Belt Adjustment, Belt Replacement | Bush Hog ATH 900 specs

40 HOURS

7. Spindle Assembly - Apply multi-purpose grease with grease gun until grease purges out top seal. Grease fittings for spindles should be accessed by removing the plastic plugs in the shields. After com- pleting lubrication, replace plastic plugs.(Figure 4-1C)

4-3 BELT ADJUSTMENT

Belt tension should be checked every 40 hours to get maximum life from drive belt and best perfor- mance from cutter. Belt tension is adjusted by increasing or decreasing the length of the spring on the movable idler. For proper belt tension, the spring length should be set at 8-3/4”. (Figure 4-1C) To adjust the spring length, loosen or tighten the 3/8” hex nuts on the spring adjustment rod until the cor- rect spring length is reached.

Figure4-1C

Spring Length Adjustment - 3/8” Hex Nuts

Spring Length 8-3/4”

(7) 40 Hours

4-4 BELT REPLACEMENT

Use only genuine Bush Hog replacement parts. A. Remove right and left side shields.

B. Relieve spring tension by loosening the two 3/8” hex nuts on the spring adjustment rod. (Figure 4-1C.

C. Remove old belt.

D. Install new belt, referring to the diagram below (also refer to the decal on the mower deck). Be sure that the belt is properly positioned in all sheave grooves.

E. Adjust tension on belt by adjusting the length of the spring on the movable idler. The correct spring length is 8-3/4”.

F. Replace right and left side shields.

4-5 BLADE REPLACEMENT

CAUTION

WEAR HEAVY WORK GLOVES TO PRO- TECT HANDS FROM SHARP EDGES.

A. Raise cutter using tractor 3-point lift and

SECURELY BLOCK INTO POSITION.

B. Set parking brake, turn off tractor and remove key

C. Remove bolts, nuts and lockwashers, securing blade and blade support bar to blade mounting bar. Remove blade and blade support bar.

D. Install new blade(s) and reinstall blade support bar(s) as shown in Figure 4-2. Be sure that blades are installed with offset in proper direction. Tighten retaining bolts to 76 ft./lbs.

Figure 4-2

BELT DIAGRAM