ACS2711-2715-HeaderReplace your worn or broken tachometer cable on your Allis Chalmers tractor with our new replacement cables. ACS2711 (D21, 170, 175, 190, 190XT, 210, 220 – All w/ alternator driven tachometer) and ACS2715 (180, 185, 200 alternator driven tachometer; 190, 190XT gas, tachometer driven off camshaft) are made to OEM specifications and are a fraction of the OEM prices.