TM 9-2320-361-20 MECHANICAL SYSTEMS TROUBLESHOOTING SYMPTOM INDEX (Contd) MALFUNCTION No. MALFUNCTION TROUBLESHOOTING PROCEDURE PAGE 60. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. 76. 77. 78. 80. 81. 82. NON ELECTRICAL GAGES Speedometer or tachometer bounces, noisy, or inoperative. . . . . . . . . . Air pressure gage inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FIFTH WHEEL Trailer will not hitch to fifth wheel. . . . . . . . . . . . . . . . . . . . . . . . . . DUMP BODY (M342A2) Dump body will not raise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dump body does not lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dump body does not hold in raised position . . . . . . . . . . . . . . . . . . . Hydraulic pump noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tailgate does not open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EARTH BORING AND POLESETTING (M764) Earth boring machine will not operate . . . . . . . . . . . . . . . . . . . . . . . Earth boring machine cannot be moved vertically . . . . . . . . . . . . . . . Earth boring machine cannot be moved horizontally. . . . . . . . . . . . . . OUTRIGGERS (M764) Outriggers inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outriggers operate slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FUEL TANK (M49A2C) Fuel does not pump from compartments, or pumps slowly. . . . . . . . . . Delivery pump dispenses fuel slowly from both tanks. . . . . . . . . . . . . Fuel does not pump or pumps fuel slowly from selected tank, and fuel drains slowly from selected tank using gravity procedures . . . Fuel tank compartments cannot be suction filled . . . . . . . . . . . . . . . . WATER TANK (M50A2 AND M50A3) Water cannot be pumped from both tanks . . . . . . . . . . . . . . . . . . . . . Water cannot be pumped or pumps slowly from selected tank, and water drains slowly from selected tank using gravity procedures. . Water pumps out of both tanks slower than normal . . . . . . . . . . . . . . Water tank compartments cannot be suction filled . . . . . . . . . . . . . . . PERSONNEL FUEL BURNING HEATER/POWER PLANT HEATER KIT Heater will not operate in high or low position. . . . . . . . . . . . . . . . . . Heater will not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 2-44 2-45 2-45 2-45 2-45 2-46 2-46 2-46 2-46 2-46 2-47 2-47 2-47 2-47 2-48 2-48 2-49 2-49 2-49 2-50 2-50 2-50 79. 2-27