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Powermatic 74A, Instruction Manual & Parts List

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Powermatic 74A Instruction Manual & Parts List Download Page 3

TABLE OF CONTENTS

Safety Rules ...................................................................................................................................... 4-5

Safety Decals ....................................................................................................................................... 6

Specifications ........................................................................................................................................ 6

Receiving the Saw ................................................................................................................................. 7

Installation & Assembly ......................................................................................................................... 7

Cast Iron Extensions ..................................................................................................................... 7
Mounting Blade ............................................................................................................................. 7
Rails & Accu-Fence ...................................................................................................................... 7
Splitter & Guard Assembly ............................................................................................................ 7
Mitre Gauge .................................................................................................................................. 7

Adjustments

Mitre Slot Alignment ...................................................................................................................... 8
Tilt Stop Adjustment ...................................................................................................................... 8
Fence Alignment ........................................................................................................................... 8
Mitre Gauge Adjustment ................................................................................................................ 8
Main Blade Belt Tensioning ........................................................................................................... 8
Scoring Blade Belt Tensioning ....................................................................................................... 9
Arbor & Arbor Bearing Removal ..................................................................................................... 9
Blade Raising Mechanism Adjustment .......................................................................................... 9
Splitter Adjustment ........................................................................................................................ 9
Scoring Blade Kerf Adjustment ...................................................................................................... 9
Insert Adjustment ........................................................................................................................ 10
Changing Saw Blades ................................................................................................................. 10
Tilting Mechanism Adjustment .................................................................................................... 10
Scoring Blade Alignment ............................................................................................................. 10

Maintenance ....................................................................................................................................... 11

Instructions and Procedures for Circular Saw Operations

General Instructions .................................................................................................................... 11
Rip Sawing .................................................................................................................................. 12
Resawing .................................................................................................................................... 13
Crosscutting ................................................................................................................................ 13
Bevel & Mitre Operations ............................................................................................................. 14

Trouble-Shooting ................................................................................................................................. 14

Feather Board Construction ................................................................................................................. 15
Filler Piece Construction ..................................................................................................................... 15
Push Stick & Push Block Construction ............................................................................................... 15

Parts Lists & Exploded Views:

Stand Assembly ..................................................................................................................... 16-17
Arbor ...................................................................................................................................... 18-20
Trunnion ................................................................................................................................. 22-23
Scoring Assembly .................................................................................................................. 24-25
Mitre Gauge Assembly ................................................................................................................ 21
Splitter & Guard Assembly ..................................................................................................... 26-27
Optional Table Extensions ........................................................................................................... 28

Electrical Schematics .................................................................................................................... 29-30

Summary of Contents for 74A

Page 1: ...Instruction Manual Parts List M 0460208 800 274 6848 www powermatic com TILTING ARBOR SCORING SAW Model 74A ...

Page 2: ...O PERSONS OR PROPERTY OR FOR INCIDENTAL CONTINGENT SPECIAL OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR PRODUCTS SOME STATES DO NOTALLOW THE EXCLU SION OR LIMITATION OF INCIDENTALOR CONSEQUENTIALDAMAGES SO THEABOVE LIMITATION OR EXCLUSION MAY NOTAPPLY TO YOU To take advantage of this warranty the product or part must be returned for examination postage prepaid to an Authorized Repair Stati...

Page 3: ...Splitter Adjustment 9 Scoring Blade KerfAdjustment 9 InsertAdjustment 10 Changing Saw Blades 10 Tilting Mechanism Adjustment 10 Scoring BladeAlignment 10 Maintenance 11 Instructions and Procedures for Circular Saw Operations General Instructions 11 Rip Sawing 12 Resawing 13 Crosscutting 13 Bevel Mitre Operations 14 Trouble Shooting 14 Feather Board Construction 15 Filler Piece Construction 15 Push...

Page 4: ...ools before starting to cut Make certain the work area is well lighted and that a proper exhaust system is used to minimize dust Powermatic recommends the use of anti skid floor strips on the floor area where the operator normally stands and that each machine s work area be marked off Provide adequate work space around the machine Operator position Maintain a balanced stance and keep your body und...

Page 5: ...thorized replacement parts and accessories other wise the table saw warranty and guarantee is null and void Misuse Do not use this Powermatic table saw for other than its intended use If used for other purposes Powermatic disclaims any real or implied warranty and holds itself harmless for any injury or damage which may result from that use If you are not thoroughly familiar with the operation of ...

Page 6: ...r 12 or 14 Blade Tilt left only 45o Maximum depth of cut with blade at 90o 4 1 8 Maximum depth of cut with blade at 45o 2 7 8 Standard Fence Surface 3 1 4 x 43 7 8 Maximum rip cut to right of blade standard fence and extensions 30 Maximum rip cut to right of bade standard fence and long extensions 50 Maximum Width of Cutoff 1 Stock 21 Maximum Width of Cutoff 5 1 8 Stock 17 Maximum Width of Dado 1 ...

Page 7: ...ghten all screws MOUNTING BLADE If your blade came uninstalled refer to Changing Saw Blades page 9 NOTE Blade must be mounted before making rail and fence adjustments RAILS ACCU FENCE Refer to the manual that accompanies the Accu Fence to assemble rails and fence at this point SPLITTER GUARD ASSEMBLY 1 Insert the grooved end of the splitter support shaft through slot in rear of saw and into hole i...

Page 8: ...TMENT Using a combination square check the 90 deg 0 and 45 deg stops as shown in Figure 6 Adjust stop positions if required using the stop screws as shown Check the pointer at 90 deg and readjust if required FIGURE 6 FENCE ALIGNMENT See Accu Fence manual MITRE GAUGE ADJUSTMENT The mitre gauge is equipped with individually adjust able index stops at 90 degrees and 45 degrees right and left The inde...

Page 9: ...ert slot and the splitter will have to be realigned NOTE The saw arm setscrew must be tight to avoid the possibility of movement which could cause the blade to hit the insert FIGURE 11 SPLITTER ALIGNMENT One of the most critical adjustments to help avoid kick backs is the splitter alignment It should be checked and readjusted if necessary after each blade change To align the splitter to the blade ...

Page 10: ...ighten the arbor nut securely Replace the table insert and reconnect the machine to power source FIGURE 14 TILTING MECHANISM ADJUSTMENT If binding occurs in the tilting mechanism clean off the sawdust and pitch accumulation and re grease If binding continues check the alignment and readust as required to center the worm with the worm gear segment on the trunnion If there is excessive play loosen c...

Page 11: ...e before complet ing the operation or not pushing the work piece all the way past the saw blade c Not using the splitter when ripping or not maintaining alignment of the splitter with the saw blade d Using a dull saw blade e Not maintaining alignment of the rip fence so that it tends to angle toward rather than away from the saw blade front to back NOTE Caution decal on guard and splitter as sembl...

Page 12: ... splitter is properly aligned When wood is cut along the grain the kerf tends to close and bind on the blade and kickbacks can occur NOTE A caution decal is installed on the guard and splitter assembly warning of the hazard of misalign ment see pg 8 for alignment instructions 3 The rip fence should be set for the width of the cut by using the scale on the front rail or by mea suring the distance b...

Page 13: ...ter than 6 Before starting a cut be sure the miter gauge is securely clamped at the desired angle Hold the workpiece firmly against the table and back against the miter gauge Always use the saw guard and splitter and make sure the splitter is properly aligned FIGURE 22 2 For 90 degree crosscutting most operators prefer to use the left hand miter gauge slot as shown in Figure 22 When using it in th...

Page 14: ...ety in avoiding a binding action between the saw blade and the table top When beveling with the miter gauge the workpiece must be held firmly to prevent creeping 2 Crosscuts made at an angle to the edge of the workpiece are called miters Set the miter gauge at the required angle lock the miter gauge and make the cut the same as a normal crosscut except the workpiece must be held extra firmly to pr...

Page 15: ...es Tilt or saw raising 1 Lock knob not released 1 Loosen lock knob handwheels difficult to turn 2 Worm and worm gear segment caked 2 Clean and re grease with sawdust and pitch 3 Worm and worm gear segment out of 3 Realign worm and worm alignment gear segment Motor overheats 1 Motor overloaded 1 Correct overload condition such as reducing the feed rate 2 Improper cooling of motor 2 Clean sawdust fr...

Page 16: ...or rip fence by the use of C clamps Drilled and tapped holes in the table top allow for the use of wing nuts and washers as a method of clamping Provide slots in the Feather Board for adjustments if this method of clamping is used Figure 24 shows a method of attaching and use of Feather Boards as a vertical comb The horizontal application is essentially the same except the attachment is to the tab...

Page 17: ... of saw blade 2195048 Accu Fence assembly only 2250113 Blade guard and splitter assembly 2328023 Table insert 2328024 Dado insert 2389002 Special cast iron extension wing kit 2402006 Accu Fence side panel replacement kit 2440020 Accu Fence rear lock assembly 2471015 Mitre gauge 6284600 Tenoning jig ...

Page 18: ...1 12 3604029 Saw Tilting Pointer 1 14 3684274 Scale 1 16 3797425 Table 1 18 6708012 Round Head Machine Screw 8 32 X 1 4 1 19 6746023 Hex Washer Head Screw 1 4 20 X 5 8 2 20 6714272 Socket Set Screw Nylok 1 4 20 x 1 4 Lg Pkg of 6 1 22 6716031 Hex Head Cap Screw 3 8 16 x 1 3 23 6746001 Pan Head Self Tapping Screw 6 X 1 4 2 24 6861300 Medium Lock Washer 3 8 3 25 6515001 Hex Nut 5 16 18 2 26 6716081 S...

Page 19: ...19 Stand Assembly Model 74A ...

Page 20: ... 1 21 6626031 Spring Pin 3 16 X 1 1 8 1 2271008 Handwheel Assembly Items 23 24 53 1 23 6350032 Handle Assembly 1 24 3271039 Handwheel 8 X 7 8 1 2440009 Raise Tilt Lock Assembly Items 25 26 1 25 3583011 Saw Raise Tilting Locking Pin 1 26 3406018 Black Phenolic Knob 382 801 1 27 6716087 Square Head Set Screw 3 8 16 X 2 0 1 29 3711005 Saw Arm Pivot Shaft 1 30 6526005 Jam Nut 1 8 R H 1 32 3090012 Dust...

Page 21: ...cription Quantity 6472504 Motor 7 5 HP 3 Ph 1 6470506 Scoring Motor 1 2 HP 3 Ph 230 460V 1 6470505 Scoring Motor 1 2 HP 1 Ph 230V 1 6472327 Motor 5 HP 3 Ph 200V 1 55 6716101 Socket Set Screw 3 8 16 x 1 1 56 6760078 Socket Set Screw 10 32 x 3 8 1 ...

Page 22: ...22 Arbor Model 74A ...

Page 23: ...1 3 3604035 Mitre Gauge Pointer 1 4 3761001 Stop Pin 1 5 3841202 Mitre Gauge Bar Washer 1 6 6506001 Hex Nut 6 32 3 7 6623012 Dowel Pin 1 4 X 1 1 9 6706015 Fill Head Machine Screw 6 32 X 5 8 3 11 6714053 Flat Head Cap Screw 1 4 20 X 3 8 1 12 6861101 Flat Plain Washer 1 4 1 13 3695221 Locking Screw 1 4 X 3 3 8 1 14 3268050 Mitre Gauge Handle Knob 1 15 3055435 Pointer Block 1 ...

Page 24: ...ing 1 16 3810023 Front Rear Trunnion 2 17 3700090 Splitter Support Shaft 1 1 18 6715039 Hex Head Cap Screw 5 16 18 X 1 3 4 2 19 3750010 Splitter 1 20 6716082 Square Head Set Screw 3 8 16 X 2 1 2 Splitter 1 21 6716031 Hex Head Cap Screw 3 8 16 X 1 45 deg Stop 1 22 6516009 Hex Jam Nut 3 8 16 2 23 3711005 Saw Arm Pivot Shaft 1 24 6578003 Hex Flexloc Self Locking Nut 1 1 8 12 1 25 6670092 External Ret...

Page 25: ...25 Trunnion Model 74A ...

Page 26: ...3690100 Adjustment Screw Assembly Raise Scoring Blade 1 18 6064000 Bearing 603 1 4 1 19 3406017 Knob 1 21 6714004 Knurl Socket Set Screw 1 4 20 X 1 4 4 20 3598049 Protector Plug 4 22 3063302 Motor Plate Mounting Bracket 1 23 6716032 Hex Head Cap Screw 3 8 16 x 1 1 2 3 25 6861200 Lock Washer 5 16 3 26 3064459 Motor Plate Bracket 1 27 6720038 Socket Head Shoulder Screw 750 Dia x 2 1 4 Lg Shoulder 1 ...

Page 27: ...27 Scoring Assembly Model 74A ...

Page 28: ...k 1 15 6710030 Flat Head Machine Screw 10 24 X 1 4 2 16 6626032 Spring Pin 3 16 X 1 1 4 1 17 6626049 Spring Pin 3 8 X 2 1 18 3250111 Blade Guard 2 19 3025073 PivotArm 4 20 6714192 Flat Head Socket Screw 1 4 20 X 7 8 8 21 3070108 Pivot Bushing 8 22 3838015 Pivot Washer 8 23 6514012 Flex Lock Nut Sh 1 4 20 8 2787008 10 Rear Splitter SupportAssembly Items 24 thru 32 1 24 3700090 Unthread Splitter Sup...

Page 29: ...29 Splitter Guard Assembly Model 74A ...

Page 30: ... 3186006 25 Round End Extension Table 1 3 2423001 Inner Weldment LegAssembly 1 4 3186009 Outer Leg Extension 1 5 6716031 Hex Head Screw 3 8 16 X 1 1 6 6715036 Hex Head Screw 5 16 18 X 5 8 2 7 6515001 Hex Steel Nut 5 16 18 2 8 6861200 Lock Washer 5 16 2 9 6861201 Flat Washer 5 16 2 PARTS LIST Optional Table Extensions Model 74A ...

Page 31: ...starter overload motor size contactor relay 3HP 230V 6816266 6659052 5HP 230V 6816269 6659053 5HP 230V 6816266 6659051 5HP 460V 6816262 6659049 7 5 230V 6816268 6659053 7 5 460V 6816265 6659050 Three Phase Controls MAGNETIC STARTERS Single Phase Controls ...

Page 32: ...32 ELECTRICAL SCHEMATIC 74A Scoring Saw THREE PHASE ...

Page 33: ...33 ...

Page 34: ...34 ...

Page 35: ...d Serial Number of your machine available when you call will allow us to serve you quickly and accurately Locating the stock number of the part s required from your parts manual will also expedite your order Phone No 800 274 6848 Fax No 800 274 6840 If you are calling from Canada please call 800 238 4746 E mail powermatic wmhtoolgroup com Website www powermatic com ...

Page 36: ...C WMH Tool Group P O Box 1349 Auburn WA 98071 1349 Phone 800 274 6848 Fax 800 274 6840 E mail powermatic wmhtoolgroup com Website www powermatic com POWERMATIC ALL RIGHTS RESERVED 06 02 ...

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