As per API 610, 11th Edition, Clause 6.10.2.4b - For ring oil or splash system, oil sunp temperature below 82 Deg C (180 Deg F). During shop testing, the pump oil temperature shall not exceed 40K (70 Deg R) and (if bearing temperature sensors are supplied) outer ring temperature shall not exceed 93 Deg C (200 Deg F).
The gear box is provided with cooling coils, water taken from fire water pump discharge. The shop test site ambient temperature is 20 DegC. The actual site maximum temperature is 50 Deg C.
The temperature rise observed during tests is 62 and 42 Deg C. These are above permitted temperature rise of API 610. At site, actual temperature can go as high as 112 Deg C.
The gear box is using spherical roller thrust bearings which requires a minimum downthrust to operate. If pump impeller bottom touches casing, downthrust will be taken by casing and spherical roller bearing will operate without downthrust and can cause hearing heating and failure.
The engine speed is 1825 rpm, for gear box maximum input speed is 3520 rpm. Hence speed is OK. Maximum absorbed power is 615 kW. Engine power rating is 738 kW at 1825 rpm, Gear box rating is 695kW at same speed. Hence power rating is OK.