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The recording speedometer/tachometer described in post 14 requires the appropriate dashboard/instrument panel to fit it as it is bigger than the separate instruments found in cargo trucks and such. Recording speedometers are unique to 818 tractors issued to line haul units which kept track of...

If it is the engine side noise could be coming from governor which is mounted on the firewall. If on interior side check low air alarm pressure switch. Air leaks can be detected with windex or soapy water which will blow bubbles in presence of air leak. Just for giggles, is the power take off...

Reference post 46: compressed air is a means of storing and moving energy. A M816 has an engine driven air compressor, a governor to control it, a reservoir to store air which must be drained after use to expel moisture, valves to control the windshield wipers, pressure switches for the low air...

The wires are identified with metal clips with the circuit numbers embossed on them. On any vehicle that has the same circuit it will be identified with the same number. A the lighting is essentially the same except for the length of the wires you can refer to almost any circuit diagram to...

Reference post 37: from top to bottom: service taillight. 2 bulbs, smaller one is for tail light, larger 2 filament bulb is stoplight/turn signal. Army uses the turn signal circuit in tandem to operate brake lights. Unlike a commercial truck, there is no separate brake light circuit. Next is...

Reference post 31: If you cannot get all the lights to work by pushing the various buttons on the switch you need a new light switch. Get one with the levers, it is a direct interchange. I think the center button on the push button switch turns it on, then push the button for the lights you...

Lights: All tactical vehicles have two independent lighting systems controlled by one switch so only one can be used at any time. The small lights at the bottom of the composite light are black out marker lights. There are two white lights on the front lamps and four red lights on the rear...

Post 20: the pictured light switch was a replacement geniuses in TACOM dreamed up to replace the original lever operated switch. One drawback was you had to see it to figure out where it was set or change it. It was also somewhat unreliable and I am informed several electrical fires were...

The applicable TMs for a M 816 are: TM9-2320-260- 10, operators manual, -20 organizational maintenance manual, -20P organizational parts book, -20LO - lubrication order. There are almost 100 grease points on a M816; neglect them at your own peril. 4 on the handbrake alone. As post 2 suggests...