TERMINAL-BLADE 7Y3951 - Caterpillar

Swash Plate #1 (Test Mode 5) & Swash Plate #2 (Test Mode 6) Health Check
Note: The "Health Check" test procedure can be accessed through the Monitor or Cat® Electronic Technician (Cat ET) Service Tool. The following steps show the steps to access the "Health Check" procedure via the Monitor.
Illustration 3 g06041761The "Device Test" menu is located under "Service" that is selected from the "Main Menu."
Illustration 4 g06041768When the "Device Test" menu is selected, the following options are presented:
Variable Relief Valves
Attachment Valves
Health Check
Illustration 5 g06041776When the "Health Check" menu is selected, the following options are presented:
Boom Circuit #1
Boom Circuit #2
Stick Circuit #1
Stick Circuit #2
Swash Plate #1
Swash Plate #2
Manual Valve
Select "Swash Plate #1" or "Swash Plate #2"
Click the "OK" button to begin the test process.
Set the hydraulic lock lever to the unlocked position.
Hydraulic oil temperature must be between 40° C (104° F) and 60° C (140° F).
Move the machine to level ground. Place the stick and bucket cylinder in the minimum retract position and lower the boom until the linkage is resting on the ground. Press "OK" to continue.
Illustration 6 g06043295
Set the solenoid (electrical) current for "Pump 1" at 50% (minimum speed). Use the "Slide Bar" to increase or decrease pump flow if needed. Press "OK" to continue.
Illustration 7 g06043300
Press the DOWN arrow on the touch pad during Step 7.
Note: Move any implement control input to the extreme position to begin the calibration. Releasing the control before the calibration is complete will cause the calibration to abort.
Illustration 8 g06043302
View the "Pump #1 Solenoid Current Percentage", if the pump is operating correctly, the reading should closely match the setting during Step 5.
The "Health Check" test is active. Observe the pump pressure on the monitor or in Cat ET. To reset pump flow or exit the test, release the lever.Note: If there is a significant difference between actual pump displacement position (%) and solenoid current (%), the pump has an issue.
Table 1
ACS Valve Inspection Table
Potential Source of Root Cause Health Check Test Mode
Boom Circuit #1 (1) Stick Circuit #1 (2) Boom Circuit #2 (3) Stick Circuit #2 (4) Swash Plate #1 (5) Swash Plate #2 (6) Manual Valve (7)
Bypass 1 X X X
Bypass 2 X X X
Main Relief X X X X X
Warm Up 1 X X X X
Warm Up 2 X X X X
Straight Travel X
Combiner X
Pump 1 X X
Pump 2 X X The table above shows the possible root causes. By conducting a combination of "Health Check" tests the technician can better determine which component has an issue.For Example: If "Test Mode 1" passes with no errors and the results from "Test Mode 3" show an error, the "Warm Up 2" is the root cause of the issue.For Test Modes 5 & 6: Actual pump displacement position is shown on the monitor when the test is started. Check