Ryan, it should be in your manuals also. This is from 2006. The flow (3. 5 to 4. 0 GPM) is more important than the pressure (1800 ± 50 psi) on a diesel. Without the pressure/flow tool you will be hard pressed to determine the flow.
FLOW AND PRESSURE TEST
1. Check the power steering belt to ensure it is in good condition and adjusted properly.
2. Connect pressure gauge hose from the Power Steering Analyzer to adapter 6826.
***actually, this goes to the test valve end
3. Connect tube 6825A to Power Steering Analyzer test valve end.
***actually, this tube goes to the test gauge side
4. Disconnect the high pressure hose from the power steering pump.
5. Connect the tube 6825A to the pump fitting.
6. Connect the power steering hose from the steering gear to the adapter 6826.
NOTE: If fluid leaked from the steering system, it should be filled to correct lervel prior to starting the
engine.
7. Open the test valve completely.
8. Start engine and let idle long enough to circulate power steering fluid through flow/pressure test gauge and to get
air out of the fluid. Then shut off engine.
9. Check fluid level, add fluid as necessary. Start engine again and let idle.
10. Gauge should read below 862 kPa (125 psi), if above, inspect the hoses for restrictions and repair as necessary.
The initial pressure reading should be in the range of 345-552 kPa (50-80 psi).
***I initially got a reading of 125 psi. Seemed a little high. I bypassed the Magnafine filter and cooler and ran the return line out of the steering box straight to the reservior. Dang, that fluid gets hot quick.
Bypassing the filter and cooler dropped the idle psi to 95/100 psi.
11. Increase the engine speed to 1500 RPM and read the flow meter. If the flow rate (GPM) is below specification,
(refer to pump specification chart for GPM) the pump should be replaced.
***@1500 rpm = 200 psi/3. 5 gpm. At the lower end but within spec.
CAUTION: The following test procedure involves testing maximum pump pressure output and flow control
valve operation. Do not leave valve closed for more than three seconds as the pump could be damaged.
12. Close valve fully three times and record highest pressure indicated each time. All three readings must be
above specifications and within 345 kPa (50 psi) of each other.
***closed valve at 1500 rpm 3 times= 1790 psi +/- within 50 psi of each other. Within spec.
² Pressures above specifications but not within 345 kPa (50 psi) of each other, replace pump.
² Pressures within 345 kPa (50 psi) of each other but below specifications, replace pump.
13. Open the test valve and turn the steering wheel to the extreme left and right positions three times against the
stops. Record the highest pressure reading at each position. Compare readings to the pump specifications
chart. If pressures readings are not within 50 psi of each other, the gear is leaking internally and must be
replaced.
*** against stops 3 times= 1800 psi 3. 5 gpm
CAUTION: Do not force the pump to operate against the stops for more than 2 to 3 seconds at a time
because, pump damage will result.
PUMP SPECIFICATION
ENGINE RELIEF PRESSURE ± 65 FLOW RATE (GPM) AT 1500 RPM
1500 series 11032 kPa (1615 ± 65 psi) 3. 1 - 3. 5
2500 & 3500
series
12400 kPa (1800 ± 50 psi) 3. 5 - 4. 0