lNever apply excessive pressure by a holding device which may cause distortion of a part
lApply pressure evenly to parts which have a press fit.
lApply even pressureto the bearing race that will be press fitted to the mating port
lUse correct tools and fixtures when servicing this tool. l Don’t damage “0” rings when servicing tool.
l Use Onlygenuine AROreplacement parts for this tool. When or- dering, specify par-tnumber, description, tool model number and serial number.
TWIN DRILL DISASSEMBLY
-Using 3mm hex wrench supplied with unit, loosen both adjust- ment screws (111)completely. IMPORTANT:Alternately unthread adjustment screws approximately 1/2 turn at a time or unthread screws simultaneously to prevent damaging the unit.
-Remove body and spindle assemblies from adapter (89).
-Remove retaining ring (93) and pull spindle (90) and components from adapter (89).
-Using retaining ring pliers, remove retaining ring (96) from gear
(97).
-Remove needle roller (98) and gear (97).
-Remove retaining ring (94) and lock ring (92) from spindle, -Bearings (95 and 91) ore press fit on driving spindle (90). -Remove “C”clip (99) from adjustment screws,
-Rotate spindle turret while pulling outward until o portion of spin- dle aligns with notch in body and removespindle assembly (108) from body.
-Remove oil reservoir (106).
-Remove nylon washer (105) by bending slightly. -Remove nylon washer (101) and gear (102).
-Bearings (103) and spacer(104) are loosepartsand will drop out, -DO NOTdisassemblespindle (108) unlessit ISnecessaryto replace
a port.
-To disassemble,using a flat bottomtype punch or similar tool and an arbor press, remove gear (113) from spindle (125). CARE SHOULDBETAKENTO REPLACEGEAR(113)IN THESAMEPOSI- TIONWHENREASSEMBLINGThe. gear is assembledwith teeth up on turret stamped “T”.The gear is assembled with teeth down on turret stomped “B”.
-Remove spindle (125) from sleeve (122) carefully, as six rollers
(120)are loose parts and will drop out. NOTE:Thrust race (121) IS press fit on spindle.
-Using a “C”type washer that properly fits spindle, press thrust race off spindle.
-Remove oil seal (124).
-If link bearing (114)and sleeve (122) are removed from turret, it will be necessaryto removethe foam strip (117)first. Lift one end of foam strip and pull so it slides thru notch under link bearing.
-Using a propersize punch and an arbor press,removelink bearing. -Press sleeve thru remaining distance in turret,
TWIN DRILL ASSEMBLY
-Pack bearingsand coat gearswith a goodgradeof bearinggrease when assembling. Saturateoil reservoirswith a good multigrade 10W/30 oil
-When fitting sleeve(122),it is Important that the slot in the sleeve lines up with the groove in the back face of the turret. Pushfoam strip (117)into the groovein the turret (widest side acrossgroove), The center of the strip should be under the sleeve and the two ends should meet at the point opposite the sleeve.
-Press the link bearing (114)overthe small end of the sleeve,keep- ing the 5mm hole in the link bearing aligned with the 5mm hole in the turret. TOmaintain alignment, use a 5mm pin inserted thru the bore in the link bearing and the turret.
-Assemble oil seal (124) to spindle.
-Assemble thrust race (121)to spindle, pressingan up to the shoul- der. Be certain thrust race is pressedon and squarely seated, or premature failure of the bearing may occur.
-Drop the thrust race into the bore of the sleeve assembled in the turret.
8
-Place a small amount of greaseon spindle and positionthe twenty needlerollers(123)betweenthe oil seal (124)and thrust race(121)
-Place a small amountof greaseon shoulderbetweenthe two thrust races and position the six rollers (120) on spindle.
-Slide spindle into sleeve,insuring foam strip is kept out of the way -Place a few drops of oil into sleeveand push spindle firmly down
into sleeve.
-Hold spindle in position and turn turret assembly over with gear end up.
-Apply a small amount of grease to needle cage (116)and slide cage overthe end of the spindle, into the bore of the link bearing
-Place washer (115)over spindle.
-Be certain gear is positioned correctly on spindle. Position with teeth up on turret stomped “T”.Positionwith teeth down on turret stamped “B”.IMPORTANT:When pressing gear on spindle, allow on end play of .001”.
-Press roll pins (107) into 1/8” diameter holes in turret. Assemble Set screws (109) to spindle.
-Insert a dummy adjustment screw (111),or a shaft of the same diameter,thru bodyfrom the back or adapterside of bodyto main- tain alignment of parts to be assembled into body.
-Assemble one nylon washer (101) over dummy screw and down into body.
--Assemble bearing (103), spacer (104) and other bearing (103) to gear (102).
--Assemble gear with bearings to dummy screw, with largest por- tion of gear going on screw first.
-Assemble one nylon washer (101) to screw.
-Assemble nylon washer (105) to screw, bending slightly to go thru hole in body.
-Assemble oil reservoir (106) into body and position holes for roll pins so they will align with roll pins of spindle when spindle is as- sembled to body.
-Assemble spindle (108) to body and screw, aligning roll pins with holes in oil reservoir and extended portion of spindle with notch in body.
-Assemble spring washer (110)and one nylon washer (101)to ad- justment screw (111).
-Assemble screw (111)to unit, while at the same time withdrawing dummy screw from unit.
-Assemble “C”clip to screw (111)to secure screw to unit. -Assemble bearings (91 and 95) to driving spindle (90) -Assemble gear (97) to driving spindle (go), aligning hole thru gear
with hole in spindle.
-Assemble needle roller (98) thru gear and spindle.
-Assemble retaining ring (96) over gear and needle roller.
-Assemble lack ring to spindle over bearing (95) and assemble retaining ring (94) to lock ring.
-Assemble driving spindle and components to adapter (89) and secure with retaining ring (93).
-Assemble the twin drill body assembly to the adapter and lock ring, alternately threading adjustmentscrews into lock ring, simi- lar to disassembly.
-Refer to “spindleadjustment”, page 3
GEARING DISASSEMBLY
-Using wrenches on flats of adopter (89) and ring gear (83), un- thread adapter from gearing.
-Using wrenches on flats of driving dog (88) and spindle nut (85), unthread and remove driving dog from spindle. Removespindle nut (85) also.
-Thread adjustment screws (6 and 7) all the way back and push the piston rod (48) all the way forward to expose wrench flats of motor housing (51) from the outer sleeve (41).
-Using wrenches on fiats of ring gear and motor housing, unthread gearing from motor housing
-If tool has double gearing, unthread ring gear (83) from ring gear
(81).
-Grasp ring gear in one hand and tap the threaded end of the spin- dle with a soft faced hammer; spindle and componentswill loos- en from ring gear.
-Remove bearing(s)and shaftsfrom spindleto removeplanetgears.
