HOSE AS 3904694 - Caterpillar

Damped Control Head Adjustment should be done at this time
14. Disconnect and plug the brake to the front drum, at the torque hub. Plug the fitting.15. Raise the REAR of the machine and support it on stands, so the drum is 50 to 76 mm (2 to 3 in) off the floor. Make sure the drum can turn freely. Mark the edge of the drum for use in counting the drum revolutions.16. Remove the two 4000 kPa (600 psi) pressure gauges and install two 2000 kPa (300 psi) pressure gauge at ports X1 and X2.
Hydraulic directional control valve
(2) Eccentric adjustment screw. (4) Control valve spool. (5) Piston. (6) Spring. (7) Piston. (8) Spring. (9) Shim. (10) Damped adjustment screw. (11) Lock nut.17. Loosen lock nut (11) approximately one half turn.18. While holding the lock nut, Turn damped adjustment screw (10) until approximately seven threads are exposed beyond lock nut (11). Tighten lock nut (11).19. Start the machine, set the travel speed switch to the LOW RANGE position.20. Move the propel lever forward to maximum forward travel speed. Turn the (ASC) knob clockwise until the forward pressure gauge reads 1200 kPa (175 psi). Leave the (ASC) control in this position. For all machines that are equipped with the Automatic Speed Control (ASC).21. Move the propel lever rearward to maximum reverse travel speed. The reverse pressure must match the forward pressure within 30 kPa (4 psi). Adjust the speed control balance orifices if required.
Propulsion hand control lever group (on test bench)
(12) Speed control balance orifice adjuster B. The adjuster "A" (on back side of valve) is for forward and "B" is for reverse.22. The speed control balance orifices can be adjusted as follows: a. To raise the reverse pressure, loosen the lock nut and turn "B" adjuster (12) counterclockwise.b. To lower the reverse pressure, loosen the lock nut and turn "B" adjuster (12) clockwise.23. Move the propel lever forward to maximum forward travel speed. Verify the control pressure is at 1200 kPa (175 psi). Time the