Maintenance Instructions
41
MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MBSY
Service Item
Daily
25
Hours
100
Hours
200
Hours
400
Hours
Yearly
Every
2 Years
Ref.
Page
Check Engine Crankcase Oil Level
x
43
Check Coolant Level in Radiator
and Overflow Tank
x
55
Clean Radiator Screen and Cooling Fins*
x
51
Check Security of Air Filtration Components
x
56
Check Air Filter Restriction Gauge
x
49
Clean Grass Buildup Under Deck
x
52
Check Transaxle Cooling Fan Condition
x
54
Service Mower Blades
x
57
Check Function of Warning Lights and Horn
x
25
Lubricate Grease Fittings and Oil Points*
x
45
Check Battery Electrolyte Level
x
56
Check Transaxle Oil Level (in Reservoir)
x
45
Check Tire Pressure
x
56
Check Drive Belts (Engine Alternator,
Engine PTO, Ground Drive)
x
58
Check Operation of Safety Interlock Switches
x
59
Check Operation of Turbine Precleaner Fan*
x
49
Check Air Filter Element**
x
50
Change Engine Crankcase Oil***
x
44
Check Engine Alternator Belt Tension
x
55
Check Blade Brake Action
x
58
Check Security of Drive Tire
Mounting Nuts (75 to 85 ft-lbs.)
x
24
Check FSC Friction Lock
x
59
Change Engine Oil Filter
x
44
Check Radiator Hoses and Clamps
x
58
Change Transaxle Oil and Filter
x
48
Replace Fuel Filters (2)/Clean Water Separator
x
65
Replace Air Filter Element
and Dust Ejection Valve**
x
50
Check Fuel Lines and Clamps
x
58
Flush Radiator and Change Coolant
x
52
Service Battery
x
56
Check PTO U-Joints for Wear/Looseness
x
58
Adjust Engine Intake/Exhaust Valve Clearance
x
Δ
Replace Radiator Hoses and Clamps
x
58
Replace Fuel Lines and Clamps
x
58
Lap Engine Intake/Exhaust Valve
Seats (if required)
x
Δ
∗
More often in extremely dusty or dirty conditions
(Refer to notes about air cleaner element in
IMPORTANT TIPS FOR CARE OF THE
YANMAR ENGINE)
∗∗
Air cleaner is remote mounted Enginaire
™
unit,
replace filter(s) every 400 hours and dust ejection
valve every two years or when worn or damaged
∗∗∗
Change engine oil and filter after first 35 hours
of operation of a new engine (break-in period)
Δ
See Authorized Yanmar Engine Dealer for this service
CAUTION
When performing maintenance with the
tractor body raised, a safety prop should
be installed from back of body to chassis
frame (fail-safe protection in case of fail ure
of body lift support).
CAUTION
Maintenance procedures requiring special training or
tools should be performed by a trained technician.
