Skytrak 6036 Service Manual Bedienungsanleitung PDF herunterladen (Seite 29)

Section 3 Boom

Model 6036/6036T S/N 9B0500 thru 14833

3-11

Adjustment is accomplished using extend chain

adjustment locknuts, Fig. 3.14.

a. Chain Locknut Functions

Loosen extend chain locknuts to extend the inner

boom and increase extend chain sag.

Tighten outer boom retract chain locknut to retract

the inner boom and decrease extend chain sag.

b. Adjusting Procedure

1. Raise the boom to a horizontal (level) position.

Fully extend the boom, then retract it 2", which

is 1" per section (51 mm which is 25,5 mm per

section).

2. Measure sag in the extend boom chains

between the bottom of the chains and the top

of the intermediate boom at their closest point,

Fig. 3.12. Acceptable boom extend chain sag

is between 1-1/2 & 2-1/2" (38 & 64 mm). If the

measurement is less than 1-1/2" (38 mm),

adjust the boom chains as described in the

following steps.

able boom extend chain sag is between

1-1/2 & 2-1/2" (38 & 64 mm). If the chain

sag is less than 1-1/2" (38 mm) repeat

steps (a) through (c).

3. If the distance measured in Step 1 is less than

2" but greater than 1-1/2" (less than 51 mm

but greater than 38 mm):

(a) Remove the rear cover from the outer

boom and adjust the top extend boom

chains.

(b) Tighten the locknuts, Fig. 3.14, for each

chain. Be sure each locknut is tightened

equally so that chain maintains the same

tension. Equal chain tension can be

checked by observing the position of the

yoke on the outer boom, Fig. 3.13. The

front of the yoke should be parallel with

the front edge of the boom.

boom horizontal (level), fully extend the

boom and retract it 2" which is 1" per

section (51 mm which is 25,5 mm per

section).

(d) Measure the chain sag. Acceptable boom

chain sag is between 1-1/2 and 2-1/2" (38

and 64 mm). If chain sag is less than 1-1/

2" (38 mm), repeat steps (a) through (d).

(e) Replace the rear cover of the outer boom.

3.1.8 Wear Pad Replacement

After the first 50 hours of operation or when

severe wear is suspected

There are 26 wear pads (Fig's 3.3, 3.5, 3.6 and

3.8) between the outer, intermediate, and inner

booms. Five are attached to the inner boom,

thirteen to the intermediate boom, and eight to the

outer. Four additional wear pads may be used in

severe twist applications.

The wear pads and wear pads with spacers are

shimmed to maintain a gap between the wear

pads and the booms of 0.07 to 0.13" (1,8 to 3,3

mm).

OA0511

RETRACT CHAIN

LOCKNUT

EXTEND CYLINDER

Fig. 3.15 Retract Chain Adjustment Locknut

3.1.7 Chain Tension Adjustment

1. Retract the boom completely to check the

position of the inner boom, Fig. 3.11. If the

distance between the front edges of the

intermediate and inner booms is between

1-1/2 & 2-1/2" (38 & 64 mm) and the extend

chain is no closer than 1-1/2" (38 mm) from

the intermediate boom, proceed no further, the

boom chains are adjusted correctly.

2. If the distance between the front edges of the

intermediate and inner booms is 2" or more

but less than 2-1/2" (51 mm or more but less

than 64 mm):

(a) Tighten the locknut, Fig. 3.15, on the

bottom of the outer boom. This retracts

the inner boom and takes up the sag in

the extend chains.

(b) Cycle the boom in and out; then, with the

boom horizontal (level), fully extend the

boom and retract it 2" which is 1" per

section (51 mm which is 25,5 mm per

section).

Fig. 3.16 Boom Wear Pads

ANGLED

CUT

ANGLED

CUT

MA2070

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