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Section 5: Maintenance & Lubrication 

Table of Contents

AP-SC4060 & AP-SC4072 Skid Steer Rotary Cutters 326-765MK

12/14/18

25

Cutter Blade Maintenance

WARNING

!

To avoid serious injury or death:  

•

Always shut power machine down using the “Shutdown 

Procedure” provided in this manual before servicing, 

adjusting, cleaning, or maintaining the attachment.

•

Do not operate cutter with blades that are out-of-balance, 

bent, excessively worn, excessively nicked, or with blade 

bolts that are excessively worn. Such blades can break loose 

at high speeds.

Always inspect blades before each use. Make certain 
they are properly installed and in good working condition. 
Replace any blade that is damaged, worn, bent, or 
excessively nicked. Never try to straighten a bent blade! 
Small nicks can be ground out when sharpening. 

Remove blades and sharpen or replace as follows:

1.

Properly shut down skid steer according to your skid 
steer Operator’s Manual.

2. Secure cutter deck in the up position with solid 

supports before servicing underside of cutter.

3.

Refer to Figure 5-1:

 Remove blade bolt access 

cover.

4.

Refer to

 

Figure 5-2:

 Rotate blade bolt (#1) until in 

alignment with access hole.

5. Unscrew locknut (#5) to remove cutting blade (#2). 

Blade bolt (#1) is keyed and will not turn freely.

6. Blades should be sharpened at the same angle as 

the original cutting edge and must be replaced or re-
ground at the same time to maintain proper balance 
in the cutting unit. The following precautions should 
be taken when sharpening blades:

a. Do not remove more material than necessary. 

b. Do not heat and pound out a cutting edge. 

c. Do not grind blades to a razor edge. Leave a blunt 

cutting edge approximately 1/16" thick.

d. Always grind cutting edge so end of blade remains 

square to cutting edge and not rounded.

e. Blades should weigh the same with not more than 

1 1/2 oz. difference. Unbalanced blades will cause 
excessive vibration which can damage gearbox 
bearings and create structural cracks.

IMPORTANT: 

Replace cutting blades in sets with 

genuine OEM blades only. Blades must be replaced 
in sets. Not replacing blades in sets will result in an 
out-of-balance condition that could contribute to 
premature bearing wear/breakage and/or structural 
cracks in gearbox and/or deck.

Blade Bolt Access Cover Location

Figure 5-1

Cutter Blade Assembly

Figure 5-2

Refer to Figure 5-2:

WARNING

!

To avoid serious injury or death:  
A locknut that has been removed can lose its thread locking 

properties. Reusing a used locknut can result in a thrown 

blade. Always use a new locknut when installing blades.

7.

Insert blade bolt (#1) through blade (#2), 
blade carrier (#3) and flat washer (#4). Secure blade 
with a new locknut (#5).

8. Torque locknut (#5) to 450 ft. lbs.

9.

Refer to Figure 5-1:

 Replace blade bolt access 

cover.

Blade Bolt 
Access Cover

39985

39994

Kubota Cutter Blade Parts

Item Part No.

Part Description

318-586A BLADE BOLT KIT (Contains #’s 1, 4, & 5)

1

802-277C

BLADE BOLT

2

820-550C

CUTTER BLADE

3

326-849H

BLADE CARRIER SC4060

3

312-850H

BLADE CARRIER SC4072

4

804-147C

WASHER FLAT

5

803-170C

NUT TOP LOCK

Use 1-11/16" Socket Wrench On Blade Nut (#5)

IMPORTANT: 

Examine blade bolts, washers, and 

nuts for excessive wear and replace if worn.

Содержание AP-SC4060

Страница 1: ...in French Language please see your Kubota dealer Read the Operator s Manual entirely When you see this symbol the subsequent instructions and warnings are serious follow without exception Your life and the lives of others depend on it Skid Steer Rotary Cutters AP SC4060 AP SC4072 326 765MK Operator s Manual Printed 12 14 18 39979 ...

Страница 2: ...ally ordered the weights and measurements are no longer accurate for your machine Update the record by adding the machine weight and measurements provided in the Specifications Capacities Section of this manual with the Option s weight and measurements Dealer Contact Information Model Number Serial Number Machine Height Machine Length Machine Width Machine Weight Delivery Date First Operation Acce...

Страница 3: ...tion 1 Assembly Set up 7 Skid Steer Requirements 7 Dealer Preparations 7 Skid Steer Shutdown Procedure 7 Uncrating 7 Torque Requirements 7 Front Chain Guards Assembly 8 SC40 Motor And Hose Assembly 9 Hitch Hook Up 10 Hydraulic Hose Hook up 11 Front Roller Assembly Optional 11 Case Drain Assembly Optional 12 Pressure Gauge Assembly Optional 13 Operator Protective Door Optional 14 Section 2 Adjustme...

Страница 4: ...iate App on your smart phone open the App point your phone on the QR code and take a picture Dealer QR Locator The QR code on the left will link you to available dealers for Kubota products Refer to Parts Manual QR Locator on this page for detailed instructions Table of Contents 12 14 18 AP SC4060 AP SC4072 Skid Steer Rotary Cutters 326 765MK See previous page for Table of contents ...

Страница 5: ...under the watchful eye of a responsible adult Be alert and shut the attachment and skid steer track loader down if children enter the work area Never carry children on the power machine or attachment There is not a safe place for them to ride They may fall off and be run over or interfere with the control of the power machine Never allow children to operate the power machine even under adult super...

Страница 6: ...re doing work Refer to the Operator s Manual for additional information Work on a level surface in a clean dry area that is well lit Lower attachment to the ground and follow all shutdown procedures before leaving the operator s seat to perform maintenance Do not work under any hydraulic supported equipment It can settle suddenly leak down or be lowered accidentally If it is necessary to work unde...

Страница 7: ...and ear plugs Clothing should fit snug without fringes and pull strings to avoid entanglement with moving parts Prolonged exposure to loud noise can cause hearing impairment or hearing loss Wear suitable hearing protection such as earmuffs or earplugs Operating equipment safely requires the operator s full attention Avoid wearing headphones while operating equipment Use Safety Lights and Devices S...

Страница 8: ...est dealer visit our dealer locator at www landpride com 3 Some new equipment installed during repair requires safety labels to be affixed to the replaced component as specified by Kubota When ordering new components make sure the correct safety labels are included in the request 4 Refer to this section for proper label placement To install new labels a Clean surface area where label is to be plac...

Страница 9: ...C4072 Skid Steer Rotary Cutters 326 765MK 12 14 18 5 39981 818 831C Warning High Pressure 818 830C Safety Combo Danger Keep Hands Feet Away Danger Thrown Object Hazard Danger Rotating Blade Hazard Warning General Safety Notice Read Manual Observe Safety Messages ...

Страница 10: ...ting practices will help you get years of satisfactory use from this product Application SC4060 SC4072 construction grade cutters are designed with the commercial or high use consumer in mind The SC40 cutter features a rigid mounting system 1 4 thick deck 3 swinging blades and a solid blade carrier allowing it to cut and shred brush or trees up to 4 in diameter The strong reinforced leading edge o...

Страница 11: ...locks 3 Turn off engine and remove switch key to prevent unauthorized starting 4 Relieve all hydraulic pressure to auxiliary hydraulic lines 5 If included raise seat bar and move controls until both lock 6 Wait for all components to come to a complete stop before leaving the operator s seat 7 Use steps grab handles and anti slip surfaces when stepping on and off the skid steer or attachment Uncrat...

Страница 12: ...e use of front and rear safety guards is mandatory with this cutter Stop blade rotation if a bystander is in or around the area 1 Install front chain guard 1 as shown with four 3 8 16X1 1 4 bolts 4 2 Insert 3 8 16X1 1 4 bolts 4 through chain guard 1 and through the cutter s front bar 2 3 Secure 3 8 16X1 1 4 bolts 4 with four flanged locknuts 5 4 Repeat steps 1 through 3 for chain guard 3 5 Tighten...

Страница 13: ... unit then lifting it upward 3 Remove two 1 2 13X1 3 4 bolts 3 and lock washers 4 4 Remove 1 4 20X1 bolts 10 hex nuts 7 washers 8 9 from hose clamp support 11 5 Remove existing motor and hose assembly 6 Clean old gasket 5 from gearbox flange 12 6 Place new gasket 5 onto gearbox flange 12 7 Gently lower new motor and hose assembly 6 onto gasket 5 with hoses extending toward the hitch plate 8 Secure...

Страница 14: ...te back 7 Push lock handles of the skid steer down ensuring the pins go through the bottom slots of the Rotary Cutter s hitch and the handles lock down 8 Run the height adjustment safety chain under the upper cross tube and under the skid steer hitch plate See Figure 1 5 Attach to skid steer s lower hitch loop See Figure 2 2 on page 15 9 For additional information on how to adjust the safety chain...

Страница 15: ...p tie hydraulic hoses together every 2 feet from male and female couplers IMPORTANT Customer to select best way to route hydraulic hoses Make sure hoses will not contact the skid steer wheels or tracks See Equipment Clearances on page 16 for detailed instructions on how to check for clearances NOTE Use of Kubota s SVL Hose Stay is not recommended for this attachment 70030 1 Do Not Use SVL Hose Sta...

Страница 16: ... hydraulic motor 4 Attach adapter fitting 3 to hole C in hydraulic motor 4 as shown and tighten 5 Route hydraulic hose 5 through designated areas A B as shown 6 Attach female end of hydraulic hose 5 to adapter fitting 3 and tighten 7 Place the motor shroud back in its designated place and pull back to lock it in place Tighten hex nuts 2 to correct torque 8 Attach flat faced coupler 6 to the male e...

Страница 17: ...ng 9 4 Attach curved end of hydraulic hose 8 to tee fitting 9 and tighten 5 Route hydraulic hose 8 through the hole in motor shroud 1 that is designated for the pressure gauge 3 6 Attach hydraulic hose 8 to the pressure gauge 3 and tighten 7 Attach the pressure gauge 3 using three 8 32 X 3 4 round head screws 4 Put the screws through the holes in the pressure gauge and motor shroud and fasten them...

Страница 18: ...erator Protective Door See your skid steer Operator s Manual for installation instructions of their Operator Protective Door 1 Cut notches in protective door as needed to provide clearance around u bolts and skid steer frame 2 Install Operator Protective Door to the skid steer s hand hold with two u bolts 3 flat bars 2 and four nuts 1 as shown Tighten nuts to correct torque Operator Protective Doo...

Страница 19: ...oes should not be raised higher than 16 1 2 off the ground 18 maximum cutting height 1 Raise cutter s rear skid shoes slightly less than 16 1 2 off the ground Secure the cutter with support blocks 2 Run height adjustment safety chain under the upper cross tube and skid steer hitch plate to the skid steer lower hitch loop Thread chain through the hitch loop and back toward the hitch plate Connect q...

Страница 20: ...e cap and pressure gauge hose Blade Rotation Change Figure 2 3 70013 Equipment Clearances Visually inspect hydraulic hoses for possible pinch points and length Make any necessary adjustments before putting equipment into service 1 If necessary have someone stand nearby that can motion for the operator to stop if a problem develops while checking for clearances 2 With deck lowered to its minimum cu...

Страница 21: ...ydraulic fluid under high pressure can penetrate the skin and or eyes causing a serious injury Wear protective gloves and safety glasses or goggles when working with hydraulic systems Use a piece of cardboard or wood rather than hands when searching for leaks A doctor familiar with this type of injury must treat the injury within a few hours or gangrene may result DO NOT DELAY Do not become entang...

Страница 22: ...nd uphill Engage skid steer park brake and remove ignition switch key once it is loaded Secure skid steer loader and attachment using tie downs and chains IMPORTANT Do not over angle hitch plate forward Over angling can cause damage to deck and hitch Cutting Instructions 1 Thoroughly inspect the area to be cut for debris and unforeseen objects Mark any potential hazards 2 Set skid steer hydraulic ...

Страница 23: ...19 Special Cutter Operating Instrucitons Figure 3 2 70749 Deck is open in front and rear The direction of travel while cutting should be forward reverse Deck open Deck open Never swing deck side to side without first raising the deck off the ground and high enough to clear all obstacles Deck not open Deck not open ...

Страница 24: ...ab must also be equipped with an Operator Protective Door which may have been supplied with the skid steer unit Kubota does offer a protective door with the SC4060 and SC4072 if one is not provided by your skid steer supplier If the skid steer is to be operated on local roadways it must be equipped with appropriate Slow Moving Vehicle SMV and other required lighting packages so as to make it compl...

Страница 25: ...ver be allowed to come in contact with objects such as wire cable rope or chains that might become entangled These types of entangled objects can become extremely hazardous by rotating outside of the cutter deck housing resulting in serious injury or death Always inspect the area before you mow The best mowing results will be achieved at speeds between 2 mph and 5 mph as ground and mowing conditio...

Страница 26: ...tter s skid shoes Section 4 Optional Equipment Pressure Gauge Bundle Refer to Figure 4 2 Pressure Gauge Bundle326 867A Kubota offers an optional motor pressure gauge that allows for the operator to ensure that the motor is operating at optimal psi Case Drain Bundle Refer to Figure 4 3 Case Drain Bundle 60 326 863A Case Drain Bundle 72 326 864A Kubota offers a case drain bundle for the SC4060 and S...

Страница 27: ...e gpm ratings above If your cutter s motor and hose assembly is not compatible with your skid steer you should replace it with one of the assemblies above Protective Door Assembly Refer to Figure 4 4 Protective Door Assembly326 024A The skid steer MUST be equipped with an Operator Protective Door for shielding against flying debris when attached to a Rotary Cutter Kubota offers a universal Operato...

Страница 28: ...eck for loose hardware missing parts broken parts structural cracks and excessive wear Make repairs before putting implement back into service Serious breakdowns can result in injury or death Backup alarm must be in good working order to warn others Use a rear view mirror that is in good condition to help see undesirable situations behind the unit Drive at a slower speed to compensate for blind sp...

Страница 29: ...ing blades a Do not remove more material than necessary b Do not heat and pound out a cutting edge c Do not grind blades to a razor edge Leave a blunt cutting edge approximately 1 16 thick d Always grind cutting edge so end of blade remains square to cutting edge and not rounded e Blades should weigh the same with not more than 1 1 2 oz difference Unbalanced blades will cause excessive vibration w...

Страница 30: ... park brakes shut the skid steer off and remove switch key 3 Remove 3 8 hex nuts 3 lock washers 4 flat washers 5 3 8 plow bolts 2 and three skid shoes 1 6 7 from each side of the deck 4 Plow bolts should be checked for wear and replaced if necessary 5 Install the new skid shoes 1 6 7 to one side of the deck as shown with 3 8 16 GR5 plow bolts 2 flat washers 5 lock washers 4 and 3 8 hex nuts 3 Tigh...

Страница 31: ...nd of the working season or when the cutter will not be used for a long period 1 Clean off any dirt or grease that may have accumulated on the cutter and moving parts Scrape off compacted dirt from the bottom of the deck and then wash the surface thoroughly with a garden hose A coating of oil may also be applied to the lower deck area to minimize oxidation 2 Check blades and blade bolts for wear a...

Страница 32: ...ing The motor spindle hub has two 1 2 pipe plugs located on top side of deck housing 1 Disengage blade hydraulics Make sure blades have come to a complete stop 2 Set cutter down on level ground 3 Set park brake shut engine off and remove switch key before continuing 4 Remove 1 2 dip stick The end of the dipstick should have fluid on it If it does not add fluid 5 Alternate method Dip a tape measure...

Страница 33: ...pm 56 8 94 6 lpm flow High volume drive motor 26 43 gpm 98 4 162 8 lpm flow Hydraulic pressure 1500 to 3500 psi 10 34 to 24 13 MPa Deck thickness 1 4 6 mm Side skirt construction 1 4 6 mm Steel Deck wear protection Four corner mounted skid shoes and two mid skid shoes Skid shoes construction 3 8 10 mm plate Dishpan Heavy duty round 5 8 16 mm plate Blade size 1 2 x 5 1 3 cm x 12 7 cm bi directional...

Страница 34: ...6 Specifications Capacities Table of Contents AP SC4060 AP SC4072 Skid Steer Rotary Cutters 326 765MK 12 14 18 30 39997 20 1 2 52 1 cm SC4060 72 1 2 1 84 m SC4072 84 1 2 2 15 m SC4060 79 2 01 m SC4072 91 2 31 m ...

Страница 35: ...e 1 2 x 5 Heat treated free swinging blades Heat treated blades offer longer life Free swinging blades protect from obstructions 4 Diameter cutting capacity Can aid in clearing brush SC4060 High blade tip speed Standard motor 15 668 fpm at 25 gpm High flow motor 15 440 fpm at 43 gpm SC4072 High blade tip speed Standard motor 16 678 fpm at 25 gpm High flow motor 18 527 fpm at 43 gpm Optional front ...

Страница 36: ...Blade bolts not tightened properly Use new nut and torque blade bolt nuts to 450 ft lbs Blade carrier becomes loose Running loose in the past Replace gearbox output shaft and blade carrier Blade carrier hardware not tight enough Tighten to specified torque Blade bolt holes worn Blade hardware running loose Replace blades and blade bolts if worn Not maintaining tip speed Slow down to maintain tip s...

Страница 37: ...0 M16 X 1 5 155 115 240 180 335 245 5 8 18 150 110 230 170 325 240 M18 X 2 5 195 145 310 230 405 300 3 4 10 235 170 360 265 510 375 M18 X 1 5 220 165 350 260 485 355 3 4 16 260 190 405 295 570 420 M20 X 2 5 280 205 440 325 610 450 7 8 9 225 165 585 430 820 605 M20 X 1 5 310 230 650 480 900 665 7 8 14 250 185 640 475 905 670 M24 X 3 480 355 760 560 1050 780 1 8 340 250 875 645 1230 910 M24 X 2 525 ...

Страница 38: ...ride s judgment shall have been misused or damaged by accident or lack of normal maintenance or care or which has been repaired or altered in a way which adversely affects its performance or reliability or which has been used for a purpose for which the product is not designed Misuse also specifically includes failure to properly maintain oil levels grease points and driveline shafts Claims under ...

Страница 39: ...all representations and warranties whether express 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 in the information therein The Product s described in ...

Страница 40: ...ision Telephone 1175 S Guild Ave Lodi CA 95240 209 334 9910 Central Division Telephone 14855 FAA Blvd Fort Worth TX 76155 817 571 0900 Northern Division Telephone 6300 at One Kubota Way Groveport OH 43125 614 835 1100 Southeast Division Telephone 1025 Northbrook Parkway Suwanee GA 30024 770 995 8855 ...

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