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P 13 

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FIGURE 1, M7-22 SECTIONS 
OF MAIN CONTROL VALVE

Jam Nut

Port Relief

 

NOTE

To get proper pressure from the Port Reliefs, it may be necessary 
to turn the POR inward on the implement pump. See Figure 2 on 
Page 1 for POR location on implement pump.

Port Reliefs should be 500 psi higher than the working pressure 
in the valve section.

EXAMPLE

If the implement pump valve LS Relief pressure is 4200 psi, set 
the Port Relief pressure to 4700 psi.

3.  Back out the Port Relief until the needle on the gauge starts to move and

 tighten the jam nut once the relief is properly 

set. See Figure 1 above.

4.  Reset the Pump POR and LS settings as necessary.

LS Relief, PORT B
LS Relief, PORT A

FIGURE 2, MAIN CONTROL VALVE SECTIONS

Port Relief

LS Relief

Jam Nut

ADJUSTING THE PORT RELIEFS ON THE M7-22 MID-SECTION PROCEDURE END

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Some operators prefer having more speed while in driving Turtle mode. Turning the Min. Displacement screw clockwise 
increases user speed while in Turtle mode.

The adjustment screw is located on the track drive motor, forward/center inside. See Figure 1 on the next page.

TL/TN-775 M

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Summary of Contents for TL775 Series

Page 1: ...Most Trusted and Versatile Company in the Industry By the Most Trusted and Versatile Company in the Industry 2021 MY 2021 MY L9 Cummins Engine Trusted Most By The Forestry Industry L9 Cummins Engine T...

Page 2: ...PAGE INTENTIONALLY LEFT BLANK...

Page 3: ...ssures Section 8 9 Disc Saw Pump Set up Section 9 SHOVEL LOG LOADER SET UP ORDER 1 Setting LS Load Sense Stand By on Implement Pump Section 1 and Auxiliary Pump Section 2 2 Setting Charge Pressure Sec...

Page 4: ...LS Relief 4200 Implement Pump POR 4600 Swing Pump POR 5200 Swing Pump Main Reliefs 5800 Track Drive Pump POR 5500 Track Drive Pump Main Reliefs 6000 NOTE Set LS with LS line removed and plugged and Pu...

Page 5: ...gure 1 2 Warm the machine hydraulics to operating temperature of 140 F 60 C 3 Warm engine coolant temperature to operating temperature IMPORTANT FOR PRESSURE CHECKS A 10 000 PSI DIGITAL PRESSURE GAUGE...

Page 6: ...ion M7 22 M4 15 2 Remove the LS line from the implement pump See Figure 2 above 3 Start the machine and install the pressure gauge on the implement pump gauge port 4 Run the machine at 1500rpm 5 Adjus...

Page 7: ...ad Sense Existing Connection at Tee Load Sens Gauge Port 6 CAP Load Sense Hose Line Shown removed from Imp Pump FIGURE 1 AUX PUMP LS CONNECTIONS 3 Start the machine and run at 1500rpm SETTING AUXILIAR...

Page 8: ...the LS Line that was disconnected earlier on to the auxiliary pump See Figure 2 below for port location 4 Set pressure to the setting spec d on Page A3 of this procedure 5 Install the gauge used earli...

Page 9: ...f adjustment is needed turn the SQ1 Cartridge clockwise to increase pressure and counter clockwise to decrease See Figure 1 for SQ1 Cartridge location NOTE Charge manifold may vary per machine model S...

Page 10: ...e you to the FANS FULL ON OFF menu option On the right side of the screen select the function Then select the ON function FIGURE 3 IQAN MENU OPTION STEP 4b ADJUST OPTION STEP 4c OPERATOR ADJUSTMENTS O...

Page 11: ...roperly 10 Install the gauge used earlier into the MLS 1 Module Load Sense port on the main control valve See Figure 1 on Page 1 for MLS 1 port location Bottom out the stick boom and set to the correc...

Page 12: ...E All M4 15 port reliefs are adjustable on the Rexroth main control valve except the leveling reliefs 2 Bottom out the function to be set Read gauge and set A or B port to the pressure needed IMPORTAN...

Page 13: ...e swing pump turn the POR Pressure Valve counterclockwise gently until it bottoms out See Figure 1 above 3a Once bottomed out turn clockwise 1 4 turn to back the system out IMPORTANT GULLWING SWITCH M...

Page 14: ...e and adjust as necessary following the same procedure as the previous steps ADJUSTING THE POR PRESSURE SETTING 6 Turn the Swing Pump POR Valve clockwise to raise the pressure or turn counter clockwis...

Page 15: ...y in See Figure 1 above for location IMPORTANT DO NOT BOTTOM OUT WHEN TURNING THE POR HIGH SIDE VALVE IN 4 Once the POR is all of the way in back out 1 2 turn 5 Start the machine check the gauge and e...

Page 16: ...igure 1 on the previous page for POR Valve location SETTING THE TRACK DRIVE POR VALVE PRESSURE 1 Ensure the Parking Brake is off 2 Pick one of the two pumps tracks to start with Set the POR Valve pres...

Page 17: ...re on the IQAN display in the cab to check and verify 600 psi has been removed from pump See Figure 1 for DS Gauge Port location SETTING THE SHIFT POINT PRESSURE 3 To set shift point follow the instru...

Page 18: ...needle on the gauge starts to move and tighten the jam nut once the relief is properly set See Figure 1 above 4 Reset the Pump POR and LS settings as necessary LS Relief PORT B LS Relief PORT A FIGUR...

Page 19: ...igure 1 for screw location 3 Raise one track off the ground and time how long it takes for that track to make a complete revolution 4 Turn the displacement screw inward on the raised track and calcula...

Page 20: ...rt location on motor FIGURE 1 MH TEST PORT AT TRACK DRIVE MH Test Port at Track Drive M1 Port Track Drive Motor Motor Shift Hose FIGURE 2 TRACK DRIVE MOTOR 6 Once the gauge is installed on the track d...

Page 21: ...n the provided Recommended Pressures chart on Page A3 at the beginning of this procedure 8 Reinstall the Motor Shift Hose removed from the track drive motor in STEP 1 9 Repeat process for the track ci...

Page 22: ...E STYLE 24533 ES 7 FUSE ATO 5 AMP SPADE STYLE 24534 ES 1 FUSE ATO 7 5 AMP SPADE STYLE 24512 ES 8 FUSE ATO 10 AMP SPADE STYLE 50400 ES 6 FUSE ATO 15 AMP SPADE STYLE 50401 ES 1 FUSE ATO 30 AMP SPADE STY...

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