REED EHTP500 Manual Del Operador página 5

SEAL KIT INSTALLATION
Seal Kit #48181 is used to replace the piston seals and check
valve seals and springs. (See "Parts Diagram of Pump".) If the
pump does not build pressure, there may be debris lodged in the
check valves. There are two check valves under each end cap.
Remove the end caps using a 5mm hex wrench and inspect the
check valves. If the issue is not solved, the pump seals may have
to be replaced using Seal Kit #48181.
In order to remove the piston, the pump must first be removed
from the motor (EHTP models) or bearing housing (DPHTP).
Remove the name plate on the front of the pump. Some of the
grease inside the housing will have to be removed to access
the four Philips head screws at the back of the housing. These
are aluminum screws and caution must be taken not to strip the
heads. One or two of the screws will be behind the main bearing.
The bearing must be rotated around by wedging a flat head screw
driver between the housing and bearing, forcing the bearing out
of the way in order to access the screws behind it.
POWER HYDROSTATIC TEST PUMP OPERATING INSTRUCTIONS
Once the housing has been removed, proceed by removing
the two end caps using a 5mm hex wrench. The piston can be
removed by pushing it out the end. Remove the brass washer
and three seals from both ends of the housing. Be sure to
observe the orientation of the seals. Remove the two internal
O-rings on the inside of the piston bushings and replace them.
Replace the three seals and brass washer on both ends and
insert the piston. Remove and replace the two large O-rings on
the top of the piston bushings. There are two remaining large
O-rings that are not used and can be discarded.
Replace the check valve seals and springs. Remove the check
valves. Push the metal cup out of the rubber seal and replace the
spring. Push the assembly into the new seal and return the valves
to the housing.
Reassemble the end caps and mount the pump to the motor.
Be sure to refill the pump housing with a water resistant, all-pur-
pose lithium grease.
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