Union Pacific No. 4004

UP No. 4004

Overview -

Propulsion:

Steam

Loco Type:

Tender Engine

Gauge:

4 ft 8 1⁄2 in (1,435 mm)

Status:

Preserved on static display

Location:

Holliday Park in Cheyenne, WY, US

History -

Designer:

Otto Jabelmann

A.H. Fetters

Livery:

UP Unlined Freight Black

Manufacturing Details:

Builder:

American Locomotive Company (ALCo.)

(b/n) Builder's No.

69575

Build Date:

August 1941

Service:

Former Operators:

Union Pacific Railroad

No.

4004

Years in Operation:

1941 - 1958

Wheel Arrangement:

Whyte Notation:

4-8-8-4+T

UIC-Classification:

(2′D)D2′ h4

Picture-Scheme:

ooOOOO OOOOoo

Configuration Name:

Big Boy

Axle No.

12

Boiler & Firebox:

Current Boiler Pressure:

300 lbf/in² (2.1 MPa)

Heating Surface:

5,889 sq. ft. (547 m²)

Tubes:

967 sq. ft. (90 m²)

Cylinders:

Cylinders (Dia. x Stroke):

24 in × 32 in (610 mm × 813 mm)

Operation:

Fuel Capacity:

6, 450 US Gallons

Water Capacity:

25,000 US Gallons (95,000 l; 21,000 Imperial Gallons)

Weight of Locomotive:

762,000 lb (345,637 kg)

Total Weight:

1,198,500 lb (543,630 kg)

Weight of Tender(s):

436,500 lb (197,993 kg)

Performance Statistics:

Horsepower:

7, 000

Maximum Speed:

80 mph (130 km/h)

Tractive Effort:

138,240 lbf (614.9 kN)

Dimensions:

Total Length:

132 ft. 9 7⁄8 in (40.48 m)

Valves & Motion:

Valve Gear:

Heusinger

Union Pacific Railroad No. 4004 is a four-cylinder articulated 4-8-8-4 "Big Boy" type steam locomotive built by the American Locomotive Company (ALCO) in 1941 for the Union Pacific Railroad.

The locomotive spent many years working on the Union Pacific railroad hauling freight trains until it made its last run in 1958 and was retired. It then donated to the Holliday Park in Cheyenne, Wyoming in 1963. While being on display throughout the years, 4004 is in bad condition and needed a cosmetic restoration. The restoration was completed in 2018 and the locomotive remained in good condition ever since.

Trivia[]

At one point in 1958 it was seen doubleheading a freight train with No. 4013.
4004 isn't the only Big Boy to have a cosmetic restoration. 4012 has one too three years later in 2021.
4004’s original Hancock 3 chime whistle was placed on Challenger 3985 in 1980, because 3985’s original whistle had been removed following retirement. It remained on the Locomotive for most of its excursion career until 2010 and retirement 2020. It remains on the locomotive stored in the Cheyenne roundhouse until 2022 when it was donated to the Railroading Heritage of Midwest America (RRHMA) to restore it back to operating condition. Meanwhile, a stock whistle was placed on 4004 during its 2018 cosmetic restoration.
The engine can be seen side by side with fellow surviving Big Boy #4023 in Herron Rail Video's Articulateds America's Biggest Steam DVD.

Gallery[]

List of Union Pacific Big Boy Locomotives

Real-Life Members:

4000 • 4001 • 4002 • 4003 • 4004 • 4005 • 4006 • 4007 • 4008 • 4009 • 4010 • 4011 • 4012 • 4013 • 4014 • 4015 • 4016 • 4017 • 4018 • 4019 • 4020 • 4021 • 4022 • 4023 • 4024

Fallen:

4000 • 4001 • 4002 • 4003 • 4007 • 4008 • 4009 • 4010 • 4011 • 4013 • 4013 • 4015 • 4016 • 4019 • 4020 • 4021 • 4022 • 4024

Preserved:

4004 • 4005 • 4006 • 4012 • 4014 • 4017 • 4018 • 4023

Preserved Union Pacific Locomotives
UP Class 700	No. 737
UP Class C-2	No. 237 • No. 264 • No. 561 • No. 616 • No. 618 • No. 6051 • No. 6237
UP Class C-57	No. 407 • No. 421 • No. 428 • No. 437 • No. 460 • No. 477 • No. 480 • No. 481 • No. 485
UP Class MK-1	No. 2005
UP Class MK-7	No. 2537
UP Class MK-9	No. 2295
UP Class MK-10	No. 2564
UP Class T-57	No. 1242 • No. 1243
UP Class P-1	No. 3206
UP Class P-2	No. 3203
UP Class TTT-6	No. 5511
UP Class S-4	No. 4420
UP Class S-5	No. 4436 • No. 4439 • No. 4442
UP Class S-6	No. 4455 • No. 4466
UP Class FEF-1	No. 814
UP Class FEF-2	No. 833
UP Class FEF-3	No. 838 • No. 844
UP Class 9000	No. 9000
UP Heavy Challengers	No. 3977 • No. 3985
UP Big Boys	No. 4004 • No. 4005 • No. 4006 • No. 4012 • No. 4014 • No. 4017 • No. 4018 • No. 4023