Gehl Z27 Operator's Manual page 201

8) When mounting the filter, turn it 2/3 of a turn after the
seal surface has contacted with the filter mount.
9) After replacing the oil filter (cartridge), supply engine oil
to the upper limit mark on the oil dipstick through the oil
supply port (F).
Refer to Section "21. Fueling, Oiling and Greasing
Based on Temperature Range" for the oil to be used.
10) Idle the engine for several minutes and then stop the
engine. Then check that the oil level exceeds the mid-
point between the upper and lower limit marks on the
oil dipstick.
Refer to Section "25-3. Checking before start-up".
11) Install and tighten the oil supply port cap securely.
12) Mount the cover under the body.
Replace the engine oil and the oil filter element 6 months
after the previous replacement, even if the service hours
have not reached 250 hours.
Also replace them at 250 service hours, even if 6 months
has not elapsed since the previous replacement.
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25. Procedures for Maintenance
(F)
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