Scag Power Equipment STT - Manual (Page 37)

Section 7
33
C. Changing Hydraulic Oil Filter Element
The hydraulic oil filter should be changed after every 500
hours of operation or annually, whichever occurs first.
1. Remove the oil filter element (Figure 7-3) and
properly discard it. Fill the new filter with clean oil
and install the filter. Hand tighten only.
2. Run the engine at idle speed with the speed control
lever in neutral for five minutes.
3. Check the oil level in the hydraulic tank. It must be
3" inches from the top of the filler neck. If
necessary, add SAE 20w50 motor oil.
7.4 ENGINE OIL
A. Checking Engine Crankcase Oil Level
The engine oil level should be checked after every 8
hours of operation or daily as instructed in the Engine
Operator’s Manual furnished with this mower.
B. Changing Engine Crankcase Oil
Figure 7-4 Engine Fill Stick
390S0156
ENGINE OIL
DIPSTICK
Figure 7-3 Hydraulic Oil Filter
After the first 5 hours of operation, change the engine
crankcase oil and replace the oil filter. Thereafter, change
the engine crankcase oil after every 100 hours of operation
or monthly, whichever occurs first. Refer to the Engine
Operator’s Manual furnished with this mower for
instructions.
Figure 7-5 Drain Plug and Oil Filter Location
C. Changing Engine Oil Filter
After the first 20 hours of operation, replace the engine oil
filter. Thereafter, replace the oil filter after every 200
hours of operation or every month, whichever occurs
first. Refer to Engine Operator’s Manual for
instructions.
7.5 ENGINE FUEL SYSTEM
STT99CEC
ENGINE OIL FILTER
DRAIN
PLUG
390S0155-1
HYDRAULIC
OIL FILTER
To avoid injury from burns, allow the mower to
cool before removing the fuel tank cap and
refueling.
CAUTION: