MOTOR & MTG GP-HYDRAULIC FAN 2616123 - Caterpillar

Illustration 6 g06012461
"All Stabilizer Lower" control button on the machine control panel.
Push the "All Stabilizer Lower" control button to lower all the stabilizers to the ground.
Lower the work tool to the ground.
Place the hydraulic activation control lever in the LOCKED position.
Stop the engine.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Illustration 7 g03644979
Load sensing signal pressure tap is located behind the right side access door.
Connect tooling (A2) 0 kPa to 41,368 kPa (0 psi to 6,000 psi) pressure sensor to the load sensing signal pressure tap.Test Procedure
To avoid system damage, make sure that the hydraulic pump is properly filled with hydraulic oil before start-up.
Start the engine.
Illustration 8 g01162712
Place the hydraulic activation control lever in the UNLOCKED position.
Set the engine rpm on the "Engine Status" display screen.
Illustration 9 g06012487
To access the "Engine Status" display screen, press the "Machine Status" button (F2) from the main display screen.
Press the "Engine Status" button (F2) from the "Machine Status" screen.
Use the "UP" and "Down" buttons to change engine speed by the "Throttle Rate" Change percentage.
Use the "OK" button to toggle the "Throttle Rate Change" between 10% and 1%.
Set the engine speed to the specification in Table 1 of this procedure.
Illustration 10 g03645027
View of upper main control valve.
(1a) Boom (retract)
(1b) Boom (extend)
(2a) Work tool open (retract)
(2b) Work tool close (extend)
(3a) Stick (retract)
(3b) Stick (extend)
(4a) Boom (retract)
(4b) Boom (extend)
(5) Work tool rotate (CW/CCW)
(6) Cab lift (for/aft)
(7) Cab lift (up/down)
(8a) Stick (extend)
(8b) Cooling function (non-functional)
Illustration 11 g03644983
View of lower main control valve.
(9a) Steering (left cylinder extend / right cylinder retract)
(9b) Steering (left cylinder retract / right cylinder extend)
Slowly operate the circuit that is being tested to the full EXTEND position or full RETRACT position and hold.
Check the pressure for the circuit that is being tested at the load sensing signal diagnostic port.Note: Refer to Table 1 in this procedure for the correct pressure.
If the signal pressure is not correct, refer to the "Adjustment Procedure".Adjustment Procedure
Adjust the pressure for signal limiter pressure reducing valve that is being tested by slowly operating the circuit to the full EXTEND position or full RETRACT position and hold.
Personal injury or death can result from sudden machine