Craftsman 4 Gallon Manual

							  
NOTE 
Iftheoverloadprotectorshutsthemotorofffre- 
quently,checkforapossiblevoltageproblem. 
Lowvoltagecanalsobesuspectedwhen: 
!.themotordoesnotgetuptofultpoweror 
speed; 
2.fusesblowoutwhenthemotorisstarted. 
3.lightsdimwhenmotorisstarted,andremain 
dimwhileitisrunning, 
Belt-Replacement 
tWARNING 
SERIOUSINJURYORDAMAGEMAY 
OCCURIFPARTSOFTHEBODYORLOOSE 
ITEMSGETCAUGHTINMOVINGPARTS. 
NEVEROPERATETHEOUTFITWITHTHE 
BELTGUARDREMOVED.THEBELTGUARD 
SHOULDBEREMOVEDONLYWHENTHE 
COMPRESSORISUNPLUGGED. 
ToReplaceBelt: 
1.Unplugcompressor. 
2.Removethefrontofthebeltguardbydisengagingthe 
snaps,Insertaflatbladedscrewdriverateachsnap 
locationandprythebeltguardapart. 3.Themotorismountedonaspecialbase.Byloosening 
thewingnutatthemotorholddownplate,themotor 
canbetiltedtoallowforeasyremovalofthebelt. 
4.Removebeltandreplace. 
NOTE 
Thebeltmustbecenteredoverthegrooveson 
theflywheelandmotorpulley. 
5.Tightenthewingnutuntilitmakescontactwiththe 
washerplusoneadditionalturn. 
6.Replacethefrontofthebeltguard. 
ToAdjustBeltTension: 
1.Tightenthewingnutuntilitcontactsthewasher,plus 
onemoreturn. 
PulleyandFlywheel-Alignment 
Thecompressorflywheelandmotorpulleygrooves 
mustbein-line(inthesameplane)within1/32toassure 
beltalignmentwithingrooves.Tocheckalignment,dis- 
connectelectricalpowerandremovethebeltguard. 
Placeastraightedgeagainsttheoutsideoftheflywheel 
andmeasurethedistancefromittothenearestgroove. 
Alignmentisachievedwhentheotherendofthestraight- 
edgeiswithin1/32ofthemeasureddimensionatthe 
pulleygroves. 
STORAGE 
BeforeYouStoreTheAirCompressor: 
1.ReviewtheMaintenancesectiononthepreceding 
pagesandperformmaintenanceasnecessary.Drain 
th,ewaterfromtheairtank. 
2.SettheOFF/AUTOswitchtotheOFFposition,and 
unplugtheunit, 3.Removetheairtooloraccessory. 
4.Protecttheelectricalcordandairhosefromdamage 
(suchasbeingsteppedonorrunover).Windthem 
looselyaroundtheoutfithandle, 
5.Storethecompressorinacleananddrylocation. 
TROUBLESHOOTINGGUIDE 
WARNING 
PERFORMINGREPAIRSMAYEXPOSEVOLTAGESOURCES,MOVINGPARTS,ORCOM- 
PRESSEDAIRSOURCES.PERSONALINJURYMAYOCCUR.PRIORTOATTEMPTINGANY 
REPAIRSTHECOMPRESSORMUSTBEUNPLUGGEDANDTANKPRESSURERELIEVED. 
NEVEROPERATETHEUNITWITHTHEBELTGUARDREMOVED. 
PROBLEMCAUSECORRECTION 
Excessivetankpressure- 
safetyvalvepopsoff. Pressureswitchdoesnotshutoff 
motorwhencompressorreaches 
cut-outpressure. MovethepressureswitchlevertotheOFFposi- 
tion.Iftheoutfitdoesntshutoff,andtheelectrical 
contactsareweldedtogether,replacethepressure 
switch. 
Ifthecontactsaregood,checktoseeifthepinir 
thebottomofthepressurereliefvalveisstuck.Ifi 
doesnotmovefreely,replacethevalve= 
Pressureswitchcut-outtooReturntheoutfittotheSearsServiceCentert( 
high.checkandadjustorreplaceswitch. 
AirleaksatfittingsTubefittingsarenottightenough.Tightenfittingswhereaircanbeheardescaping 
Checkfittingsundersoapywatersolution.DC 
NOTOVER-TIGHTEN.  
						

							  
TROUBLESHOOTINGGUIDE(continued) 
ROBLEMCAUSECORRECTION 
irleaksatcheckvalveDefectiveordirtycheckvalve.Adefectivecheckvalveresultsinaconstantair 
leakatthepressurereleasevalvewhenthereis 
pressureinthetankandthecompressorisshutoff. 
Removeandcleanorreplacecheckvalve.DO 
NOTOVER-TIGHTEN. 
irleaksatpressureDefectivepressureswitchRemoveandreplacethereleasevalve. 
,vitchreleasevalvereleasevalve. 
Defectivecheckvalve. Adefectivecheckvalveresultsinaconstantair 
leakatthepressurereleasevalvewhenthereis 
pressureinthetankandthecompressorisshutoff. 
Removeandcleanorreplacecheckvalve,DO 
NOTOVER-TIGHTEN. 
,irleaksinairtank Defectiveairtank. 
Airtankmustbereplaced.Donotrepairtheleak. 
,WARNING 
DONOTDRILLINTO,WELD,OROTHER- 
WISEMODIFYAIRTANKORITWILL 
WEAKEN. 
;ompressorisnotsupplying 
noughairtooperateacces- 
cries. 
:nockingnoise Prolongedexcessiveuseofair.Decreaseamountofairusage. 
Compressorisnotlargeenough 
forairrequirement. 
Restrictedairintakefilter. 
Holeinhose. 
CheckValverestricted. 
Airleaks. 
Defectivecheckvalve. Checktheaccessoryairrequirement.Ifitis 
higherthantheCFMorpressuresuppliedbyyour 
aircompressor,youneedalargercompressor. 
Cleanorreplaceairintakefilter. 
Checkandreplaceifrequired. 
Removeandcleanorreplace. 
TightenFittings.(SeeAirLeaksSectionsof 
TroubleshootingGuide.) 
Removeandcleanorreplace, 
Loosepulley. 
Tightenpulleysetscrewto70-80in.tbs. 
Lowoillevel. 
Maintainprescribedoillevel,Addoil. 
Looseflywheel. Tightenscrewto15-20ft.Ibs. 
Loosecompressormounting 
screws. Checkscrews.Tightenasrequiredto15-20 
ft.Ibs. 
Loosebelt. 
Tightenwingnutonmotormountuntilitcontacts 
thewasher,plusonemoreturn. 
Carbonbuildup. Removetheheadandvalveplate.Cleanthevalve 
plateandthetopofthepiston.(Besurecarbon 
doesnotfallintothecylinder.)Reassembleusing 
newgasketsandtorquescrews,25to30ft.Ibs, 
kitleaksfromsafetyvalvePossibledefectinsafetyvalveOperatesafetyvalvemanuallybypullingonring.If 
valvestillleaks,itshouldbereplaced.  
						

							  
TROUBLESHOOTINGGUIDE(continued) 
PROBLEMCAUSE 
ExcessivebeltwearLoosebelt. CORRECTION 
Adjusttension.SeeBeltReplacement,pg.11. 
Adjusttension.SeeBeltReplacement,pg.11. 
Checkforwornkeywayorpulleybore.Also 
checkforbentmotorshaft.Replacepartsif 
necessary.  Tightbelt. 
Loosepulley. 
Pulleymisalignment.Motorpulleyandflywheelgroovesmustbeinline 
within1/32. 
SquealingsoundLoosebelt.Adjusttension.SeeBeltReplacement,pg.11. 
Thereisnooilinthecompressor.Addoil. 
MotorwillnotrunMotoroverloadprotectionswitchLetmotorcootoffandresetswitchbypressingth_ 
hastripped,redbuttonlocatedontheendofthemotor. 
Tankpressureexceedspressure 
switchcut-inpressure. 
Wronggaugewireorlengthof 
extensioncord. 
Checkvalvestuckopen. 
Looseelectricalconnections. Motorwillstartautomaticallywhentankpressur_ 
dropsbelowcut-inpressureofpressureswitch. 
Checkforpropergaugewireandcordlength. 
Removeandcleanorreplace.DONOTOVER 
TIGHTEN. 
Unplugthecompressor.Checkwiringconnec- 
tioninsidepressureswitchandmotorterminal 
boxarea. 
Possibledefectivecapacitor. 
Paintoninternalmotorparts. ReturntoSearsServiceCenterforinspectiono 
replacementifnecessary, 
HavemotorcheckedataSearsServiceCenter. 
Donotoperatecompressorinornearapaint 
sprayarea. 
Possibledefectivemotor. 
Fuseblown,circuitbreaker 
tripped. 
Pressurereleasevalveonpres- 
sureswitchhasnotunloaded 
headpressure. HavecheckedatalocalSearsServiceCenter. 
t.Checkfuseboxforblownfuseandreplacei 
necessary.Re-setcircuitbreaker.Donotuse 
fuseorcircuitbreakerwithhigherratingthal 
thatspecifiedforyourparticularbranchcircuit 
2.Checkforproperfuse;onlyBussFusetronTyp{ 
Tfusesareacceptable. 
3.Checkforlowvoltageconditionsand/orprope 
extensioncord. 
4.Removecheckvalveandcleanorreplaceifiti 
stuckopenorclosed. 
5.Disconnecttheotherelectricalappliancesfror 
circuitoroperatethecompressoronitsow 
branchcircuit. 
Bleedthelinebypushingtheleveronthepressur 
switchtotheOFFposition;ifvalvedoesn( 
open,replaceit.  
						

							  
AIRCOMPRESSORDIAGRAM 
(viewfromback) 
54 
53 
49 
\ 
51 
50 
48A48 
46 52 
\ 17 
2728A 25 
36A 
35 
37(ModelNo,shownhere) 
40 
(Seepg.B,Step2forproper 
wheelplacementandassembly)  
						

							  
COMPRESSORPUMPDIAGRAM 
58 
87 
!86 6160 
73 
74 
75 
8076 
...(oilfillplug) 
(oildrainplug)  
						

							  
PARTLIST(continued) 
51SS-391 
52C-BT-223 
53SSF-986 
54LA-1951 
55SSF-6627 
56CAC-293 
57SSF-955 
58SS-8553 
59SSP-9401 
V60CAC-291 
•61265-25 
•62SSF-9821 
63CAC-294 
•64265-196 
65CAC-259 
l/66CAC-54-1 
•lk67CAC-56 
468CAC-58 
169CAC-57 
70CAC-55 
71265-19 
72CAC-207 
73265-410 
74SSF-927 
75CAC-51 
76265-41 
77SSP-1413 
78SSF-925 
79265-3 
v50265-16 
81CAC-373 
82265-23 
l/83265-13 
84265-9 
85265-2 
86SSN-1014-ZN 
87STD523107 
V88265-111 
=/89265-6 
90CAC-4284 
91SS-3222-CD 
92CAC-366 Setscrew 
Poiy-V-Be|t,39long 
Self-tappingscrew(2used) 
Label 
Stud3/8x16bothends(2used) 
Head 
Screw,315-16x%1/2(4used) 
Adapter 
Adapter 
Headgasket 
Intakeflappervalve-squarecornerst_ 
(2usedonhead) 
Screw#5-40×1/4(8used) 
Restrictorplate(2used) 
Exhaustflappervalve-beveledcorners 
(2usedonvalveplate) 
FValveplate 
Valveplategasket 
Compressionring(4used) 
Oilring(4used) 
Oilringexpander(2used) 
Piston(2used) 
Pistonpin(2used) 
Pistonpinplug(4used) 
Connectingrodassembly(2used)includestwoSSF-927screws. 
Screw,1/4-20x1-1/8(4used) 
Crankcaseandcylinder 
Needlebearing 
Pipeplug(2used) 
Screw,1/4-20x7/8(12used) 
Base 
Basegasket 
Crankshaft 
Needlebearing 
Endplategasket 
EndPlate 
Flywheel 
Bellevillewasher 
Capscrew 
Seal 
Ventfilter 
Shut-offvalve 
Pipeplug 
Manifold 
9-16269 
9-16163 
SI-30-14-7-B NOTILLUSTRATED 
Airchuck 
Airhoseassembly(1/4LD.x15) 
OwnersManual 
•_pKeyNoo87,68and69,onlyavailableinRingKitKK-4313 
vrKeyNo,6,50,66,80,83,88and89,availableasindividualpartsandpartofGasketKitKK-43!2-2, 
•KeyNo,61,62and64,onlyavailableinValveKitKK-4275o  
						

							  
PARTSLIST 
KEY 
NO.PARTNUMBER 
1CAC-322 
2CAC-323 
3SSF-8113-ZN 
4CAC-327 
5CAC-4003-1 
69-16279 
7265-18 
8SSF-935 
9LA-1779 
10STD575051_ 
11STD575050q 
12CAC-317 
13TIA-4150 
14C-GA-345 
15STD575026 
16STD575025 
17CAC-387 
18CAC-1012 
19SSW-7385 
20H-2099 
21CAC-1011 
22CAC-1013 
23SSN-56-ZN 
24SSN-1619-ZN 
25SUDL-415-1 
26SSW-7367 
27LA-1531-1 
28CAC-4221-1 
28AKK-4315 
29-CAC-4215-1 
30SS-1287 
31CAC-437 
32SSF-928 
33STD-541631- 
34LA-1848-1 
35CAC-320 
36LA-1814 
36ALA-1978 
37LA-1952-1 
38CAC-1059 
38ACAC-399 
39SUDL-6=I 
40CAC-66 
41CAC-4293 
42STD541437 
43SS-2707 
44NotAvailable 
45TA-4072 
46LA-1811-1 
47CAC-287 
48MO-6436 
48ALA-1946-1 
49STD580104 
50C=PU-2861 DESCRIPTION 
Beltguard,outside 
Beltguard,inside 
Locknut 
Bracket 
Compressorpumpassembly 
includesKeyNo.55through89inclusive. 
Intakefilter-packageof2(tused) 
Filterretainer 
Screw,#8-32x3/8(2used) 
HotSurfaceLabel(2used) 
Ferrule(2usedfor1/2O.D.Tube) 
Nut(2usedfor1/2O.D.Tube) 
Outlettube 
Safetyvalve 
Pressuregauge 
Ferrule(2usedfor1/4O.D.Tube) 
Nut(2usedfor1/4O.D.Tube) 
Pressurereleasetube 
Holddownplate 
StrainRelief 
Adapter 
Eiastomerspring 
Holddownscrew 
FlatWasher 
LockWasher 
Cordassembly 
Strainrelief 
Label 
Pressureswitch 
Pressurereleasevalveandmountingnut(Includedwith#28) 
Motorcordassembly 
Nipple 
Checkvalve 
Screw5/16-18x7/8(4used) 
Wingnut 
Warninglabel 
Handle 
Periodicmaintenancelabet 
Draintanklabel 
Specificationlabel 
RetainingClip(2used) 
PlasticSleeve 
Rubberfootstrip 
Shoulderbolt(2used) 
8wheel(2used) 
Locknut(2used) 
Draincock 
Codenumberlabel 
Airtank,20gallonASME 
SearsCraftsmanlabel 
Pivotpin 
Motor,5HP 
HPlabel 
Motorshaftkey(3/16x3/16x11/4_ 
Motorpulley