TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 292 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cent)

Table 2-9. Troubleshooting (Cent)

TA1S8056

Malfunction

Test or Inspection

Corrective Action

MATERIAL HANDLING CRANE (M977, M985, M984E 1 ) (CONT)

$. BOOM OPERATES ABNORMALLY, SLOWLY, WILL NOT TELESCOPE IN OR OUT, OR RAISE

OR LOWER (CONT).

BOOM SECTIONS

977 SHOWN

M984E1 SIMILAR

Step 3. If boom operates abnormally, check for dry boom sections.

TELESCOPE boom OUT. Check lubrication in boom sections. Lubricate dry

sections (LO 9-2320-279-12).

M977, M985

SHOWN

M984E1 SIMILAR

HIGH

PRESSURE

HY:,DR~E:LIC

TA18S051

Step 4. Check for clogged high pressure hydraulic filter (para 19-17).

Service high pressure hydraulic filter (para 19-17).

Step 5. Check for faulty hydraulic system operation.

Refer to HYDRAULIC SYSTEM Troubleshooting.

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