MTD 450 Series Shop Manual page 64

For Parts Call 606-678-9623 or 606-561-4983
450 Series Tillers
Symptom
Chain case binds in any
drive mode that powers
the wheels.
Chain case leaks
60
Troubleshooting Chart
Cause
1 - 3. The wheel axle is
binding in the case.
4. Rusted chain
1. Phase separation of
grease
2. Leaky shaft seal
3. Breach of chain case
housing
www.mymowerparts.com
Cure
1. Install the wheel axle so that
the weld bead on the shaft
nests into the concave side of
the spacer. The spacer
should be in the lower half of
the chain case on assembly.
2. Make sure the wheel axle
bearings are fully seated. In
some cases the shaft may be
driven with a heavy hammer
and a soft drift to seat the
bearings without disassem-
bly. Use hammer prudently.
3. If the whole wheel axle
assembly is installed back-
ward, the shaft will bind,
accompanied by chain clatter.
4. Replace rusted chain. If
water has gotten in the case
to rust the chain, there will
usually be other damage.
1. After sitting for a season, the
grease in the case may sepa-
rate. In most cases, running
the tiller will re-mix the
grease, and the leak will stop.
2. Replace the seal if it is dam-
aged. Unless physical dam-
age to the seal is visible, this
will usually be a case of
phase separation. Check the
condition of the shaft.
3. Housings are unlikely to leak
unless they have been dam-
aged. Clean the case and
confirm the exact location of
the leak before disassem-
bling and re-sealing the case.