SO-412 Mounting Base

Pressure source (connect to filter inlet)
A. Engines
1. Most in-line engines have several pipe plugs running along the oil gallery.
2. On engines with a “V” design, look for oil pressure plugs near the standard factory full-flow oil filter mount.
3. Look for the dash mounted oil pressure gauge, and trace the line back to the engine if oil pressure plug is not found. It is best not to install filter inlet hose to the same port which the gauge is connected to, as this sometimes causes a lower pressure reading on the gauge.

Caution: Never use any oil line going to or from the turbo charger as a delivery source for the filter base, as serious damage could occur! Also note the filter oil flow (approximately .75 gpm) should not exceed 10% of engine oil pump flow.

B. Lube systems (In-plant machinery, rock crushers, etc.)
1. Most of these systems have external oil pressure plugs. Look for the oil pressure gauge to help guide you.
2. Check the machine’s operation/service manual for the location of pressure ports

C. Hose and fittings
1. Use ¼” I.D. hose with a minimum rating of 200 psi
2. Connect to inlet port on filter base

Return line source (connect to filter outlet)
A. Return port
1. Return line should go directly back to the crankcase or oil reservoir.
2. Look for extra plugs in the crankcase oil pan, oil fill tube, reservoir, or drill and tap a new hole.
3. Do not “T” into some other return line on the component unless it is done right at the reservoir, and the opening is large enough to handle the extra 1 gpm flow from the filter base without creating back pressure.

B. Hose and fittings
1. Use ½“ I.D. hose with a minimum rating of 200 psi
2. Connect to outlet port on filter base

Selecting a mounting location for the filter base
A. Screw element onto base for total dimension.
B. Mount vertically or horizontally.
C. Place unit so changing element will be as easy as possible.
D. If component is operated in extreme cold weather, consider mounting in heated or protected area.
E. Before mounting, check for adequate clearance for element removal.
F. Keep hose length to a minimum.

Oil sampling
A. Take oil sample at the time of installation
1. Make sure the oil is hot!
2. If oil is to be changed at time of installation, get a sample of the oil before it is changed.

B. Take regular oil samples
1. Engines- every 250 hours.
2. Machinery- every 250 hours or longer when practical.
3. Always use an independent lab for analysis.

Optional indicator gauge
A. Apply marker tape at point 25 psi above reading at working temperature with a clean element.

Example: If normal pressure reading at working temperature is 40 psi, add 25, and then apply tape at 65 point on pressure gauge face.

B. When pressure gauge reaches this marked point, element should be replaced.

Port “A” is outlet port, 1/2” npt
Port “B” is gauge port, 1/4” npt
Port “C” is oil sample valve port, 1/8” npt
Port “D” is inlet, 3/8” npt
Ports “C” and “D” are common. Either port may be used as inlet on 2nd, or 3rd bases only in a multiple element application.