Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,371 pages of information and 233,518 images on early companies, their products and the people who designed and built them.
Hydraulic Engineering Co of Charles Street, Chester were engine builders.
1874 Incorporated as a limited company.
1876 Supplied a range of equipment on Tweddell's sytem to the French Government dockyards at Toulon, including large hydraulic pumping and shearing machines and two 50 HP pumping engines. The contract was handled by Henry Chapman of Paris
1883 Two 40-ton hydraulic cranes to work in the forge at Portsmouth Dockyard. 
1891 For description of works see 1891 The Practical Engineer
1894 Chester Hydraulic Co supplied 4 triple expansion engines for the central hydraulic station at Manchester.
1903 Two Horizontal Engines with gear drive for the Great Western Railway (Kemble Station)
1905 Plaque at the Museum of the Great Western Railway 'No. 101'.
1914 Engineers, ironfounders and manufacturers of hydraulic power plants, cranes and lifts. Employees 400. 
1920 Mangnall's Earth Thrust-borer. 
Pre-1927 Hydraulic Pumping Engine. Exhibit at Manchester's Museum of Science and Industry