Skytrak 6042 Service Manual User Manual download pdf (Page 530)

100

101

Stabil-TRAK™ System

10.24

Model 6042 Legacy Origin 7/02

10.5.13 Hydraulic Circuit Operation -

Locked Mode, Frame Sway Left

a. Conditions

• Boom angle is above 40°

• Park brake ON, or service brake ENGAGED, or travel

select lever in (N) NEUTRAL

b. Operation

When the joystick control is placed in the frame sway mode,

cables activate the frame sway valve in the main control

valve assembly. As the joystick is moved to the right, the

frame sway spool valve is shifted, allowing oil to flow

through the valve, through the check valve with a .047"

orifice disk (Fig. 10-28, 1), through the check valve (2) to

the base end of the frame sway cylinder (3).

Some of this oil is diverted to the pilot line of the check

valve (Fig. 10-28, 4) on the return side of the frame sway

cylinder, opening the valve.

Oil from the rod end of the frame sway cylinder flows,

through the check valve (Fig. 10-28, 4) opened by

incoming pilot pressure oil, through the check valve with a

.040" orifice disk (Fig. 10-28, 5), to the FTR port of the

Stabil-TRAK™ manifold.

Oil entering at port FTR flows through solenoid valve 3

(Fig. 10-28, 6 and Fig. 10-29, 6) through check valve

2B (7), to the rod end of the stabilizer cylinder (8). Some

of this oil is diverted to the pilot line of check valve 2A

(Fig. 10-28, 9 and Fig. 10-29, 9), opening the valve.

Oil from the base end of the stabilizer cylinder flows through

check valve 2A (Fig. 10-28, 9 and Fig. 10-29, 9) and

through a .030" orifice (10). This orifice slows the

movement of the frame sway. The oil then flows through

solenoid-operated valve 3 (6), through port V, to the

frame sway spool valve in the main control valve. Oil

flows through the valve, dumping the returned oil to the

reservoir.

Pressurized oil entering the Stabil-TRAK™ manifold at

port P is stopped at the four closed solenoid-operated

valves 4A (Fig. 10-28, 11 and Fig. 10-29, 11), 4B (12),

12A (13), and 12B (14).

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Skytrak 6042 Service Manual User Manual Page 530

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