Bush Hog HDTH5, Operator'S Manual

Page: 141 / 174

HDTH 5 & 6 Finish Mower 08/21
Maintenance Section 5-7
© 2021 Alamo Group Inc.
MAINTENANCE
MAINTENANCE
BELT REMOVAL, REPLACEMENT and ADJUSTMENT
The mower drive belt should be checked after every 40 hours of use for unusual wear, cracking, fraying or pieces
missing. Belts that are too loose or too tight will not give good service and will not last as long. Replacing and /or ad-
justing belt should be performed using maximum cauton. Protective shielding will need to be removed to replace the
belt or adjust the belt tension.
Belt Removal and Replacement (Figure 5-7)
Note: Use only Genuine Bush Hog Belts for replacement. Will Fit (after market belts) may not meet the re-
quirements for usage in belt life and mower performance.
1. Park the mower on a firm level surface. Lower the implement to the ground. Shut the tractor down, set parking
brake and dismount.
2. Disconnect the driveline from the input shaft of the gearbox on the mower.
3. Remove the two outer belt shields and the center shield, retain the fasteners for re-installation.
4. Relieve the tension on the belt by loosening the two 3/8” hex nuts on the tensioner rod.
5. Remove the old belt.
6. Install the new belt referring to (Figure 5-7) for correct belt routing. There is also a decal on the mower deck you
may refer to showing the correct belt routing.
7. Refer to (Figure 5-8) Belt Adjustment for correct setting of belt tension.
Belt Ajustment (Figures 5-7 & 5-8)
Tension on the mower belt is achieved by tightening the
3/8” hex nut against the tensioner bracket until the proper
spring length is reached. This length is measured from
the center of the spring attaching hole of the tensioner
rod to the center of the mounting pin on the idler arm. The
spring length should be set to between 7” to 7½” as
shown in (Figure 5-8).
Loosen the outer 3/8” hex nut on the tensioner rod and
then turn the hex nut aginst the tensioner bracket to
lengthen or shorten the spring length. When the proper
length is set, turn the outer hex nut to contact adjusting
nut to lock the position.
Tensioner
Bracket
3/8” Hex
Nuts
7” to 7½”
(Figure 5-8)
3/8” Hex Nuts
Tensioner
Rod
Tension
Spring
Belt Tension
Idler Arm
Stationary Idler
(Figure 5-7)
FRONT
Belt