Skytrak 6042 Service Manual User Manual download pdf (Page 315)

8.83

Model 6042 Legacy Origin 7/02

Hydraulic System

g. Main Control Valve Assembly

This section covers assembly of the outlet, lift/lower,

extend/retract and mid-inlet/outlet sections of the main

control valve (Fig. 8-47, 1).

Note: ALWAYS replace o-rings with new o-rings

lubricated with clean hydraulic oil to help ensure a leak-

proof seal and proper vehicle performance.

Assemble the Outlet Section

1. Assemble the outlet section (Fig. 8-47, 6) in the

reverse order from the disassembling procedure.

Refer to “Disassemble the Extend/Retract and Lift/

Lower Outlet Section” on page 8.77.

2. Screw three nuts (Fig. 8-47, 2 and 3) onto three tie

rods (4 and 5) and insert into the outlet section (6).

Assemble the Main Relief Valve (Outlet Section)

Note: There is a seal and spring kit for assembling the

relief valve.

1. Assemble the main relief valve (Fig. 8-46, 15) in the

reverse order from the disassembling procedure.

Refer to “Disassemble the Main Relief Valve (Outlet

Section)” on page 8.77.

2. Install the main relief valve (Fig. 8-47, 15) onto the

outlet section (6).

Assemble the Lift/Lower Section

1. Assemble the lift/lower section (Fig. 8-47, 28) in the

reverse order from the disassembling procedure.

Refer to “Disassemble the Lift/Lower Section” on

page 8.77.

2. Insert the shuttle (Fig. 8-47, 29), spring (30) and

poppet (31) into the section.

3. Place a new oiled o-ring (Fig. 8-47, 7) between the

outlet section (6) and the lift/lower section (28), and

slide the lift/lower section onto the tie rods.

Assemble the Extend/Retract Section

1. Assemble the extend/retract section (Fig. 8-47, 32)

in the reverse order from the disassembling

procedure. Refer to “Disassemble the Extend/

Retract Section” on page 8.79.

2. Insert the shuttle (Fig. 8-47, 33), spring (34) and

poppet (35) into the section.

3. Place a new oiled o-ring (Fig. 8-47, 36) between the

extend/retract section (32) and the lift/lower

section (28) and slide the extend/retract section onto

the tie rods.

Assemble the Mid-Inlet/Outlet Section

1. Assemble the Mid-Inlet/Outlet section (Fig. 8-47, 53)

in the reverse order from the disassembling

procedure. Refer to “Disassemble the Mid-Inlet/

Outlet Section” on page 8.79.

2. Install the shuttle (Fig. 8-47, 52) into the mid-inlet/

outlet section (53).

3. Place a new oiled o-ring (Fig. 8-47, 54) between the

extend/retract section (32) and the mid-inlet/outlet

section (53).

4. Torque the two tie rod nuts (Fig. 8-47, 4) to

43-53 lb-ft (58-72 Nm) and the third tie rod nut (5) to

66-82 lb-ft (89-111 Nm) holding all sections together.

5. Retrieve the attachment tilt, frame sway and auxiliary

assembly. Tighten the three tie rod nuts from this

assembly into the mid-inlet/outlet section. Refer to

“Assemble the Load Sense Outlet Section” on page

8.81, Step 2 for the torque values.

6. Ensure that the large o-ring in the auxiliary

hydraulics section is properly seated between the

auxiliary hydraulics section and the mid-inlet/outlet

section. Refer to “Assemble the Auxiliary Hydraulics

Section” on page 8.81, Step 4.

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Skytrak 6042 Service Manual User Manual Page 315

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