Lubricating Oil System Diagnostic
Checking (2-01)
1. This procedure describes a test for the operation of the
lubricating oil systems for the N14 engine model.
NOTE: This procedure requires the use of 15W-40 engine
oil and the oil sump temperature to be 79 to 96°C [175 to
205°F].
2. Install a pressure gauge of known accuracy in the oil
rifle to confirm the cab pressure gauge reading. At
high idle the rifle pressure must be 240 to 310 kPa [35
to 45 psi]. At low idle the rifle pressure must be at or
above 69 kPa [10 psi] at 93°C [200°F].
NOTE: If oil rifle pressure exceeds specifications, check the
main oil pressure regulator, signal line, viscosity sensor
(STC engines only), and orifice. Refer to Procedures 2-15,
2-16, and 2-18.
NOTE: If the oil rifle pressure is below 69 kPa [10 psi] at
93°C [200°F] maximum and is within specifications at high
idle, proceed to step 6.
3. If the oil rifle pressure is below specifications, install
a pressure gauge of known accuracy on the oil cooler
filter outlet passage. The filter outlet oil pressure at
high idle must be as follows:
• 1200 RPM Rating - 207 kPa [30 psi] minimum al-
lowable.
• Rated RPM Rating - 241 to 310 kPa [35 to 45 psi].
Section 2 - Lubricating System Lubricating Oil System Diagnostic Checking (2-01)
N14 Page 2-15
To Next Page
Loading...
