Skytrak 6042 Service Manual User Manual download pdf (Page 355)

8.123

Model 6042 Legacy Origin 7/02

Hydraulic System

5. Use a pin spanner wrench to unthread the head

gland (Fig. 8-81, 9) from the tube (2). The head

gland is installed at a torque of 300-400 lb-ft

(407-542 Nm), so a considerable amount of force is

required to remove it. Carefully slide the head gland

down along the rod toward the eyelet end, away from

the cylinder tube.

IMPORTANT: Protect the finish on the rod at all times.

Damage to the rod can cause premature seal failure.

6. Carefully withdraw the rod (Fig. 8-81, 10) straight

out of the tube (2). Keep the rod straight during

withdrawal to help avoid scratching, nicking or

damaging the tube.

IMPORTANT: When sliding the rod and piston assembly

in the tube, DO NOT damage the piston (Fig. 8-81, 12)

by scraping it against the threads in the tube. Keep the

rod in line with the tube to prevent binding.

7. Secure the rod eyelet and remove the locknut

(Fig. 8-81, 11) from the threaded end of the rod.

Discard the nut; a new nut will be required for

reassembly.

Note: Heating the nut to approximately 300° F (150° C)

may also be required to break the seal formed by the

Loctite Threadlocker #271 (red) applied to the nut when

installed. The application of significant force is required

to overcome the 1,100-1,250 lb-ft (1.492-1.695 Nm) of

torque the nut was tightened to when originally installed.

8. Remove the piston (Fig. 8-81, 12) from the rod (10).

9. Remove the small o-ring (Fig. 8-81, 13) from the

piston. Remove both precision wearbands (14) and

the capped T-seal (15) from the piston (12).

Note: The T-seal actually consists of four components; a

wide, flexible inner band, the flexible T-seal band itself,

and two supportive split caps that mount on either side of

the “T” seal band.

10. Remove the head gland (Fig. 8-81, 9) from the rod (10).

11. Remove the o-ring (Fig. 8-81, 16), the back-up ring

(17) and the o-ring (18) from the head gland (9).

12. Remove the heavy-duty rod wiper (19). Remove the

precision wearband (Fig. 8-81, 20) and deep Z-seal

with rod back-up (21) from inside the head gland (9).

Note: Discard all seals and o-rings. ALWAYS replace

seals, o-rings, gaskets, etc. with new parts to help

ensure proper sealing and operation.

c. Stabilizer Cylinder Internal Cleaning

1. Remove all hydraulic fluid, dirt and debris from the

inner surface of the cylinder.

2. Discard all seals, back-up rings and o-rings. Replace

with new items from the complete seal kits

(Fig. 8-81, 22) to help ensure proper cylinder

function.

3. Clean all metal parts with an approved cleaning

solvent such as trichlorethylene. Carefully clean

cavities, grooves, threads, etc.

d. Stabilizer Cylinder Inspection and Repair

1. Inspect all parts for wear and damage. If inner

surfaces of the cylinder (Fig. 8-81, 1) DO NOT

display an ultra-smooth, polished finish, or are

damaged in any way, replace the damaged part.

Often, dirty hydraulic fluid causes failure of internal

seals and damage to the polished surfaces within

the component.

2. Inspect the inside of the tube (Fig. 8-81, 2) for

scoring and other damage. If the tube is damaged,

replace it with a new tube.

3. Remove small scratches on the rod or inside of the

tube with very fine grit emery cloth. Use the emery

cloth in a rotary motion to polish out small

imperfections in the metal and blend scratch(es) into

the surrounding surface.

4. Clean the parts with trichlorethylene after repair.

5. Check that the rod (Fig. 8-81, 10) is straight. If the

rod is bent, install a new rod.

e. Stabilizer Cylinder Assembly

Note: Follow Section 8.13.3, “General Cylinder

Assembly Instructions.”

1. Install the deep Z-seal with rod back-up (Fig. 8-81, 21)

into the head gland (9), orienting the edge (23).

2. Install the precision wearband (Fig. 8-81, 20) into

the head gland (9).

3. Install the heavy-duty rod wiper (Fig. 8-81, 19) with

the raised portion of the wiper lip seal (24) oriented

toward the rod eyelet. The wiper lip should be toward

the outer end of the head gland and the seal lips

toward the inner end of the head gland. Use tools

that will not damage the seals.

1 2 ... 350 351 352 353 354 355 356 357 358 359 360 ... 543 544

Comments to this Manuals

No comments

Skytrak 6042 Service Manual User Manual Page 355

Comments to this Manuals

Related products and manuals for Special machinery Skytrak 6042 Service Manual