OM-05845
GHC SERIES
PAGE E-12
MAINTENANCE AND REPAIR
RELIEF VALVE DISASSEMBLY
(Figure E‐6)
NOTE
If the relief valve is low pressure, it will have one in
ternal spring (10AE). If the relief valve is high pres
sure, it will have two internal springs (10AE and
10AF).
Unscrew the cap (10AN) from the bonnet (10AK)
and remove the gasket (10AP). Back off the adjust
ment capscrew (10AM) to relieve pressure on the
spring(s) (10AE and/or 10AF).
Unscrew the bonnet from the valve body (10AA).
Remove the valve (10AD) and spring(s) (10AE and/
or 10AF). The spring guide (10AH) is an O‐ring fit in
the bonnet. Remove and discard the O‐rings.
If the warning plate (10AB) must be replaced, re
move the drive screws (BM), and remove the plate.
INCHES
DIMENSION “A”
(SEE TABLE E‐2)
10AA VALVE BODY
10AB WARNING PLATE
10AD POPPET
10AE SPRING
10AF SPRING (OPTIONAL)
10AH SPRING GUIDE
10AJ BONNET O‐RING OR
GASKET (OPTIONAL)
10AK BONNET
10AM CAPSCREW
10AN CAP
10AP CAP GSKT (OPTIONAL)
10AR TAG (OPTIONAL)
D
JAM NUT
10AG SPRING GUIDE O‐RING
BM
DRIVE SCREW
ASSEMBLED VIEW
PARTS KEY
Figure E‐6
.
Pressure Relief Valve Assembly
RELIEF VALVE REASSEMBLY
(Figure E‐6)
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.
