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Snowblower

Model 7420, 8420 & 8420G

OperatOr and parts Manual

022012

FK331

Summary of Contents for 7420

Page 1: ...Snowblower Model 7420 8420 8420G Operator and Parts Manual 022012 FK331 ...

Page 2: ......

Page 3: ... Snowblower Parts List 20 Snowblower Gearbox Drawing and Parts List 23 PTO Drawing 24 PTO Parts List 25 Optional Bundles 26 1 75 x 5 Cylinder Assembly Drawings and Parts List 27 3 5 x 8 Cylinder Assembly Drawing and Parts List 28 Shipping Kit and Bundle Numbers 29 Warranty 30 Manufacturer s statement for technical reasons Buhler Industries Inc reserves the right to modify machinery design and spec...

Page 4: ...andard on all models A longer 36 PTO shaft is optional Also available is an optional Hydraulic Spout Control There is a shear bolt on the auger and on the PTO shaft to protect the machine from damage if a large object is picked up Any smaller objects in the snow will be thrown with it and could cause serious injury Do not allow anyone to stand behind the tractor or in the area of the discharged sn...

Page 5: ...ecommended precautions The safety alert symbol means ATTENTION BECOME ALERT YOUR SAFETY IS INVOLVED Caution The caution symbol indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices Warning The Warning Symbol indicates a potentially hazardous situation that if not avoided could result in death or ...

Page 6: ...except from the operator s station on the power unit Inspect and clean the working area before operating Keep hands feet clothing and hair away from moving parts Ensure bystanders are clear of the area before operating Start Up Safety Do not let inexperienced operators or children run this equipment Place all tractor and machine controls in neutral before starting Operate only with ROPS and seatbe...

Page 7: ... to stop before servicing adjusting repairing or unplugging Support the equipment with blocks or safety stands before working beneath it Follow good shop practices including keep service area clean and dry be sure electrical outlets and tools are properly grounded use adequate light for the job Use only tools jacks and hoists of sufficient capacity for the job Replace and secure all shields remove...

Page 8: ...safety signs ensure the installation area is clean and dry Decide on the exact position before you remove the backing paper Remove the smallest portion of the split backing paper and align over the specified area Carefully press in place Slowly peel back the remaining paper and smooth the remaining portion in place Small air pockets can be pierced with a pin and smoothed out Replace safety signs i...

Page 9: ...f the fan housing using 3 4 x 4 bolts 84336 lock washers 81701 and hex nuts 81700 Tube must be turned as shown in drawing Join the top of the hitch arms by bolting a 1 O D x 2 spacer 965808 between the top plates using a 3 4 x 4 bolt lock washer and hex nut through the lower outside holes Tighten all hardware 3 740 A Category 1 top link pin 965807 is fitted in the top holes of the hitch arm plates...

Page 10: ...pline end with a spring loaded locking collar The snowblower end has a clamp style yoke with a 3 8 keyway Slide the yoke onto the gearbox shaft with the 3 8 key supplied Lock the yoke in place with the 1 2 x 3 hex bolt and lock nut fitted through the groove in the gearbox shaft After tightening the bolt insert and tighten the 3 8 socket set screw supplied Caution Always check to see that both ends...

Page 11: ...cotter pins to hold them in place Hook the ends of the spring 960135 into these cotter pins to hold the shield down To mount the shield 965410 965409 on the 840G snowblower remove the two rear bolts at the top of the gearbox BU50506 Bolt the PTO shield to the gearbox plate using these same bolts Insert a 3 16 cotter pin in the hole in the shield and fold to lock in place Hook one end of the spring...

Page 12: ... shear bolts to protect the tractor and snowblower in case a large object enters the blower PTO shear bolt Two 5 16 x 1 Grade 5 Auger shear bolt 1 4 x 1 Grade 5 Shear bolts should be fastened with a lock nut or two jam nuts These bolts must be kept tight to prevent wear of the bolt and bolt holes 6 Never run PTO shaft over 600 rpm 7 ChainTension Slack on the lower side of the chain should be 3 8 t...

Page 13: ... a loose bearing collar always tighten collar in the direction of shaft rotation using a center punch or a similar tool 11 Shear Sprocket The shear sprocket 965827 should be checked at the beginning of every season to make sure it will spin freely With time the sprocket plate could corrode and seize which will not allow the shear bolt to break if something jams in the snowblower auger Clean to loo...

Page 14: ...Refilling 840G Gearbox with Oil If the gearbox requires refilling with oil because of repairs to the gearbox add oil to the level shown in the drawing Check the level regularly using the plug in the lid The correct level is even with the bottom of the plug ...

Page 15: ...2 17 0 313 5 16 10 13 19 25 27 36 0 375 3 8 20 27 33 45 45 63 0 438 7 16 30 42 53 72 75 100 0 5 1 2 45 61 80 110 115 155 0 563 9 16 70 95 115 155 165 220 0 625 5 8 95 128 160 215 220 305 75 3 4 165 225 290 390 400 540 0 875 7 8 170 230 420 570 650 880 1 225 345 630 850 970 1320 Torque figures indicated above are valid for non greased or non oiled threads and heads unless otherwise specified Theref...

Page 16: ...rade C Nuts NutTighteningTorque NutTighteningTorque lbs ft NM lbs ft NM CoarseThread 1 4 20 7 5 7 9 10 7 9 14 3 16 18 12 5 9 12 17 16 11 15 22 3 8 16 20 14 5 20 27 28 20 27 38 7 16 14 32 23 31 43 43 31 42 58 1 2 13 50 37 50 68 62 5 45 61 85 9 16 12 70 50 68 95 95 70 95 129 5 8 11 95 70 95 129 122 5 90 122 166 3 4 10 165 125 169 224 210 155 210 285 7 8 9 250 185 251 339 312 5 225 305 423 1 8 375 27...

Page 17: ...63 1 26 4 25 1 24 1 64 1 66 2 48 4 62 1 36 1 14 16 15 16 34 12 36 1 36 1 36 1 36 1 38 2 35 2 35 2 67 1 7 4 8 4 6 4 14 16 15 16 29 4 51 1 17 1 17 1 41 1 10 1 1 8 9 16 13 4 12 4 9 16 2 8 39 2 27 3 28 3 32 3 40 1 21 8 23 8 22 8 27 3 28 3 32 3 4 1 3 1 73 2 71 4 27 3 28 3 55 1 32 3 56 1 60 1 21 8 23 8 22 8 73 2 71 4 58 1 77 2 19 2 19 2 68 2 43 2 39 2 16 2 16 2 52 1 30 1 26 4 18 1 ...

Page 18: ...18 Parts 7420 8420 8420G Snowblower 8420G Snowblower Drawings 50 1 96 1 95 8 23 8 95 8 23 8 30 1 26 4 10 1 52 1 56 1 20 1 36 1 ...

Page 19: ...IS OPTIONAL ON THE 740 11 1 53 1 46 2 49 2 44 1 92 2 93 1 69 1 70 1 74 3 45 1 38 2 35 2 35 2 16 2 16 2 39 2 81 2 43 2 78 1 79 1 86 1 82 1 94 1 60 2 89 1 50 1 40 1 84 2 85 2 83 2 27 3 28 3 32 3 90 1 74 3 87 2 87 2 88 2 27 3 28 3 55 2 32 3 54 1 55 2 65 1 32 3 28 3 27 3 10 1 91 1 ...

Page 20: ...t 1 815901 84 Main Housing Weldment 1 815902 84G Main Housing Weldment 1 11 815903 74 84 Spout Weldment 1 12 815911 74 84 Spout Spacer 4 13 815912 74 84 Spout Clamp 4 14 81592 3 8 Hex Nut Pl 16 15 81593 Lock Washer 0 375 16 16 816131 3 4 Dia x 4 25 Lg Clev Pin 2 17 816132 0 50 Dia x 2 5 Bent Hitch Pin 1 18 816137 74 84 Fan Shaft 1 19 816151 Clevis Pin 0 88 Dia x 3 3 4 Lg 2 20 816169 74 Driveshaft ...

Page 21: ...Pin Clip 2 47 961637 Bearing Flange 62Ms 4 48 961675 Bearing Flange 72Ms 4 49 961876 1 2 x 1 1 2 Clev Pin Pl 2 50 965410 PTO Shld 14Ga 1 965409 84G Pto Shld 14Ga 1 51 965415 Dr Shft Guard 16Ga x 8 x 32 1 965404 Dr Shft Guard 16Ga x 8 x 37 1 52 965447 4 Blade Fan Weldt 1 53 965646 1 2 x 1 1 4 x 18 Adj Bar 1 54 965807 Top Link Pin Cat 1 5 Rc 1 55 965808 Top Link Pin Bushing Cat 1 2 2 56 965814 3 8 x...

Page 22: ...Manual 1 81 811826 7 8 x 5 Hex Bolt Pl 2 82 812364 Nut Lock Steel 0 500Nc Grb Pl 1 83 81523 1 4 x 1 2 Hex Bolt Pl 2 84 81544 1 4 Hex Nut Pl 2 85 81545 1 4 Lock Washer Pl 2 86 81627 1 2 x 3 Hex Bolt Pl 1 87 907315 Pin Weldt 0 88 x 7 75 Cat 1 2 2 88 907316 Pin Sleeve 7 64 W x 1 1 8 x 2 7 8 2 89 910426 Safety Chain All 1 90 960135 Pto Shld Sprg 661 1 91 961658 1 4 Cable Clamp Pl 1 92 965806 3 16 Cble...

Page 23: ...rbox Gasket 6 BU50508 Cross Shaft 7 BU50502 Pinion Shaft 8 BU50329 Bevel Gear 1 1 2 Bore 9 BU50331 Bevel Gear 1 3 8 Bore 10 BU50428 Staking Lock Nut 11 BU50444 Staking Lock Nut 12 BU50422 1 Oil Seal 3 Used 13 BU50415 Retainer Ring 4 Used 14 BU575902 Bearing Cup 2 Used 15 BU575901 Bearing Cone 2 Used 16 BU50429 Key 17 BU50210X Shim Set 18 BU575907 Bearing Cup 2 Used 19 BU575906 Bearing Cone 2 Used ...

Page 24: ...24 Parts 7420 8420 8420G Snowblower Snowblower PTO Drawing ...

Page 25: ... Repair Kit Collar Spring Ret Ring 2 Pawls 3 936249 Shear Assembly Repair Kit 3 8 x 1 2 Bolt Lube Blank 31 1 4 Balls 4 903296 Shear Bolt 5 16 x 1 Grade 5 Pack of 10 5 5 16 Lock Nut 6 936025 Repair Kit Option 906504 Extended Life Repair Kit Std 7 936270 Yoke Tube 8 936319 Bearing Snap Ring Kit 9 936272 Inner Shield 10 936273 Outer Shield 11 936274 Yoke Shaft 12 936269 ClampYoke 13 1 2 x 3 Hex Bolt ...

Page 26: ...t Lube Blank 31 1 4 Balls 4 903296 Shear Bolt 5 16 x 1 Grade 5 Pack of 10 5 812362 5 16 Lock Nut 6 936025 Repair Kit Option 906504 Extended Life Repair Kit Std 7 936281 Yoke Tube 8 936319 Bearing Snap Ring Kit 9 936282 Inner Shield 10 936283 Outer Shield 11 936284 Yoke Shaft 12 936269 ClampYoke 13 81627 1 2 x 3 Hex Bolt pl 14 812364 1 2 Lock Nut pl F9102 Hand Crank Kit 5 Hand Crank 7 965927 3 16 C...

Page 27: ... Optional Item Part Number Description 24930M Cylinder Complete X3913 Seal Kit F9117 Spout Deflector Cylinder Hose Kit 1 116984 Hose 3 8 x 120 c w Fittings 2 24930M Cylinder 1 75 Dia x 5 0 9 16 Orb 3 960913 Clevis Pin 0 500 x 1 813 Pl 4 9812430 Cotter Pin 0 125 x 1 00 Pl ...

Page 28: ...n 24803M Cylinder Complete X3906 Seal Kit F9116 Hydraulic Cylinder Hose Kit for Spout Swivel 1 103753 Cylinder Clevis Pin 1 x 4 Rb Fm 2 115043 Hose 1 2 x 78 1 2 mnpt x 3 4 morb 3 12779 Hair Pin Clip 9 4 24803M Cylinder 3 5 Dia x 8 0 Orb Port Parts 7420 8420 8420G Snowblower ...

Page 29: ...ssembly YC8420 84 Snowblower w Hydraulic Chute Control 4 Blade Fan 1 F0455C Body Assembly 1 F0463 Hitch YC8420G 84 Snowblower w Hydraulic Chute Control 4 Blade Fan 1 F0457C Body Assembly 1 F0463 Hitch Optional Bundle Numbers The following is a list of options available for the Kits listed above 1 F844 36 Optional Long PTO 1 F842 Standard PTO 1 FX9102 Hand Crank Kit 1 F0573 Hydraulic Chute Control ...

Page 30: ...quire replacement as part of normal maintenance Also Buckets and Bucket Tines carry no warranty Bent Spears carry no warranty Snowblower Fan Shafts carry no warranty Mower Blades carry no warranty Portable Auger Parts Have Two 2 Year Warranty Loader Parts Have Two 2 Year Warranty The purchaser is solely responsible for determining suitability of goods sold This warranty is expressly in lieu of all...

Page 31: ...Warranty Claim Forms with all requested information properly completed Warranty Claims must be submitted within a thirty 30 day period from date of failure repair Warranty Labor Any labor subject to warranty must be authorized by Buhler Industries Inc The labor rate for replacing defective parts where applicable will be credited at 100 of the dealer s posted shop rate Defective parts will receive ...

Page 32: ...r enlarge this limited warranty or its exclusions limitations and reservations Corrections of defects and improper workmanship in the manner and for the applicable time periods provided for herein shall constitute fulfillment of all responsibilities of Buhler Industries Inc to the purchaser and Buhler Industries Inc shall not be liable in negligence contract or on any other basis with respect to t...

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Page 34: ...stries Inc 1330 43rd Street NW Fargo ND USA 58102 Ph 701 282 7014 Fax 701 282 5865 Toll Free 888 524 1004 E mail info buhler com www farm king com Equipment shown is subject to change without notice 2010 BuhlerTrading Inc Printed in USA TSX BUI ...

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