General Instructions:
Checkball Piston Pumps
High Pressure Hydraulics
D
YNEX
SERVICE
INSTRUCTIONS
SERVICE GUIDELINES
These instructions assume a basic understanding of standard
hydraulic system installation, operating practices and mainte-
nance procedures.
Avoid Contamination
Contamination is detrimental to any hydraulic system.
Absolute cleanliness is essential during servicing and installa-
tion to prevent foreign material from contaminating the pump
and hydraulic system.
Identify the Pump
The pump nameplate is located on the flat surface between
the inlet port and the mounting flange. See FIGURE 1.
This stamped metal tag includes either a ten-digit model
number (i.e., PF2006-1808) or a descriptive model code (i.e.,
PF1002H-SXEA-22-10). The serial number, also stamped on
the plate, can be helpful when communicating with the sales
department.
Confirm Pump Capability
Refer to the published pump specifications. Exceeding the
performance recommendations will reduce operating life.
Contact the sales department for a review of any application
which requires operating above rated pressures or flows, or
beyond the specified speed range.
Checkball hydraulic pumps are axial piston pumps, which use two
check valves in each piston pumping chamber to direct flow from
the inlet side of the pump to the pump outlet port. During operation,
a fixed-angle wobble plate rotates with the drive shaft. The angled
surface imparts a reciprocating motion to the pistons, which move in
and out of the bores in the stationary barrel.
Be Aware of Design Changes
Dynex reserves the right to change designs and specifications
at any time without incurring any obligation. Contact the sales
department if you have any questions about pump operating
parameters, proper installation or operation.
INSTALLATION INSTRUCTIONS
Inlet Pipe/Hose Sizing
1. Recommended maximum inlet fluid velocity is 4 feet per
second (1,2 metres per second).
2. Recommended maximum outlet fluid velocity is 30 feet
per second (9,1 metres per second).
Inlet Conditions
1. Failure to meet minimum inlet pressure requirements will
result in reduced output flow.
IMPORTANT: Refer to the "Minimum Inlet Pressure" table
on page 6.
2. Inlet pressures higher than 10 psi (0,7 bar) require a high-
pressure shaft seal. On most Dynex pump models a high-
pressure seal is an option that must be specified. Refer to
the published pump specifications.
FIGURE 1: Typical pump showing location of nameplate and shaft
rotation tag, adjacent to inlet port. Rotation is indicated only on
pumps which are unidirecional (do not have bi-directional shaft rota-
tion). Refer to "Pump Rotation" on page 2.
PV4018-2928
123456
