Table 4-2. Unit Preventive Maintenance Checks and Services - CONT.
Hr - Hours
MO - Months
ltem to Be
Check rotor tines for wear. Check attaching locknuts for tightness
Drain and change lube oil in drive assembly housing (para 4-27).
Section I. Check that operating temperature of the range box is
between 100°to 180°F (38°C - 82°C).
Drain and fill with gear oil. Refer to Chapter 3, Section I..
Check for leaking oil seals. Check for damaged axle housing. Drain
Section IV. UNIT TROUBLESHOOTING.
4-12. TROUBLESHOOTING INTRODUCTION.
This section contains step by step procedures for identifying, locating, and isolating equipment malfunctions.
4-13. TROUBLESHOOTING SYMPTOMS.
Table 4-3 lists the most common malfunctions found during operation of the vehicle. Tests or inspections and
corrective actions should be performed in the order listed. This symptom index lists corrective actions that can be
performed by unit maintenance. If a malfunction is not listed, or corrective action fails to correct a problem, notify
direct support maintenance.
4-14. UNIT TROUBLESHOOTING PROCEDURES.
Pages 4-14 through 4-153 contain the malfunctions listed in Troubleshooting Symptom Index (Table 4-3), test or
inspection instructions required to determine cause of malfunction, and corrective actions for repairing the faulty
equipment. Operator Troubleshooting Procedures (Table 3-2) should be completed before performing Unit