© 2000 Baker Hughes, a GE company – All rights reserved.
PV 411A Instruction Manual-English | 3
1. Introduction
The PV 411A hand-pump generates either pneumatic pressure and vacuum or hydraulic
pressure. The scissor-action handles provide pneumatic pressure and vacuum generation
and, in the hydraulic mode, provides hydraulic pressure generation for system priming.
1.1 Pneumatic Pump (Figure A1)
A selector valve (7) vents the system, to atmosphere, between selections of pressure and
vacuum. Operating the scissor-action handles (5) provides the pumping stroke, for pressure
generation.
A volume adjuster (3) allows small adjustments of the system pressure.
1.2 Hydraulic Pump (Figure A1)
The selector valve (7) vents the system, to the reservoir, between selections of pressure and
vacuum (used in the priming process). The volume adjuster (3) generates the required system
pressure. A fluid reservoir (see Figure A2), screwed into the inlet port (1), marked RESERVOIR,
on the top of the hand-pump completes the hydraulic circuit. A pressure relief valve (8) can
be adjusted to set a pressure between 30 and 700 bar (500 to 10,000 psi).
PTFE
polytetrafluoroethylene
SAE
Society of Automotive Engineers
UUT
Unit under test
Abbreviation
Description
