PS Magazine - FEBRUARY 1986
PS, The Preventative Maintenance Monthly
ISSUE 399
FEBRUARY 1986
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If the overspeed safety switch is ad-
justed wrong, the voltage Regulator on
the Hoba±t welder/ geneRatoR can ·be
damaged by an oveR²Revving engine.
To check it, override the goveRnoR³
If the saFty switch doesN't shut dowN
the eNgine at
2¾040
´PM or
68
cycles,
adJust it.
HeRe's how:
µ
´emove the scRew µo¶ the top Le¸
coRneR of the oveRspeed safetY switch.
µ
CaRe¹LLy puLL back the covER about
an iNch at the topº
µ
´e¶ove the paint »om the adjUst¼
¶eNt scRew. ½¾s on top of the squaRe
co¶poNent at the botto¿ LeÀt coRneR oÁ
the ciRcuit boardÂ
5¿
FEB ¿À
µ
Adjust Ãhe screw so the switch
shuts the engine down at
2ÁÂ0
´PM or
68
cyclesÄ ÅuÆ tÇe screw clockwise to
increase the ´PM or ÈeQuencyÉ
•N
»U. ¼½¾
Êou'lL need a smaLL scRewdRiveR, Like one in the jeweLerËs scRewdRiveR set,
NSN Ã120ÄÅ288Ä8739Æ
ÊouR authoRity ÌR the set is ApÍeNdix A of CTA
Ã0Ç970È
OR use the jeweleR's scRewdRiveR,
NSN Ã120ÄÉÇ180Ç0728Ê
in the s¿alL aRms
RepaiRmaN tool kitÎ
NSN Ã180Ä00Ä3Ã7Ë7770Ì
µ
Check the settiNg by oveRRiding the goveRNor at least thRee timesÂ
µ
When the scRew is pRopeRLy adjustedÏ Lock it in pLace with a dRop of paint
or vaRNish,
NSN Ã970ÄÉÄÃ83ÄÂ01Í
µ
´einstaLÐ the coveR aNd screwÑ
KEEp youR wiRiNg NEat aND
oRgaNizEd ÒÓÒ ÔSE EÐEctÕicaÐ
tiED owN StÕapS to ÖEEp EvERy×
thing iN pÐacEÒ
ØERE aÕE ÙhREE ÐENgthSÚ
FeB ¿À
NSN
5975¿00À07 4Á2072
5975Â00Ã570Á9598
5975Á00Ä156Á3253
ÎÏ
Length
Ð
1/2 iÅcHEs
10 1/4 IÅcHEs
13 1/4 iÅcÆEs
QTY
ÇÈÈ
ÇÈÈ
ÇÈÈ
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