Bush Hog 865H Manuel de l'opérateur télécharger pdf (Page 21)

4-6 TROUBLESHOOTING

Troubleshooting procedures are listed in Table 4-1. If

the problem cannot be solved or replacement parts

are necessary, contact your authorized Bush Hog

dealer. Please have ready your machine name,

model number, serial number, purchase date and

exact cause or description of problem.

TABLE 4-1 GENERAL TROUBLESHOOTING

PROBLEM PROBABLE CAUSE REMEDY

Uneven cut Cutter not level side to side or front to rear. Refer to Section II.

Worn or bent blades. Replace blades per paragraph 4-3.

Stripping or windrowing Possible build up of material under cutter. Clean cutter.

Cutter not level. Refer to SECTION II.

Worn blades. Replace per paragraph 4-3.

Cutter not being operated at rated RPM speed. Set tractor throttle for proper PTO

speed during operation.

Front skids holding tall material down. Remove front skids.

Noisy cutter Loose components. Check all bolts for tightness.

Low oil in gearboxes. Check for proper oil level. Refer

to paragraph 4-2.

Rapid blade wear Blade contacting the ground. Adjust cutter to operate at a height

(cutting edge) that will eliminate ground contact.

Rapid blade wear Cutter not being operated at rated RPM speed. Set tractor throttle for proper PTO

(bolt hole) speed during operation.

Cutter vibration Cutter not being operated at rated RPM speed. Set tractor throttle for proper PTO

speed during operation.

Blades on same spindle have unequal weight. Replace blades with matched set.

Wings will not raise Valve plumbed wrong. Plumb as shown in Figure 5-12.

Reverse hoses to tractor auxiliary

hydraulic outlets.

Shields failing. Excess debris accumulation. Clean debris from cutter.

No grease. Lubricate shields per paragraph 4-2.

Not chained. Fasten shield chains to stationary location.

IMPORTANT

DO NOT OVER-TIGHTEN NUT AND CAUSE

SPRING TO BECOME SOLID AS THIS WILL

CAUSE SHAFT TO FAIL.

Figure 4-2 Spring Length

“EG” Clutch 1-17/64” (32.2mm)

Spring

Length

4-4 SLIP CLUTCH OPERATIONAL CHECK

After implement has been stored for 30 days or

more, perform the following operational check:

A. Loosen eight nuts retaining clutch springs 1/3 turn

or until spring can be turned with fingers.

B. With tractor at idle speed, engage tractor PTO

drive for 2-3 seconds. Clutch should slip without turn-

ing blades. If clutch does not slip, contact your au-

thorized Bush Hog dealer.

C. Retighten nuts to within 1/64” of original position.

Initial spring length is shown in Figure 4-2.

IMPORTANT

FAILURE TO RETIGHTEN NUTS TO ORIGINAL

POSITION MAY CAUSE DAMAGE TO IMPLE-

MENT AND/OR TRACTOR DUE TO IMPROPER

SLIP CLUTCH TORQUE SETTING.

4-5 SLIP CLUTCH ADJUSTMENT

The slip clutch is factory preset to the correct torque

for protecting implement and tractor. Periodic ad-

justment is recommend; refer to section 4-4. Should

adjustment be needed, first check to be sure all spring

lengths are the same. Initial spring lengths are shown

in Figure 4-2. If necessary, adjust nut onany spring

that is unequal. Adjust all eight spring retaining nuts

1/3 of a turn (2 flats on a nut) and check clutch slip-

page. If further adjustment is necessary, do so in 1/3

turn increments. Adjust only to provide sufficient

torque to prevent slippage under normal conditions.

Occasional slippage is normal for drivetrain protection.

If satisfactory results cannot be obtained consult your

Bush Hog dealer.

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Bush Hog 865H Manuel de l'opérateur Page 21

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