Yamaha Majesty 400 Service Manual

Recently picked up a Majesty 400 and some resources are easier to find than others. This is a pretty interesting scooter so far and I’ll write more about it soon. Meanwhile, I’ve found a copy of the factory service manual which I’m sharing here for...

Allison MT600 series (MT643) Service Manual

Allison’s MT643 transmission is a good choice for a skoolie. It’s still a 4 speed with the same ratios as the AT545, but with a much higher power capability and a lock-up function in 3rd and 4th gears. Combined with a rear axle ratio of 4.44:1 or lower, a...

International/Navistar T444E Service Manual

The T444E is one of the most popular engines found in school buses between 1994 and 2004. This engine was used as the base platform for Ford’s 7.3 Powerstroke as well, sharing almost all mechanical components. The T444E replaced the 7.3 IDI that was produced...

Cummins B Series Operation and Maintenance Manual

The 12 valve, mechanical Cummins 5.9 engine is very popular in school buses between the late 1980s and the late 1990s. Originally introduced in 1984 for agricultural uses, it earned a solid reputation for reliability and longevity. This engine was also very popular in...

Allison AT545 Transmission Service Manual

The AT545 is the most popular transmission in school buses in the 1980s and 1990s and is generally a very reliable unit if you accept its limitations. Nearly every bus equipped with the Cummins 5.9 or Navistar T444E in a front engine configuration will be using the...