ELECTRICAL--AIR BOX HEATER

TM 9-2350-238-20-1

2-11. TROUBLESHOOTING INFORMATION (CONT).

Table 2-3. UNIT TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

64. WHINING NOISE THAT CHANGES IN PITCH WITH ENGINE SPEED WHILE VEHICLE IS

NOT MOVING.

Check voltage regulator ground strap for bad connection.

Step 1.

Clean voltage regulator ground strap with crocus cloth (item 10, appx C).

Tighten ground connection.

If problem still exists, notify direct support maintenance.

Step 2.

65. CLICKING SOUND WHEN VEHICLE IS MOVING.

Inspect radio static suppression spring in each roadwheel hub cap for broken or missing

helical springs.

Replace radio static suppression springs as required. Refer to page

66. TOO MUCH RADIO INTERFERENCE WHEN ENGINE IS NOT OPERATING

Notify direct support maintenance.

ELECTRICAL--AIR BOX HEATER

67. AIR BOX HEATER PUMP MOTOR DOES NOT OPERATE WHEN MASTER SWITCH IS ON

AND PUMP AND HEATER IGNITER SWITCH IS ON.

Troubleshoot air box heater circuit. Refer to Electrical Circuit Symptom Index, page

68. AIR BOX HEATER DOES NOT BECOME WARM.

Troubleshoot air box heater. Refer to Electrical Circuit Symptom Index, page 2-92.

TRANSMISSION

69. TRANSMISSION CONSUMES TOO MUCH OIL.

Check all gaskets, joints, and plugs for signs of leakage.

Step 1.

Tighten all plugs and screws as required.

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