Unit Mechanical Troubleshooting - continued

TM 9-2320-386-24-1-1

0010 00

Unit Mechanical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

17. EXHAUST FUMES IN CAB

Step 1. Inspect exhaust pipes and connections for leaks.

a. Tighten connections if loose.

b. Replace damaged parts (WP 0066 00).

Step 2. Inspect exhaust manifold and turbocharger for leaks.

If leaking, notify direct support maintenance.

END OF TESTING!

ETHER START SYSTEM

WARNING

Ether is extremely flammable. Do not perform ether start system testing

procedures near fire. Injury to personnel may result.

18. ENGINE CRANKS BUT WILL NOT START IN COLD WEATHER (FUEL SYSTEM OPERATING PROPERLY)

Step 1. Check quick-start cylinder.

a. Remove quick-start cylinder (WP 0055 00 or WP 0059 00) from valve, shake quick-start

cylinder, and listen for liquid splashing inside cylinder.

b. Replace quick-start if cylinder is empty (WP 0055 00 or WP 0059 00).

Step 2. Check quick-start valve for proper operation.

a. Disconnect tubing at quick-start valve.

b. Press quick-start switch, hold for 2 to 3 seconds, then release. A small amount of ether

should be released by quick-start valve.

c. If ether is not evident, check electrical system (Electrical Troubleshooting, WP 0011 00).

d. If electrical system works properly, replace quick-start valve (WP 0055 00 or WP 0059 00).

Step 3. Check atomizer and atomizer tubing for restrictions.

a. Disconnect tubing at quick-start valve and apply compressed air to determine if system is clear.

b. If restricted, disconnect tubing from atomizer and check for restrictions in tubing.

c. If tubing is clear, replace atomizer (WP 0057 00).

d. If tubing is restricted, replace tubing (WP 0056, or WP 0060 00 if vehicle built after

serial number 504923.)

END OF TESTING!

COOLING SYSTEM

19. ENGINE TEMPERATURE GAUGE ABOVE 230F (110C)

WARNING

Use caution when removing surge tank filler cap. Steam or hot coolant

under pressure may cause injury to personnel.

Step 1. If fuel grade is incorrect, completely drain fuel system (TM 9-2320-386-10), replace fuel

filter (WP 0054 00), and replace fuel with correct grade (TM 9-2320-386-10).

Ensure engine fuel supply grade is correct for vehicle use and climatic conditions

(TM 9-2320-386-10).