3.1.5
Testing Cooler Bypass Pressure
IMPORTANT:
Make sure you check CP and CR pressure after installing the new Oil Bypass Cooler kit, and adjust as necessary.
1.
To measure CR pressure, attach a 7000 kPa (1000 psi)
pressure gauge to the test fitting at port CRG (A).
2.
To measure CP pressure, do one of the following:
• Attach a 7000 kPa (1000 psi) pressure gauge to the
test fitting at port CPG (B);
OR
• Attach a flow meter capable of reading flow as high
as 106 lpm (30 gpm) and a 7000 kPa (1000 psi)
pressure gauge between port CP and cooler. The
test equipment must attach to the #12 JIC fitting at
port CP on the cooler bypass manifold.
3.
Start engine and run at high idle (wide open throttle)
until hydraulic oil temperature is between 57–63°C
(135–145°F ). If using a flow meter, the reading should
be between 83–98 lpm (22–26 gpm).
4.
Record CP and CR pressures. CP pressure should be
between 3447–4171 kPa (500–605 psi).
5.
If CP pressure is not between 3447–4171 kPa
(500–605 psi), adjust pressure by removing cap (C)
and increasing or decreasing cooler bypass setting by
turning adjustment screw.
NOTE:
CR pressure is not adjustable.
6.
When CP pressure is in the correct range, subtract the
CR pressure reading from the CP pressure reading.
The differential pressure should range between
552–1380 kPa (80–200 psi). A differential pressure
lower than 552 kPa (80 psi) indicates a possible
defective hydraulic cooler.
Figure 3.13: Hydraulic Ports on New Cooler
Bypass Manifold
147611
14
Revision B
Summary of Contents for M205
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