Bush Hog Essential Maintenance for ATH 720, FTH 600 Models: Belt Diagrams & Parts Guide

40HOURS

7.Spindle Assembly - Apply multi-purpose grease with grease gun until grease purges out relief hole. Grease fittings for spindles should be accessed by removing the plastic plugs in the shields. After completing lubrication, replace plastic plugs..

Figure 4-1C

(7) 40 Hours

3/8” Hex Nuts - Spring Length Adjustment

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 moveable idler. For proper belt tension on the 48” mower, the spring length should be set at 7-1/16”. For proper belt tension on the 60” mowers, the spring length should be set at 6-5/8”. For proper belt tension on the 72” mowers, the spring length should be set at 7-7/8”. (Figure 4-1C). To adjust the spring length, loosen or tighten the 3/8” hex nuts on the spring adjustment rod until the correct spring length is reached.

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 diagrams 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 the belt by adjusting the length of the spring on the moveable idler. The correct spring lengths are 71⁄16”, 65⁄8”, and 77⁄8” for the 48”, 60” and 72” mowers respectively.

F. Replace right and left side shields.

FTH 480 BELT DIAGRAM

FRONT

BELT INSTALLATION GUIDE

ATH/FTH 600,720 BELT DIAGRAM

FRONT

BELT INSTALLATION GUIDE

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