TM-9-2320-428-10

TRUCK, CARGO, 8X8, M977

TECHNICAL MANUAL; OPERATOR'S MANUAL

JUNE 2009

TM-9-2320-428-10 - Page 665 of 1072

3.

Operate engine (WP 0044) for 20 minutes with PTO enabled to bring hydraulic fluid

up to operating temperature.

4.

Attempt to raise or lower boom. (WP 0042)

CONDITION/INDICATION

Does boom raise or lower normally after running engine for 20 minutes with PTO

engaged?

DECISION

No - Test 2 - Does boom raise or lower normally after cycling mast?

Yes - Problem corrected.

TEST 2 - Does boom raise or lower normally after cycling mast?

1.

Lower crane to stowed position. (WP 0042)

2.

Operate MAST control DOWN. (WP 0042) Hold MAST control DOWN for

approximately 30 seconds, then return control to NEUTRAL position. Repeat

procedure several times until hydraulic fluid is warmed.

TM 9-2320-428-10

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