Table 5-2. Direct Support Troubleshooting - Continued
TEST OR INSPECTION
ENGINE - Continued
Step 1. Check radiator fluid level.
Fill if necessary (see para 4-141).
Step 2. Check fan belts.
Replace defective fan belts (see para 4-131).
Step 3. Check the thermostat and seals.
Repair or replace as necessary (see para 4-136).
Step 4. Check radiator core for obstructions.
Step 1. Check freeze plugs (four on each side of engine) for coolant leaks.
Replace defective freeze plugs (cup plugs) (see para 6-8).
Step 2. Check water pump impeller for looseness. Drain coolant below level of water pump, remove
retaining ring, pump cover and preformed packing. Try to move impeller in and out to detect
play indicating worn bearings, gears, or seal.
Remove damaged water pump (see para 5-25).
Replace or repair water pump (see para 5-25).
LOW OIL PRESSURE
Step 1. Check for clogging of oil pump inlet screens. Remove oil pan (see 5-27).
Remove and clean oil pump inlet screens (see para 6-44).
Replace damaged screens (see para 6-44).