Section 12 Hydraulic Motors and Hydraulic Pumps

1201. Application

1. Where the manufacturer obtained the Approval of Quality Assurance System specified in Ch 5 of the Guidance apply to the Type Approval of individual units of hydraulic pumps and hydraulic mo- tors intended to be used for steering gear, windlass, cargo winch and other deck machinery, open- ing/closing appliance of watertight door, side thruster and other auxiliaries for essential use, manu- factured at the same manufacturing plant by mass production methods, in principle, the Society ap- ply to the requirements of this Section for the tests and inspection of them.

2. Hydraulic motors and hydraulic pumps in this Section mean those in the types of gear, screw, vane and piston.

1202. Type tests

1. The type tests are to be carried out on the hydraulic motors and hydraulic pumps random selected one for each type from the production line.

2. The items of the type tests are to be, in principle, as follows:

(1) Construction instruction

(2) Pressure test

(3) Operational performance test

(A) Performance test

(B) Continuous running test

(C) Vibration test

(D) Temperature rise test

(E) Relief valve test

(4) Overhaul inspection of major components after operational performance tests

(A) Gear type and screw type

Casing, cover, gear, screw, shaft, bearing and relief valve

(B) Vane type

Casing, cover, vane, rotor, bush, cam ring, driving shaft and relief valve

(C) Axial piston type

Driving shaft, bearing piston, rod, cylinder block, valve plate, cam plate, pump casing, bear- ing casing, cover, flexible shaft coupling, controller and servo system

(D) Radial piston type

Driving shaft, crankshaft, bearing, piston, rod, side guide, cam curve, pump casting, slide block, cylinder casting, cover, relief valve and servo system

(5) Other test required by the Society

3. Representative type of hydraulic pumps and hydraulic motors intended to be used for steering gear is to be performed continuous running test for 100 hours. Testing methods are to comply with the requirements specified in Pt 5, Ch 7, 501. 3 of the Rules.

1203. Tests of individual Hydraulic Motors and Hydraulic Pumps after approval Construction instruction, pressure test and performance test of safety devices during operation are to

be carried out. In case where noise and/or vibration which is required to be ascertained is occurred, overhaul inspection may be requested by the Society.

Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 95