TM 5-4310-452-14
4-41. OIL PRESSURE SWITCH REPLACEMENT.
This Task Covers:
a.
Removal
c.
Installation
b.
Inspection
Initial Setup:
Equipment Conditions:
Tools/Test Equipment:
• Engine off.
• General mechanic's tool kit
• Battery cables disconnected (see paragraph
Multimeter
4-57) .
• Left door assembly open.
a. REMOVAL
NOTE
Identify and tag electrical leads before removal.
1.
Disconnect 2 electrical leads (2) from oil pressure switch terminals (3).
2.
Unscrew and remove oil pressure switch (1) from elbow (4).
b. INSPECTION
1.
Connect oil pressure switch (1) to a controlled
pressure source. Connect multimeter terminal leads
to oil pressure switch terminals (3).
2. Apply pressure slowly from controlled source to oil
pressure switch (1) while monitoring multimeter. Oil
pressure switch should close at 12 psi (83 kPa) and
indicate continuity on multimeter.
3. Decrease pressure slowly. Oil pressure switch (1)
should open at 8 psi (55 kPa) and multimeter should
indicate no continuity (infinite ohms).
4. If oil pressure switch (1) does not close or open as
indicated, replace oil pressure switch.
c.
INSTALLATION
1.
Install oil pressure switch (1) in elbow (4).
2.
Connect 2 electrical leads (2) to oil pressure switch terminals (3).
TA505471
4-83
