OM-05450
GHS SERIES
PAGE E-10
MAINTENANCE AND REPAIR
ceed as follows with rotor adjusting sleeve installa
tion.
Use caution
not to damage seal parts when
installing the rotor adjusting sleeve.
Loosen the socket head setscrews (GA). Slide the
rotor adjusting sleeve kit over the shaft. Use cau
tion not to damage installed seal components on
the shaft. Screw the rotor adjusting sleeve into the
backhead until the rotor bottoms against the head.
It is recommended that a new bearing lock
washer (03B) be installed any time the ro
tor adjusting sleeve is disassembled. Re‐
use of an old lockwasher may create a pre‐
load condition on the bearing, resulting in
premature bearing failure.
Install the bearing lockwasher (03B) and screw the
bearing locknut (03C) onto the shaft until tight.
Align one of the slots in the locknut with one of the
tabs on the lockwasher, and bend the tab on the
lockwasher into the slot on the locknut.
Proceed with
Setting End Clearance
.
SETTING END CLEARANCE
The end clearance between the head (01AA) and
the face of the rotor (03A) is pre‐set from the factory
based on the liquid temperature, viscosity and oth
er characteristics provided at the time of the order.
This clearance is critical to achieve the optimum
performance and maximum service life from your
pump. The end clearance should be checked and
adjusted, as required, as part of a regular preven
tive maintenance schedule, whenever perform
ance drops or when the pump is disassembled.
The proper end clearance for your pump can be
determined by two methods. Table E‐1 shows cor
rect end clearance based on hydraulic size, viscos
ity and temperature. Table E‐2 shows correct end
clearance based on the rotor trim code indicated
on the pump Parts List. Determine the end clear
ance for your pump from either of these tables.
DC, DE
.004
.006
.008
.004 .004
.006
.010
GC,GF,GH,GJ
.004
.006
.008
.006 .008
.008
.010
JG,JJ,JL,JP
.004 .006
.008
.010
.006 .008
.010
.012
NK,NM,NP
.006 .006
.008
.010
.006 .008
.010
.012
RM,RP,RR,RS
006 .008
.010
.012
.008 .008
.010
.014
Dimensions are shown in inches. For Viscosities Above
250,000 SSU, or Other Special Applications, Consult Your
Local Gorman‐Rupp Distributor or the Factory.
750 2500 25,000 250,000 750 2500 25,000 250,000
225 225 225
225
400 400
400 400
Max. Visc. (SSU)
Max. Temp. (
_
F)
HYD. SIZE
Notes:
DC, DE
.006 .006
.008
.010
GC,GF,GH,GJ
.006 .006
.008
.010
.008 .008
.010
.012
JG,JJ,JL,JP
.006 .008
.010
.012
.008 .010
.012
.014
NK,NM,NP
.008 .008
.010
.012
.010 .010
.012
.014
RM,RP,RR,RS
.008 .010
.012
.014
.010 .010
.012
.016
750 2500 25,000 250,000 750 2500 25,000 250,000
525 525 525
525
675 675
675 675
Max. Temp. (
_
F)
Max. Visc. (SSU)
HYD. SIZE
Table E‐1. End Clearance Based on Hydraulic
Size, Viscosity and Temperature
Rotor
Trim
Code
V
i
s
c
o
s
i
t
y
T
r
i
m
s
Pump Hydraulic Code
Std
.004
.004
.006
.006
.008
D
G
J
N
R
35C
.006
.008
.008
.010
35D
.010
.010
.012
.012
.015
T
e
m
p
T
r
i
m
s
35J
.006
.006
.006
.008
.008
35L
.008
.008
.010
.010
.012
35M
.010
.010
.012
.012
.014
Notes:
For Rotor Trim Codes Not Listed or for Special Applications,
Consult Your Local Gorman‐Rupp Distributor or the Factory.
Consult Pump Parts List For Rotor Trim Code.
Table E‐2. End Clearance Based on Rotor
Trim Code
