Cub Cadet S621 SS Operator'S Manual Download

Page: 19 / 24

Model S621 SS

Ref.

No.

Part No.

Part Description

710-0134

Carriage Screw 1/4-20 x .62

710-0654A

TT Screw 3/8-18:1.00

710-0703

Screw 1/4-20 x .750

712-0397

Wing Nut 1/4-20

723-0233

Push Nut .25 I.D. x .50 O.D.

736-0204

Flat Washer .334 I.D.x .62 x.03

782-0046B

Deck - 21”

710-0653

TT Screw 1/4-20 x .375

710-0969

HL Screw 1/2-14 x .750

10.

731-1828

Baffle

11.

638-0012

Rear Axle Ass’y

12.

682-0531

Pivot Arm Ass’y

13.

682-7526

Trans. Axle Ass’y

14.

682-7528

Chain Cover Ass’y

15.

710-0653

TT Scr. 1/4-20 x .375

16.

710-0751

Cap Screw HH 1/4-20 x .620

17.

710-0896

AB Scr. 1/4-14 x .625

18.

710-1315

Scr. 3/8 116 x .25

19.

711-0835

Clevis Pin .50 Dia. x 4.82

20.

713-0453

Chain-Endls. #48 .500P x 24

21.

714-0474

Cotter Pin .125O.D. x .75

22.

720-0223

Grip

23.

732-0803A

Spring Lever

24.

732-0832

Torsion Spring

25.

736-0270

Bell Wash. .285 x .75 x .082

26.

736-0369

Fl. Wash..508 I.D. 1.000 x.020

27.

738-0529

Nut Shld. .825 Dia. x .165

28.

741-0324

Hx.Flg. Brg..506 I.D. x .590

29.

741-0522

Hx.Flg. Brg. .506 I.D. x.715

30.

741-0978

Hx. Slv. Brg..504 I.D. x .830

31.

748-0318

Wheel Rachet

32.

750-0151

Spacer .550 I.D. x /750 O.D.

33.

750-0515

Spacer .51 .D. x .70 O.D. x 38

34.

750-0807

Spacer .385 x .624 x .700

35.

750-1056

Shld. Spacer .385 I.D. X .715

36.

782-0568

Brkt. - Ht. Adj. Spring

37.

682-3052 Handle

Brkt.

Ass’y. R.H.

38.

682-3053 Handle

Brkt.

Ass’y. L.H.

39.

710-1348

Scr. AB 1/4-14 x .500

40.

731-1901

Trail Shield

41.

732-0842

Trail Shield Wire

42.

611-0064 Front

Axle

Assembly

43.

710-1241

Hx Scr. Wash Hd. Hi.-Lo.

44.

710-1242

Scr. Torx, Truss Hi.-Lo.

45.

714-0104

Cotter Pin .072 x 1.12 Lg.

46.

731-1836

Front Axle Cover, Black

47.

736-0286

Bowed Washer

48.

741-0492A

Bush. Block .505 Dia. x .62

49.

782-0565 Control

Arm

50.

734-2008

Wheel 8 x 2

51.

734-2010

Wheel 9 x 2

52.

736-0105

Spring Washer

53.

736-0504

Wave Wash .510 x .750 x .017

54.

738-0102

Shldr Scr .498 x 1.445 x3/8-16

55.

10622B

Spring, Ratchet, Plastic

56.

748-0381

Pawl: RH.

—

748-0188B

Pawl: LH. †

58.

16855

Ratchet Pawl Plate

59.

738-0137A

Shoulder Scr. .340 x .285

60.

712-0414

Top Lock Tab Weld Nut 1/4-20

61.

731-0982A

Hubcap: Rad. Spoke Beige

64.

725-0157

Cable Tie

65.

710-0604A

Hex Screw 5/16-18

66.

754-0460

V-Belt

67.

742-0741

21” Mulching Blade

68.

753-0609

Blade Adapter Kit

69.

736-0524A

Blade Bell Suport

70.

710-1257

Hex Bolt 3/8-24 x 2.5”Lg.

72.

735-0639

Spark Plug Insulator

73.

731-1832

Side Discharge Chute

74.

731-1833

Mulch Cover

75.

631-0066

Rear Chute Ass’y w/ Door

76.

731-1713B

Discharge Chute

77.

747-0965

Pivot Rod

78.

732-0819

Torsion Spring

79.

726-0111

Push Cap

80.

731-1874

Chute Door

81.

710-1268

Special Screw † (used with # 82)

82.

751B224437

Muffler Guard †

83.

751B281440

Engine Shroud †

84. 710-1256

Pan

Screw†

Ref.

No.

Part No.

Part Description

NOTE:

For

painted parts

, please refer to the list of color codes below. Please add the applicable color code, wherever

needed, to the part number to order a replacement part. For instance, if a part numbered 700-xxxx is painted Cub Yellow, the
part number to order would be 700-xxxx-0716.

Cub Yellow: 0716

Powder Black: 0637

† Not illustrated

Summary of Contents for S621 SS

Page 1: ...covered land unless the engine s exhaust system is equipped with a spark arrester meeting applicable local or state laws if any If a spark arrester is used it should be maintained in effective working order by the operator In the State of California the above is required by law Section 4442 of the California Public Resources Code Other states may have similar laws Federal laws apply on federal lan...

Page 2: ... help from our Customer Support Department or an authorized dealer You can locate the model number by standing behind the unit in the operating position and looking at the rear of the deck A sample model plate is explained below For future reference please copy the model number and the serial number of the equipment in the space below CALLING CUSTOMER SUPPORT If you have difficulty assembling this...

Page 3: ...ers helpers children and pets at least 75 feet from the machine while it is in operation Stop machine if anyone enters the area 6 Always wear safety glasses or safety goggles during operation and while performing an adjustment or repair to protect your eyes Thrown objects which ricochet can cause serious injury to the eyes 7 Wear sturdy rough soled work shoes and close fitting slacks and shirts Sh...

Page 4: ...r 5 Keep children away from hot or running engines They can suffer burns from a hot muffler 6 Never allow children under 14 years old to operate a power mower Children 14 years old and over should read and understand the operation instructions and safety rules in this manual and should be trained and supervised by a parent Service Safe Handling Of Gasoline 1 To avoid personal injury or property da...

Page 5: ...stment while the engine is running 9 Grass catcher components discharge cover and trail shield are subject to wear and damage which could expose moving parts or allow objects to be thrown For safety protection frequently check components and replace immediately with original equipment manufacturer s O E M parts only listed in this manual Use of parts which do not meet the original equipment specif...

Page 6: ... N T I N G A 1 5 S L O P E WARNING Do not mow on inclines with a slope in excess of 15 degrees a rise of approximately 2 1 2 feet every 10 feet A riding mower could overturn and cause serious injury If operating a walk behind mower on such a slope it is extremely difficult to maintain your footing and you could slip resulting in serious injury Operate RIDING mowers up and down slopes never across ...

Page 7: ...le carriage bolts must be seated properly into the handles See Figure 1 Figure 1 NOTE Your mower is shipped with the handle in the higher height position If you wish to lower the height of the handle refer to the Adjustment Section at this time Remove the hairpin clip from the outer hole in the weld pin on the handle mounting bracket Using a pair of pliers squeeze one leg of the lower handle again...

Page 8: ...le making sure the inner lip of attachment goes under the edge of the deck Secure with the wing nuts previously removed See Figure 6 Lift chute door on the grass bag adapter and slide grass bag onto the adapter See Figure 7 NOTE The chute door has been designed to move the starter rope out of the way of the bag when the chute door is opened Figure 7 Attaching Side Discharge Chute Remove mulching b...

Page 9: ... lever is located on the drive clutch control housing on the upper handle This lever is used to select the forward speed of the mower When changing speed selection release the drive clutch control See Figure 9 NOTE Slide the shift lever to a different speed position only when the engine is running Otherwise it may cause damage to the mower Safety Key The safety key is located on the engine See Fig...

Page 10: ...ire firmly on spark plug 7 Turn SwiftStart safety key 1 4 turn clockwise to RUN position 8 Firmly push primer bulb three times 9 While standing at the operating position and behind the upper handle depress the starter control button fully with your right thumb 10 Using your left hand pull the blade control handle all the way toward the upper handle 11 Release the button 12 Grasp the recoil rope st...

Page 11: ...ransporting mower ALWAYS lock and remove safety key and store in a safe place until next use The safety key is designed and intended to be removed from engine when not in use Removing key will prevent unsupervised or unexpected starting of mower by children or unsuspecting adults The safety key must be in the locked position before it can be removed Using Your Lawn Mower Thoroughly inspect the are...

Page 12: ...g height adjustment lever is located above the left rear wheel To adjust the cutting height pull the lever out and away from the mower and choose a cutting height Slide it into the new position See Figure 12 Figure 12 NOTE For rough or uneven lawns move the height adjustment lever to the highest position This will help stop scalping Handle Height Adjustment Your mower is shipped with the handle in...

Page 13: ...on the adjustable cable bracket and tighten hex nut Figure 16 SECTION 7 MAINTAINING YOUR LAWN MOWER WARNING Be sure to disconnect the spark plug wire and De energize starter before performing any repairs or maintenance DO NOT attempt any maintenance or service to the engine and or mower equipped with the safety key in the unlocked and or energized mode WARNING NEVER assume the starter is de energi...

Page 14: ...ower and reduce serviceability Blade Replacement Sharpening WARNING When removing the cutting blade for sharpening or replacement protect your hands by using heavy gloves or a rag to grasp the cutting blade Remove the bolt and the blade bell support which hold the blade and the blade adapter to the engine crankshaft See Figure 18 Remove the blade and the adapter from the crankshaft WARNING Periodi...

Page 15: ...ve the three hex screws holding the baffle to the deck and pivot baffle towards the rear of the mower See Figure 19 Figure 19 Remove hex bolt from the rear of unit holding the transmission to the mower housing See Figure 20 Figure 20 Tilt the transmission forward and loosen the idler pulley bolt and lock nut half a turn See Figure 21 Using a pair of pliers pull back and rotate belt keeper bracket ...

Page 16: ...ard pin Reinstall the bolt securing transmission to rear mower housing Pivot the baffle back to its original position and secure with three hex screws earlier removed Lightly lubricate the inside of the blade adapter and reinstall the spacer wave washer blade adapter assembly and blade in the correct order Tighten the hex bolt to secure the blade to torque 450 600 in lbs SECTION 8 OFF SEASON STORA...

Page 17: ...ct wire to spark plug 4 Place safety key in run position 5 Fill tank with clean fresh gasoline 6 Clean fuel line 7 Clean adjust gap or replace 8 Wait a few minutes to start 9 Use recoil starter to start engine Engine runs erratic 1 Spark plug wire loose 2 Blocked fuel line or stale fuel 3 Vent in gas plugged 4 Water or dirt in fuel system 5 Dirty air cleaner 6 Carburetor out of adjustment 1 Connec...

Page 18: ... 7 55 56 59 61 16 25 31 39 37 73 6 1 2 4 5 1 6 3 6 2 44 Pulley Assembly for reference only 45 49 45 46 47 48 43 42 48 43 9 5 4 5 4 74 78 80 77 79 75 76 68 68 67 69 70 9 8 10 8 61 54 53 50 52 72 2 66 IMPORTANT For a proper working machine use Factory Approved Parts V BELTS are specially designed to en gage and disengage safely A substitute non OEM V Belt can be dangerous by not disengaging complete...

Page 19: ...ield Wire 42 611 0064 Front Axle Assembly 43 710 1241 Hx Scr Wash Hd Hi Lo 44 710 1242 Scr Torx Truss Hi Lo 45 714 0104 Cotter Pin 072 x 1 12 Lg 46 731 1836 Front Axle Cover Black 47 736 0286 Bowed Washer 48 741 0492A Bush Block 505 Dia x 62 49 782 0565 Control Arm 50 734 2008 Wheel 8 x 2 51 734 2010 Wheel 9 x 2 52 736 0105 Spring Washer 53 736 0504 Wave Wash 510 x 750 x 017 54 738 0102 Shldr Scr ...

Page 20: ...732 1172 Torsion Spring 16 731 0904A Upper Control Housing 17 731 0924 6 Speed Shift Lever 18 713 0397 Gear Insert 19 710 1667A C Sunk Tap Screw 10 x 75 L 20 732 0627 Shift Lever Spring 21 16864 6 Speed Rack Cable Brkt 22 731 0905A Lower Control Housing 23 731 0906 Cable Mounting Cap 24 731 0620 Control Lever 25 746 0939 6 Speed Cable 26 746 0711A Self Propelled Cable 27 647 0058 Control Handle 28...

Page 21: ...712 0896 Hex Jam Nut 1 4 28 6 782 7598 Belt Keeper 7 741 0600 Bearing 8 750 1050 Flange Spacer 9 682 0027A Idler Bracket Assembly 10 710 0299 Hex Cap Screw 1 4 28x 1 0 11 732 0849A Extension Spring 12 741 0682A Bearing Sleeve 13 736 0570 Flat Washer 885 x 1 45 14 721 0329 Oil Seal 15 618 0253 Upper Housing Assembly 16 736 0616 Thrust Washer 504 x 70 17 717 1487 Pinion Shaft 10T 18 736 0314 Thrust ...

Page 22: ...22 Safety Decorative Labels ...

Page 23: ...23 YOUR NOTES Comments Date ...

Page 24: ...adet equipment used commercially is warranted for one year only Commercial use is defined as either having hired operators or used for income producing purposes Items not covered The warranty does not cover routine maintenance items such as lubricants filters oil fuel air and hydraulic cleaning tune ups brake and or clutch inspection adjustments made as part of normal maintenance blade sharpening ...

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Cub Cadet S621 SS, Operator'S Manual

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