ARO 8257-A Operator'S Manual Download | Manualshive

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Summary of Contents for 8257-A

Page 1: ...ALE N P T F REMOTE CONTROL PORTS INDEX PAGE MODEL IDENTIFICATION 2 GENERAL DESCRIPTION AND OPERATION 2 and 3 SET UP PROCEDURE 4 and 5 AIR AND LUBE REQUIREMENTS 6 MAINTENANCE 6 RECOMMENDED AIR INLET SYSTEM 7 REMOTE CONTROL START AND RETRACT 8 and 9 DISASSEMBLY AND REASSEMBLY 10 thru 16 ACCESSORIES 16 thru 18 SERVICE KITS 18 TROUBLE SHOOTING 19 DIMENSIONAL DATA 20 For parts and service information c...

Page 2: ...can best be attained by observing proper operating and maintenance proce dures Keep hands and clothing away from rotating end of tool and all other moving parts Eye protection should be worn at all times while operating power tools Disconnect air supply line to tool or shut off air supply line to tool and exhaust drain air line of compressed air BEFORE removing or installing a tap or other such de...

Page 3: ...e BUTTON BLEED the Button Bleed Valve from the F port at the rear of the VALVE marked R has beendepressedsufficiently to retract Valve Housing and remove the Pipe Plug Y227 2 L from the the unit See SET UP PROCEDURE PAGE 4 Should an F port at the top of the Valve Housing Install the Button EMERGENCY RETRACT be desired install an additional Bleed Valve 24130 in the F port at the top of the Valve Bu...

Page 4: ...ength SecureScrew with Jam Nut MODELS 8257 A ONLY After adjusting Adjustment Screw A to equal the total stroke length rotate Adjustment Screw B so the distance between the leading edge of the screw and the Button Bleed Valve 24130 is slightly greater than the Total Stroke Length Start the unit and let the unit advance until Adjustment Screw A contacts Stud then rotate Adjustment Screw B until scre...

Page 5: ...usted by loosening the Screws Yl57 44 in the Moun ting Bracket 40316 and sliding the Hydraulic Check to the desired position Retighten Screws Y157 44 before operating unit 3 Increase the air flow thru the Feed Control Valve by opening two 2 turns from closed This will allow the FEED RATE ADJUSTMENT 4 5 6 tap to advance rapidly until the Trip Bracket con tacts plunger of the Hydraulic Check TheHydr...

Page 6: ...meter S AT 100oF OIL IS COMPATIBLE AND GEAR GREASE SITY OF APPROX 750 MAINTENANCE DISCONNECT AIR SUPPLY from tool or shut off air supply line to tool and exhaust drain air line to tool of compressed air BEFORE performing service or maintenance to tool AIR TOOLS are madeof precision parts and should behandl ed with reasonablecarewhen servicing Excessivepressureex erted by a holding devicemay caused...

Page 7: ...per rate of air flow Shown above is a system for a single tool that will supply correct delivery Shown below is the same system in schematic form SEE SPECIAL NOTE PAGE 3 F FILTER R REGULATOR L LUBRICATOR F R L MODEL C28221 810 If two or three units are to be installed each unit should be supplied with a system like that shown below or use system like that above for each tool A 114 CAP LUBRICATOR M...

Page 8: ...n momentarily The unit will advance the drill to a preset depth and automatically retract to the initial position whereupon the unit will stop EMERGENCY RETRACT depress the emergency button momentarily This signal to the unit will shift the built in pressure operated valve commanding the unit to retract immediately to the initial position whereupon the unit will stop NOTE MANUAL START and EMERGENC...

Page 9: ...e supplies power directly to the feed piston in the tool TO START move lever forward The unit will advance to a pre set depth adjustment screw contacts stud on valve housing TO RETRACT move lever rearward back The unit will retract to the initial position EMERGENCY RETRACT the unit will retract at any time the lever is moved to the rearward back position The motor runs continuously as long as air ...

Page 10: ...32310 can beremov ed from Motor Housing after the removal of the Gearing Sec tion Seepage13for complete Motor disassembly To remove PISTON SECTION remove Cover 40313 Adapter 44883 Washer Y14 616 and Trip Bracket 41713 from end of Piston Rod Place Valve Housing in a suitable holding device with Outer Sleevein an upright position Using a strap type wrench on Outer Sleeve unthread and remove Outer Sl...

Page 11: ...n is removed After removal of Pin Jaw can be removed from spindle To remove Bevel Gear 39555 remove Hubs 31412 and Gears 39554 Assemble Spring 30852 into small hole provided in Spindle and assembleClutch Jaw 35209 to spindle aligning hole thru jaw with hole thru spindle and securewith Pin 31419 It may be necessaryto reach thru hole from opposite side using a small screwdriver to depress Spring 308...

Page 12: ...pacerand Bearing Y65 13 to drive end of Spindle AssembleGearsto Spindle and securewith Shafts Align notch in endsof Shafts with Spacer Assemble Spacer 37676 where applicable and Bearing 32325 to Spindle Assemble Jaw 35210 and Bearing 31068 to Bevel Gear 39555 and assembleto Ring Gear Assemble Key 31409 to Spindle and assembleSpindle and components to Ring Gear SPLINE GEAR 30901 BEARING 32325 BEVEL...

Page 13: ... Spindle Oil and assembleCylinder over Rotor aligning air inlets and Roll Pin of Cylinder with air inlet and hole in End Plate for Roll Pin AssembleBlades to Rotor and assembleEnd Plate 31158 with bearing to Rotor align ing Roll Pin and hole in End Plate Apply pressure to inside bearing race when assembling to Rotor Assemble Shield 38805 and Cap 38783 to End Plate 37956 Insure motor doesnot bind i...

Page 14: ...o groove in Piston Rod and assemble O Ring Y325 222 to groove around Motor Housing AssemblePiston Rod and Motor Housing in to Outer Sleevefrom end of sleevewith external threads exer cising care so asnot to damage O Ring Y325 20 when in serting Piston Rod thru Muffler Cap already assembledinto Sleeve Slot in Motor Housing must be aligned with Torque Pin 40312 l AssembleSeals 38860 to Piston 38867 ...

Page 15: ...ant when assembling _ SPOOL VALVE Assemble five 5 O Rings 41083 to Valve Body 40307 and assemble Valve Body into housing Assemble O Rings Y325 14 to Capsand assembleCaps to housing FEEDCONTROL VALVES Assemble O ring Y325 7 to needle valve 48441 1 and assemble needle valve to housing securing with plate 48440 l and screws Y211 1 CHECK VALVES Assemble O Ring Y325 2 to Check Valve and assembleCheck V...

Page 16: ...will be similar to that for Models 8257 A seepage 15 HOUSING ASSEMBLY 41302 l SCREW 2 Y211 1 PLATE48440 l SCREW PLUG 38863 NEEDLEVALVE 48441 1 VALVE HOUSING 41299 I PARTS MARKED THUS ARE INCLUDED IN SERVICE KIT NO 41325 SEE PAGE 18 ACCESSORIES I I PAGE 16OF20 ...

Page 17: ...ACCESSORIES ACCESSORIES 38875 l FOOT MOUNT ASS Y 38875 l FOOT MOUNT ASS Y M104 26 NOT INCLUDED IN FOOT MOUNT ASS Y 43311 LOCK NUT FORM 1681 2 PAGE 17 OF 20 ...

Page 18: ...r Sleeve and thus cause damage to the Air Cylinder 38866 contained inside the Outer Sleeveimpairing the function of the tool For external muffling usewith Muffler 43551 3 For closed exhaust system use with Hose Adapter 22827 for 1 2 I D exhaust hose SERVICE KIT NO 41325 CONSISTING OF PART PART QTY NO OESCRlPTION QTY NO DESCRIPTION PAGE 18OF20 4 30741 Blades 1 Y65 7 Bearing 1 Y325 222 O Ring 2 Y325...

Page 19: ...N VALVE HOUSING 5 REMOVE VALVE HOUSlNG FROM TOOL DISASSEMBLE BLOW ALL AIR PASSAGES CLEAR OF DEBRIS 1 INADEQUATE AIR 1 SUPPLY CHECK AIR SUPPLY FOR CORRECT REGULATOR AD JUSTMENT 2 CLOGGED AIR PASSAGE IN VALVE HOUSING 2 REMOVE VALVE HOUSING FROM TOOL DISASSEMBLE BLOW AIR PASSAGES CLEAR OF DEBRIS 1 PISTON NOT FULLY RETRACTED 1 INSURE PISTON IS NOT OBSTRUCTED AND IS RETURNED ALL THE WAY BACK 2 DAMAGED ...

Page 20: ...T 1 8 27 N P T F OPTIONAL RETURN PISTON INLET PORT 1 8 27 N P T F P 9 16 65ru OPTION CHUCK NO CAPACITY A B B 31427 0 1 4 1 15 16 49mm 1 3 32 28mm A 31432 10 5 16 1 15 16 49mm 1 3 32 28mm C 32060 5 16 5 8 2 7 16 62mm 1 15 32 37mm HAND TAP MANUAL BLEED BUTTON 1 t ...

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