Troy-Bilt 630B-Tuffy, 634F-Bronco, 634B-Super Bronco manual Checking and Adjusting

Page 19

 

Section 5: Maintenance

19

 

 

 

 

 

 

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.

 

 

 

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

 

ENGINE

 

screw located inside the spring

 

 

clockwise (viewed from operator’s

 

 

 

 

 

 

position) to increase tension on the

 

 

 

spring. Turn the screw counter-

 

 

 

clockwise to decrease tension. Once

 

 

D

adjusted, reattach the spring to the

 

 

Forward Clutch Bail.

 

 

 

e. Repeat Steps 2 and 3 to re-measure

 

C

 

the length of the spring. When the

 

 

second measurement is between

 

 

 

 

 

 

1/16" -to- 3/16" longer than the first

 

A

E

measurement, retighten the hex nut

 

(C) against the top of the adjuster (B).

 

 

B

Replacement Belt Information

 

 

 

Figure 5-3: Install tines so that cutting edge of tines enter soil first when tiller moves forward.

If the drive belt needs to be replaced, see

your local authorized dealer or refer to the

CHECKING AND ADJUSTING

measurement is between 1/16" -to- 3/16"

Parts List for ordering information. Use

FORWARD DRIVE BELT TENSION

longer than the first measurement.

only a factory-authorized belt as an “over-

4. If the spring is too short (less than

the-counter” belt may not perform satis-

It is important to maintain correct tension

factorily. The procedure requires average

1/16"), the tension is too loose. If the

on the forward drive belt. A loose belt will

mechanical ability and commonly available

spring is too long (more than 3/16"), the

cause the tines and wheels to slow down –

tools.

tension is too tight.

 

or stop completely – even though the

 

 

5. To adjust the length of the spring:

 

engine is running at full speed. A too tight

 

belt can result in unintentional tine move-

a. Release the Forward Clutch Bail.

 

ment when the clutch bail is in the Neutral

b. Unthread the hex nut (C, Figure 5-4)

 

(released) position.

about halfway up the adjustment

 

• Check belt tension after the first two

screw (D).

 

 

hours of break-in operation and after

 

 

5

every 10 operating hours.

 

 

 

 

 

• At the end of each tilling season, check

 

 

4

 

 

 

the belt for cracks, cuts or frayed edges

 

3

 

and replace it as soon as possible.

A

2

 

 

 

To Check Forward Belt Tension:

C

1

 

1. Stop engine, wait for all parts to stop

B

 

 

 

 

 

moving and disconnect spark plug wire.

 

D

 

2. With the Forward Clutch Bail in an

Hold bail against handlebar while

open (released) position, measure and

 

taking second measurement of

note the overall length of the cable spring

 

spring

 

(A, Figure 5-4) by measuring from the out-

 

 

 

ermost coil to the outermost coil.

 

 

 

3.Squeeze the Forward Clutch Bail

against the handlebar (see Figure 5-4) and

re-measure the length of the coils. The

Figure 5-4: To check forward belt tension, take two measurements of

the overall length of the coils in the spring – first with the clutch bail

belt tension is correct if this second

open, then with the clutch bail closed against the handlebar.

 

Image 19
Contents Operator’s Manual Table of Contents Know how to stop the unit and disengage the controls quickly Safety Alert SymbolUse slower engine speeds SafetyExercise caution to avoid slipping or falling Keep children and pets awayTo Avoid Serious Injury DecalsIntroduction Assembly StepsInspect Unit Clutch Cable Install Reverse Clutch Cable Models 634F and 634B only AssemblyCheck Level of Transmission Gear OIL Check AIR PressureCheck all nuts and screws for tightness Reverse Clutch Control Models 634F/634B Wheel Drive PinsIntroduction Engine ControlsDepth Regulator Lever Features and ControlsHandlebar Height Adjustment Forward Clutch BailStarting the Engine Pre-Start ChecklistIntroduction BREAK-IN Operation Starting and Stopping the EngineStopping the Tiller and Engine Operating the TillerOperation Tines will cause injury Stopping the Engine and TillerYour freshly tilled or cultivated soil Clumps of soil that can interfere withBy successive passes at one Quarter width see Fig Tilling Up and Down Slopes Vertical Tilling Read the following recommendations before tilling on slopesTerrace Gardening Loading and Unloading the Tiller Clearing the TinesCheck for OIL Leaks Maintenance ScheduleTransmission Gear OIL Service Tiller LubricationBolo Tines MaintenanceRemoving/Installing a Single Tine Removing/Installing a Tine AssemblyReplacement Belt Information Checking and AdjustingTo Check Forward Belt Tension To Check Reverse Belt Tension Forward Clutch Bail AdjustmentEngine Cleaning AIR Cleaner Service Engine OIL Service Checking and Adjusting Reverse Drive Belt TensionOFF Season Storage Spark Plug ServiceSpark Arrester Screen Service CARBURETOR/GOVERNOR Control AdjustmentsOEM-290-265 fits Tuffy, Bronco & Super Bronco TroubleshootingProblem Possible Cause Correction OEM-290-256 fits Tuffy, OEM-290-254 fit BroncoDrawing no Parts ListPart Description Parts List DRAWING/PARTS List no Parts List Drawing noPart Description QTY For Model 630B GW-9727 24 3 1917326 Hold Tine With Blunt End Toward You Left Side Right Side50049-02 TROY-BILT Tiller Lifetime Limited Warranty