of shim· it¸m
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Fg 8±1· To g¹T 12 dEgREEs pLUs oR minus 1 dEgREE and
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º5±in ToLERancE duRing insTaLlatiµN.
»omE of ouR nE¼ ½iowas havE no shims ¾t all. ¿hµUlÀ
Shims bE inSTaLLEd· no maTTER how thin, Windy?
Dear LieutenAnt D.
ÍÎÏ
Nosir-e±e²e!
ÐÑ DÒÓÔ
'COUrsE, the pUrpOsE ³f THE sHim iS tO allow Adj´Stmeµt Of tHe ¶·eaRA¸¹e bEtweeº tHe
tAi· »OtOr t»Ai¼ing Edge a¸d THE Tai·bOoM½ By a¾ding Or su¿t»Àcting ÁHimS, tHE P³sitioº
³f tHE stati¹ stO is ¹HAµGEdà ÄHis aFEctS The ¾egree Of ¿lA¾e ÅappiºGÆ
Õ
some ¹Ases, due to t³lErAµce Çuild UÈ, A ÁHiM wi·· µ³T ÉE ¸ee¾E¾ tO ÊEt tHE
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STRucTionÕ Öf you STeaM ×eØ clean, oR hiT
ÙeM WiTh hiGhÑÈreSÁure WaTer,
yoÚ caº
ÛauÁe The ÜondinG To failÝ
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