OSS DISABLES FUNCTIONS (CONT). -726250801

TM 9-2320-364-34-1

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical

circuits a direct short may result. Damage to equipment, injury or death to personnel may result.

Do not stand under crane. Mechanical failure and operator error can cause injury or death to personnel.

NOTE

Record any adjustment made to gear

assembly and length trimpot. The number

of gear teeth moved or turns of trimpot

screw may be necessary information for

later steps.

Adjustment made in Step (3) may be

affected by adjustment made in Step (6).

ADJUSTMENT TEST

(1) Using TELE control lever, retract

boom completely if not already done

(TM 9-2320-364-10).

(a) If test unit does not indicate 7.3

ft (2.2 m), go to Step (2) below.

(b) If test unit indicates 7.3 ft (2.2 m),

go to Step (5) below.

(2) Loosen screw on gear assembly and

slide gear assembly away from idler

gear being careful not to move gears

in relation to each other.

(3) Rotate gear assembly gear to the right

to increase test unit reading or to the

left to decrease test unit reading.

Moving the gear one to two teeth in a

particular direction will increase or

decrease test unit reading 0.1 to 0.2 ft

(.03 to .06 m).

(4) Mesh gear assembly gear and idler

gear and tighten screw when test unit

indicates 7.3 ft (2.2 m).

(a) If it is not possible to adjust

gear assembly enough that test

unit indicates 7.3 ft (2.2 m),

replace OSS box (Para 6-8).

(b) If test unit indicates 7.3 ft (2.2 m),

go to Step (5) below.

(5) Using TELE control lever, extend

boom completely.

(a) If test unit does not indicate 22.5

ft (6.86 m), go to Step (6) below.

(b) If test unit does indicate 22.5 ft

(6.86 m) go to Step 14 of this

Fault.

(6) Adjust length trimpot until test

unit indicates 22.5 ft (6.86 m).

(a) If it is not possible to adjust

length trim pot enough that test

unit indicates 22.5 ft (6.86 m),

replace OSS box (Para 6-8).

(b) If test unit indicates 22.5 ft

(6.86 m), go to Step (7) below.

(7) Repeat Steps (1) through (6) a

maximum of two more times to

achieve a consistent reading of 7.3

ft (2.2 m) (retracted) and 22.5 ft

(6.86 m) (extended) without needing

adjustment.

Continued on next page.

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