Gehl 503Z, Operator'S Manual, Page: 95 / 132

918070/FP0811 4-5 Printed in U.S.A.
MAINTENANCE SCHEDULE
The following service schedule is a recommended. Maintenance work must be done at regular intervals. Failure to
perform scheduled maintenance work will result in excessive wear and early machine failures. The following ser-
vice schedule is a recommended.
Check, Clean and Inspect
Service Activity Daily Every 50
Hours
Every 250
Hours
Every 500
Hours
Every
1000
Hours
Customer Dealer
Engine oil level x x
Engine coolant level x x
Hydraulic oil level x x
Inspect engine/hydraulic oil radiator
and air conditioning condenser for dirt/
debris; clean if necessary x x
Inspect cooling system, heating and
hoses for leaks and pressure (visual
check)
x x
Inspect air filter for damage x x
Inspect water separator pre-filter; drain
water x x
Check V-belt condition and tension x x
Check exhaust system for damage x x
Gearbox oil level x x
Check battery electrolyte; fill with dis-
tilled water if necessary x x
Clean battery x x
Replace cab air filter for heating and air
conditioning x x
Empty diesel fuel tank
a
x x
Clean water separator x x
Inspect alternator, starter and electrical
connections, bearing play and function x x
Preheating system and electrical con-
nections x x
Check engine valve clearance; set if
necessary x x
Fuel injection pump, injection and pres-
sure, injection nozzles and valves x x
Inspect pilot control valve filter/restric-
tor; clean/replace if necessary x
Clean drain holes in cab/canopy x x
a. After emptying the tank, water must be removed and air must be purged from the fuel system before use. See “Fuel
Shut-off Valve and Water Separator” on page 4-13 and “Purging Air from the Fuel System” on page 4-13.