Hijet compression Problems


Hello, I reacently purchased a Hijet lifter tipper at a auction, it said that it needed a timing belt so I took it apart and the belt was no good. I put a new one in according to the manual lining up the timing marks. As far as I can tell the timing is on but I have no compression in any of the cylinders. I do not Know the year but the engine is a EB-90. I pulled the rocker arm cover and all valves are opening and closing. Any advice would be appreciated. Thanks, Tom.