Maintenance Instructions
H37i
Lubrication
52
Transaxle Oil and Filter Change
Change the transaxle oil after the initial
break-in
period
of
75-100 hours.
Thereafter, change oil
every 400 hours
of operation as follows:
1. Thoroughly clean the exterior of the transaxle
housing before servicing. Remove expansion
reservoir cap to allow venting. Using a 1/4 in.
hex wrench, remove the plug on the lower
inside of each transaxle allowing the oil to
drain.
2. Remove the oil filter guard, remove and re-
place the oil filter using an oil filter wrench.
Tighten filter by turning filter 3/4 to 1 turn after
gasket contacts the filter base surface. Rein-
stall the oil filter guard. (Refer to
Transaxle
Oil Drain Plug, Filter, and Guard Location
illustration.)
Oil Filter
Oil Filter
Guard
Oil Drain
Plug
Transaxle Oil Drain Plug, Filter, and
Guard Location
(Shown with Deck Support Arms
Removed for Clarity)
3. Reinstall drain plugs.
4. Remove the oil reservoir hose attached to the
elbow on top of the transaxles. Remove the
elbows to access the oil fill opening.
5. Fill the transaxles with 20W-50 (API Service
Class SL or higher) oil through the opening
(where the elbows were). Fill up to the open-
ing.
6. Before reinstalling the elbows, screw the lock-
ing nut on the elbows down until they are snug
(the o-ring on the elbow will be to the bottom
of the o-ring groove).
Elbow
Screw Locking
Nut Down
Reinstall Transaxle Elbows
7. Reinstall the elbows. When the elbow begins
to be snug, position the elbow as it was when
removed and tighten the locknut. Reinstall
reservoir hoses to elbows.
8. Fill reservoir to 1/4-1/2 in. (6-13 mm) from the
bottom with 20W-50 (API Service Class SL or
higher) oil.
9. Start and drive the tractor for 1-2 minutes.
10. Check the reservoir oil level. It should be
1/4-1/2 in. (6-13 mm) from the bottom. If oil
needs to be added, refer to steps 4-10.
11. If the transaxles sound noisy or have poor
steering response, there may be air trapped in
the transaxle that needs to be purged.
To purge air from transaxle, raise the tractor
and block with tires off the ground. With
engine running, slowly move the Forward
Speed Control forward and backward 5 to 6
times. Turn off engine and check oil level and
add if needed. Repeat procedure until trans-
axles operate at normal noise levels and move
smoothly in forward and reverse.
