GORMAN-RUPP HO Series User manual

PL−02836−HO02
July 18, 1991
VXY
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
www.grpumps.com
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
eCopyright by the Gorman-Rupp Company
PARTS LIST
AND MAINTENANCE MANUAL
HO SERIES PUMP
MODEL
HO3/4A4A−H
TABLE OF CONTENTS
PUMP MAINTENANCE AND REPAIR PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS LIST:
Pump Model HO3/4A4A−H PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E − 2. . . . . . . . . . . . . . . . . . . . . . . . .

Register your new
Gorman-Rupp pump online at
www.grpumps.com
Valid serial number and e-mail address required.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your pump model and serial number in the
spaces provided below. Your Gorman-Rupp distributor
needs this information when you require parts or service.
Pump Model:
Serial Number:

ITEM
NO.
PART NAME PART
NUMBER
MAT’L
CODE
QTY ITEM
NO.
PART NAME PART
NUMBER
MAT’L
CODE
QTY
HO SERIES PL−02836−02
MAINTENANCE & REPAIR PAGE E − 1
PARTSPAGE
PUMP MAINTENANCE AND REPAIR - SECTION E
SECTION DRAWING
Figure 1. Pump Model HO3/4A4A−H
PARTS LIST
(From S/N 983555 up)
If your pump serial number is followed by an N", your pump is NOT a standard production model. Contact
the Gorman-Rupp Company to verify part numbers.
1 PUMP HOUSING 38233−076 10010 1
2 NAMEPLATE DECAL 38812−065 −−−−−1
3 DISCHARGE DECK ASSY 46442−507 −−−−−1
4 HEX HD CAPSCREW B0403 15991 1
5 PIPE PLUG P02 14990 1
6 HEX HD CAPSCREW B0403 15991 8
7 LEVER 38582−020 10000 1
8 WING AND SHAFT ASSY 38552−501 14000 1
9OIL SEAL 25258−071 −−−−−1
10 LID 38242−706 10000 1
11 HOUSING GASKET SET 48211−055 −−−−−1
12 ROLL PIN 21154−786 −−−−−2
13 SUCTION DECK ASSY 46442−007 −−−−−1
INDICATES PARTS RECOMMENDED FOR STOCK
Above Serial Numbers Do Not Apply To Pumps Made In Canada.
CANADIAN SERIAL NO. .............................. AND UP

HO SERIESPL−02836−02
MAINTENANCE & REPAIRPAGE E − 2
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all warnings in the INSTALLATION AND
OPERATION manual.
Follow the instructions on all tags, label and de-
cals attached to the pump.
This pump requires little service due to its rugged,
minimum-maintenance design. However, if it be-
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional view (see Figure 1) and the accompa-
nying parts list.
Pump Disassembly
Before attempting to service the pump, close all
valves in the system and remove the suction and
discharge piping. Remove the hardware securing
the pump to its mounting surface, and move the
pump to a clean, well-equipped shop for service.
Loosen the capscrew (4) and remove the lever (7).
Remove the capscrews (6), and pull the lid (10),
wing and shaft assembly (8), and oil seal (9) out of
the housing as a single unit. Remove the housing
gasket set (11) and clean the mating surfaces.
NOTE
Note the location of the words IN" and OUT" on
the lid compared to the suction and discharge
ports. This is very important for reassembly. The fill
plug (5) should be located in the 3 o’clock position.
Slide the wing and shaft assembly out of the lid.
Use a screwdriver or other suitable tool to pry the
oil seal out of the lid.
Lift the suction deck assembly (13) and discharge
deck assembly (3) out of the housing (1). Inspect
the two locating pins (12) for damage. If replace-
ment is required, pull them from the housing.
Pump Reassembly
Clean all component parts with a cloth soaked in
fresh cleaning solvent. Use an approved solvent
when cleaning parts; never use gasoline.
ÍÍÍÍÍÍ
ÍÍÍÍÍÍ
ÍÍÍÍÍÍ
WARNING
MOST CLEANING SOLVENTS ARE TOXIC AND
FLAMMABLE. USE THEM ONLY IN A WELL−
VENTILATED AREA FREE FROM EXCESSIVE
HEAT, SPARKS, AND FLAME. READ AND FOL-
LOW ALL PRECAUTIONS PRINTED ON SOL-
VENT CONTAINERS.
Inspect the parts for wear or damage and replace
as required. If the shaft or wing are damaged, the
complete assembly must be replaced. Individual
parts are not sold separately. The same is true of
the suction and discharge deck assemblies; valves
are not sold separately.
If removed, press new locating pins (12) into the
housing.
Install the suction deck assembly (13) in the hous-
ing so that the valves are directed toward the cen-
ter of the pump.
Install the discharge deck assembly (3) in the
housing so that the valves are directed away from
the center of the pump.
Lightly lubricate the oil seal (9), and use an arbor
(or hydraulic) press and a suitable sized dowel to
install it in the lid (10) with the lip positioned as
shown in Figure 1.
Carefully slide the wing and shaft assembly (8) into
the lid. Be careful not to roll the lip of the oil seal.
Position the housing gasket set (11) against the lid,
and slide the assembled lid, seal, and wing and
shaft assembly into the housing.
NOTE
The raised bosses on the wing should be directed
toward the suction deck assembly to provide prop-
er mounting.
Secure the lid to the housing with the capscrews
(6). Be sure the words IN" and OUT" cast into the
lid are directed toward the correct ports. The fill
plug should be located in the 3 o’clock position.
Secure the lever (7) to the shaft with the capscrew
(4).
Check the shaft endplay. If endplay is excessive,
remove the lid and discard one of the housing gas-
kets.

For U.S. and International Warranty Information,
Please Visit www.grpumps.com/warranty
or call:
U.S.: 419−755−1280
International: +1−419−755−1352
For Canadian Warranty Information,
Please Visit www.grcanada.com/warranty
or call:
519−631−2870
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA