Our Engine

We have a Cummins 5.9 reconditioned diesel engine and Allison automatic transmission out of a 1993 Ford B-700, 65 passenger school bus, engine has 25,494 miles on it since replaced. This engine has the P7100 injection pump meaning that it was build between 1994 – 1998. It also has an intercooler. We are not positive about this engine because the serial number plate is missing. The engine and transmission we are keeping. The body of the bus is now a storage shed for aluminum various junk and the rest of the bus is off to the scrap yard. We paid $3,500 along with the same condition that the bus had to make the 100 mile trip to Tulsa. The bus body makes a handy storage shed, the C-channel frames will make a good gangplank and we got $500 back for scrapping the seats and axels.

The serial number plate is gone so we’re going to call it a 1996 Dodge Ram 2500 5.9L Turbo changed Diesel  / Cummins 6BT serial number# 56214135

The engine is a Recon Cummings or reconditioned, but the serial number plates are missing. The number etched in the front drivers side of the head is 1270257 with 06 94 below it.
Here’s a manual for reference: 5.9 Cummins Manual

5.9L 12v Specifications

Firing Order:
Compression Ratio:
Oil Capacity:
Governed Speed:
Years of Operation:

359 cubic inches, 5.9 liters
Inline 6 cylinder
4.02 inches
4.72 inches
Direct Injection*
Holset turbocharger
OHV, 2 valves per cylinder, solid lifter camshaft
11 quarts
approx. 975 lbs, 905 lbs dry.
160 – 215 HP @ 2,500 RPM
400 – 440 lb-ft @ 1,600 RPM
2,700 RPM
1989 – 1998

*Motor is either a Bosch VE injection pump (1989-1993) or a
Bosch P7100 injection pump (1994-1998).

Power Steering Pump:   Zahnradfabrik Friedrichshafen Type 76749?4150

Allison AT545 Transmission

Serial # 3210627425 Part # 29507181 Model: AT545 93BOT

Used price is $700 to $800. Rebuilt is about $1600 + the core.

Oil type Dexron® III, C4, capacity (excluding external circuit) 20.0 qts (18.9 liters) standard oil pan.

Specifications Allison_AT_454.pdf

Read more: http://wiki.answers.com/Q/Allison_Transmission_model_AT545_specs#ixzz1JVvqvu3V

On a AT545 transmission, there are two wires on the drivers side close to the shift lever for the starter neutral circuit. One wire goes to the starter switch and the other goes to the starter solenoid. On the passenger side there is a pressure switch that has two wires or pins for the back-up light. One wire gets 12v, and the other goes to the reverse lights.

RPM Reduction Ratio in 1st gear is 3.45:1

Engine 2,500 RPM = 725 Shaft RPM
Engine 1,600 RPM = 464 Shaft RPM

Fuel System

There are 4 primary integrated fuel tanks built into the cargo holds floor. Each of these hold about 300 gallons. The fills for these tanks are routed through the aft cargo hold bulkhead and into the engine room. The fuel system manifold, pumps, filters, are mounted on the engine room side of the bulkhead

Always put your vacuum gauge after your “off engine” fuel filters, but before any pumps.
Filtration increases; smaller micron, as you approach the engine. 30, then 10, then 2 micron.

Roughneck 12V Fuel Transfer Pump