Keretapi Tanah Melayu class 22
Preserved locomotive 22102 in August 2023
Type and origin Power type Diesel-electric Builder English Electric-AEI Traction in association with Metro-Cammell Build date 1971 Total produced 40
Specifications Configuration: ​  • Commonwealth Co-Co Gauge 1,000 mm (3 ft 3+3⁄8 in) Bogies English Electric bolsterless low weight transfer Wheel diameter 3 ft 2 in (0.965 m) Wheelbase 11 ft 8 in (3.556 m) bogie Length 48 ft (14.630 m) over headstocks Width 9 ft 0+1⁄2 in (2.756 m) Height 12 ft 7 in (3.835 m) Axle load 14 long tons (14.2 t; 15.7 short tons) Loco weight 82+1⁄2 long tons (83.8 t; 92.4 short tons) Fuel type Diesel Fuel capacity 800 imp gal (3,600 L) Sandbox cap. 560 lb (250 kg) Prime mover English Electric 8CSVT Mk III RPM: ​  • RPM idle 450rpm  • Maximum RPM 900 rpm Engine type four stroke, four valves per cylinder Aspiration turbocharged, intercooled Generator EE822/16J Traction motors AEI-253 Cylinders 8 Vee Cylinder size 10 in × 12 in (254 mm × 305 mm) MU working not fitted Loco brake Air, proportional control, dynamic Train brakes Vacuum
Performance figures Maximum speed 60 miles per hour (97 km/h) Power output 1,710 hp (1,280 kW) gross, 1,500 hp (1,120 kW) net Tractive effort: ​  • Starting 58,300 lbf (259.3 kN)  • Continuous 40,300 lbf (179.3 kN) at 12 miles per hour (19 km/h)
Career Operators Keretapi Tanah Melayu Number in class 40 Numbers 22101 - 22140 First run 1971

The KTM Class 22 is a class of mainline diesel electric locomotives designed and equipped by English Electric-AEI Traction, with construction by Metro-Cammell, for operations by Keretapi Tanah Melayu in Malaysia.

Description

The class 22 is a dual cab general purpose locomotive with a full width body. The body is a single stress-carrying truss structure designed for a buffing load of 300,000 lbf (1,334.5 kN). It consists of a basic underframe of rolled channel longitudinal side members connected by cross members at bogie, power unit and equipment mounting points, as well as at buffer beams and drag boxes. Sides consist of fabricated frames with steel panelling welded to the underframe. The prefabricated cabs are also welded to the underframe and sides to form the box structure. Detachable roof panels with hinged covers provide access to components for maintenance and overhaul.

The bogies were designed by English Electric. They are cast steel bolsterless with fully equalised primary suspension using helical coil springs on underslung beams and three-point secondary rubber cushion suspension to the body. To equalise motor reactions, the AEI-253 motors are all mounted on the inner side of each axle.

The engine is the 1,760 bhp V-8 version of English Electric's RK/V Mk III range, turbocharged and intercooled. It provides a 17% increase in power over the 12SVT Mk II engine fitted to the earlier Class 20.^[1] The EE822 DC generator is bolted directly to the engine.^[2][3] In February 1995, four (22105, 22107, 22119, 22140) were sent to Morrison-Knudsen's factory in Whyalla, Australia for rebuilding.^[4] In April 2001, 22119 arrived at A Goninan & Co, Broadmeadow for rebuilding.^[5] It was scrapped in 2004.^[6]

After being withdrawn in 2010, four were retained and plinthed as exhibits, while three were sold for use by civil engineering contractors, one going to Bangladesh for use by civil engineering firm Maxx Railway Track after being refurbished by Nippon Kiara in Kuala Lumpur in 2014.^[1]