CHAPTER 1. INTRODUCTION - TB-9-2320-279-340011

TB 9-2320-279-34

CHAPTER 1

INTRODUCTION

1-1. PURPOSE.

This bulletin supplements instructions contained in TB 43-0142 by establishing specific load test procedures

for the vehicle cranes listed in the title.

1-2. SCOPE.

This bulletin tells how to prepare test weights and load test the vehicle cranes listed in the title. These

instructions supplement the regular services and inspections described in the HEMTT technical manuals

and are to be employed to safety certify applicable HEMTT cranes.

1-3. REQUIREMENTS FOR LOAD TESTING.

Load testing of cranes is required before initial use of all new cranes, cranes that have been extensively

repaired, cranes that have undergone modification or alteration, and cranes that have remained idle six or

more months. Load testing will be accomplished by support maintenance activities unless manufacturers,

repair-contractor or depot, as appropriate, provides written certification that testing has been conducted.

Additional load testing may be scheduled, as established locally, based on type of materials handled,

equipment utilization and local requirements or conditions.

1-4. REQUIREMENTS FOR TURNTABLE BEARING INSPECTION PROCEDURE.

GROUND CONDITIONS AND LEVELING OF THE CRANE.

a. Park the truck on a level surface and use a carpenters level and the crane outrigger system to level the crane

from side to side. Rotate the crane as necessary to obtain a surface on the superstructure that can be used to

place the level.

CLEANING BEFORE INSPECTION.

b. Surfaces where magnetic base mounts and dial indicator plunger or telescope gage indicates off of must be

free of grease and dirt, and must be smooth. Clean surfaces as required and if needed, use sand paper to smooth

out the surfaces. Surfaces that are not clean or are rough will affect the true dial indicator reading or telescope

gage reading.

Change 1

1-1/(1-2 blank)