Skytrak 6036 Service Manual Bedienungsanleitung PDF herunterladen (Seite 27)

Section 3 Boom

3-9

6036/6036T S/N 9B0500 thru 14833

3.1.4 Chain Replacement

Two chains extend the inner boom and one chain

retracts it.

Extend Chains

IMPORTANT: Replace extend chains in pairs or

sets ONLY.

a. Removal

1. Fully retract the boom.

2. Remove the rear boom cover.

3. Refer to Fig. 3.11 and remove the extend chain

locknut and flat washer securing each chain

clevis to a block at the upper rear of the inner

boom.

4. Remove the locknut and shoulder screw that

attaches each extend chain to the yoke at the

front of the boom.

5. Pull the chains out the front of the boom.

6. Remove a chain clevis at both ends of each

chain.

b. Installation

1. Be sure the boom is fully retracted.

2. Install a chain clevis on both ends of each

chain.

3. Working from the rear boom cover opening,

remove both top intermediate boom wear pads

to gain access to rear boom chain connection.

4. Using a long rod or other suitable tool, route the

chains between the upper plates of the inner

and intermediate booms to the front boom

opening. Make sure chains are not twisted.

5. Route the chains over the chain sheave and

attach the chains to the front yoke with a

shoulder screw and locknut. Tighten the

locknut completely, then back off 1/4 turn.

6. Secure the rear of the chain to a block at the

upper rear of the inner boom with a flat washer

and locknut. The elastic collar on the locknut

must engage the chain clevis by at least one

full thread. Be sure locknuts are tightened

equally.

7. Check the position of the chain yoke at the

front of the outer boom. The front of the yoke

must be parallel to the front face of the outer

boom. If not, adjust the locknuts accordingly.

8. Refer to paragraph 3.1.5 and lubricate the

chain.

9. Refer to paragraphs 3.1.6 and 3.1.7 and check

and adjust the chains.

Retract Chain

a. Removal

1. Fully retract the boom.

2. Remove the rear boom cover.

3. On the underside of the outer boom, remove

the outer boom retract chain locknut and flat

washer, Fig. 3.11, securing the retract chain to

a chain support plate at the underside of the

outer boom.

4. Remove the inner boom retract chain locknut

and flat washer (S/N 2515 & Before) attaching

the retract chain clevis to a block at the lower

rear of the inner boom. For S/N 2516 & After

remove the shoulder screw and locknut from

the mount plates.

5. From the rear outer boom cover opening, pull

the retract chain from the space between the

outer and intermediate booms.

6. Remove a chain clevis from each end of the

chain.

b. Installation

1. Be sure the boom is fully retracted.

2. Install a chain clevis on each end of the chain.

3. Refer to paragraph 3.1.5 and lubricate the

chain.

4. Secure the rear of the chain to a block at the

lower rear of the inner boom with a flat washer

and locknut (S/N 2515 & Before). Route the

chain around the chain sheave. The elastic

collar on the locknut must engage the chain

clevis by at least one full thread. For S/N 2516

& After secure the chain clevis to the mount

plates with a shoulder screw and a locknut.

5. Using a long rod or other suitable tool, route the

chain between the lower plates of the outer and

intermediate booms to the chain support plate

opening, Fig. 3.11, on the bottom of the outer

boom.

6. Secure chain clevis to the chain support plate

using a flat washer and locknut. Torque the

locknut to 35 to 40 lb-ft (47,5 to 54,2 Nm).

7. Refer to paragraphs 3.1.6 and 3.1.7 and check

and adjust the chain.

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