TM 9-2320-386-10 2-9 2-4. SPECIAL PURPOSE KITS CONTROLS AND INDICATORS a. A-frame Kit. Installed on ESP vehicles equipped with a front winch for load- ing and unloading equipment. A-frame load limit is 3,000 lb (1,362 kg). Key Item and Function 1 Tube and leg assemblies are attached to lifting shackle brackets and apex spreader to form an A-frame for lifting. 2 Apex spreader positions the A-frame and supports the sheave assembly. 3 Sheave assembly supports front winch cable in the lifting position. 4 Plate assembly protects cable assembly and truck bed from wear and distor- tion. 5 Cable assembly is attached to A-frame and inverted pintle hook to maintain the A-frame in a 60° angle position. 1 1 3 2 4 5