SERVICE
Service - 18
Belt Replacement
1. Park the power unit on a level surface and
engage the parking brake.
2.
Shut off the power unit engine and remove the
key from the key switch.
3. Remove the belt cover (A) from the stump grinder.
4.
A
Loosen the four nuts on the cutter head bearings.
5. Loosen the locking nuts on the right and left
adjustment plates and loosen the adjustment
nuts to release belt tension.
6. Remove the old drive belts and install the new
drive belts onto the pulleys. Replace all three
drive belts at the same time. NOTE: due to
manufacturing tolerances on the belt length, if
possible choose three belts that are closest in
length to each other.
7.
Tighten the belts as specified in the belt tension
adjustment section.
8. Tighten the adjustment plate locking nuts and
the cutter head bearing nuts.
9. Reinstall the belt cover.
Cutter Teeth Rotation & Sharpening
The cutter teeth (KC180 serial # 1231 and higher)
have three shoulders. If a tooth becomes dull or dam-
aged, loosen the top nut, tap the tooth down, rotate
the tooth 1/3 of a turn, and retighten the top nut.
Torque to 25 ft-lbs (34 Nm).
Cutter teeth can be sharpened with the proper equip-
ment. Sharpening carbide teeth requires a special
process. See your authorized Ventrac dealer for
replacement parts or instructions for sharpening exist-
ing teeth. Teeth that have lost more than 1/8” (3 mm)
of original bite must be replaced.
Lubrication Locations
Lubrication is required at the following locations
using a lithium complex NLGI #2 grease. Refer to
the maintenance schedule for service intervals and
amount of grease.
Checking Gearbox Oil Level
1. Clean the top of the
A
gearbox and remove
the breather plug (A)
from the top port.
2. Check the oil level
in the gearbox. The
oil level should be
maintained at approxi-
mately half full. If oil
level is low, add 80-90
synthetic gear oil until
the proper level is
reached.
3. Reinstall the breather
plug into the top port of the gearbox.
Changing Gearbox Oil
1. Clean the top and bottom of the gearbox.
2. Remove the breather plug from the top port of
the gearbox.
3. Place a drain pan beneath the gearbox.
4. Remove the pipe plug from the bottom port of
the gearbox and allow the gear oil to drain.
5. Reinstall the pipe plug into the bottom port of
the gearbox.
6. Add 80-90 synthetic gear oil until the proper
level is reached.
7. Reinstall the breather plug into the top port of
the gearbox.
