Between 1931 and 1940 ALCO built 177 high hood (HH) switching locomotives of various horsepower ratings and body styles. The “HH” models were forerunners to the popular S-series of switchers which featured lower hoods. ALCO’s high hood switchers were in production long before similar models from competitors EMC/EMD (1935) and Baldwin (1937). Interestingly, the “HH” model designation is a term coined by rail historians to describe what ALCO documentation had simply referred to as 600-hp or 660-hp switchers. In later years ALCO had referred to these early units as “high hood switchers” so this designation is appropriate.

Of the 177 high hood switchers built, 104 were HH600s, 18 were HH660s, 21 were HH900s and 34 were HH1000s. Some of the largest users of these models included New Haven, Lackawanna and New York Central. Various physical changes occurred during the 19 years these locomotives were in production. The biggest change occurred in 1934 when ALCO hired industrial designer Otto Kuhler to improve the appearance of their very boxy, utilitarian switchers. The post-1937 production units we are now offering featured many of his suggested improvements.

In 1938 ALCO introduced a line of high hood switchers powered by the new model 538 diesel engine which featured a cast iron engine block. This engine was offered in both a 660-hp (non-turbocharged 538) and 1000-hp (turbocharged 538-T) switcher, each weighing approximately 196,000 pounds. The horsepower rating could be adjusted downward slightly per customer specification by lowering the RPM of the diesel engine. Therefore, 600-hp and 900-hp models were offered concurrently. The HH600 and HH660 locomotive models we are offering were produced from 1938 to 1940 and were externally identical.

Features:

• All new tooling
• Early Blunt truck with separate brake cylinders, molded coil spring detail (optional) and metal truck chains
• Separately-applied metal grab irons and lift rings  
• Separately-applied fine scale handrails and stanchions, coupler cut lever and piping  
• Directional lighting with golden-white LEDs  
• Five-pole skewed armature motor with dual flywheels for optimum performance at all speeds

Atlas Master™ Series Silver Additional Features:

• NMRA 8-pin plug for DCC (Decoder-ready)

Atlas Master™ Series Gold Additional Features:

• Electronic Dual-Mode® Decoder (e-DMD) that allows your locomotive to run in DCC or traditional DC

QSI® Quantum System™ Features Including:
(Atlas Master® Series Gold locomotives only)

• NEW! Quantum Revolution Technology
• Compatible with the NMRA DCC Standards and RPs
• Supports 2 and 4 Digit Addressing
• Programmable acceleration, deceleration & starting voltage
• Complete sound file downloading supports cut & paste or editing of sound records
• High quality 16 bit digital sound with 8 Sound Channels
• Individual, adjustable volume controls
• Authentic diesel engine sounds; other sounds include air horn/bell, Doppler effect, brake squeal, coupling/uncoupling/air hose parting, and more!
• Stat Chat, Verbal Audible response to programming commands
• Sound of Power by Load Conditions
• Improved Notching and Transitions

Note: Due to the higher starting voltage required to operate the sound system, it is not possible to MU a non-sound-equipped loco in DC (analog) mode

AccuMate® couplers are made under license from AccuRail, Inc.

150-10000428
Master(TM) Series Silver Diesel Alco HH660 - Standard DC
Maine Central #951 (black, red)

Retail $154.95

Discount Price $112.95

150-10000429
Master(TM) Series Silver Diesel Alco HH660 - Standard DC
Maine Central #952 (black, red)

Retail $154.95

Discount Price $112.95

150-10000791
Master(TM) Silver Series Diesel HH600/660 - Standard DC
Wabash #100 (black, white)

Retail $149.95

Discount Price $112.95

150-10000798
Master(TM) Gold Series Diesel HH600/660 - Sound & DCC Equipped
Boston & Maine #1161 (black, red, white)

Retail $259.95

Discount Price $194.95

150-10000803
Master(TM) Gold Series Diesel HH600/660 - Sound & DCC Equipped
Central of New Jersey #1023 (green, yellow)

Retail $259.95

Discount Price $194.95

150-10001090
Master(TM) Series Silver Diesel HH600/660 - Standard DC
Elgin, Joliet & Eastern #211 (green, orange)

Retail $154.95

Discount Price $116.95

150-10001092
Master(TM) Series Silver Diesel HH600/660 - Standard DC
Green Bay & Western #101 (red, gray)

Retail $154.95

Discount Price $116.95

150-10001093
Master(TM) Series Silver Diesel Alco HH660 - Standard DC
Delaware, Lackawanna & Western #409 (black)

Retail $154.95

Discount Price $116.95

150-10001096
Master(TM) Series Silver Diesel Alco HH660 - Standard DC
Northern Pacific #602 (black, yellow)

Retail $154.95

Discount Price $116.95

150-10001097
Master(TM) Series Silver Diesel Alco HH660 - Standard DC
Walla Walla Valley #770 (black, yellow)

Retail $154.95

Discount Price $116.95

150-10001099
Master(TM) Series Gold Diesel Alco HH660 - Sound & DCC Equipped
Maine Central #951 (black, red)

Retail $264.95

Discount Price $198.95

150-10001100
Master(TM) Series Gold Diesel Alco HH660 - Sound & DCC Equipped
Maine Central #952 (black, red)

Retail $264.95

Discount Price $198.95

150-10001101
Master(TM) Series Gold Diesel Alco HH660 - Sound & DCC Equipped
Elgin, Joliet & Eastern #211 (green, orange)

Retail $264.95

Discount Price $198.95

150-10001105
Master(TM) Series Gold Diesel Alco HH660 - Sound & DCC Equipped
Delaware, Lackawanna & Western #410 (black)

Retail $264.95

Discount Price $198.95

150-10001108
Master(TM) Series Gold Diesel Alco HH660 - Sound & DCC Equipped
Walla Walla Valley #770 (black, yellow)

Retail $264.95

Discount Price $198.95