SkyTrak 10054 Operation Manual - Manual (Page 173)

Ge nera lM ain ten anc e
171
Model 10054 Rev 3/02
Tu rn ingor Protr udingPins (Figure 122)
High lylo adedc hain, oper ating within adequa telubr ic atio nc ang enerate
abno rm alfr icti onal for ces betweenpi nan dl ink plate s. When chai ni s
allo we dt oope ra tein this cond ition, ap in or seri es ofpin s, can begi nt o
twis to ut ofa chai n,r es ult in gi nf ailu re .
Ex am in et hep in head riv ets to de ter mine if the “V EE ”flat sa res till in
cor rec tal ignme nt.Ch ain with rota ted/di splac edhea dsor abnor mal pin
prot ru sion sho uld be repl ac ed im me diat ely .
DONO Tatt empt tor epai rt hecha inb yweld ingor driv ingthe pin( s)
bac kint oth ec hain. On cethe pres sfi ti nteg rity between outside plat es
and pins has been alter ed, it ca nnot ber estor ed.
An yw ear patte rn onthe pin heads orth es ides ofth el ink plat es
indi ca tesmi salignm entin th es yste m.T his condi tion damag est he cha in
as wellas in cre as es fri cti onal load ing an ds hould bec orr ec ted .
Figu re 12 2
Dist ort ed or Bat te redLink Plat es
Dis tor ted orb attered link plate s( Figur e1 23)on al eaf ch ain can cau se
tigh tj oint sa ndp re ven tf lex in g.
Figu re 12 3
MM2060
VEEF latsCorrect
Alignmen t
Rotate dH ea ds
Abnormal Pin
Protrusion
MA9340
Distorted orBatte red
Lin kP la tes
General Maintenance
171 Model 10054 Rev 3/02
Turning or Protruding Pins (Figure 122)
Highly loaded chain, operating with inadequate lubrication can generate
abnormal frictional forces between pin and link plates. When chain is
allowed to operate in this condition, a pin or series of pins, can begin to
twist out of a chain, resulting in failure.
Examine the pin head rivets to determine if the “VEE” flats are still in
correct alignment. Chain with rotated/displaced heads or abnormal pin
protrusion should be replaced immediately.
DO NOT attempt to repair the chain by welding or driving the pin(s)
back into the chain. Once the press fit integrity between outside plates
and pins has been altered, it cannot be restored.
Any wear pattern on the pin heads or the sides of the link plates
indicates misalignment in the system. This condition damages the chain
as well as increases frictional loading and should be corrected.
Figure 122
Distorted or Battered Link Plates
Distorted or battered link plates (Figure 123) on a leaf chain can cause
tight joints and prevent flexing.
Figure 123
MM2060
VEE Flats Correct
Alignment
Rotated Heads
Abnormal Pin
Protrusion
MA9340
Distorted or Battered
Link Plates