Class 100
The first Class 100 Crash Truck was produced at the Quartermaster
Depot,  Fort Holabird in Baltimore, MD.  It was built on a 1 1/2 ton, 4x4
chassis and was powered by a 73 HP Franklin Engine.  The truck was
equipped with a small capacity rotary gear pump and held 100 gals. of
water.  Cans of foam powder were carried atop the vehicle and a
mechanical foam maker was mounted on the right running board.  Foam
was produced by adding the powdered foam mixture into the foam
maker.  The truck carried a small number of tools for rescue work.  
Records indicate that only two of these small trucks were built.  W-503
and W-504.  Number 503 was assigned to the Carlisile Barracks in PA
while number 504 saw service at the Randolf Army Air Field, TX
1932 Holabird built Early Class 100 Crash Truck USA W-503
The second version of the Class 100 Crash Truck was also built in 1932 at the QMC Depot in
Baltimore.  Special provisions were made for producing effective foam and carbon dioxide gas for
fighting gasoline and oil fires involving aircraft.  It was built on a special 6x4 chassis and was
powered by a 130 hp. motor.  The 100 gpm. single stage centrifugal pump was mounted on the
chassis and operated through a power take-off from the motor.  The water tank held 300 gals.   
Foam was produced through special foam making aspirating nozzles, supplied from a 30 gal. foam
tank or a powder type foam maker.  Four fifty pound carbon dioxide cylinders were mounted in the
body of the vehicle and attached to a hose reel carrying 100 ft. of 1/2 in. high pressure hose
attached to a discharge nozzle.  Four types of portable fire extinguishers along with numberous hand
rescue tools were also carried.  There are no records on just how many of these rigs were built.  
Over 30 have been documented from pictures and Army Service Command records.
1939 Class 100 Holabird 6x4 Crash Truck
Class 110
Class 110 Holabird built Crash Truck
Class 125
The Class 125 Crash Truck was built on the Chevrolet, Dodge, Ford, International and Mack 4x2
Chassis.  Bodies were manufactured by Mack, Seagrave, General Pacific, John Bean and
General.  It was equipped with the Hardie Imperial Model LCXA midship mounted mulit-cylinder
piston pump having a capacity of 50-60 gpm. at 600 lbs. pump pressure.  Rigs produced by John
Bean were equipped the Bean Royal 55 pump. The water tank held 300 gals. and the foam tank
held 20 gals.  Three 100 ft. 3/4 in. high pressure lines were stored in the rear of the vehicle or on
reels atop the hose body.  The truck was equipped with hand tools for rescue work.  Unofficial
records and research indicated about 999 Class 125's were produced
Mack Trucks produced 100 Class 125 Crash Trucks on the Chevrolet  
chassis under War Department contract W-2337-eng-1099 from 12
March 1943 thru 31 Dec 1943 at the Long Island City Plant.
1942 International-Bean
1942 Ford-General
1942 Dodge-Bean
1942 Mack-Mack USA  502471
The Class 110 crash truck was built on the Chevrolet 4x4 chassis at the Motor Transport Shop,
Camp Holabird, Baltimore and the Memphis Quartermaster Depot, Memphis.  An additional 42
were constructed by the Oren Fire Apparatus Co.  The Army produced trucks can be identified by
a metal plaque stamped "Model 110 QMC" which covered the embossed   the sides of the hood.  
The Class 110 was equipped with a 100 gpm centrifugal power take-off pump and a 250 gallon
water tank.  Foam liquid was premixed in the water tank and the mixture was supplied to the fire
through 2, 100 foot 1 1/2 hose lines.  Four fifty pound Carbon Dioxide cylinders were mounted in
the body of the truck and attached to a hose reel at the rear of the vehicle.  The hose reel carried
100 feet of 1/2 inch high pressure line and attached to a CO2 discharge horn.  The 110 was
equipped with a portable fire extinguisher and numerous hand tools for rescue work.
Mack Trucks produced 200 of the Type 25 Class 125 Crash Trucks at its Long Island City plant
from 1 July 1942 thru 5 April 1943.
Built under War Department contract W-978-eng-6398 the trucks carried Mack chassis #s 25 S 1010
to 1209 and USA #s 502469-502668
HARDIE PUMPS ad from WWII
Type 25 Mack Class 125 USA 502471
Fire Trucks at War
US Army Class 335 Fire Truck
Mack Class 155 Prototype
Camp Travis
Class 1500 & Trailer