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Kubota B2781B, Operator And Parts Manual

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Kubota B2781B Operator And Parts Manual Download Page 20

OPERATION 

OM 0377SB-A 

18

Reduction Chain Tension Adjustment 

(Figures 8a-8b) 

1. Figure 8a: 

Remove chain cover 

(item 1). 

2. Figure 8a-8b: 

Loosen the four 

nuts securing the reduction box 
(items 2) to the snowblower.  

3. Figure 8a: 

Tighten the chain 

using the tightening bolt (item 3) 
on left hand side of fan housing.  

4. Figure 8b: 

Leave approximately 

1/16" deflection in the bottom 
span of chain.  

5. 

Tighten the four nuts securing 
reduction box to the snowblower. 
Install the chain cover. 

 
 
 

IMPORTANT

:

   

To avoid damage 

to the snowblower, retorque all 
bolts after the first 10 hours of 
operation.

 

 

Figure 8a 

Figure 8b 

Summary of Contents for B2781B

Page 1: ...700 06538 Rev3 12 15 O OP PE ER RA AT TO OR R S S A AN ND D P PA AR RT TS S M MA AN NU UA AL L B B2 27 78 81 1B B 5 51 1 S SN NO OW WB BL LO OW WE ER R B B2 27 78 82 2B B 6 63 3 S SN NO OW WB BL LO OW WE ER R SERIAL NO 21503940 AND UP ...

Page 2: ...ss or implied including but not limited to warranties of merchantability and fitness for a particular purpose and Kubota shall not be liable for any damages whether compensatory direct indirect incidental special or consequential arising out of or in connection with the use of this publication or the information therein The Product s described in this Publication are designed and manufactured only...

Page 3: ...ousing depth 7 0 in 178 mm 7 0 in 178 mm Auger diameter 13 75 in 349 mm 13 75 in 349 mm Auger height 16 0 in 406 mm 16 0 in 406 mm Auger clearance from ground 2 25 in 57 mm 2 25 in 57 mm Lift height above ground level Operating position 7 25 in 184 mm Transport position 10 5 in 267 mm Operating position 7 25 in 184 mm Transport position 10 5 in 267 mm DRIVE SYSTEM Number of phases 2 2 Primary Driv...

Page 4: ...ssembly 11 Chute Installation 11 Rotation worm support Installation 11 Manual Rotation Installation 12 Manual Rotation Installation B2320 B2620 B2920 B2301 B2601 Tractors 13 Attaching Snowblower to Tractor 14 Detaching Snowblower from Tractor 15 OPERATION 16 General Preparation 16 Operating Controls 16 Manual Chute Rotation 16 Electric Deflector 16 P T O Operation 16 Hydraulic Chute Rotation 16 Up...

Page 5: ...CE 20 Maintenance 20 Shear Bolts 20 Auger Repositioning 20 Gearbox 21 Oil Level Oil Filling 21 Oil Change 21 Lubrication Adjustment 21 PARTS 22 Introduction 22 Female Hitch 23 Snowblower Assembly B2781B 24 Snowblower Assembly B2782B 26 Chute with Deflector 28 Manual Chute Rotation 29 Reduction Box 30 Worm Gearbox 32 Driveline Female Half 33 AVAILABLE OPTIONS 34 TORQUE SPECIFICATION TABLE 35 ...

Page 6: ...ety recommendations contained in this manual and those labeled on the snowblower and on the tractor Follow the safety recommendations and make sure that those with whom you work follow them Illustrations The illustrations may not necessarily reproduce the full detail and the exact shape of the parts or depict the actual models but are intended for reference only Direction Reference All references ...

Page 7: ...t is the owner s responsibility to be certain anyone operating this product reads this manual and all other applicable manuals to become familiar with this snowblower and all safety precautions Failure to do so could result in serious personal injury or snowblower damage If you have any questions consult your dealer BEFORE OPERATION Children Tragic accidents can occur if the operator is not alert ...

Page 8: ...cts that may be thrown or cause damage to the snowblower 4 Set transmission to neutral and disengage clutch if equipped before starting the engine 5 Do not operate snowblower in wintertime without wearing adequate winter garments Always wear protective clothing 6 Never attempt to make any adjustments while engine is running Read this manual carefully to acquaint yourself with the snowblower as wel...

Page 9: ... PTO lower the snowblower to the ground place all control levers in neutral shut off the engine remove the ignition key and allow the rotating parts to stop BEFORE unclogging the housing or the chute and making any repairs adjustments or inspections Use only a 36 long stick of wood to unclog the snowblower 10 If the snowblower starts to vibrate abnormally disengage the PTO stop the engine immediat...

Page 10: ...o be driven on public roads it must be equipped with an SMV Slow Moving Vehicle sign Check local traffic codes that may apply to unit usage on public roads and highways in your area 2 Be alert for all other traffic when driving the tractor snowblower on public roads or highways STORAGE Before storing the snowblower certain precautions should be taken to protect it from deterioration 1 Clean the sn...

Page 11: ...ey can settle suddenly leak down or be accidentally lowered 7 Do not attempt to service machine clear obstructions or unclog the snowblower with the engine running Always shut off engine and allow all motion to cease 8 The manufacturer will not claim responsibility for fitment of unapproved parts and or accessories and any damages as a result of their use 9 Make sure all shields and guards are sec...

Page 12: ...ged 70060 01213 657763 70060 02232 2500484 77700 04190 2500869 70060 04325 2500329 B2781B 77700 03073 2500847 B2782B 77700 03074 2500848 70060 01211 657761 70060 01040 655683 70060 01674 657804 70060 01212 657762 70060 01212 657762 70060 00736 2500324 ...

Page 13: ...m 2 over the bushing securing the chute with four 3 8 spacers item 3 and the three retaining plates items 5 6 as illustrated Secure using eight 5 16 x 1 1 2 bolts item 7 5 16 lockwashers and 5 16 NC hex nuts items 8 9 in the three retaining plates items 5 6 Securely tighten all bolts 4 Push the rotation worm towards the chute leaving sufficient play between the teeth and the worm to prevent the wo...

Page 14: ...r be used In all other cases attach the handle support with the top 2 existing bolts item 1 2 Figure 2a Insert the plastic grommet item 3 in the hole in the support 3 Figure 2b Insert the universal joint end of the rotation rod item 1 in the rotation worm item 2 and secure with a 10 24 x 1 allen setscrew and 10 24 nylon insert locknut items 7 8 Attach the rotation tube item 3 to the coupling rod i...

Page 15: ...ese two bolts according to the Torque Specification Table at the end of the 5 Figure 3b Tighten the two 10 mm bolts item 2 while pulling slightly on the support item 5 to keep it well distanced from the hood 6 Figure 3b Insert the universal joint end of the rotation rod item 1 in the rotation worm item 2 and secure with a 10 24 x 1 allen setscrew and 10 24 nylon insert locknut items 7 8 Attach the...

Page 16: ... and hook the S hook item 1 on one of the chain links not on the other S hook CAUTION Make sure that the quick coupler is securely locked in place A click must be heard 6 Adjust skid shoes according to adjustment instructions in the next OPERATION section WARNING This shaft turns at very high RPM If the collar is not locked to the shaft at tractor end or if the yoke at the blower end is not secure...

Page 17: ...e hydraulic pressure by moving control valve lever in all directions 5 Disconnect hydraulic hoses from tractor female couplers and install dust caps and plugs in couplers 6 Back tractor away from attachment carefully WARNING To avoid serious personal injury Escaping hydraulic diesel fluid under pressure can penetrate the skin causing serious injury Do not use your hands to check for leaks Use a pi...

Page 18: ...g up the PTO lever on left side of seat Push down to disengage Hydraulic Chute Rotation Pushing the hydraulic lever to the right rotates the chute to the right in a clockwise direction Pushing the lever to the left rotates the chute to the left Up and Down Control Pulling the lever backward raises the snowblower pushing the lever forward lowers the snowblower and pushing the lever fully forward se...

Page 19: ...stones are not thrown with the snow Adjust both skid shoes to the same height to keep the cutting edge level and adjust upwards for smooth surfaces Loosen skid shoe bolts and adjust according to instructions below and securely tighten bolts Clearance between cutting edge and surface Level paved surface Insert bolts in bottom holes Uneven or gravel surface Insert bolts to the required distance 1 2 ...

Page 20: ...snowblower 3 Figure 8a Tighten the chain using the tightening bolt item 3 on left hand side of fan housing 4 Figure 8b Leave approximately 1 16 deflection in the bottom span of chain 5 Tighten the four nuts securing reduction box to the snowblower Install the chain cover IMPORTANT To avoid damage to the snowblower retorque all bolts after the first 10 hours of operation Figure 8a Figure 8b ...

Page 21: ...parking brake lower the implement to the ground shut off the tractor engine remove the ignition key wait for all movement to stop and then clear the snow from the chute A definite pattern of operation is required to thoroughly clean the snow area These patterns will avoid throwing snow in unwanted places as well as eliminating a second removal of snow Where it is possible to throw the snow to the ...

Page 22: ...blower a few minutes after blowing snow to prevent freeze up of auger and fan Provide adequate blocking before working under the snowblower when in raised position Shear Bolts Figure 9 Always use special grade 5 shear bolts on fan shear assembly item 1 and special grade 5 grooved shear bolts on auger sections items 2 as shown on decal 70060 00736 Check shear bolts at frequent intervals for proper ...

Page 23: ... coming out 3 Reinstall oil change plug and remove oil level plug Fill gearbox with SAE 80W90 oil AGMA 5EP extreme pressure oil or equivalent until oil reaches oil level plug Reinstall oil level plug then oil filler plug LUBRICATION ADJUSTMENT Use a good grease gun grease and lubricate as follows DESCRIPTION TIME INTERVAL LUBRICATION REQUIRED Driveline 8 hours Grease each universal joint 24 hours ...

Page 24: ... is available at your local hardware supply All reference to right and left forward or rearward is from the operator seat facing the equipment while in operation Orders must give the complete description correct part num the total amount required the serial num the method of shipment and the shipping address The manufacturer reserves the rights to change modify or eliminate from time to time for t...

Page 25: ...FEMALE HITCH REF DESCRIPTION QTY PART CODE 1 Female quick hitch 1 70060 03214 660019 2 Hex bolt 5 8 NC x 1 1 4 PTD 4 75599 01725 0100092 3 Lockwasher 5 8 PTD 4 70001 00804 1200007 4 Hex nut 5 8 NC PTD 2 70001 00802 0900007 ...

Page 26: ...PARTS OM 0377SB A 24 SNOWBLOWER ASSEMBLY B2781B ...

Page 27: ...60 00940 654106 17 Hex bolt 1 2 NC x 1 PTD 4 75599 01325 0100068 18 Lockwasher 1 2 PTD 12 75599 33015 1200006 19 Flat washer 1 2 9 16 hole PTD 4 75599 32016 1400006 20 Carriage bolt 3 8 NC x 1 PTD 7 70050 94230 0300008 21 Shear bolt 5 16 NC x 1 1 2 gr 5 lock nut 1 70060 00726 665748 22 Nylon insert locknut 5 16 NC PTD 1 75599 31912 1000005 23 Plow bolt 3 8 NC x 1 1 4 PTD 6 70001 00789 0400002 24 S...

Page 28: ...PARTS OM 0377SB A 26 SNOWBLOWER ASSEMBLY B2782B ...

Page 29: ... x 1 gr 5 PTD 4 75599 01520 0100068 18 Lockwasher 1 2 PTD 12 75599 33015 1200006 19 Flat washer 1 2 9 16 hole PTD 4 75599 32016 1400006 20 Carriage bolt 3 8 NC x 1 gr 5 PTD 7 70050 94230 0300008 21 Nut hex 3 8 NC PTD 9 75599 31013 0900003 22 Plow bolt 3 8 NC x 1 1 4 gr 5 PTD 8 70001 00789 0400002 23 Stover locknut 3 8 NC PTD 8 70060 04442 1100003 24 Bolt hex 1 2 NC x 1 1 2 gr 5 PTD 8 75599 01530 0...

Page 30: ...58 657308 7 Bolt hex 1 4 NC x 3 4 GR 5 PTD 2 75599 01115 0100003 8 Flat washer 1 4 5 16 hole PTD 2 75599 32011 1400002 9 Lockwasher 1 4 PTD 2 75599 33011 1200002 10 Nut hex 1 4 NC PTD 2 75599 31011 0900001 11 Rotation bushing 1 70060 03226 659151 12 Spacer 4 70060 00697 665957 13 Retaining plate 3 holes 2 77700 03043 669496 14 Retaining plate 2 holes 1 77700 03044 669497 15 Bolt hex 5 16 NC x 1 1 ...

Page 31: ...ation handle including item 13 1 70060 02292 664007 15 Plastic handle 1 70060 01318 656797 16 Grommet 1 70060 01352 657390 17 Handle support All Tractors except B2320 B2620 B2920 1 70060 02280 667223 18 Rotation handle support 1 70060 00692 665951 19 Bolt hex 1 4 NC x 1 gr 5 PTD 5 75599 01120 0100004 20 Nut hex 1 4 NC PTD 5 75599 31011 0900001 21 Lockwasher 1 4 PTD 5 75599 33011 1200002 22 Bolt he...

Page 32: ...PARTS OM 0377SB A 30 REDUCTION BOX ...

Page 33: ... 77700 00707 658564 16 Driveline female half 1 70060 03224 658505 17 Allen socket setscrew 3 8 NC x 3 8 1 77700 00593 0500017 18 Nylon insert locknut 1 4 NC 1 75599 31911 1000003 19 Hex bolt 1 4 NC x 2 1 2 1 75599 01150 0100012 20 Hex bolt 5 16 NC x 2 1 2 gr 5 full thread PTD 1 70060 02866 0100237 21 Springrip washer 1 77700 00708 1300009 22 Flat washer 5 16 3 8 hole PTD 1 75599 32012 1400003 23 N...

Page 34: ...500153 8 Snap ring R062 1 77700 04242 4500155 9 Spacer 25 4 x 38 x 9 6 2 77700 04241 4500154 10 Bolt hex 8mm x 1 25 x 16 3 77700 04057 0200005 11 Bolt hex 10mm x 1 5 x 20 4 70060 04370 0200012 12 Plug 1 4NPT 3 70060 70419 663570 13 Pressure plug 1 8 27 NPT vent 1 70060 00840 654927 14 Allen set screw 1 4 NF x 1 4 lg 2 70060 02707 0500003 15 Key 1 4 x 1 4 x 2 lg 2 70060 03253 658188 16 Key 1 4 x 1 ...

Page 35: ...N QTY PART CODE 1 Driveline female half ass y 1 70060 03224 658505 2 Inner shield 1 70060 03429 658511 3 Nylon repair kit 1 70060 04238 661555 4 Yoke female shaft ass y 1 70060 03430 658508 5 Universal joint kit 1 70060 01020 654478 6 Yoke 1 dia hole 1 70060 01019 655740 ...

Page 36: ...OPTIONS OM 0377SB A 34 MB13 03 22 B2756 remplace le B2784B re MBu HYDRAULIC CHUTE ROTATION B2756 HYDRAULIC CHUTE DEFLECTOR BFL2518A HYDRAULIC CHUTE DEFLECTOR WITH DEVIATOR BL2666A ELECTRIC CHUTE DEFLECTOR B2516A ...

Page 37: ... 2 92 68 145 105 200 150 9 16 12NC 95 70 150 110 210 155 M14 X 1 5 99 73 155 115 215 160 9 16 18NF 105 79 165 120 235 170 M16 X 2 145 105 225 165 315 230 5 8 11NC 130 97 205 150 285 210 M16 X 1 5 155 115 240 180 335 245 5 8 18NF 150 110 230 170 325 240 M18 X 2 5 195 145 310 230 405 300 3 4 10NC 235 170 360 265 510 375 M18 X 1 5 220 165 350 260 485 355 3 4 16NF 260 190 405 295 570 420 M20 X 2 5 280...

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Page 40: ...Printed in Canada ...

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