Skytrak 6042 Service Manual User Manual download pdf (Page 84)

Boom

3.38

Model 6042 Legacy Origin 7/02

13. Make sure that both extend chains have been

inspected before installing them on the inner boom.

Refer to Section 3.4.1, “Boom Chain Inspection.”

Note: ALWAYS replace elastic-lined nuts with new

elastic-lined nuts to help ensure proper fastening.

14. Lay the two extend chains (Fig. 3-82, 1) on the top

of the inner boom with the threaded clevis ends (2)

toward the rear of the boom. Coat the threads on

each clevis with multi-purpose grease, and insert the

clevis’ through the holes in the anchor plate. Install a

3/4" flat washer (3), saved, onto each clevis. Install a

new 3/4-16 elastic locknut (4) onto each clevis.

Tighten the elastic locknut far enough so the threads

are even with the top of the locknut.

Figure 3-82 Extend Chains

15. At the rear of the inner boom, place the male ends of

the hoses (attachment tilt and optional auxiliary

hydraulics) inside the inner boom. Be sure the hoses

are coiled up and inside the boom completely.

16. Spray the wear pad pathways on the underside of

the inner boom with LPS3 or equivalent.

17. Using a hoist capable of lifting 5,000 lbs (2268 kg)

and slings lift the inner boom. Carefully slide the end

of the boom into the front of the intermediate boom.

Push the boom in as far as possible.

18. Assemble the side wear pads to the intermediate boom:

Note: Shim ALL side wear pads as needed to maintain

a total minimum gap of .07-.13" (1,8 to 3,3 mm) in the

horizontal direction.

a. Slide the inner boom over to one side as far as it

will go, to allow wear pad installation.

b. Place the wear pad inserts (Fig. 3-83, 1), saved,

into the cavities of the side wear pads (2), saved.

Place the shims (3), saved if present, onto the

wear pad and align the holes.

c. Apply Loctite

242 threadlocker to the threads of

the 3/8-16 x 3/4" capscrews (Fig. 3-83, 4), saved.

Slide the wear pad (2) with shims (3) between the

inner boom and the intermediate boom with the

offset of each wear pad the same as noted in dis-

assembly. Align the holes and secure in place

with the capscrews (4), 3/8" lockwashers (5),

saved, and 3/8" flat washers (6), saved. Be careful

not to push the wear pad inserts out of the wear

pads.

d. Torque all wear pad mounting capscrews to

31 ±3 lb-ft (42 ±4 Nm).

e. Fill all wear pad cavities with a good grade of

lithium-based EP grease.

f. Repeat Steps a-e to install the side wear pads on

the other side of the intermediate boom.

Figure 3-83 Intermediate Boom Front Side Wear Pads

19. Install the top wear pads to the inside of the

intermediate boom:

a. Place the wear pad inserts (Fig. 3-84, 1), saved,

into the cavities of the top wear pads (2), saved.

Place the shims (3), saved if present, onto the

wear pad and align the holes.

b. Apply Loctite

242 threadlocker to the threads of

the 3/8-16 x 1-1/2" capscrews (Fig. 3-84, 4),

saved. Slide the wear pads (2) and shims (3) with

the spacers (5), saved, between the inner boom

and the intermediate boom, with the offset of

each wear pad the same as noted in disassem-

bly. Align the holes and secure in place with the

capscrews (4) and 3/8" lockwashers (6), saved.

Be careful not to push the wear pad inserts out of

the wear pads.

MA10,0620

MA10,0430

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Skytrak 6042 Service Manual User Manual Page 84

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