Briggs & Stratton MB (18 HP) Lawn Mower User Manual


 
41
Maintenance Instructions LUBRICATION/CLEANING
Transaxle Oil Filter Location
3. Reinstall drain plugs.
4. Place 6” (15 cm) block under the left hand drive
wheel.
5. Remove the oil reservoir hose attached to the
elbow on top of the transaxles and remove the
elbows to access the oil fill openings.
6. Fill the transaxles with 20W-50 (API Service
Class SL or higher) oil through the opening
where the elbows were. Fill up to the opening.
7. Before reinstalling the elbows, screw the locking
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).
8. Reinstall the elbows. When the elbow begins to
be snug, position the elbow as it was when
removed and tighten the lock nut.
9. Remove the block from the left wheel and reat-
tach the reservoir hoses to the transaxles.
10. Fill both reservoirs to 1” (25 mm) with 20W-50
(API Service Class SL or higher) oil.
11. Start and drive the unit for 1- 2 minutes.
12. If the transaxles sound noisy or have poor steer-
ing response, recheck oil level in both
transaxles by removing the elbows (check oil
level at fill opening).
13. If oil needs to be added refer back to steps 5-12.
Transaxle Drain Plugs
(view from underside of tractor)
CLEANING
Engine Air Cooling System
To prevent engine overheating and possible engine
damage, clean grass clippings, chaff and dirt from
the rotating engine air intake screen every 8 hours of
operation. In certain mowing conditions (dry grass,
leaves, tree "cotton", etc.) it may be necessary to
check and clean this area several times each day to
prevent engine overheating. Also, visually check
inside cylinder head shroud and between cylinder
head fins for material packed in this area which
would prevent cooling airflow; remove shroud and
clean as required.
IMPORTANT: Yearly or every 100 hours, remove
engine cooling shroud and clean cylinder head cool-
ing fins to prevent overheating. Make sure cooling
shroud is reinstalled properly.
Keep Engine Screen Clean
Use 3/8" hex wrench
to remove filter
Drain Plugs
Rotating Engine Screen