TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 406 of 1015

TM 9-2320-272-24-1

3-12. AIR CLEANER INDICATOR AND TUBE MAINTENANCE

THIS TASK COVERS:

a. Testing

c. Cleaning and Inspection

b. Removal

d. Installation

INITIAL SETUP:

APPLICABLE MODELS

All

TOOLS

General mechanic’s tool kit (Appendix E, Item 1)

MATERIALS/PARTS

Two locknuts (Appendix D, Item 313)

Antiseize tape (Appendix C, Item 72)

REFERENCES (TM)

EQUIPMENT CONDITION

l

Parking brake set (TM 9-2320-272-10).

l

Hood raised and secured (TM 9-2320-272-10).

l

Left splash shield removed (TM 9-2320-272-10).

GENERAL SAFETY INSTRUCTIONS

When cleaning with compressed air, wear eyeshields

and ensure source pressure does not exceed 30 psi

(207 kPa).

TM 9-2320-272-10

TM 9-2320-272-24P

1.

2.

3.

4.

5.

6.

NOTE

Perform step 1 for M939/A1 series vehicles.

Remove nut (3), screw (6), and extension tube cap (2) from extension tube (5).

Start engine (TM 9-2320-272-10) and run at 1,200 rpm.

Cover 90 percent of intake extension tube (5) opening with cardboard (4).

Observe filter indicator (1) to ensure red band is visible. If red band is visible, indicator (1) works

properly. If not, replace indicator (1).

Remove cardboard (4) and reset indicator (1) (TM 9-2320-272-10) if working properly.

NOTE

Perform step 6 for M939/A1 series vehicles.

Install extension tube cap (2) on extension tube (5) with screw (6) and nut (3).

3-42