Hydraulic Requirements; Rotation Control Valve Manifold; Case Drain; Rotator Maintenance Continued - Stanley MSD 1000 Safety, Operation & Maintenance Manual

MSD SABER SERIES SHEARS

HYDRAULIC REQUIREMENTS

The rotating shear requires an auxiliary hydraulic circuit in order to operate the rotator. This circuit will need
to be a medium pressure (2000 - 2500 PSI/138 - 172 BAR), low fl ow (8 - 10 GPM/30 - 39 LPM) hydraulic circuit.
There are minimum and maximum pressure and fl ow requirements that may vary depending upon the shear
model. These requirements are listed in the Hydraulic Installation Requirements sheet in the Parts Catalog for
the shear. The rotation control manifold my vary depending upon the type of the rotation system and the par-
ticular requirements for the rotation circuit. Adjustment procedures for the rotation control valve are given on
the following pages.

ROTATION CONTROL VALVE MANIFOLD

One of two rotation control valves is installed on the shear depending upon the model. The rotation control
valve manifold provides overload protection and a load control system for the rotator with two crossover relief
valves and two brake valves. The crossover relief valve and brake valves have been preset at the factory and
require no adjustment. Do not tamper with these valves. If a malfunction is suspected due to a lack of perfor-
mance in the rotator, a pressure check should be performed. Diagnostic fi ttings (which require a Parker PD
Series coupler or gauge) are installed in the manifold to provide a means of checking pressure. Contact the
Stanley LaBounty Service Department for the proper procedure for performing this check.

CASE DRAIN

A case drain is required because back pressure can develop in the hydraulic motor case as a result of metering
fl ow out of the motor. Depending upon the shear model, this port will either be a bulkhead in the upper head
side plate or will be located in the hydraulic port block. A 1/2" hydraulic line should be connected to this port and
routed back directly to the tank via a return-line fi lter or a fi lter of its own. The maximum allowable back pres-
sure in this line should not exceed 300 PSI.
NOTICE
The case drain line must be connected to prevent
failure to the case or motor seals.
Rotator Maintenance Section 6 Page 7