Regulator Spring Replacement; Radio By-Pass Condensers; Regulator Armature Replacement - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
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FIGURE 9.13. CHECKING CURRENT
REGULATOR. LOAD METHOD
FIGURE 9·1... CHECKING CURRENT
LEAD METHOD. JUMPER LEAD METHOD
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and note current setting.
e. Adjust in same manner _ desc:ribed for the volta. replator (Filure 9-6).
9-36. Repair Section.
9-37. Regulotor Spring Replacelllent.
a. If it Decornes necessary to replace the spiral sprina on either the current or voltage regu-
lator unit. the new spring should first be hooked on the lower sprilll support alld then stretched
up until it can be hooked at the upper end. Stretch the sprilla only by means of a screwdriver
blade inserted between the turns (or in a similar marmer) - do nO( pry the spring uno place. as
this is likely to bend the sprina support. After ill.tllling a new spring. readjust the unit setting
as
already described.
9-38. Radio By.Pan C..,c1ense,..
a. The installatim of radio by-pass condensers on the field terminal of the regulator or ge!l-
erator will
caUSe
the reaulator contact points to burn and oxidize so tbat generator output will
be
reduced and a run down battery will result. If a condenser is fOWld canneeted to either of these
termina
Is.
discormect the condenser .nd clean the reaulator contact points as previously ~xplained.
9-39. Regulator Armotur. R.placelllent.
a. The armature may be replaced by drilling out the two rivets attaching the ann.ture to the
regulator frame. Support the frame to avoid hendinl, center-punch the rivet he.ds. and drill out
with a 3,32 inch drill. Attach the new armature with screws. teenuhers. and nuts supplied with
the service armature. Assemble screws down so that they
will not IroWld alainst cover.
ELECTRICAL
SYSTEM
ISSUED: 8/18/72
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