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20

FORWARD CLUTCH 
BAIL ADJUSTMENT

If the Forward Clutch Bail does not func-
tion properly, first check that the forward 
drive belt is adjusted properly (see 

Check-

ing and Adjusting Forward Drive Belt Ten-
sion

).  If this fails to correct the problem, 

contact Troy-Bilt LLC or your authorized 
dealer for service advice.

CHECKING AND ADJUSTING RE-
VERSE DRIVE BELT TENSION 

(Models 634F/634A only)

It is important to maintain correct tension 
on the reverse drive belt.  A loose belt will 
cause the tines and wheels to slow down – 
or stop completely – even though the en-
gine is running at full speed. 

When checking belt tension, also check the 
belt for cracks, cuts or frayed edges and 
replace it as soon as possible. 

•  Check belt tension after the first two 
hours of break-in operation and after every 
10 operating hours.

To Check Reverse Belt Tension:
1.

   Stop engine, wait for all parts to stop 

moving and disconnect spark plug wire.

2.

  Remove screw in plastic belt cover and 

slide belt cover (which is attached to for-
ward clutch cable) out of the way.

3. 

 Have an assistant pull the Reverse 

Clutch Control knob all the way out and 
hold it in that position.  Measure the length 
of the cable wire between the end of the 
threaded cable adjuster (A, Figure 5-5) and 
the end of the Z-fitting (B) to which the ca-
ble wire is attached.  

4.

  The belt tension is ideal if the cable wire 

length measures between 1/8" to 1/4".  If it 
is less than 1/8" (and if there is no reverse 
action when the tiller is running), then make 
the following adjustments 
NOTE: If the length is more than 1/4", no ad-
justment is needed—as long as the reverse 
action functions properly.

5. 

 Release the Reverse Clutch Control 

knob.and then unthread the inner jam nut 
(C, Figure 5-6) one to two turns.  Pull the 
threaded cable adjuster (A, Figure 5-6) to 
the left until the inner jam nut (C) touches 
the bracket. 

6.

  Prevent the inner jam nut (C) from turn-

ing and tighten the outer jam nut (D) 
against the bracket.  Prevent the outer jam 
nut (D) from turning and tighten the inner 
jam nut (C) against the bracket.

7.  

Measure the gap by repeating Step 3.  

Readjust as needed by repeating Steps 5 
and 6.

8.

   Reinstall the belt cover.

Replacement Belt Information

If the drive belt needs to be replaced, see 
your local authorized dealer or refer to the 
Parts List for ordering information.  Use 
only a factory-authorized belt as an “over-
the-counter” belt may not perform satis-
factorily.  The procedure requires average 
mechanical ability and commonly available 
tools.

ENGINE CLEANING

Keeping the engine clean will help to en-
sure smooth operation and prevent dam-
age from overheating.  Refer to the Engine 
Owner’s Manual for engine cleaning ser-
vice intervals and instructions.  Be sure 
that the muffler is cool before servicing the 
engine.

AIR CLEANER SERVICE

The air cleaner filters dirt and dust out of 
the air before it enters the carburetor.  Op-
erating the engine with a dirty, clogged air 
filter can cause poor performance and 
damage to the engine.  Never operate the 
engine without the air cleaner installed.  In-
spect and service the air cleaner more of-
ten if operating in very dusty or dirty 
conditions.  Refer to the engine Owner’s 
Manual for air cleaner service intervals and 
instructions.  

ENGINE OIL SERVICE

Check the engine oil level before each use 
and after every five hours of continuous 
operation. Running the engine when it is 
low on oil will quickly ruin the engine.

It is recommended that you change the 
motor oil after every 10 hours of operation 
and even sooner when operating in ex-
tremely dirty or dusty conditions.  Refer to 
the Engine Owner’s Manual for detailed 
service instructions.

A. To Check the Engine Oil Level:

1.  

Park the tiller on a level area and shut 

off the engine.

2.

  Level the engine (use the Depth Regu-

lator Lever to adjust the engine angle).

Figure 5-5:  Measure cable wire length to 
check for correct reverse belt tension.

D

Figure 5-6:  Move threaded adjuster (A) to left 
to increase belt tension.

C

A

WARNING: 

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all 

moving parts to come to a complete stop, disconnect spark plug wire and move wire away from 
spark plug. Failure to follow these instructions can result in serious personal injury or property 
damage.

A B

Summary of Contents for 630C-Tuffy

Page 1: ...e 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 lands A spark arrester fo...

Page 2: ...n seek help from the experts Choose from the options below Visit troy bilt com for many useful suggestions Click on Customer Support button and you will get the four options reproduced here Click on the appropriate button and help is immediately available If you prefer to reach a Customer Support Representative please call 1 800 520 5520 The engine manufacturer is responsible for all engine relate...

Page 3: ...pipes open flames and sparks away from the fuel tank and fuel container d Fill fuel tank outdoors with extreme care Never fill fuel tank indoors Use a funnel or spout to prevent spillage e Replace all fuel tank and container caps securely f If fuel is spilled do not attempt to start the engine but move the ma chine away from the area of spillage and avoid creating any source of ig nition until fue...

Page 4: ...leasing whichever clutch control is engaged Do not attempt to restrain the tiller 15 Do not overload the tiller s capacity by attempting to till too deeply at too fast a rate 16 Never operate the tiller at high trans port speeds on hard or slippery surfaces Look behind and use care when backing up 17 Do not operate the tiller on a slope that is too steep for safety When on slopes slow down and mak...

Page 5: ... SHIELDS IN PLACE AND WORKING NEVER ALLOW CHILDREN OR UNINSTRUCTED ADULTS TO OPERATE TILLER SHUT OFF ENGINE AND DISCONNECT SPARK PLUG WIRE BEFORE MANUALLY UN CLOGGING TINES OR MAKING REPAIRS KEEP BYSTANDERS AWAY FROM MACHINE KEEP AWAY FROM ROTATING PARTS USE EXTREME CAUTION WHEN REVERSING OR PULLING THE MACHINE TOWARDS YOU Operating Symbols Varioussymbols shownhere withworddescriptions maybeusedon...

Page 6: ...ms listed in the Loose Parts List contact your local dealer or the factory items are missing or dam aged NOTE Use the screw length template Fig 2 1 to identify screws Loose Parts List Qty Description 1 Handlebar Support see A Fig 2 2 1 Handlebar Assembly see K Fig 2 2 Hardware bag contents 4 Hex hd screw 5 16 18 x 1 1 2 2 Hex hd screw 3 8 16 x 3 4 2 Flat Washer 3 8 4 Split lockwasher 5 16 4 Hex nu...

Page 7: ...wheel shaft This procedure is described in Wheel Drive Pins in Section 3 STEP 4 INSTALL FORWARD CLUTCH CABLE 1 Carefully unwrap the forward clutch ca ble cable without an attached knob from its shipping position and slide the thin ca ble wire T Fig 2 4 into the slot in the ca ble bracket Push the cable connector U Fig 2 4 up through the hole in the bracket until the groove in the connector snaps i...

Page 8: ...g 2 8 and Fig 2 9 from its shipping po sition and route it up to the handlebar Be sure that the cable is routed beneath the Forward Clutch Bail 2 Insert the cable CC Fig 2 8 through the slot in the cable bracket and position the flat side of the threaded assembly next to the flat side of the hole Slide the hex nut DD up the cable and tighten it securely 3 Fasten the reverse clutch cable to the lef...

Page 9: ...amage will result if the engine is run with out oil 1 Refer to the separate Engine Owner s Manual for engine oil specifications and capacities 2 With the tiller on level ground move the Depth Regulator Lever FF Fig 2 10 up or down until the engine is level 3 Add motor oil as described in the En gine Owner s Manual 4 Move the Depth Regulator Lever all the way down until the highest notch is en gage...

Page 10: ...ol Models 634F and 634A is engaged Use the FREEWHEEL mode only when the engine is not running In FREEWHEEL the wheel drive pins are placed only through the holes in the wheel shaft not the wheel hubs thus allowing the wheels to turn freely when you manually move the tiller To place the wheels in WHEEL DRIVE or FREEWHEEL 1 Stop engine disconnect spark plug wire from spark plug and allow engine to c...

Page 11: ...ob F Figure 3 4 out The wheels and tines will rotate in a reverse direction 4 Release the control knob to disengage stop the wheels and tines the engine will continue to run DEPTH REGULATOR LEVER This lever G Figure 3 5 controls the till ing depth of the tines Pull the lever back and slide it up or down to engage the notched height settings The travel position highest notch raises the tines approx...

Page 12: ...the directions in the separate Engine Owner s Manual Follow all instructions and safety rules carefully 8 Attach spark plug wire to spark plug Starting the Engine The following steps describe how to start and stop the engine WARNING Do not attempt to engage the tines or wheels until you have read all of the operating instructions in this Section Also review the safety rules in Section 1 Safety and...

Page 13: ... handlebars to try to make the tiller till more deeply This prevents the wheels from holding the tiller back and can allow the tines to rapidly propel the tiller forward which could result in loss of control property damage or personal injury 5 For reverse motion of the wheels and tines Models 634F 634A only a Look behind and exercise caution when operating in reverse Do not till while in reverse ...

Page 14: ...s will attempt to propel the tiller often causing the tiller to skip rapidly across the ground Sometimes slight downward pressure on the handlebars will help get through a particularly tough section of sod or unbroken ground but in most cases this won t be necessary Avoid trying to dig too deeply too quickly especially when busting sod or when tilling soil that hasn t been tilled for some time Use...

Page 15: ...ction 1 Safety of this manual 2 We recommend tilling up and down slopes rather than terracing Tilling vertically on a slope allows maximum planting area and also leaves room for cultivating IMPORTANT When tilling on slopes be sure the correct oil level is maintained in the engine check every one half hour of operation The incline of the slope will cause the oil to slant away from its normal level ...

Page 16: ...DING THE TILLER WARNING Loading and unloading the tiller into a vehicle is potentially hazardous and we don t recommend doing so unless absolutely necessary as this could result in personal injury or property damage However if you must load or unload the tiller follow the guidelines given next Before loading or unloading stop the en gine wait for all parts to stop moving disconnect the spark plug ...

Page 17: ... a cover is leaking check for loose screws If the screws are tight a new gasket or oil seal may be required If the leak is from around a shaft and oil seal the oil seal probably needs to be replaced See your authorized dealer or contact the factory for service or advice IMPORTANT Never operate the tiller if the transmission is low on oil Check the oil level after every 30 hours of operation and wh...

Page 18: ...ssion 6 Reinstall the wheel 7 Install a new gasket do not reuse old gasket and reinstall the transmission cov er 8 Refill the transmission using GL 4 gear oil SAE 85W 140 or SAE 140 9 Refill the engine with motor oil and re plenish the fuel tank with gasoline BOLO TINES The bolo tines will wear with use and should be inspected at the beginning of each tilling season and after every 30 oper ating h...

Page 19: ...rew D c Unhook the top of the spring from the Forward Clutch Bail d Use pliers to prevent the adjuster B from turning and turn the slotted screw lo cated inside the spring clockwise viewed from operator s position to increase ten sion on the spring Turn the screw coun terclockwise to decrease tension Once adjusted reattach the spring to the For ward Clutch Bail e Repeat Steps 2 and 3 to re measure...

Page 20: ...t the bracket 7 Measure the gap by repeating Step 3 Readjust as needed by repeating Steps 5 and 6 8 Reinstall the belt cover Replacement Belt Information If the drive belt needs to be replaced see your local authorized dealer or refer to the Parts List for ordering information Use only a factory authorized belt as an over the counter belt may not perform satis factorily The procedure requires aver...

Page 21: ...s on the machine the governor controls the maximum safe operating speed to protect the engine and all moving parts from damage caused by overspeed Authorized service shall be sought if a problem exists CARBURETOR GOVERNOR CONTROL ADJUSTMENTS The carburetor was adjusted at the factory for best operating speed Refer to the En gine Owner s Manual for any adjustment information or see your authorized ...

Page 22: ... oil level see Engine Owner s Manual Engine does not shut off 1 Misadjusted throttle control or ignition switch 1 See Engine Owner s Manual or Engine Service Dealer Wheels and Tines will not turn 1 Improper use of controls 1 Review Sections 3 and 4 2 Worn broken or misadjusted drive belt s 2 See Checking Drive Belt Tension Section 5 3 Internal transmission wear or damage 3 Contact local dealer or ...

Page 23: ...13 2 Hood Bracket Right Hand 12 GW 55015 Drag Bar 13 GW 55018 Depth Regulator Lever 14 686 04041 Tine Hood Assembly B C 686 04043 Tine Hood Assembly A 15 GW 55088 Bushing 16 GW 9384 Spring Depth Regulator 17 GW 9534 Spacer 18 710 04048 Hex Hd Flange Screw 5 16 18 x 1 19 786 04191 Trail Shield Stop Bracket 20 618 04000 Transmission Assembly B C 618 04001 Transmission Assembly A REF NO PART NO DESCR...

Page 24: ...24 MODELS 630C 634F 634A 5 10 2 5 15 1 12 16 21 3 13 20 4 17 11 22 7 25 8 6 23 14 18 18 7 9 ...

Page 25: ...wer Handlebar 10 786 04200 Panel 11 GW 55044 Tab Conduit Mount 12 GW 9855 Screw 10 24 x 2 13 725 0157 Cable Tie 14 736 3050 Flat Washer 3 8 15 786 04040 Bracket Reverse Clutch Cable B C 16 732 04185 Spring Forward Clutch 17 710 0106 Hex Hd Screw 1 4 20 x 1 1 4 18 710 0216 Screw Hex 3 8 16 x 3 4 20 710 0805 Screw Hex 5 16 18 x 1 1 2 21 712 0121 Hex Nut 10 24 22 712 0291 Hex Lock Nut 1 4 20 23 712 3...

Page 26: ...3 GW 50043 Support Washer Rear 4 711 04109 Drive Shaft A B C 5 GW 1224 1 Shim Rear Bearing Cap 010 thick GW 1224 2 Shim same as above except 030 thick GW 1224 3 Shim same as above except 005 thick GW 1224 4 Shim same as above except 062 thick GW 1325C Shim Set Incl the following shims two 1224 1 two 1224 2 one 1224 4 A For Model 630C B For Model 634F C For Model 634A 3 4 5 2 2 1 ...

Page 27: ...im 0 030 thick GW 1166 3 Shim 0 015 thick GW 1166 4 Shim 0 010 thick GW 1166 5 Shim 0 005 thick 4 GW 1086 Bronze Bushing 5 711 04092 Wheel Shaft B C 711 04088 Wheel Shaft A 6 GW 9305 Key Hi Pro 1 4 x 1 7 GW 1132 2 Spacer 8 1904278 Worm Gear Wheel Shaft 9 711 04078 Tiller Shaft 10 GW 1104 Woodruff Key 11 1904279 Worm Gear Tiller Shaft A For Model 630C B For Model 634F C For Model 634A 1 2 3 4 7 7 4...

Page 28: ...Oil Seal Drive Shaft 8 721 04031 Oil Seal Wheel Shaft 9 619 04013 Transmission Housing Assembly 10 721 04036 Oil Seal Tine Shaft 11 736 3008 Washer Flat 344 x 750 x 120 12 718 04008 Rear Bearing Cap 13 710 04048 Hex Hd Flange Screw 5 16 18 x 1 14 710 3008 Hex Hd Flange Screw 5 16 18 x 3 4 REF NO PART NO DESCRIPTION 2 2 1 5 4 6 6 8 8 9 10 10 12 3 14 13 11 7 Included with transmission when purchased...

Page 29: ...Bolo Tine Replacement Set Incl eight right hand tines eight left hand tines and required hardware A B C 642 0029 Left Hand Tine Assembly Incl one tine holder and eight tines assembled B C 642 0030 Right Hand Tine Assembly Incl one tine holder and eight tines assembled B C 642 0031 Left Hand Tine Assembly Incl one tine holder and eight tines assembled A 642 0032 Right Hand Tine Assembly Incl one ti...

Page 30: ... 634A 9 24 28 20 30 25 27 1 1 11 5 17 19 28 1 12 10 14 16 38 19 39 38 3 31 32 2 B C 37 A 40 1 28 43 7 8 37 19 39 33 4 38 34 FORWARD CLUTCH CABLE 35 42 28 24 22 22 24 6 13 21 28 16 29 18 36 23 41 REVERSE CLUTCH CABLE 15 28 ...

Page 31: ...ward Idler Lever 19 710 0117 Hex Hd Screw 5 16 24 x 1 B C 20 710 0237 Hex Hd Screw 5 16 24 x 5 8 21 710 0376 Hex Hd Screw 5 16 18 x 1 22 710 04049 Hex Hd Screw 5 16 18 x 5 8 23 710 0520 Hex Hd Screw 3 8 16 x 1 1 2 24 710 0599 Screw Self Tapping 1 4 20 x 1 2 25 710 3103 Hex Hd Screw 5 16 18 x 2 B C 26 712 3000 Lock Nut 3 8 16 27 712 3009 Lock Nut 5 16 18 B C 28 736 0119 Lock Washer 5 16 29 736 3050...

Page 32: ... commercial institutional industrial rental or demonstrator purposes the warranty COMMERCIAL on the tiller is limited in duration to 90 days from the date of purchase USE WARRANTY This warranty does not apply to parts that have been damaged by accident alteration misuse abuse neglect improper maintenance vandalism theft fire water or damage because of peril or other natural disaster HOW TO OBTAIN ...

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