OM-04386
GMS SERIES
PAGE E-12
MAINTENANCE AND REPAIR
INCHES
DIMENSION “A”
(SEE TABLE E‐2)
10AA VALVE BODY
10AB WARNING PLATE
10AD POPPET
10AE SPRING
10AF SPRING (OPTIONAL)
10AH SPRING GUIDE
10AJ O‐RING OR GASKET (OPTIONAL)
10AK BONNET
10AM CAPSCREW
10AN CAP
10AP CAP GSKT (OPTIONAL)
10AR TAG (OPTIONAL)
D
JAM NUT
10AG O‐RING
BM
DRIVE SCREW
PARTS KEY
ASSEMBLED VIEW
P
Figure E‐5
.
Pressure Relief Valve Assembly
RELIEF VALVE REASSEMBLY
(Figure E‐5)
Do not return the pump to service with
out the warning plate (10AB) installed.
Failure to observe the warning on the
plate could result in destruction of the
pump, and injury or death to personnel.
Inspect the components for wear, grooves, or
other damage that might cause leakage. If any
components are worn, replace the defective parts.
If removed, attach the warning plate (10AB) to the
valve body (10AA) using the drive screws (BM).
If used, lightly oil the O‐ring (10AJ) and install it in
the groove on the bonnet (10AK).
Lightly oil the O‐ring (10AG) and install it in the
groove on the spring guide (10AH). Start the large
end of the spring guide into the bonnet (10AK), and
push the guide in until it bottoms out.
Insert the valve (10AD), finned end first, into the
valve body (10AA). Install the spring(s) (10AE and/
or 10AF). Make certain that the spring (10AE) fits
over
the spring guide (10AH), and the optional
spring (10AF) fits
into
the guide, and thread the
bonnet into the valve body.
Install the jam nut (D) on the adjustment capscrew
(10AM), and thread the capscrew into the bonnet
until the desired height “A” is reached. See Table
E-3 and adjust the capscrew (10AM) to the proper
“A” dimension for desired cracking pressure.
Never operate the pump without the ad
justing screw jam nut in place. Other
wise, the relief valve spring(s) can be
compressed too far for the valve to
open. If the valve does not open, exces
sive pressure can develop, causing
damage to the pump and possible injury
to personnel.
Refer to the separate Parts List accompanying
your pump, and determine the specific hydraulic
size (D, G, J, etc.).