Well I need to know if you take the pump off a mack how to get it back in timing. My bossman just bought a R model mack wrecker with a holmes 850 on it. It has been sitting for at least 10 years id say. We can not get it to pump fuel. Just curious any suggestion that might get the pump to pump again without removing?? If not he wants to have pump rebuilt but he has never worked on a Mack motor. (he is a expert on cummins 400s and etc.). I will probaley end up doing all the work to the wrecker to get going again though. Its funny he picked the mack up with a ford l-9000 with a 238 detroit (green leaker). Pulled in the yard with the mack, next day cranked ford wrecker up and it run away. Had to pull emergency stop. First thought fuel rack hung but after pulling valve cover surprise. The keepers on one valve come loose and the valve got hung in fuel rack. Anyway he wants to fix the mack. Just a background about myself i have been around trucking all my life. My dad a couple years back drove a ch613 mack with a 400 and 18 speed mack motor/tranny. No one were he worked could shift the mack. My daddy told them a mack transmission is sensitive. Everybody else scrubs every gear. My boss also has a F model mack and H model mack, and a bunch of Kenworths and Freightliners.
