Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 29)

OM−03745 0 SERIES
MAINTENANCE & REPAIR PAGE E − 9
NOTE
It is not recommended that substitute locking mate-
rials be used in this application. Use only the rec-
ommended ‘Loctite’ products.
Align the impeller and key with the shaft keyway,
and press the impeller onto the shaft until fully
seated. Be sure the seal spring seats squarely
over the shoulder on the back of the impeller.
After the impeller is installed, immobilize the drive
shaft (25), and install the impeller nut (44). Torque
the impeller nut to 120 ft. lbs. (1440 in. lbs. or 16.6
m. kg.).
NOTE
After the impeller has been installed, check for free
rotation. Correct any scraping or binding before fur-
ther reassembly.
Suction Head and Wear Ring Installation
If the wear ring (43) was removed for replacement,
press the replacement ring into the suction head
(48) until it seats squarely against the shoulder
bore.
The wear ring must seat squarely in the
suction head bore or binding and/or ex-
cessive wear will result.
Install the suction head gasket (51) over the studs
(49). Slide the suction head over the studs, and se-
cure with the nuts (50).
Installing Pump and Gearbox
Secure the pump and gearbox to the vehicle chas-
sis with the previously removed hardware. Be sure
to install any leveling shims used under the casing
mounting feet.
Reconnect the P.T.O. shaft the the gearbox drive
shaft, and check the alignment as described in IN-
STALLATION, Section B.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Be sure the pump and gearbox have been prop-
erly lubricated (see LUBRICATION).
Refer to OPERATION, Section C, before putting
the pump back into service.
GEARBOX DISASSEMBLY
When the pump is properly operated and main-
tained, the gearbox should not require disassem-
bly. Disassemble the gearbox only when there is
evidence of wear or damage.
Gearbox disassembly in the field is not rec-
ommended. These operations should be
performed only in a properly-equipped
shop by qualified personnel.
If the gearbox requires disassembly, first disas-
semble the pump components as indicated in
PUMP AND SEAL DISASSEMBLY.
Before attempting to disassemble the gearbox, re-
move the magnetic drain plug (52) and drain the lu-
bricant. Clean and reinstall the drain plug.
With the pump end components removed, remove
the pipe plug (29) and use a drift pin to tap the pin-
ion shaft (46) and bearings (31 and 32) from the
gearbox housing (33).
Remove the shaft key (24). Remove the nuts (21)
and slide the bearing cap (23) and assembled oil
seal (26) off the shaft. Remove the bearing cap
gasket (19) and bearing shims (27). Inspect the oil
seal and, if replacement is required, press it from
the bearing cap.
Disengage the capscrews (5) and remove the cov-
er plate and gasket (16 and 17). Position two
spacer bars on the drive side of the helical gear
(15) to prevent it from moving as the drive shaft (25)
is removed.
Install a standard 5/8-11 UNC x 1-1/4 inch long
capscrew (not supplied) in the tapped hole in the