(3) Replacement,See f i g u r e 4 - 1 4 andreplacethe selector switch (23) or (36) as follows:@) Removal.1. Remove the switch knob ( 1 8 o r 2 5 , f i g .4 - 1 4 ) and escutcheon plate (20) or (27).2. Remove the screws (21) or (28)whichsecure selector switch (23) or (36)to panel (56).3. On voltage selector switch (36) alsoremove screw (30) and nut (31) which secure rear ofvoltage selector switch [36) to the switch bracket (35).4. Tag all leads to switch andremoveleads from selector switc!l (23) or (36).5. Remove selector switch (23) or (36).(b)installation.1. Reconnect wires as tagged, and re-move tags.2. Remount selector switches ( 2 3 a n d3 6 , f i g . 4 - 1 4 ) escutcheo,l. plate (20) or (2’7),and knob(18) or (25) using removal steps in reverse order.b. Load Reject Switch.-—(1) Inspection.Remove cover ( 9 , f i g . 4 - 1 4 )and inspect load reject switch (40)for positive actionbetween positions.Check for loose connections.Check bodv of switch for cracks, breaks, corrosion,andother damage.(2) Testing. To test the load reject switch( 4 0 , f i g . 4 - 1 4 ) , use a multimeterand make continuitycheck of switch positions, closed in automatic (zeroohms)and open in manual (imrinity) positions.(3) Replacement.To replace load rejectswitch ( 4 0 , f i g . 4 - 1 4 ) , remove nut (37), washer (38),and nut (39)tagging leads before removing lead reje@switch. Install in reverse orderof removal.c.Fan and Motor Assembly.—(1) Inspection. Remove cover ( 9 , f i g . 4 - 1 4 )and inspec-t-rnciuntin~grommets ( 5 , f i g . 4 - 1 4 ) ior de-terioration and looseness, wiring leads for fraying,and check fan brushesforwear.Inspect fan blade(2) fan guard ( 4 3 , f i g . 4 - 1 4 ) , and air outlet for foreignmaterial, and fan blade for damage and looseness.Inspect motor assembly for unusual noises,signsofoverheating and other damage.(2)Testing. During’ load bank testing ( p a r a4 - 4 2 b . ) o%-scrvti-fhroughfan ward that fan bladerotates clockwise with air flow as shown on f i g u r e4 - 1 5 .(3) Replacement. To replace fan blade (2 ,f i g . 4 - 1 5 ) , remove tan guard ( 4 3 , f i g . 4 - 1 4 ) by re-moving nut (41)and screw (42). Loo.?en setscrews( 1 , f i g . 4 - 1 5 ) securing fan blade (2) and remcweblade from motor shaft. To replace grommets ( 5 ,f i g . 4 - 1 5 ) , renlove fan and motor assembly ( 4 6 , f i g .4 - 4 24 - 1 4 ) by removing nut (44) andscrew (45) andthenremove screw ( 3 , f i g . 4 - 1 5 ) andwasher ( 4 , f i g . 4 - 1 5 ) .fnstall in reverse order of removal.d. Circuit Breaker (Over Temperature ResetSwi?ch.(1)Inspection.Remove cover ( 9 , f i g . 4 - 1 4 )and inspect the circuit breaker (48) for positive actionbetween positions, loose mounting, loose electricalconnections, andother damage,(2) Testing.Test the circuit breakers asfollows:bre&er (~)Tag leads and remove from circuit(b)Using multimeter, verify continuity(closed co=tacts) of circuit breaker in the ON position.(c) Place circuit breaker in OFFposition andverify no ~ontinuity (open contacts).(cJ) R?connect leads andremove tags.(3) Replacement.To replace the circuitbreaker ( 4 8 , f i g . 4 - 1 4 ) , remove screws (47) andtagleads before removing circuit breaker. fnstall inreverse order of removal.e.Indicating Light.(1) Inspection.Remove cover ( 9 , f i g . 4 - 1 4 )and inspect indicating light for 100SC m~unting, looseconnections, corrosion and dam>~e.Inspect lens andlamp for looseness and damage.(2) Testing.During load bank testing( p a r a4 - 4 2 b . ) , observe that indicating light lights.(3) Replacement.To replace indicating light( 4 9 t h r o u g h 5 4 , f i g . 4 - 1 4 ) , remove lens (49),bulb(50),nut (51), washer (52), and nut (53), tagging leads be-fore removing base (54).Install in reverse order ofremoval.4 - 4 5 . L o a d R e j e c t R e l a y .a. Inspection.Remove cover ( 9 , f i g . 4 - 1 4 ) , andins~ect load reject relay for loose mounting, damage,and wiring connections for looseness.b. Testing.Higher level of maintenanceisreq~ired.c.Replacement.Higher level of maintenanceisreq~ired.4 - 4 6 . T e r m i n a l B o a r d .a.Impection.fnspect the terminal board ( 6 4 ,f i g . 4 - 1 4 ) f o r loose nl&nting, loose electrical con-nectioiis, cracks, breaks, and other damage.b. Replace, []cmt.To repIace the terminal board( 6 4 f i g . 4 - 1 4 ) , r e m o v e nut (57), screw (58), washer
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