Anyone know where to find a belt diagram for an 87-89 Ford 460 7.5L 4 barrel holly gas engine with V-Belts in a Coachman Royal RV on a John Deer chassis 1 on top 4 off the crank and 3 off the fan.?

Answer 1

I am looking for the same information and the only diagram I found that is close is from Chiltons 87-93 Ford Full Size Truck manual. The diagram is for the 7.3L diesel but the layout for A/C, alternator, pwr strg, air pump and fan looks just like my 88 motorhome 460 layout. This engine does use V-belts and not a serpentine belt like all the listed gas engines for these years. I plan to try and install new belts tomorrow using this diagram and a little trial and error to see what works. I'll let you know.

My motorhome is an 87 Ford chassis used to make an 88 Honey motorhome. I have the same 460 Ford but my crank pulley has space for 3 belts, 1 for the pwr strg, 1 for the A/C and the outer 1 for the alt. The A/C and pwr strg are both laid out for 2 belts but only one will fit. I used the general layout for the 7.3 L diesel as mentioned. I measured the actual belt length and looked on Dayco's web site to find the right length and width belts. I installed a 15570 around the crank, fan and A/C with tensioner. I intalled a 15550 around the pwr strg, fan and crank. The alt belt only goes around the crank and there is another belt from the alt to the air pumps. Both of these belts were OK and not replaced. I have looked all over for a diagram and found none in any book or at Ford. My Ford chassis and engine were modified at the motorhome co. and there is no documentation anywhere about it. I installed the new belts and all the components on my 460 work great.