Onan 200 DFP - Crankcase Breathers

Engine Oil Change
1. Bring the engine up to operating temperature and
then shut it off.
2. Remove the oil drain plug or open the drain valve
and collect the engine oil in a pan. When the crank¬
case is drained, replace the oil drain plug or close
the drain valve. Torque the oil drain plug to 60-70 ft.
lb. (81-95 N#m).
3. Fill the crankcase to the full mark on the dipstick.
Allow for oil filters when drained or if changed.
4. Start the engine and check for oil leaks.
5. Shut off the engine and wait 15 minutes before
checking the oil level. Add oil if required.
Crankcase pressure can blow out hot
oil and cause serious burns . Do NOT
the generator set is operating.
Oil Filter Change
Replace every oil change or when differential pressure
across filter reaches 15 psi (103.5 kPa).
To change filter, proceed as follows—
1. R e m o v e drain plug (see Figure 7) and allow oil to
drain.
2. Loosen capscrew at base of filter case and remove
assembly from engine. Remove filter element.
Before discarding element, inspect for metal particles indicating
internal failure. Notify engine manufacturer if found. Wrinkles on
outside wrapper and waviness or bunching on pleats indicates
moisture in oil. This is an indication that engine weekly exercise
period is too short. Engine is not run long enough for full heat
saturation. Moisture will also combine with sulphur in the oil to
form sulphurous acid.
3. Discard filter element, remove and discard oil seal
ring from filter head.
4. Clean filter case; reinstall drain plug.
Onan recommends that small oil rings (2) at bottom of filter be
replaced every second oil change to prevent leakage due to
hardening.
5. Position element end seals and install new filter
element over spring support.
6. Position new seal ring on filter case, then insert
element. Position to filter head and secure center
capscrew. Torque 25 to 35 lb. ft. (34 to 47 N*m).
7. Fill crankcase to “H” mark on dipstick, run engine to
verify no oil leaks, shut down engine and add oil as
necessary.
Always allow 15 minutes after engine shutdown before checking
oil level. This will give oil time to drain back into the crankcase.
FIGURE 7. LUBRICATION OIL FILTER
CRANKCASE BREATHERS
Remove and clean the crankcase breathers at the inter¬
val specified in the maintenance table.
To Service
1. Remove wing nut, flat washer and rubber washer
holding cover, lift cover and swing away from filter
assembly (see Figure 8).
2. Lift out breather element, vapor element and gasket.
3. Clean all parts with approved solvent. Dry with
compressed air (30 psi maximum [OSHA]).
4. Inspect all parts, replace if necessary.
5. Reassemble filter assembly, replace cover and
secure.
breather r\ r)
TUBE
AWARNING
check oil while
FIGURE 8. CRANKCASE BREATHER FILTER
17