OM--05450
GHS 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)
10AG O-RING
10AH SPRING GUIDE
10AJ O-RING OR GSKT
10C BONNET O-RING
10AK BONNET
10AM CAPSCREW
10AN CAP
10AP CAP GSKT (OPTIONAL)
10AR TAG (OPTIONAL)
D
JAM NUT
BM DRIVE SCREW
PARTS KEY
ASSEMBLED VIEW
Figure E-7
.
Pressure Relief Valve Assembly
RELIEF VALVE REASSEMBLY
(Figure E-7)
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 or gasket (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”, Figure E---7) is
reached. Refer to the separate Parts List accompa-
nying your pump and determine the hydraulic size
(D,G,J,N, etc.) and spring option code (STD, 25D,
etc.) for your pump. See Table E---2 or E---3 and ad-
just the capscrew (10AM) to the proper “A” dimen-
sion for the 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.