Belt Adjustment, Belt Replacement | Bush Hog MP5, MP6 guide

4-3 BELT ADJUSTMENT

4-4 BELT REPLACEMENT

Belt tensions should be checked every 40 hours to get maximum life from drive belts and best perfor- mance from the cutter. Belt tension is adjusted by increasing or decreasing the length of the spring on the moveable idlers. For proper belt tension on the mower, the spring lengths should be set at 2-7/8”. (Figure 4-2) To adjust the spring length, loosen or tight- en the 3/8” hex nuts on the spring adjustment rod until the correct spring length is reached.

Figure 4-2 3/8” Hex Nuts - Spring Length Adjustment

Figure 4-3

Use only genuine Bush Hog replacement parts. It is not necessary to replace both belts if only one is worn.

A. Remove right and left side shields.

B. Relieve spring tension by loosening the two 3/8” hex nuts on each spring adjustment rod. (Figure 4-2)

C. Remove old belts.

D. Install new belts as shown below. (Also refer to the decal on underside of belt shield)

1.Belts must be installed at the same time. One belt cannot be installed and tightened down before the other.

2.Disconnect the upper adjustment rod from the upper idler assembly.

3.Place both belts into the respective grooves on the driving sheave.

4.Work the lower belt over the other sheaves. After the lower belt is in place, complete the installa- tion of the upper belt.

5.Connect the upper adjustment rod and the upper idler assembly.

6.Tighten the compression springs on the upper and lower drives to 2-7/8” long. Tighten the jam nuts on the adjustment rods.

7.Replace all shields before operating machine. Upper Idler Assembly

UPPER BELT DIAGRAM

Upper Adjustment Rod

Driving Sheave

At Gearbox

LOWER BELT DIAGRAM