Priming Piston Service
Disconnect the Pump
WARNING
PRESSURIZED FLUID HAZARD
This equipment stays pressurized until pressure is
relieved manually. To help prevent serious injury
from moving parts, or from pressurized fluid, such
as splashing in the eyes or on skin, follow the
Pressure Relief Procedure in your system manual
when you stop pumping and before you clean,
check, or service the equipment.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when
in the work area to help prevent serious injury,
including eye injury, hearing loss, or inhalation of
toxic fumes.
This procedure involves thoroughly disassembling
and cleaning the individual parts in the pump lower
unit. Prior to performing this procedure, flush the
pump and relieve pressure as described in the
system manuals, disconnect all hoses, and remove
the pump from the system.
1. Perform
2. Loosen the coupling nut (6) and lower far enough
to remove the coupling collars (5).
3. Release the upper clamp (15) holding the
displacement pump to the tie rod plate (3).
4. Slide the pump down from the air motor. Remove
the gasket (16).
Note: Be careful not to scratch the displacement
rod.
Figure 1 Disconnect displacement pump.
Disassemble the Pump
NOTE: Pump Repair Kit 24G550 is available.
Purchase the kit separately. Kit parts are marked
with an * in the parts section. See
Displacement Pump Model 25N005, page 13
.
1. Remove the retaining pin (122) from the
connecting rod (104). Slide off the priming piston
(121).
2. Release the lower clamp (115) to remove the
inlet valve housing (102) from the pump cylinder
(101). Remove the gasket (116).
3. Remove the poppet (119), packings (120),
bearing (118), and valve stop (117) off the
connecting rod (104).
4
3A5798B
